摘要
滚柱回转形式飞机投放挂架结构形状复杂,且工作中发生影响其投放功能的较大塑性变形和残余应力,但运用解析方法很难求解。文中首先通过对一对圆柱体的挤压变形分析,对比经典Hertz公式与数值分析方法的计算结果,说明采用ANSYS有限元软件分析接触问题的有效性。然后运用ANSYS软件对挂架结构进行塑性变形和应力分析,并与试验结果进行比较,验证数值分析方法和应用软件求解复杂形状结构接触塑性变形问题的有效性。研究方法对挂架结构的进一步修改和优化奠定了数值分析基础。
The structure of the load releasing mechanism connecting with a plane is complex, and plostic deformation occurs while the mechanism operates. It is difficult to obtain its plastic deformation and residual stress by analytical methods. Comparing the deformations of two contact cylinders obtained by classical Hertz＇ s formula with that by the ANSYS software, it is found that ANSYS software is valid for the contact problem. Then the plastic deformation and stress of the load release mechanism are calculated using FEM （finite element method） and ANSYS software. Comparing the plastic deformation given by the FEM with the experimental result, the validity of the numerical method is shown. This method will be useful for the further modification and optimization of the structure.
出处
《机械强度》
EI
CAS
CSCD
北大核心
2008年第5期809-813,共5页
Journal of Mechanical Strength
基金
教育部留学回国人员实验室基金资助(030401)~~
关键词
有限单元法
接触分析
塑性变形
飞机投放挂架
Finite element method
Contact analysis
Plastic deformation
Load releasing mechanism for planes
