悬索桥桥梁检查车力学性能分析

针对某高速公路上使用的桥梁检查车的设计和生产的实际需要,利用有限元分析软件,对设计完成的桥梁检查车的主体结构进行了力学性能分析。分别采用梁单元和三维实体单元建立了工作吊栏的有限元分析模型。按照检查车在实际使用时载荷的变化情况,归纳出了6种典型工况,计算了在6种工况下主体结构的静态应力和应变,获得了不同工况下的应力与位移的分布情况,及最大位移、最大应力出现的区域及分布规律。对主体结构在不同工况下进行了模态分析,获得了在不同工况下的前六阶固有频率。分析结果表明,检查车的强度和刚度完全符合设计要求,具有足够的安全系数;模态分析结果表明检查车不存在工作过程中的共振现象;分析结果可为桥梁检查车的结构设计与实际生产提供理论依据与技术支持。

Mechanics properties analysis on bridge inspection vehicle of suspension bridge

Aiming at the actual needs of the design and manufacture of bridge inspection vehicle used on a highway, using the finite element analysis software, the mechanical properties of the main structure of the bridge inspection vehicle designed to complete were analyzed. The finite element analysis model of the working basket was established by using the beam element and the three dimensional solid element. The static stress and strain of the main structure under six conditions were calculated respectively. The distribution of stress and displacement under different working conditions, the maximum displacement and the distribution of the maximum stress were obtained. The modal analysis of the main structure under different conditions was carried out. The first six order natural frequencies were obtained under different conditions. The analysis results show that the strength and stiffness of the bridge inspection vehicle are in full compliance with the design requirements, with adequate safety factor. The modal analysis result shows that there is no resonance in the working process of the bridge inspection vehicle. The results of the analysis provide some theoretical basis and technical support for the structural design and the actual manufacture of the bridge inspection vehicle. ABSTRACT FROM AUTHOR]