框架类机载设备支架的结构设计与试验研究

为解决满足高强度与轻量化要求的复杂框架类设备支架仿真模型不够精确的难题，通过在有限元分析设计的基础上，利用静力加载试验方法找出结构强度的薄弱环节，再建立结构力学模型进行失效机理分析，提出改进方案.静力试验结果表明:新的设备支架未发生明显塑性变形，局部设计改进有效，满足了航空极限过载要求；仿真、试验与理论模型相结合的设计方法可实现以较少材料增量的方式提高产品强度，为框架类支架设计改进提供有效的方案. 

Structural Design and Experimental Research of Airborne Equipment Framework

In order to improve the accuracy of simulation model of complex framework-type equipment support and meet the requirements of high strength and light weight, a static loading test was performed to discover the weak links on the basis of finite element analysis. Then, a structural mechanics model was established to obtain the failure mechanism and an improvement scheme was proposed. Finally, the failure mechanism was obtained to improve the local design. The static loading test results show that the improved equipment support has no obvious plastic deformation and the local design improvement is effective, meeting the requirements of aviation limit overload. Therefore, the design method, combining simulation, experiment and theoretical model, can improve the product strength with little material increment, which can provide an effective way to improve the design of framework-type equipment supports.