Carbon fiber-based composites (CFCs) have garnered widespread attention due to their exceptional mechanical properties and have been widely used in various fields such as aerospace, transportation, and military industries. However, little research has been conducted on the underlying mechanisms and factors affecting the photo/ electrical conversion of CFCs. In this study, a carbon fiber reinforced polyamide 12 (CF/PA12) composite was fabricated via selective laser sintering. The results showed that the CF/PA12 composite exhibited excellent photo-thermal conversion and Joule heating characteristics with the optimal mass fraction (15 wt%) of carbon fiber. The temperature of the CF/PA12 composite increased gradually with increasing solar intensity and reached its highest value when the CF/ PA12 was oriented parallel to the light direction. This study also demonstrated the selective regulation of CF/PA12 fiber orientation on material resistance and thermal resistance. A voltage continuously adjustable mode that integrates photothermal conversion was designed and verified through recyclable tests. The findings of this study expand the applications of carbon fiber reinforced polymer composites in temperature regulation and operation control.

Cu-0.6Cr alloy was extruded by liquid nitrogen cooling equal channel angular pressing (ECAP) route-Bc and aging treated at 400 °C–500 °C; the structure and orientation distribution of the alloy were detected by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), electron back-scattered diffraction (EBSD) and TEM. The purpose is to detect the influence of deformation conditions and aging treatment on the microstructure and properties of the materials, and to analyzed the microscopic mechanism of the precipitates formation process and transformation. The results show that the cryo-ECAP-Bc deformation will accelerate the interaction between the microstructure and texture of the Cu-0.6Cr alloy, and reduce the limitation size of the grains after deformation. Strain increase can promote increasing the amounts of micro/nano precipitates discontinuous distribution on the grain boundaries. After 4 passes of extrusion and aging at 450 °C, the tensile strength, hardness and elongation of the material reach to 555.0 MPa, HV 167.3 and 13.1%, respectively, and the conductivity exceeds 84%IACS. The synergistic effect of microalloying, solid solution, cryo-ECAP and aging, and the formation of {111} <112> and {111} <110> textures are beneficial to improving the conductivity of the alloy simultaneously.

The effect of retained austenite on the fatigue property of a novel Fe-0.65C-1.5Mn-1.5Si-0.6Cr-0.05Nb (wt.%) quenching-partitioning-tempering (Q-P-T) steel was investigated. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy were performed to characterize the evolution of microstructure including retained austenite fraction and average dislocation densities in both martensite and retained austenite. Compared with traditional quenching and tempering (Q&T) steel, Q-P-T steel contains much more retained austenite by partitioning of carbon from supersaturated martensite to retained austenite. After Q-P-T, the tensile strength decreases slightly, while the elongation and the product of strength and elongation (PSE) improved 287% and 234%, respectively. The fatigue limit of Q-P-T steel (650 MPa) is increased by 100 MPa (18.2%) compared with Q&T steel (550 MPa). The mechanism of high fatigue performance for high-carbon Q-P-T steel is mainly stemmed from two aspects: one is the dislocation absorption of the retained austenite (DARA) effect existing in the fatigue test, which significantly enhances the deformation ability of martensite matrix; the other is the deformation-induced martensitic transformation effect which can effectively arrest crack to against fatigue. This work verifies the existence of DARA effect in high carbon Q-P-T steel under cyclic tension and compression loading and makes the third-generation advanced high-strength steels extend to the field of cyclic variable loads from static loads.

The localized corrosion mode and process dependence on ageing conditions for Al-7.82Zn-1.99Mg-2.41Cu-0.12Zr alloy were investigated. Intergranular corrosion (IGC) is the dominant corrosion mode for UA temper alloy due to the small size (8.48 μm) and low distribution continuity (L_GBPs/GB=0.75) of grain boundary precipitates (GBPs), whereas pitting corrosion is the dominant corrosion mode for T74 and T77 temper alloys because the large size (>18.5 μm) and discontinuous distribution (L_GBPs/GB<0.5) of GBPs inhibit the occurrence of IGC. The corrosion mode of T6 temper alloy evolves with immersion time from pitting corrosion to IGC. Pitting corrosion is initiated at the site of Al₇Cu₂Fe particles. Al₇Cu₂Fe particle with larger size shows a higher potential difference value of 58.4 mV with the matrix, implying that larger Al₇Cu₂Fe particle is preferred to be the initial sites for pitting corrosion. At the initial stage of corrosion, the surface of T6 temper alloy is attacked by pitting corrosion. Al and Mg elements in the matrix around Al₇Cu₂Fe particles are preferentially dissolved. As the immersion time prolongs, the surface is attacked by intergranular corrosion.

The unique physical and chemical properties of silicon nanotubes are expected to play a huge potential role in the field of new energy. So far, there are relatively few reports about their applications in the new energy field. Firstly, this paper reviewed the research progress of silicon nanotubes in lithium-ion batteries, solar cells, large-scale energy storage and energy saving. Then, the effects of pores, thin walls, coatings and shells on the application of silicon nanotubes in lithium-ion batteries were introduced detailedly. And the prospective applications of silicon nanotubes in new energy field, such as thermal management, fuel cells and flexible batteries were also demonstrated. Finally, the main problems involved in the application and development were summarized, and the potential solutions about these problems were proposed respectively. It is expected that this paper is valuable in the application and research of silicon nanotubes in the field of new energy.

Nowadays, sulfide ores are a huge source of precious metals. One of the main problems for working with sulfide ores is their low solubility in acids (K_sp<10⁻²⁰) and the production of toxic and harmful by-products. In the present study, the use of aluminum permanganate [Al(MnO₄)₃] oxidizer for sulfide ore dissolution and metal extraction has partially solved this problem. Taguchi experimental design based on Aspen Hysys modeling assembled has been applied to dissolution study of sulfide ores with Al(MnO₄)₃ oxidizer as a novel plan from experimental to industrial scale. The optimum results have been utilized as the primary data for the simulation and sensitivity analysis of the process by Aspen Hysys software. The effects of operating parameters including pH, retention temperature, agitation rate, retention time, amount of Al(MnO₄)₃ consumed, leaching density, grain size and oxygen pressure have been investigated on the extraction efficiency of metals from sulfide ores. Under optimized conditions, Zn, Cu, and Pb metal extraction efficiency was obtained above 77%, 73%, and 70%, respectively.

High-Fe bauxite is a typical refractory bauxite with extensive resources, and coal gangue is a solid waste produced during coal preparation. In this study, the co-roasting of high-Fe bauxite with coal gangue for iron and aluminum recycling was explored. The optimum conditions for co-roasting were roasting at 750 °C for 50 min with 40% coal gangue, and 70.55% particles with size <37 µm. Through magnetic separation, iron ore concentrate with 55.09% TFe and a recycling rate of 82.73%, and aluminum-rich products with Al₂O₃ of 21.67% and a recycling rate of 75.55% were produced. Based on the analysis of materials, hematite was transformed into magnetite, and diaspore was transformed into Al₂O₃ through co-roasting. Therefore, the co-roasting of high-Fe bauxite and coal gangue is a promising process for recycling iron and aluminum.

This paper introduces a new method for efficiently extracting Rb and K from complex rubidium ore. It mainly consists of two steps: 1) thermal activating of rubidium ore and water quenching, and 2) leaching with sulfuric acid. After thermal activating and water quenching, the water quenched slag was in a highly active state. Efficient extraction of rubidium and potassium could be achieved at atmospheric pressure. Under the conditions of a thermal activation temperature of 1300 °C, CaO dosage of 30%, holding time of 60 min, leaching temperature of 50 °C, sulfuric acid concentration of 120 g/L, liquid-solid ratio of 10 mL/g, leaching time of 90 min, and stirring speed of 500 r/min, the average leaching rates of Rb and K in multiple parallel experiments reached 99.24% and 98.97%, respectively. The consumption of sulfuric acid in the acid leaching process could be reduced by 200 kg/t after two-stage leaching. Leaching kinetics showed that the leaching process of the rubidium ore water quenched slag was consistent with the hybrid control model and the apparent activation energy of the leaching reaction E_a=31.46 kJ/mol.

Arsenic alkali residue is a hazardous solid waste typically produced during antimony smelting and its comprehensive utilization is relatively difficult, with problems such as low As and Sb recovery rates, incomplete separation, and risks of secondary pollution. To address these problems, this study develops a novel method to treat arsenic alkali residue obtained from antimony smelting using a calcification transformation-carbothermal reduction process. The thermodynamic results reveal that the calcification transition increases the temperature difference between arsenic and antimony reduction, thus facilitating the separation of arsenic and antimony during the reduction process. Arsenic and antimony in the arsenic alkali residue get calcification rates of 99.67% and 98.74%, respectively, under the optimal conditions. The reduction of calcified slag under vacuum effectively separates arsenic and antimony, and the reduction rate in the calcified slag during the carbothermal reduction process is more than 99%. After the reaction and purification by vacuum distillation, As and Sb purities greater than 99.8% are achieved. Compared with traditional arsenic alkali residue treatment methods, this method can better separate and recover arsenic and antimony with higher purity.

In recent years, the efficient and clean recovery of valuable metals from waste lithium-ion batteries (LIBs) has become a hot spot in the field of resource recycling, which will produce significant environmental and economic benefits. This paper presents a treatment method for waste LIBs powder, including three stages, oxidation roasting,cyclic leaching and precipitation. In the First stage, the battery powder underwent a decarbonization process in an O₂ atmosphere (700 °C, gas flow rate 240 mL/min for 30 min), resulting in a decarbonization rate of 99%. In the second stage, valuable metals were leached in a sulfuric acid system with N₂H₄·H₂O as reductant. Under optimal conditions (0.64 mol/L N₂H₄·H₂O, 6 mol/L H₂SO₄, 80 °C, 5 mL/g, 120 min), the leaching rates of Li, Ni, Co, Mn, Al, and Cu were all over 90%. Also, using N₂H₄·H₂O as a reducing agent, Cu was removed from the leaching solution through cyclic leaching. Under the optimal conditions (0.64 mol/L N₂H₄·H₂O, liquid-solid ratio is 6 mL/g, 80 °C, 120 min), the precipitation rate of Cu was 96%, and Cu was reduced to Cu₂O to enter the precipitated slag. Finally, C₇H₅NaO₂ was used to selectively precipitate Al from the leaching solution, resulting in a precipitation rate of 96%. Al entered the precipitate in the form of Al(C₇H₅O₂)₃ which can be dissolved in dilute acid (0.5 mol/L HCL), allowing for benzoic acid to be recycled.

Clay minerals are known to negatively affect sulfur flotation. In the present study, the effect of clay minerals (kaolinite-montmorillonite) on chalcopyrite flotation was investigated and it was aimed to propose solutions to eliminate the negative effects. In the experimental studies, ζ-potential measurements and flotation experiments were carried out. The central composite design method was used in the flotation experiments and the independent variables were selected as frother concentration, dispersant concentration, froth height, air flow rate and amount of clay. In the evaluation of the test results, 5 important variables were determined as dependent variables. While the chalcopyrite grade decreased as the amount of clay increased, and chalcopyrite recovery, pyrite recovery and dynamic froth stability increased. The negative interaction order was determined as montmorillonite>kaolinite in terms of chalcopyrite flotation. Larger bubble diameter was obtained with montmorillonite. The flotation conditions that can be applied for the clay type (kaolinite and montmorillonite) found in the ore are mathematically modeled. Thus, the changes of the conditions in the model depending on the clay ratio that changes over time in the ore and the predictability of the grade-recovery values that can be obtained as a result of flotation will be ensured.

Accurately quantitative characterization of brittleness of coal or rocks is important for effective estimation of excavation efficiency in deep engineering. The in-situ stress evolution characteristics of layer sandstone during the whole life-cycle process must be accompanied by the energy evolution process. Therefore, based on the above energy evolution characteristics, a stress path of three-stage triaxial loading and unloading (TLUT) is proposed. Subsequently, the damage evolution law and brittleness index, BI₁₆, are obtained and defined. The results show that: 1) The confining pressure can enhance bearing capacity and plastic deformation resistance of layer sandstone. The loading way and confining pressure have significant influence on the plastic volumetric deformation resistance, but the inclination angle has little influence. 2) The pre-peak damage evolution process under conventional triaxial loading (CTLT) and TLUT can be divided into three stages and the pre-peak damage evolution process under TLUT can be divided into four stages. 3) The whole deformation process of layer sandstone can significantly affect its brittleness, which is dynamic and not constant. It can provide a certain basis for the accurate estimation of excavation efficiency in deep engineering.

Rockburst caused by mining disturbance may cause rock damage. Combining the microseismic (MS) multiparameter, high-magnitude MS event distribution, and MS tomography may be an effective method for hazard precursor identification in underground mining. Firstly, a self-developed MS monitoring system was built in an underground mine in Shaanxi, China. Then, based on the tomography results, a correlation model was established between velocity anomalies and mining activity regions, and rockburst risk areas were delineated. Furthermore, multi-parameters were analyzed, including b value (rock fracture parameter), S value (MS activity), tomography results, high-magnitude MS event distribution and the in-site survey in 795 and 860 levels of Shaanxi Zhen-ao Mine. Ultimately, based on the rockburst case on June 7 and the multi-parameters analysis of 795 level to 860 level of Zhen-ao Mine, the risk areas were identified. MS information can be used as an early warning identification of hazards, and has a wide application in the future.

Routine serried drilling (slotting) technology ruins the coal mass and support architecture of the anchorage ring during stress relief, and cannot resolve the conflict between stress relief and anchorage. Therefore, a novel powerful anchorage and stress relief technology was proposed in this study to balance the conflict. The numerical simulation analysis was conducted on the main stress difference (MSD) of stress relief in large-hole fabrication to acquire the first-best stress relief parameters. 1) When the distance between the starting site of the large-hole fabrication and the roadway wall (L_h), is small, the stress-crest region near the roadway cannot be effectively shifted far from the roadway. When L_h≥12 m, the stress data curve of the roadway rib exhibits a double high crest distribution. When L_h is 10 m, the new crest site of MSD of the roadway rib shifted far from the roadway is 7.5 m without ruining the anchorage function of the superficial part of the anchor cable. 2) The increase in the large-hole fabrication length does not lead to a change in the shape and size of the MSD between the starting site of the large-hole fabrication and the roadway wall. With the increase in the large-hole fabrication length, the migration degree of the crest site of the second MSD is larger than the degree of the crest size of the second MSD. 3) When the large-hole fabrication spacing is >5 m, the high MSD between neighboring large holes appears, resulting in invalid stress relief between neighboring large holes. When the large-hole fabrication spacing is ≤4 m, the small regions of the MSD produced by each large hole are connected, forming a continuous stress relief region in the deep part of the roadway rib. The engineering application results reveal that this powerful anchorage and stress relief technology can effectively control the deformation of the surrounding rock in a deep roadway.

The roadway stability of the lower coal seam (LCS) is a huge challenge to mine safety in close-distance coal seams. Herein, the floor stress distribution law of the upper coal seam (UCS) and the layout and control for the roadway in the LCS were studied based on a well-grounded engineering case of the Huasheng coal mine. First, the geological situation, rock mass parameters, and support scheme for the roadway were presented in detail. The asymmetric deformation mechanism of the roadway was discussed based on the data obtained from field observation, and the location of goaf in the UCS was determined using the images captured using borehole optical televiewer. Furthermore, a mechanical calculation model for the room-pillar group floor stress was established, and the floor stress distribution law of the room-pillar group goaf was analyzed using the semi-infinite plane theory. The results indicate that uneven stress under room-pillar group floor resulted in asymmetric deformation, with larger deformation closer to the coal pillar in the LCS. Then, the location and the support scheme for the roadway in the LCS were optimized and verified by numerical analysis and field application. Consequently, the results indicate that the roadway can be relatively well controlled.

In-situ leaching is the main way to realize fluidization mining of deep uranium ore, which has the characteristics of safety, low pollution and low cost. However, deep uranium mining is under high temperature and high pressure, which greatly affect the permeability of uranium deposit. The sandstone-type uranium deposits were taken as the research object in this paper, and a multiphase and medium flow experimental simulation system were used for solution seepage experiment under the action of temperature and confining pressure. Based on the permeability data obtained during the experiment, Origin software was used to process the experimental data. The results indicated that the permeability of sandstone-type uranium ore increased with temperature increased and decreased with confining pressure increased. The influence of temperature on permeability was higher than that of confining pressure. According to the trend of permeability change under the action of temperature and pressure, the higher the temperature, the more significant the permeability change under different confining pressure. The lower the confining pressure, the more significant permeability change under different temperatures. The maximum permeability of sandstone-type uranium ore was obtained under temperature of 80 °C and confining pressure of 6.0 MPa.

In this study, we use the differential transform method and Akbari-Ganji method to examine the influence of uniform magnetic field on the natural convection heat transfer of nanofluids flowing between two infinite parallel plates. The effects of the primary parameters of Prandtl number, squeeze number, Schmidt number, Hartmann number, Eckert number, Brownian motion parameter, and thermophoresis parameter have been investigated after obtaining the governing equations and solving the problem with specified boundary conditions. The similarity transformation is used to find the system of ordinary differential equations, and the Rung-Kutta fourth-order numerical technique is contrasted. The findings suggest that increasing the squeeze number leads to a decrease in velocity, while increasing the Hartman number has a similar effect. Moreover, the temperature rises with an increase in Hartman number, Eckert number, and thermophoretic parameters and is directly proportional to Prandtl number. Our study compares Akbari-Ganji and differential transform methods for solving nonlinear differential equations. It demonstrates that the former requires fewer computational steps and less computational time, making it a more efficient approach. The answers acquired using the suggested methods are consistent with those found in the literature. These results can help researchers to analyze quicker and easier and provide important insights into the complex behavior of nanofluid flow in the presence of electromagnetic fields.

The Ree-Eyring fluid is a type of non-Newtonian fluid with interesting characteristics of yield stress and shear thinning. Examples include emulsions, slurries, and polymer solutions. Keeping in view such amazing attributes of Ree-Eyring fluid, the aim of this analysis is to deliberate the flow of electrically conducting Ree-Eyring nanofluid due to a stretched surface under the impact of the magnetic dipole with surface-catalyzed reaction. Non-uniform heat generation/absorption and viscous dissipation effects are considered to analyze the heat transport phenomenon. The uniqueness of the envisaged model is enhanced by studying the entropy generation analysis with convective conditions at the surface of the boundary. Adequate transformations are employed to transform the system of partial differential equations (PDEs) into coupled ordinary differential equations (ODEs). An effective MATLAB bvp4c methodology is adopted for the numerical computations. Several graphs and numerically calculated results in tabular form are displayed. The outcomes revealed that the rate of irreversibility generation upsurges for the varied values of the Brinkman number. Also, upon minimizing the thermophoretic parameter, the temperature drops near the boundary whereas it upsurges far from the boundary. Surface catalysis parameter decreases the solutal profile. The endorsement of the foreseen model is also added to this study.

The petrographic characteristics of rocks are the determining factors affecting their mechanical properties. This study aims to intensively assess the effect degree of petrographic characteristics of granitic rocks on their uniaxial compressive strength (UCS) and determine the dominant factors affecting the UCS. The quantification of various petrographic parameters and mechanical properties of granitic rocks located in the Altai region of Xinjiang, China, has been carried out. Seven petrographic parameters including plagioclase content, K-feldspar content, quartz content, dark-colored mineral content, crystalline degree, mean grain size and sorting coefficient, were selected to investigate the effect of petrographic characteristics on the UCS of granitic rocks. The detailed analyses of the photomicrographs of the studied samples were used to understand the influence mechanism of each petrographic parameter on the UCS. The results show that the petrographic parameters affecting the UCS mainly include quartz content, feldspar content, mean grain size and sorting coefficient. The proportion order of the petrographic parameters affecting the UCS significantly as follows: sorting coefficient > feldspar content > quartz content > mean grain size, the sorting coefficient of grain size and feldspar content are the dominant factors affecting the UCS of granitic rocks. Ultimately, the feldspar minerals play a critical role in the UCS of the studied granitic rocks and they are the primary consideration when investigating the factors affecting the UCS of granitic rocks.

In dense urban building environments, various adjacent construction projects will inevitably occur during the large-scale construction of urban underground transportation projects. Based on an actual project, this paper conducted a practical study on the construction control technology of a four-hole shield tunnel passing through existing bridge-pile foundations over a short distance and proposed a micro-disturbed control technology system of “two-stage analysis method theoretical prediction + active control and passive protection”. The core content of the technology system included the following: 1) By introducing an additional ground loss ratio, a theoretical calculation method for predicting the deformation of pile foundations during the adjacent construction of a multi-line tunnel was established, which enabled the preconstruction prediction of the influence of construction on the adjacent structures. 2) A multi-coupled numerical model, which included tunnels, strata, and pile foundations, was developed to analyze the mechanical behavior of the pile foundations during the entire construction process. 3) Combined with practical engineering experience, the control measures of this project were implemented in terms of active control and passive protection. The deformation of the pile foundations was effectively controlled during the construction process, which certified that the proposed micro-disturbed control technology was reasonable and feasible.

This study developed a finite-element lower-bound procedure to investigate seismic slope stability in homogeneous and non-homogeneous soils. In order to account for dynamic earthquake inputs, horizontal and vertical accelerations are expressed by the pseudo-dynamic approach, in the form of sinusoidal functions. Within the framework of lower-bound theory, the seismic slope stability analysis is transformed to a linear programming problem subjected to: stress equilibrium, stress discontinuity, stress boundary and yield conditions. An interior-point algorithm implemented into MATLAB was adopted to seek optimal lower-bound solutions of slope bearing capacity and safety factor. The proposed procedure for lower-bound analysis of seismic slope stability was validated by comparing the slope safety factor obtained from different approaches including limit equilibrium and Abaqus. A nonuniform soil slope with linearly varied and layered soil strength parameters and non-associated flow rule are considered, and the corresponding effects on seismic slope stability are discussed. The true solution of safety factor to seismic slope stability is well assessed by rigorous lower and upper bounds with the discrepancy no greater than 4.5%.

With the rapid development and construction of tunnel engineering across active faults, the analysis and design methods for crossing-fault tunnels urgently need appropriate theoretical guidance. Under the action of fault dislocation and ground motion, the influence law and failure mechanism of segmental lining structures with different lengths were explored via shaking table model test and numerical simulation. The results show that the structural relative displacement between the hanging wall and the fracture zone is reduced, accompanying by the decrease of lining longitudinal connection stiffness, while the variation tendency of structural relative displacement between the footwall and the fracture zone is to the contrary. Therefore, the lining segments near the hanging wall should be divided into smaller segments, and the lining segments near the footwall should be larger according to engineering requirements. Combined with the test results, the fortification range of the affected zone near fault is proposed. The function of lining joints should also be considered when dividing the length of segments, so that the smooth transition of longitudinal lines under the affection of fault dislocation can be realized. It is found that the failure evolution process of numerical simulation is well coincided with the result of shaking table test.

Piecewise linear representation (PLR) techniques have been widely adopted to recharacterize high-dimensionality time series data in numerous fields for purposes of dimensionality reduction, fluctuation filtering, and overall trend extraction. However, this technique has not yet been applied to pressure waves of high-speed trains (HSTs). This study therefore introduced PLR techniques to recharacterize typical high-dimensionality pressure waves for the first time. A well-performing PLR algorithm based on perceptually important points (PIPs) was specifically designed for pressure waves of HSTs. The results reveal that the measurement methods of data point importance and assessment methods for segmentation errors, particularly the former, have impacts on identification priority and even the final result of PIPs of pressure waves. The PLR_PIP algorithm using vertical distance as the measurement of data point importance (PLR_PIP_VD) achieves a more reasonable PLR of pressure waves compared to those of the Euclidean distance and orthogonal distance. Through comparisons among cumulative error, average error, and maximum error, the PLR_PIP_VD algorithm employing cumulative error as the assessment method of segmentation errors accomplished a preferable PLR of pressure wave. The design of the PLR_PIP algorithm applicable to the PLR of pressure waves was finally proposed. This provides a novel processing method for pressure waves of HSTs.

When a train passes through underground stations quickly, strong transient pressure fluctuations will generated. In this paper, a moving model experimental device is adopted to explore the distribution of transient pressure on the surfaces of train and platform screen doors when the train passes through an underground station. An analysis of the effect of ventilation shaft locations on alleviating transient pressure was also carried out. The findings indicate that the pressure fluctuations of corresponding monitoring points on different platform screen doors are quite different. The ventilation shaft can affect the pressure peak values, and the influence characteristics of the shaft at different locations are quite different. The shaft located next to the platform has the most profound impact on alleviating the transient pressure amplitude on the surfaces of the train and platform screen doors. In comparison to a station without a shaft, the pressure amplitude of the monitoring point H2 arranged on the train surface can be reduced by 47.1%, and the pressure amplitude of the monitoring point P1 on the surface of platform screen doors decreases by 71.3% when the shaft was set near the platform.