长定子中低速磁浮列车悬浮架疲劳寿命分析

Fatigue life analysis of levitation chassis of long stator maglev vehicle

基于ANSYS Workbench软件建立长定子中低速磁浮列车悬浮架有限元模型,分析悬浮架在4种工况下的应力情况,确定疲劳关键部位。在4种工况下对关键部位的疲劳寿命进行计算。静悬浮工况下悬浮架的疲劳寿命最小为9.679年;正常行驶工况下悬浮架的疲劳寿命最小为3.53年;紧急制动工况下悬浮架的疲劳寿命最小为2.18年。结果表明:在静悬浮、正常行驶和制动状态下悬浮架的疲劳危险部位都位于左右两个支腿上横向弧板与竖板的连接处,其寿命偏小,有必要对其进行结构优化或局部重新设计。

Based on ANSYS Workbench the finite element model of the levitation chassis of long stator low-speed maglev train was established. The stress conditions of the levitation chassis under the four working conditions were analyzed and the fatigue key parts were determined. The fatigue life of the key parts was analyzed in the four conditions of calculation. The suspension＇ s fatigue life under the condition of static suspension for a minimum of 9. 679 years;the suspension＇ s fatigue life in normal driving conditions for a minimum of 3.53 years ;the suspension＇ s fatigue life under emergency braking for a minimum of 2.18 years. The results showed that：in the static levitation, normal driving, braking state suspension rack fatigue risk position of suspension frame fatigue dangerous parts are located around the two legs of the transverse arc plate and the vertical joints, and its life is too small, so it is necessary to carry on the optimization of the structure or redesign the local.