发射装置模拟试验承压结构的预应力模态分析

Prestressed Modal Analysis of Pressurized Structure for Launcher Simulation Experiment

发射装置模拟试验承压结构——假海在试验时受到发射冲击的作用,会产生强烈的振动。假海的振动特性能够为测试设备的安装提供指导,保证测试设备能安装在适当的位置。通过对假海进行预应力模态分析,得出其模态特性没有发生明显的变化,从而得出在预应力作用下假海没有发生明显的应力刚化。最后通过对假海固有振型的分析得出安装测试设备的最佳位置。

During the launcher simulation experiment , the pressurized structure - false sea will produce strong vibration under the effect of launching shock. The vibration characterist ics of the false sea can provide guidance for test equipment instal lation to ensure the equipment be instal led in the proper position. Through prestressed modal analysis of the false sea, it is concluded that the modal characterist ics do not obviously change, so no obvious stress stiffening of the false sea occurs under the effect of prestress. Final ly,the optimum instal lation position of the test equipment is obtained through analyzing the natural vibration mode of the false sea.