基于ANSYS nCode的转向器蜗杆疲劳断裂分析  

Fatigue and Fracture Analysis of Steering Gear Worm Based on ANSYS nCode

作　　者：余明果 龙婷 蔡皓 刘冠麟 YU Mingguo;LONG Ting;CAI Hao;LIU Guanlin(Hunan Oil Pump Co.,Ltd.,Hengdong,Hunan 421400,China;Hunan Industry Polytechnic,College of Changsha,Hunan 410007,China)

机构地区：[1]湖南机油泵股份有限公司,湖南衡东421400 [2]湖南工业职业技术学院,湖南长沙410007

出　　处：《汽车零部件》2024年第2期1-5,20,共6页Automobile Parts

摘　　要：基于ANSYS nCode联合仿真模拟蜗轮蜗杆啮合,研究分析转向器蜗杆强度、疲劳寿命与损伤值,由仿真结果可以看出蜗杆主要失效为塑性应变引起的低周疲劳断裂,且齿根处易在双向弯曲拉应力作用下产生应力集中及裂纹,继而扩展为蜗杆底径疲劳断裂。疲劳试验结果表明,断裂面贝纹线清晰可见,呈典型的双向弯曲疲劳断裂特征。仿真结果与试验结果基本吻合,验证了仿真与理论分析的准确性。Based on ANSYS nCode co-simulation to simulate the meshing of worm and gear,and study the strength,fatigue life and damage value of the steering gear worm.The simulation result shows that the main failure mode of the worm is low-cycle fatigue fracture caused by plastic strain,and stress concentration and cracks are prone to occur at the tooth root under bidirectional bending tensile stress,which then extends to fatigue fracture at the bottom diameter of the worm.Fatigue test result shows that clear macroscopic surface waviness can be seen at the fracture site,showing typical bidirectional bending fatigue fracture characteristics.The simulation result is basically consistent with experimental result,verifying accuracy of both simulation and theoretical analysis.

关 键 词：ANSYS nCode 转向器 疲劳寿命 疲劳试验 

分 类 号：U463.43[机械工程—车辆工程]