基于ANSYS/LS-DYNA的停放制动滑橇螺栓跌落强度分析  

Analysis of bolt drop strength of parking brake skid based on ANSYS/LS-DYNA

作　　者：张鑫枝 胡俊雄 周阳 马卫华[1] 王自力[1] ZHANG Xinzhi;HU Junxiong;ZHOU Yang;MA Weihua;WANG Zili(State Key Lab of Traction Power,Southwest Jiaotong University,Chengdu 610036,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,成都610036

出　　处：《振动与冲击》2023年第7期217-224,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(51875483);牵引动力国家重点实验室自主课题(2020TPL_T01和2020TPL_T04);西南交通大学国防科研培育种子基金项目(2682021GF008)。

摘　　要：中低速磁浮列车悬浮架各部件间主要通过螺栓进行联接,在列车悬浮失效跌落时,停放制动滑橇与托臂联接处的螺栓受到较大的剪切作用,存在结构安全风险。利用HyperMesh建立了悬浮架有限元模型,考虑了停放制动滑橇位置的螺栓联接及接触关系,基于ANSYS/LS-DYNA仿真了悬浮架不同速度下的跌落过程,计算了各接触对的接触力波动情况,分析了联接螺栓、滑橇键、滑橇安装座及托臂的应力变化及分布规律。结果表明:跌落碰撞瞬间各接触对的接触力达到峰值,然后在小幅波动过程中呈减小趋势;运动状态的悬浮架跌落时,各接触力远大于静悬落车工况,联接螺栓的应力显著增大,滑橇键、滑橇、滑橇安装座的最大等效应力超过了材料的屈服极限,存在结构安全风险,工程中需要注意及时检查。Suspension frame components of medium and low speed maglev train are mainly connected by bolts.When suspension of train fails to fall,bolts at connection positions between parking brake skid and corbel are subject to larger shear action,and there is a structural safety risk.Here,the finite element model of suspension frame was established by using the software HyperMesh considering bolt connection and contact relations at parking brake skid position.Dropping processes of suspension frame under different speeds were simulated based on ANSYS/LS-DYNA.Contact force fluctuations of various contact pairs were calculated.Stress changes and distribution laws of connection bolts,skid keys,skid mounting base and corbel were analyzed.The results showed that contact forces of various contact pairs reach peak values at the moment of drop impact,and then decreases in process of small fluctuation;when suspension frame in motion state falls,various contact forces are much larger than those under the working condition of static vehicle from suspension to dropping,stresses of connection bolts increase significandy,and maximum equivalent stresses of skid key,skid,and skid mounting base exceed yield limit of material to have structural safety risks,and require timely inspection in project.

关 键 词：中低速磁浮列车 悬浮架 盲孔螺栓 跌落 强度分析 

分 类 号：U237[交通运输工程—道路与铁道工程]