基于移频算法的机载设备承载板动柔度设计  

Design of dynamic stiffness of airborne equipment bearing plate based on generalized incremental frequency technique

作　　者：任晓斌[1] 黄从甲 李宝童 REN Xiaobin;HUANG Congjia;LI Baotong(Yuan-Fang Test System Research Center,Chinese Flight Test Establishment,Xi’an 710089,China;Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]中国飞行试验研究院远方测试系统研究中心,陕西西安710089 [2]西安交通大学现代设计及转子轴承系统教育部重点实验室,陕西西安710049

出　　处：《中国测试》2020年第6期18-26,共9页China Measurement & Test

摘　　要：随着现代飞机性能要求的大幅度提高,机载设备特别是电子设备将承受更加恶劣的机械振动环境。因此,为提高机载设备的可靠性,需对其进行动柔度的优化设计。该文以某型机载设备承载板为研究对象,根据承载板的工作状况和结构形式,建立承载板基于移频算法的优化数学模型。通过数值分析的手段对承载板进行动力学优化设计研究,以降低结构整体动柔度为目标函数,对承载板的支撑筋板进行拓扑优化设计。相比于传统动力学优化设计方法,该方法能够获取结构在整个频率区间的最优解,降低结构的动柔度,并可为现有各种机载设备的动柔度设计提供参考。With the performance requirements of modern aircraft improved drastically,the airborne equipment,especially the electronic equipment,will withstand more severe mechanical vibration environments.Therefore,it is necessary to optimize the dynamic stiffness of the equipment,in order to improve the reliability of airborne equipment.This paper takes a certain type of airborne equipment bearing plate as the research object,and establishes an optimized mathematical model of the bearing plate based on the generalized incremental frequency technique according to the working condition and structural form of the bearing plate.The numerical analysis method is used to study the dynamic optimization design of the load bearing plate.With the objective function of reducing the overall dynamic compliance of the structure,the topological optimization design of the stiffener of the load bearing plate is performed.This method can obtain the optimal solution of the structure in the entire frequency range,which greatly reduces the dynamic compliance of the structure.Therefore,this method has reference value for the dynamic optimization design of airborne equipment,it can provide help for the dynamic stiffness design of existing airborne equipment.

关 键 词：机载设备 动柔度 移频算法 拓扑优化 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程]