【摘要】 随着导弹等航天器飞行速度的提高,环境噪声的影响已不容忽视,声振综合环境将成为惯导系统等弹上电子设备通常需要面对的力学环境条件。文章论证了有限元法适用于对捷联惯导系统这类结构紧凑型设备进行宽频域声振耦合计算,仿真计算了捷联惯导系统声振耦合模型在声振综合环境下的动力学响应,对比分析了捷联惯导系统在声振综合环境下与在单独随机振动环境、单独噪声场环境下动力学响应的联系、区别以及自身新的特点。研究结论可为设计和评估地面力学环境试验、预示与分析惯导系统在综合环境下的环境适应性提供理论依据。更多还原

【Abstract】 Along with the enhancement of spacecraft’ s flight velocity,acoustic environment can not be neglected,and vibro-acoustic combined environment is the mechanics environment condition that SINS and other missile-borne electronic equipments often suffer.It is argued that in this paper,FEM method can be applied to simulate vibro-acoustic coupled problems of SINS and other compact structure equipments in a wider frequency range.The dynamic response of SINS to vibro-acoustic combined environment is simulated,and contrasted with the response to random vibration environment and the response to acoustic environment.Then its characteristics are educed.The conclusions are helpful to design or evaluate land dynamic experimentation,and predict or analyse environmental worthiness of SINS under vibro-acoustic combined environment.更多还原