跌落式冲击试验台后峰锯齿冲击数值分析与试验研究

为了降低冲击试验的风险和成本，提高试验效率，文章试图构建跌落式冲击试验台后峰锯齿冲击波形库。首先建立后峰锯齿冲击响应模型并对其进行数值分析；然后设计多种规格的铅锥开展后峰锯齿冲击试验并采集试验谱形数据，完成后峰锯齿冲击波形库的构建；最后依据试验数据对冲击响应模型进行修正，得到加速度峰值以及脉宽与铅锥锥角、跌落高度的关系式。该研究成果经型号产品试验验证，提高了后峰锯齿冲击试验的效率。

Numerical analysis and experimental study of the terminal-peak sawtooth pulses produced by drop-test shock machine

In order to reduce the risk and the cost while improve the efficiency of the impact tests, a final peak sawtooth waveform library is built for the drop-type shock test bed. Firstly, the model of the terminal-peak sawtooth impact response is established and analyzed numerically. Then, a variety of lead cones are adopted for the final peak sawtooth impact tests to collect the test spectrum data. Finally, the impact response model is modified with the test data. The relation of the peak acceleration and the pulse width with the cone angle and the drop height are obtained, and the final peak sawtooth shock waveform library is constructed. The results are validated in the application on the product test and improved efficiency is shown.