摘要
跨座式轻轨轨道采用简支梁结构 ,铸钢支座需承受所有荷载 ,其强度将对轻轨交通产生决定性的影响。由于铸钢支座结构的特殊性和受载的复杂性 ,对其进行应力分析 ,确保轻轨安全 ,有极其重要的意义。通过对铸钢支座的有限元分析 ,建立了支座的三维有限元模型 ,分析支座承受的荷载及受力边界条件 ,得到接触应力和综合应力计算结果。为验证理论分析结果 ,对支座进行了疲劳试验 ,试验研究表明 ,有限元分析结果和试验结果吻合良好 。
In design of light railcar used freely supported beam, the cast steel pedestals will bear complex loads, which include weight, acceleration and wind, etc. Because of pedestals' peculiarity and complexity, the strength of the pedestals play an important role in safety of light railcar. So it's necessary to analyze their stress and deformation in order to insure safety of light railcar. Up to now, finite element analysis is still the most effective means. By studying cast steel pedestal with finite element method, 3-D finite element models of fixed and kinetic pedestals were built, and the loads and boundary condition of pedestals were analyzed. By means of finite element analysis software, the contact and von mises stresses were obtained and deformation were resolved. As a result of analysis, the tow of pedestal can fulfill requirement of use in light railcar, the contact stress and von mises stress are not exceeded limit stress strength of materials. There is enough static strength for the structures of pedestals. For verifying theoretical analysis result, the fatigue test was carried out, with examining the testing points locating on the pedestals, the stress and deformation data were measured. By comparing between theoretical analysis and test data, the experimental results show calculated and testing results can meet the case well which assure the reliability of finite element analysis. But in the result, there are differences in deformations of them. The reason may be that boundary conditions and loads are not same between analysis and experiment.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第5期112-115,共4页
Journal of Chongqing University
关键词
支座
有限元分析
接触应力
pedestal
finite element analysis
contact stress
