基于Ansys/LS-Dyna的可靠性强化试验台仿真分析辅助设计

Simulation Aided Design of Reliability Enhancement Testing Equipment Based on Ansys/LS-Dyna

气动试验台是进行可靠性强化试验的关键设备,主要由台板、支撑弹簧和安装在台板底部的多个激振气锤组成。为保证气动试验台的宽频随机振动加速度有效值达到一定的量级,在设计之初通过Ansys /LS-Dyna进行试验台的振动加速度响应数值仿真,确定了支撑弹簧刚度及安装位置以及激振气锤的组合方式对加速度响应的影响情况。通过数值模拟结果对确定的支撑弹簧刚度、安装位置及最佳的气锤组合方式进行设计,实测结果表明所设计的试验台能够满足工程应用的需要。

Pneumatic test rig is the key equipment for reliability enhancement testing, which is composed of a table, support springs and the air hammers mounted under the table. In order to ensure that the virtual values of the test rig’s broadband random vibration acceleration reach a certain level, the vibration acceleration response was simulated through Ansys/LS-Dyna at the beginning of the de-sign, and then it was identified that how the springs’ stiffness, their mounting positions and the combination of the exciters affected the acceleration response. The actual design was completed according to the simulation results and the measured results showed that the designed test rig can meet the needs of the engineering application.