飞行过程中惯导系统的随机振动响应分析

Random vibration analysis of INS in flight

用有限元方法建立某飞行器惯导系统动力学分析的计算模型。进行了该模型在自由状态与边界约束状态下的模态参数计算 ,以及基础激励下的随机振动响应分析。通过对橡胶减振器进行三维实体有限元建模 ,研究了橡胶减振器连接刚度和阻尼特性参数对惯导系统响应的影响 ,并将计算结果与试验数据进行了比较。

A finite element model of dynamic analysis for an inertial navigation system (INS)of certain filght vehicle is established.Structural modal characteristics are calculated in the conditions of free and boundary constraint.And random vibration response of INS is analyzed in support motion.Based on the solid finite element modeling of rubber damper,the influences of connected stiffness and damping characters of rubber damper on dynamics response are investigaled and the numerical results are compared with the experimental results.