基于DDAM方法的某舰载火控雷达抗冲击仿真计算

Simulation and calculation of shock resistance of a Ship-borne Fire Control Radar based on DDAM

通过建立某舰载火控雷达天线及天线座有限元模型,采用DDAM分析方法,结合GJB 1060. 1相关规定,对火控雷达天线及天线座进行了在加速度载荷作用下的垂向、横向、纵向的抗冲击性能仿真计算。由计算结果可知,结构在承受冲击载荷作用下,应力较大的部件主要是锁紧螺母和左右半轴,其余部件承受的应力相对较低。因此在结构设计和材料选取过程中需要对锁紧螺母和左右半轴着重考虑,使其在抗冲击性能方面满足GJB 1060. 1及相关规范和设计要求。

Based on the finite element model of a Ship-borne Fire Control Radar’s antenna and antenna base,the vertical,transverse and longitudinal shock resistance are simulated by means of the Dynamic Design Analysis Method( DDAM) and GJB 1060.1. The calculation results shows that with the shock load,the main parts with high stress are the lock nut,left half shaft and right half shaft,and the other parts have lower stress. Therefore,it is necessary to give careful consideration for the lock nut,left half shaft and right half shaft in the process of structural design and material selection,so that they will meet the requirements of GJB 1060.1 as well as the related design codes in terms of shock resistance.