摘要
针对某汽车驱动桥壳强度性能、模态性能和刚度性能难以获取的问题,基于驱动桥壳强度分析原理模型,采用有限元方法对该驱动桥壳进行有限元建模,根据实际工况对驱动桥壳进行约束和加载,其分析结果表明在垂向跳动工况时,驱动桥壳的最大应力超过其材料屈服,位于桥壳与板簧支座的焊缝连接处,不满足设计要求。通过将驱动桥壳厚度增厚,同时增大桥壳的过渡圆弧半径,改进之后驱动桥壳的最大应力有所降低并且小于材料许用应力,满足强度性能要求。模态分析结果表明,驱动桥壳的前三阶约束频率均大于发动机怠速频率,能够避免发生共振风险,满足模态性能要求。刚度分析结果表明,驱动桥壳的垂向每米轮距最大位移小于国家规范要求值,满足刚度性能要求。因此改进之后的驱动桥壳能够同时满足强度、模态和刚度性能要求。
Aiming at the problem of obtaining the strength,modal and stiffness performance of a truck driving axle,the finite element model of driving axle was established based on analysis principle model,the drive axle was constrained and loaded baed on actual conditions.The strength analysis results showed that the maximum stress of drive axle exceed the material yield in working condition of vertical jump,it located in the bridge shell and plate spring bearing weld joint,it didn’t meet the design requirements.The maximum stress of drive axle was decreased and less than the material allowable stress by increasing the thickness of the drive axle housing and increasing the transition arc radius of the axle housing,so it meet the strength requirements.The modal analysis results showed that the first third restraint frequencies of the drive axle were greater than the engine idle frequency,the risk of resonance would be avoided,so it meet the modal requirements.The stiffness analysis results showed that the maximum vertical displacement per meter was less than the national standard,so it meet the stiffness requirements.The drive axle could meet the requirements of strength,modal and stiffness after optimization.
作者
丁文敏
DING Wen-min(Jiangling Motors Corporation Limited,Jiangxi Nanchang330001,China)
出处
《机械设计与制造》
北大核心
2019年第9期269-272,共4页
Machinery Design & Manufacture
关键词
驱动桥壳
仿真
强度
模态
刚度
Driving Axle Housing
Simulation
Strength
Modal
Stiffness
