时域分析法在冲击仿真中的应用

Application of time domain analysis method in impact simulation

参照前联邦德国国防军舰建造规范BV043/85规定提供的某三线谱参数下的冲击环境,确定了某船用系统的冲击谱,并将其转换为双半正弦加速度冲击载荷,分析了双半正弦波输入的冲击流程。针对ANSYS软件中不能在设备底部加载局部加速度载荷的问题,使用时域分析法计算了设备的输出响应,根据经验分别尝试了以大质量法、强制位移法输入的载荷方式进行仿真计算,结果表明两种方式的输出响应是一致的,说明以上两种算法是等效的。

With reference to the shock environment under some three-line spectrum parameters stipulated by the former federal German national defense warship construction specification BV043/85,the impact spectrum of a marine system is determined,and it is converted into a double-half-sine acceleration shock load,and the impact flow of the double-half-sine wave is analyzed.In view of the problem that the ANSYS software cannot load the local acceleration load on the bottom of the equipment,the output response of the system is calculated through the time domain analysis method.Based on the experience,the simulation calculation is carried out with the large mass method and the forced displacement method.The results show that the output response of the two methods is consistent,indicating that the above two algorithms are equivalent.