汽车起重机主副臂结构的几何非线性分析  

Geometric Nonlinear Analysis of Main and Jib Structure of Truck Crane

作　　者：秦旺林 刘士明 李聪 孟丽霞 QIN Wang-Lin;LIU Shi-Ming;LI Cong;MENG Li-Xia(Shenyang Jianzhu University,School Mechanical Engineering,Shenyang Liaoning110168,China)

机构地区：[1]沈阳建筑大学机械工程学院,辽宁沈阳110168

出　　处：《机电产品开发与创新》2021年第4期98-101,共4页Development & Innovation of Machinery & Electrical Products

基　　金：国家自然科学基金“大柔度起重机械复杂梁杆结构分析方法研究”(51505304)。

摘　　要：为提高起重机作业时的起升高度,汽车起重机在伸缩主臂的基础上引入了固定副臂,使得主副臂结构的长细比变大,导致结构的非线性变形更加显著。为准确计算主副臂结构几何非线性变形的理论解,基于小变形理论,采用微分方程法,推导考虑轴力二阶效应的臂架挠度表达式。利用ANSYS软件对主副臂结构进行几何非线性仿真分析,并将理论解与仿真解进行对比分析,二者误差均在1%以内。分析结果表明:推导的主副臂结构挠度表达式是正确性,可以用于主副臂结构的几何非线性变形计算。In order to increase the lifting height of the crane during operation,the truck crane introduces a fixed jib on the basis of the telescopic main boom,which makes the slenderness ratio of the main jib structure larger,resulting in more significant nonlinear deformation of the structure.So as to accurately calculate the theoretical solution of the geometric nonlinear deformation of the main and jib structure,based on the small deformation theory,the differential equation method is used to derive the boom deflection expression considering the second-order effect of axial force.Use ANSYS software to perform geometric nonlinear simulation analysis on the main and jib structure,the theoretical solution and the simulation solution are compared and analyzed,and the errors of both are within 1%.The analysis results show that the deduced deflection expression of the main and jib structure is correct and can be used to calculate the geometric nonlinear deformation of the main and jib structure.

关 键 词：汽车起重机 主副臂结构 伸缩主臂 固定副臂 几何非线性 

分 类 号：TH218[机械工程—机械制造及自动化]