摘要
文章介绍了以不锈钢材料作为侧墙结构进行设计的难点,并以出口非洲某国敞车为例介绍了不锈钢材料在敞车侧墙中的应用。结合T4003铁素体不锈钢焊接接头性能试验评估了不锈钢焊接接头的性能,试验结果表明:拉伸载荷时不锈钢焊接接头不焊修、焊修1次、焊修2次接头的抗拉强度值均大于母材的抗拉强度下限值;弯曲载荷时不锈钢焊接接头未出现裂纹,塑性很好。在此基础上采用有限元方法及刚度协调评估理论对敞车侧墙结构进行了设计、结构优化进而完成整车设计。采用TB/T 3550.2标准对整车开展强度试验验证并对关键测点进行了仿真试验对比,证明了数值模拟的可靠性。对不锈钢焊接接头的试验研究及不锈钢在车体结构优化中的应用探索,对以后不锈钢材料侧墙敞车开发具有一定的借鉴意义。
Taking the open wagon to be exported to an African country for example,this paper introduces the difficulties with the design of stainless steel side walls and the application of stainless steel materials in the side walls of open wagons.The properties of the stainless steel welded joints are evaluated in combination with the performance test of the welded joints on T4003 ferritic stainless steel,and test results show that the tensile strength of the stainless steel welded joints without repair welding,or with one-time repair welding or two-time repair welding operation respectively under tensile load is higher than the low limit of the base metal;the stainless steel welded joints show excellent plasticity without any cracking under bending load.On this basis,finite element method and rigidity coordination evaluation theory is allied in the design of the side wall structure of the open wagon,structure optimization and then the whole wagon design.Strength test and verification of the whole wagon as per TB/T 3550.2 standard and simulated test and comparison of the key measurement points prove the reliability of the numerical simulation.The experimental study of the stainless steel welded joints and the application of stainless steel in the structural optimization of car bodies is surely of some significance for reference in the development of stainless steel side-walled open wagons in the future.
作者
白从凯
袁国庆
代鲁平
王力争
陈建华
吴航宇
BAI Congkai;YUAN Guoqing;DAI Luping;WANG Lizheng;CHEN Jianhua;WU Hangyu(CRRC Shandong Co.,Ltd.,Jinan,Shandong 250022,China)
出处
《轨道交通材料》
2023年第4期51-54,共4页
MATERIALS FOR RAIL TRANSPORTATION SYSTEM
关键词
不锈钢
侧墙敞车
焊接性能
刚度协调
结构优化
试验验证
stainless steel
side wall of open wagon
welding property
rigidity coordination
structure optimization
