摘要
针对某型电动挖掘机的乘员防护,提出使用基于等效静态载荷法的拓扑优化方法设计落物保护装置(Falling Object Protective Structures,FOPS)。首先,使用基于位移等效原则的等效静态载荷法,将动态非线性碰撞过程简化为多工况条件下的静态非线性变形过程。随后,提出使用加权系数法,将动态非线性拓扑优化简化为多工况条件下的静态非线性拓扑优化,可显著提高拓扑优化的计算速率和收敛性。最后,基于拓扑优化结果设计FOPS,并按照GB/T 17771—2010进行仿真试验分析。结果表明,新设计的FOPS无须额外加强即可满足乘员落物保护要求,且FOPS的总质量减轻了49.8 kg,这对降低工程机械的采购和使用成本,以及满足节能减排具有积极意义。
A new falling object protective structures(FOPS)was designed by a topology optimization method based on the equivalent static load method to improve the safety of the operator of an electric excavator.Firstly,the dynamic and nonlinear crush process is simplified into multiple static and nonlinear deformation processes based on equivalent displacement.Secondly,the dynamic and nonlinear topology optimization was transformed into static and nonlinear topology optimization involving multiple load cases by the weighting coefficient method.The computational cost was saved and the convergence was improved.Finally,a new FOPS based on the topology optimization result was numerically validated based on the GB/T 17771—2010.The results show that the new FOPS can meet the safety regulation without additional protective grill and the total mass of the FOPS is reduced by 49.8 kg which are positive to save the costs of procurement and operating and reduce the fuel consumption.
作者
马超
鹿鹏程
赵曰贺
张行
仇文宁
MA Chao;LU PengCheng;ZHAO YueHe;ZHANG Xing;QIU WenNing(School of Intelligent Manufacturing,Jiangsu Vocational Institute of Architectural Technology,Xuzhou 221116,China;School of Automotive Studies,Tongji University,Shanghai 201804,China)
出处
《机械强度》
CAS
CSCD
北大核心
2024年第2期388-394,共7页
Journal of Mechanical Strength
基金
江苏省高等学校基础科学(自然科学)研究面上项目(21KJB510038)
江苏省新能源工程装备工程技术研究开发中心,徐州市科技项目(KC21040)资助。
关键词
拓扑优化
等效静态载荷法
电动挖掘机
落物保护装置
Topology optimization design
Equivalent static load method
Electric excavator
Falling object protective structures
