基于多轴道路模拟激励谱的摩托车车架虚拟试验方法  

Virtual test method for motorcycle frame based on multi-axes road simulation using excitation spectrum

作　　者：邹喜红[1,2] 熊锋[1] 袁冬梅[3] 易鹏 

机构地区：[1]重庆理工大学汽车零部件制造及检测技术教育部重点实验室,重庆400054 [2]重庆建设摩托车股份有限公司,重庆400054 [3]重庆理工大学机械工程学院,重庆400054 [4]重庆市科学技术研究院,重庆400054

出　　处：《农业工程学报》2014年第15期39-45,共7页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(51205432);国家科技支撑计划(2012BAH32F01);重庆市科技攻关计划项目(cstc2011ggB0030;CSTC2011ggB60010;CSTC2010CF6021);重庆理工大学研究生创新基金资助项目(YCX2013201)

摘　　要：摩托车车架的疲劳可靠性是摩托车整车最重要的性能之一,为了对摩托车车架的疲劳可靠性进行准确高效的分析和评价,提出了基于时频域误差加权和力-位移混合控制的摩托车车架多轴道路模拟试验方法,结合采集的实际行驶道路载荷谱和开发的车架多轴道路模拟试验台,采用时域和频域误差加权系数均为0.5的力-位移混合控制多轴道路模拟试验使摩托车车架实际行驶道路载荷谱模拟迭代精度达到93%,并提取了多轴道路模拟激励谱。基于摩托车车架多轴道路模拟试验系统,利用HYPERWORKS有限元分析软件和MSC.ADAMS多体动力学仿真软件,建立了摩托车车架刚柔耦合多轴道路模拟虚拟试验平台,以多轴道路模拟激励谱为输入进行了仿真分析,并采用多轴道路模拟试验进行了结果验证,从而建立了基于多轴道路模拟激励谱的摩托车车架虚拟试验方法。结果表明,仿真结果和试验结果在时频域中趋势和幅值都吻合很好,时域曲线几乎重合,只是频域曲线在13 Hz和24 Hz附近幅值略有差异,但频域曲线均方根值误差均在10%之内,基于多轴道路模拟激励谱的摩托车车架虚拟试验方法能够对摩托车车架疲劳可靠性进行高效准确的考核。Motorcycle frame is the key load-bearing part of vehicle, its fatigue reliability, stiffness, strength, quality and other factors play a decisive role in vehicle＇s control stability and occupant comfort. New frame products must pass the reliability test before put into market. However, current frame fatigue reliability tests mainly use road test and testing ground test, which are time-energy consuming and the results are easily affected by environmental factors; Indoor bench tests at present mainly use single axial single incentive or single axial multi incentive mode. The motorcycle frame installation and constraints on the vehicle are very complex, the actual driving loads are complicated and changeable, thus multi-axial loads on motorcycle frame due to road excitation during actual driving could not be simulated or simulation precision is low, prone to over or under test. While the computer simulation technology development provides a new solution to dynamic performance analysis and fatigue reliability evaluation of vehicles and their parts, which including complete 3D entity model building online, creating a virtual laboratory, a virtual running environment and realizing virtual test and evaluation. For accurate and efficient analysis and evaluation of motorcycle frame fatigue reliability, a multi-axes road simulation test method for motorcycle frame based on time-frequency domain error weighting and force-displacement hybrid control was put forward. A motorcycle frame multi-axes road simulation test bench was built with American MTS road simulation test device, which was arranged with two actuator input channels in horizontal axial and vertical axial. As the motorcycle frame multi-axes road simulation test system is a multiple input multiple output system, the remote parameter matrix control strategy was applied to iterate and reproduce actual driving load spectrum. As the frame front fork and shock absorber were substituted by rigid frame fixture, in the horizontal direction, the frame dynamic response wa

关 键 词：摩托车 数值模拟 试验 多轴道路模拟 激励谱 时频域误差加权 混合控制 

分 类 号：U467.3[机械工程—车辆工程]