摘要
车架作为汽车起重机的重要承载部件,其承载能力对汽车起重机的整车性能有很大影响。本文以55 t汽车起重机车架为研究对象,在SolidWorks中建立参数化模型并导入Workbench中对车架进行有限元分析,计算其极限工况下的应力、变形以及模态。通过参数敏感性分析得到各参数对优化目标的敏感度并确定合理的设计变量。构建以筋板厚度和位置为设计变量的响应面模型,以车架的许用应力为约束条件,基于多目标遗传算法对其进行多目标优化。得到优化结果后对其进行分析确定其合理性。结果表明,优化后的车架满足强度与刚度要求,质量减小了6.3%,第一阶固有频率提高了4.9%。
The crane frame,as an important load-bearing component of a truck crane,its performance has a great influence on the performance of the truck crane.This paper takes the 55t truck crane frame as the research object.A parametric model is established in SolidWorks and imported into Workbench for finite element analysis of the frame to calculate the stress,deformation and modal frequency of the frame under extreme conditions.Taking the first-order natural frequency and total mass of the frame as the optimization target,the sensitivity of each parameter to the optimization target is obtained through parameter sensitivity analysis and reasonable design variables are determined.A response surface model with the thickness and position of the tendon plate as the design variables is constructed,and the multi-objective genetic algorithm is adopted to conduct the multi-objective optimization on the model under the constraint of the permissible stresses of the frame.After getting the optimized result,the analysis is conducted to determine its validity.The results show that the optimized frame meets the performance requirements and its weight reduced by 7%and the first-order natural frequency increased by 6%.
作者
孙丰科
高顺德
徐金帅
奚传峰
郭二棒
SUN Fengke;GAO Shunde;XU Jinshuai;XI Chuanfeng;GUO Erbang(School of Mechanical Engineering,Dalian University of Technology,Dalian 116025,China;Department of Engineering Mechanics,Dalian University of Technology,Dalian 116025,China)
出处
《机械》
2022年第10期67-73,共7页
Machinery
关键词
起重机车架
灵敏度分析
响应面
优化设计
crane frame
sensitivity analysis
response surface
optimization design
