Explicit optimization method for cutting-screw-thread on the basis of dual-RSM

Abstract

To obtain the explicit function for optimizing the cutting-screw-thread (CST) in crash, the simulations of frontal crash at the speed of 56 km/h have been carried out in VPG. The peak acceleration in crash has been taken as the evaluation index of energy absorption characteristics. First, the single factor experiment was taken based on six parameters affecting on the absorption characteristics of CST. Second, the peak acceleration function of each parameter by using response surface method (RSM) is obtained. Third, the explicit resultant peak acceleration function of six parameters by using RSM again is obtained. A dual RSM-based explicit method is proposed. According to this function, the best size dimensions of CST in different crash conditions could be easily obtained. Finally, an example shows that the values of the calculation errors for simulation value and target value (40 g) are 3.6% and 1.3%, respectively. This method can satisfy the demand for engineering accuracy.

Keywords

vehicle engineering / crash / safety / explicit method / response surface method

References

[1] Lei Z B. Cutting the screw thread. <patent>China Patent: ZL03124568.4</patent>, 2005.<month>10</month>.<day>12</day>

[2] Lei Z B. Adaptive impact energy absorption device. <patent>China Patent: ZL200710034933.2</patent>, 2008.<month>8</month>.<day>25</day>

[3] Lei Z B, Wang S J, Fu A J. The Safety and Energy Absorption of Vehicle Crash. Changsha: National University of Defense Technology Press, 2008 (in Chinese)

[4] Wang S J, Lei Z B, Zhao J. The electronic control system of CST with bumper system. Journal of Vibration and Shock, 2009, 28(2): 181-186

[5] Liao X T, Li Q, Zhang W G. Crashworthiness simulation design optimization using successive response surface methodology. Journal of Mechanical Strength, 2007, 29(6): 941-945

[6] Lei Z B, Yu J X, Yan H Q, Zhou Z G, Zhou P Y. Research on interrupted type of concrete guardrails using orthogonal design. Journal of Vibration and Shock, 2007, 26(7): 13-16 (in Chinese)

[7] Livermore Software Technology Corporation. LS-DYNA Keyword User’s Manual Version970, 2003

[8] Sun D Q, Zhang W H. In plane impact properties of aluminum double walled honeycomb cores. Journal of Vibration and Shock, 2008, 27(7): 69-74

[9] Song W W, Du X Y. A simple method to solve cubic curve fitting. Machine Building and Automation, 2008, 37(6): 104-106

[10] Wang X. Experimental Design and Application of SPSS. Beijing: Chemical Industry Press, 2006 (in Chinese)

[11] Stander N, Craig K J. On the robustness of the successive response surface method for simulation-based optimization. Engineering Computations, 2002, 19: 431-450

Acknowledgements

The authors gratefully acknowledge the financial support of the Open Fund of Engineering Research Center of Catastrophic Prophylaxis and Treatment of Road & Traffic Safety (Changsha University of Science & Technology), Ministry of Education, and the Postgraduate Innovation Fund of Hunan Province (No. CX2009B183), the Science and Technology Program of Hunan Province (No. 2008CK3074), Changsha Key Program, and the 863 Program of China (No. 2006AA11Z224).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg