具有分数阶特性悬架的垂向振动特性研究  

Vertical Vibration Characteristics of Suspension with Fractional Order Characteristics

作　　者：邢武策 陈恩利 常宇健[3] Xing Wuce;Chen Enli;Chang Yujian(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Electrical and Electronic Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学机械工程学院,河北石家庄050043 [2]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043 [3]石家庄铁道大学电气与电子工程学院,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2021年第2期105-109,共5页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

摘　　要：选取含分数阶微分项的1/4车辆动力学模型为研究对象,应用拉氏变换法推导出车身加速度、轮胎动载荷和悬架动挠度3个性能指标的频响函数,分析了分数阶微分项参数对悬架振动特性的影响。结果表明,分数阶项参数会影响悬架振动幅频响应特性。应用数值方法计算出非线性悬架系统车身振动幅频响应曲线,研究发现振动幅值随分数阶微分项参数值的增加而减小,悬架动力学性能提高。In this paper,the 1/4 vehicle dynamics model with fractional micro items is selected as the research object.The frequency response functions of acceleration,dynamic load of tire and dynamic deflection of suspension were derived by Laplace transform,and the influence of fractional differential item parameters on suspension vibration characteristics was analyzed.The results show that the fractional order parameters affect the amplitude frequency response of suspension vibration.The response curve of vehicle body vibration amplitude frequency of nonlinear suspension system is calculated by numerical method.It is found that the vibration amplitude decreases with the increase of parameter value of fractional differential term,and the dynamic performance of suspension is improved.

关 键 词：分数阶微分 二自由度悬架 垂向动力学 

分 类 号：U461.1[机械工程—车辆工程]