摘要
水平冲击试验台可用于舰载设备抗冲击能力的考核试验,但导轨导向的水平冲击试验台工作时会出现卡死问题,为此提出挠性板导向的水平冲击试验台。为验证其可行性,用有限元方法计算分析了该试验台的输出波形以及挠性板的应力分布情况。结果发现,挠性板在冲击过程中储存弹性势能,对试验波形有一定的影响;台体最大位移设计值为94mm,计算值为89.5mm,减少了4.8%;台体最大速度设计值为4m/s,计算值为3.93m/s,减少了1.75%;台体正波峰值加速度设计值为571m/s^2,计算值为532m/s^2,减少了6.8%;台体负波峰值加速度设计值为175m/s^2,计算值为183m/s^2,增加了4.6%。因此用挠性板作为导向装置能够满足冲击试验台对设计波形的要求。
The horizontal shock testing machine can be used to test the impact resistant ability of the shipboard equipments, but the shock testing machine guided by the lead rail possible is likely to occur stuck fault during working. Therefore, the horizontal shock testing machine, which guided by the flexible plate was put forward. To verify the feasibility, using the finite element method to analyze the output waveform of the shock testing machine and the stress distribution of the flexible plate. Then find out the flexible plate stored elastic energy in the process of impact which has a certain influence on the testing waveforms. The test-bed theoretical value of maximal displacement is 94 mm, the calculated value is 89.5 mm, the decrease is 4.8%. The test-bed theoretical value of maximal speed is 4 m/s, the calculated value is 3.93 m/s, the decrease is 1.75%. The test-bed theoretical value of positive wave peak acceleration is 571 m/s^2 , the calculated value is 532 m/s^2 , the decrease is 6.8%. The test-bed theoretical value of negative wave peak acceleration is 175 m/s^2, the calculated value is 183 m/s^2 , the increase is 4.6%. Therefore, the flexible plate as a guide equipment can satisfy the theoretical requirement of the shock testing machine for waveform.
关键词
舰载设备
冲击
试验台
挠性板
波形
Shipboard equipments
Impact
Test-bed
Flexible plate
Waveform
