某轻型客车真空盒支架断裂分析与研究
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摘要
以某轻型客车真空盒支架为研究对象,通过尺寸及安装拧紧力矩检查、材料分析、断口分析、模态分析及频率响应分析,确定了支架断裂的原因。通过对支架的结构优化,提高了强度及固有频率,使其满足设计要求。经过振动耐久台架试验、30 000 km的可靠性试验验证,证明了改进方案可以解决该支架断裂问题。
In this article, taking the vacuum box bracket of a light bus as the research object, the causes of bracket fracture are identified by dimension and installation-tightening torque check, material analysis, fracture analysis, modal analysis and frequency response analysis. Thanks to the structural optimization, the bracket's strength and natural frequency are improved, in order to meet the design requirements. The vibration-durability bench test and the reliability test of 30,000 kilometers prove that the problem of bracket fracture can be solved by the improved program.
In this article, taking the vacuum box bracket of a light bus as the research object, the causes of bracket fracture are identified by dimension and installation-tightening torque check, material analysis, fracture analysis, modal analysis and frequency response analysis. Thanks to the structural optimization, the bracket's strength and natural frequency are improved, in order to meet the design requirements. The vibration-durability bench test and the reliability test of 30,000 kilometers prove that the problem of bracket fracture can be solved by the improved program.
引文
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[11]尹辉俊,李峰,刘媛媛.某空压机车架随机振动响应分析[J].机械设计,2015,32(11):92-95.
[12]Lin J S,Yim K S.Application of random vibration test methods for automotive subsystems using power spectral density[C]//2000 SAE World Congress,2000:1-3.
[2]时辰.负载类支架优化设计方法[J].汽车实用技术,2016(9):71-75.
[3]郑伟刚,刘志军,杨宁.汽车转向泵支架的静态和模态分析[J].机械设计与制造,2014(6):182-184.
[4]柳国立,刘正勇,崔晓娟.商用车柴油机油底壳开裂问题分析及解决[J].汽车设计,2016(2):7-10.
[5]庞剑,谌刚,何华.汽车噪声与振动[M].北京:北京理工大学出版社,2006.
[6]郭维清.汽车蓄电池支架模态分析及结构拓扑优化[C]//中国汽车工程学会2016中国汽车工程学会年会论文集,北京:机械工业出版社,2016:1371-1373.
[7]谭辉,褚超美,梅超.汽车变速器壳体频率响应特性仿真分析研究[J].农业装备与车辆工程,2016,54(12):51-54.
[8]黄成刚,刘永超,唐述斌.汽车车身频率响应分析[J].湖北汽车工业学院学报,1999,13(4):25-29.
[9]方晶,郑松林,冯金芝,等.汽车制动硬管随机振动环境的模拟与分析[J].上海理工大学学报,2015,37(3):257-262.
[10]姜清松,吴道俊,王军,等.基于模态频率响应分析的半挂车车架的疲劳寿命计算[J].湖北汽车工业学院学报,2013,27(2):50-53.
[11]尹辉俊,李峰,刘媛媛.某空压机车架随机振动响应分析[J].机械设计,2015,32(11):92-95.
[12]Lin J S,Yim K S.Application of random vibration test methods for automotive subsystems using power spectral density[C]//2000 SAE World Congress,2000:1-3.