摘要
垂直桁架是桥梁检测车非常重要的受力构件,为获得某型桥梁检测车在工作过程中,垂直桁架发生玄杆局部变形的原因,对垂直桁架结构进行结构强度分析、优化和实验验证是很有必要的。建立垂直桁架的有限元模型,进行工作平台全伸和全缩不同角度工况的静强度分析。有限元结果表明:桥检车垂直桁架玄杆变形主要原因是玄杆受剪,且玄杆应力超过材料的屈服强度,最终导致玄杆变形。通过对实际样车的桁架变形部位进行应力测试试验,验证了有限元分析结果的正确性。为原结构桁架薄弱环节提出了结构改进方案。
The vertical truss is a very important component of the bridge inspection vehicle,in order to obtain a certain type of bridge inspection vehicles in the working process,The reason of the local deformation of the vertical truss,it is necessary to analyze the structural strength,optimization and experimental verification for vertical truss structure.The finite element model of the vertical truss is established,and the static strength of the working platform full stretch and full shrink at different angles are analyzed.the finite element results show that the main reason for the deformation of the vertical truss of the bridge inspection vehicles is that the rods are sheared,and the stress of the rod exceeds the yield strength of the material,eventually leading to deformation of the rod.The results of finite element analysis are verified by stress test in the deformation of the actual vehicle.The structure improvement scheme is proposed for the weak links of the original structural truss.
作者
李伟
张辉
LI Wei;ZHANG Hui(School of Mechanical Engineering,Zhengzhou University of Science&Technology,He’nan Zhengzhou 450064,China)
出处
《机械设计与制造》
北大核心
2018年第11期109-112,116,共5页
Machinery Design & Manufacture
基金
河南省科技厅资助项目(172102210533)
河南省科技厅科技攻关项目(182102210553)
关键词
桥检车
垂直桁架
玄杆
有限元分析
实验研究
优化
Bridge Inspection Vehicles
Vertical Truss
Rod
Finite Element Analysis
Experimental Study
Optimization
