An active control study of the 1Cr18Ni9 steel plate multipoint excitation

Abstract

A multipoint excitation experiment system of the 1Cr18Ni9 steel plate-pipe network as the main vibration body was established, which used transient flow produced by the wave exciter to excite the 1Cr18Ni9 steel plate-pipe network to vibrate. The experimental results show that the 1Cr18Ni9 steel plate vibrates in three dimensions. The vibrations of the particles of the steel plate distributing along the pipe’s axial have phase differences and take place near the cylinder side first. Therefore, it is a multipoint vibration mode. The amplitude of the 1Cr18Ni9 steel plate increases as the system pressure increases and decreases as the wave exciter’s frequency decreases. The vibration intensity of the particles of the 1Cr18Ni9 steel plate close to the cylinder is the strongest and the amplitude is the highest in Y direction at a given system frequency. The vibration intensity of the particles close to the wave exciter is the strongest and the amplitude is the smallest in Z direction at a given system pressure.

Keywords

multipoint excitation / steel plate / active control / transient flow / pipe network

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