某型飞机起落架防扭臂结构轻量化设计  

Research on lightweight design of anti-twisting arm structure of aircraft landing gear

作　　者：王琨 赵知辛[1,2] 汪杰 薛旭东 WANG Kun;ZHAO Zhi-xin;WANG Jie;XUE Xu-dong(School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723000,China)

机构地区：[1]陕西理工大学机械工程学院,陕西汉中723000 [2]陕西省工业自动化重点实验室,陕西汉中723000

出　　处：《陕西理工大学学报（自然科学版）》2020年第5期6-13,共8页Journal of Shaanxi University of Technology:Natural Science Edition

基　　金：陕西省科技厅重点研发计划项目(2019GY-068);陕西省教育厅专项科研计划项目(16JK1147)。

摘　　要：以某型飞机起落架为研究对象,利用有限元方法建立了缓冲支柱与上下防扭臂的三维模型。首先对防扭臂结构进行了静力学分析,计算结果表明防扭臂刚度冗余很大;于是以单元相对密度为设计变量,在满足强度与刚度的要求下,以防扭臂的体积最小为目标对防扭臂结构进行了拓扑优化;再利用响应面优化方法以防扭臂上槽深、圆孔直径为设计变量,在满足强度与刚度的要求下,以防扭臂的质量为目标函数对防扭臂进行了尺寸优化。优化结果表明:防扭臂质量共减少了22.6%,强度性能明显增强,对刚度影响不大。Taking the landing gear of a certain aircraft as the research object,a three-dimensional model of the buffer strut and the upper and lower anti torsion arm is established by using the finite element method.Firstly,the static analysis of the anti-twisting arm structure is carried out.The calculation results show that the rigidity redundancy of the anti-twisting arm is very large,so the topology optimization of the anti-twisting arm structure is carried out with the relative density of the element as the design variable,and the minimum volume of the anti-twisting arm as the goal under the requirements of strength and rigidity.The response surface optimization method takes the depth of the groove and the diameter of the circular hole on the anti-twisting arm as the design variables,and takes the quality of the anti-twisting arm as the objective function to optimize the size of the anti-twisting arm under the requirements of strength and rigidity.Two kinds of optimization results show that the mass of anti-twisting arm is reduced by 22.6%,the strength performance is obviously enhanced,and the influence on the rigidity is not significant.A feasible method is put forward for the lightweight research of anti-twisting arm structure.

关 键 词：飞机起落架 防扭臂 拓扑优化 尺寸优化 

分 类 号：V226.3[航空宇航科学与技术—飞行器设计]