工程设计学报2018，Vol.25Issue(1)：79-84,93,7.DOI:10.3785/j.issn.1006-754X.2018.01.011
无轨伸缩式门式起重机接触部位的有限元分析
Research on contact problem of trackless telescopic gantry crane
摘要
Abstract
Nonlinear contact analysis can be closer to reality when dealing with contact problems, however,the complicated contact parameter setup,low computation efficiency and the computa-tion convergence with no guarantee,which make contact analysis difficult to be applied to engi-neering practice.Node coupling analysis is a linear analysis without convergence problem,so the node coupling analysis is superior to the contact analysis because of its lower computational ex-pense.In order to explore the differences in the application between the two models and study the feasibility of using the node coupling linear analysis instead of the nonlinear contact analysis,the trackless telescopic gantry crane with 12 ton lifting capacity was taken as the example,and the fi-nite element analysis software ANSYS was used to establish a contact model and a node coupling model.The influences of contact stiffness and friction coefficient on the calculation results was considered,and the equivalent stress differences of each contact part between two models were compared under the condition of telescopic leg extending.By comparing the computation results, it was found that the maximum equivalent stress of two models appeared at the crane frame where the lifting load was applied.Besides,there was no significant difference with the relative error was 1.3%.Furthermore,the equivalent stress value of each contact part had some differ-ences since the node coupling analysis neglected the friction coefficient,therefore,the relative er-ror can be reduced by selecting the appropriate friction coefficient in the contact model according to the relative sliding of the contact part.According to the results,considering the influence of relative sliding on the calculation results,node coupling analysis can simulate contact analysis fa-vorably,for models with no high precision or no relative slip of the contact area,a simplified ap-proach based on node coupling analysis can be used to replace contact analysis to improve compu-tational efficiency.关键词
伸缩式门式起重机/接触分析/有限元法/节点耦合Key words
telescopic gantry crane/contact analysis/finite element method/node coupling分类
机械制造引用本文复制引用
邓星,于兰峰,雷聪,徐江平,肖泽平..无轨伸缩式门式起重机接触部位的有限元分析[J].工程设计学报,2018,25(1):79-84,93,7.基金项目
国家自然科学基金资助项目(51675450) （51675450）
中央高校基本科研业务费专项资金资助项目(2682016CX031) （2682016CX031）
