应力波法测量冲击能吸能结构单元优化与试验

Optimization and Experimental Study on Energy Absorbing Structure Unit of Measuring Impact Energy by Stress Wave

从应力波动理论分析出发,建立了多点摩擦系数的吸能结构单元数学模型,并对此数学模型进行了优化。优化结果表明:渐增摩擦系数的吸能结构单元数学模型反射能量系数最小。优化前后的吸能结构模型经过对比试验,结果基本相符。试验结果表明:采用渐增摩擦系数的吸能装置较等摩擦系数的吸能装置反射能系数减少21.38%,冲击能测量相对误差减少15%。

The mathematical model of the energy absorbing structure with muhi point friction coefficient derived from the stress wave theory, and this mathematical model is optimized. Optimization results show that the reflection energy coefficient of mathematical model of the energy-absorbing structure with increasing friction coefficient can be minimized. Experimentalresults show that the reflection energy coefficient of the energy absorption deviceof increasing friction coefficient thanthe mean friction coefficient reduced by 21.38%, and the relative error of impact energy measurement is reduced by 15%.