基于轴头垂向加速度响应的车轮载荷推断方法研究
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摘要
介绍一种可替代六分力测量车轮垂向力载荷的测量新方法。通过对某轿车车轮的轴头垂向加速度和车轮垂向力时域信号进行分析,建立了轴头与车轮之间的线性模型。利用实时信号转化法和数理统计的方法对采集得到的车轮垂向载荷和轴头垂向加速度信号的实时数据进行统计分析,得到了在试车场道路下轴头垂向加速度和车轮垂向力信号之间的统计推断模型。以某车型轿车车轮进行验证试验,利用四立柱道路模拟试验台对该轿车车轮垂向载荷和轴头垂向加速度进行标定,并且进行了试车场道路载荷谱采集。通过对比采集到的车轮垂向力载荷谱与推断的车轮垂向力载荷谱,验证了该模型的有效性,研究结果表明:基于轴头加速度响应的车轮载荷估计方法切实可行。
A new load spectrum measuring method which can instead of the six-component measuring wheel was carried out in this paper. Through analysis the signal time-domain,a linear model between the axle head and the wheel was established. By using real-time signal transformation and mathematical statistics method,the collected load spectrum of vertical wheel load and the vertical acceleration of the axle head,an inference model were analyzed and discussed between the axle head and the wheel.The analysis method was validated by a reality car test. The wheel vertical load and axle head vertical acceleration calibrated was conducted by four pillars road simulation test bed,and the skid pad load spectrum was acquisitioned. Compared with the load spectrum of collected wheel vertical force and inference load spectrum of wheel vertical force,the correctness of model was verified. Finally,the results indicated that this inference method can replace the six-component measuring wheel for road load spectrum acquisition.
A new load spectrum measuring method which can instead of the six-component measuring wheel was carried out in this paper. Through analysis the signal time-domain,a linear model between the axle head and the wheel was established. By using real-time signal transformation and mathematical statistics method,the collected load spectrum of vertical wheel load and the vertical acceleration of the axle head,an inference model were analyzed and discussed between the axle head and the wheel.The analysis method was validated by a reality car test. The wheel vertical load and axle head vertical acceleration calibrated was conducted by four pillars road simulation test bed,and the skid pad load spectrum was acquisitioned. Compared with the load spectrum of collected wheel vertical force and inference load spectrum of wheel vertical force,the correctness of model was verified. Finally,the results indicated that this inference method can replace the six-component measuring wheel for road load spectrum acquisition.
引文
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[10]赵礼辉,郑松林,冯金芝.基于低载强化特性的疲劳寿命估计方法[J].机械工程学报,2013,49(8):115-122.ZHAO Li Hui,ZHENG Song Lin,FENG Jin Zhi.Fatigue life prediction based on simplifiedlow-amplitude-load strengthening model[J].Journal of Mechanical Engineering,2013,49(8):115-122(In Chinese).
[2]ZHAO Li Hui,ZHENG Song Lin,FENG Jin Zhi.Failure mode analysis of torsion beam rear suspension under service conditions[J].Engineering Failure Analysis,2014,36:39-48.
[3]刘宏璇.六分力测试方法研究[D].江苏:南京理工大学,2008:67-68.LIU Hong Xuan.The research method ofsix-component test[D].Nanjing:Nanjing University of Science&Technology[D].2008:67-68(In Chinese).
[4]成永刚,郑松林,冯金芝,等.轿车悬架耐久性试验载荷谱的优化研究[J].汽车工程,2009,31(5):467-470.CHENG Yong Gang,ZHENG Song Lin,FENG Jin Zhi,et al.A research on the optimization of load spectrum for durability test of a car suspension[J].Automotive Engineering,2009,31(5):467-470(In Chinese).
[5]Lee Yung Li.Fatigue testing and analysis[M].New York:Elsevier Butterworth Heinemann,2005:30-40.
[6]Decker M,Savaidis G..Measurement and analysis of wheel loads for design and fatigue evaluation of vehicle chassis components[J].Fatigue Fracture of Engineering Materials&Structures.2002,12(25):1103-1119.
[7]王习术,皮龙石纪雄,余寿文.载荷形式对疲劳寿命预测方法的影响[J].机械强度,2000,22(3):234-237.WANG Xi Shu,Kawagoshi N,YU Shou Wen.Effect of the methods of estimating fatigue life in the differential types of loading[J].Journal of Mechanical Strength,2000,22(3):234-237(In Chinese).
[8]韩愈,张元勤,石利敏,等.基于用户车辆伪损伤分布的两种强化路特性对比[J].汽车技术,2013,8:(39-45).HAN Yu,ZHANG Yuan Qin,SHI Li Min,et al.Comparsion of two rough roads on vehicle admage distribution of users[J].Automobile Technology,2013,8:39-45(In Chinese).
[9]李亮,宋健,文凌波,等.商用车驱动桥壳疲劳寿命的有限元仿真与实验分析[J].机械强度,2008,30(3):503-507.LI Liang,SONG Jian,WEN Ling Bo,et al.Finite element simulation and test for fatigue life of commercial vehicle driving axle housing[J].Journal of Mechanical Strength,2008,30(3):503-507(In Chinese).
[10]赵礼辉,郑松林,冯金芝.基于低载强化特性的疲劳寿命估计方法[J].机械工程学报,2013,49(8):115-122.ZHAO Li Hui,ZHENG Song Lin,FENG Jin Zhi.Fatigue life prediction based on simplifiedlow-amplitude-load strengthening model[J].Journal of Mechanical Engineering,2013,49(8):115-122(In Chinese).