某机载数据终端随机振动及疲劳分析

Random Vibration and Fatigue Analysis of An Airborne Data Terminal

机载数据终端是飞机测控系统的重要组成部分,飞机飞行过程中产生的随机振动是使其结构失效的主要因素。为了提高机载数据终端的可靠性,基于ANSYS Workbench软件平台对某机载数据终端进行模态分析、随机振动分析和疲劳计算,获得了机载数据终端在随机振动下的变形云图和应力分布云图,并根据仿真结果对结构进行优化。经设计改进后的机载数据终端顺利通过振动试验并交付使用,说明了仿真结果的合理性,也为进一步的结构优化和新设计提供了参考。

Airborne data terminal is an important component of the airplane TT&C system.The random vibration,emerged in the flying process of the airplane,is a main factor of its structural failure.In order to improve the reliability of the airborne data terminal,based on the software platform of ANSYS Workbench,the modal analysis,random vibration analysis and fatigue calculation of the airborne data terminal are carried out,the deformation picture and stress picture during the random vibration of the airborne data terminal are obtained.According to the simulation result,structure optimization is conducted.After design improvement,the airborne data terminal passed the vibration experiment and it was handed over to the user.This illustrates the rationality of the simulation result.The simulation process and result can provide some reference for next step of structure optimization and new design.