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电动汽车悬架系统振动特性研究 预览

Vibration Research of the Electric Vehicle Suspension System
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摘要 悬架系统的振动特性是衡量车辆性能的重要指标,影响着车辆的行驶平顺性和乘坐舒适性。本研究建立了前悬架系统二自由度振动模型,将车身垂直加速度、悬架动挠度和车轮相对动载作为振动分析响应量,在不同路面等级、不同速度和不同非簧载质量的条件下,用虚拟激励法进行研究分析。研究表明:随着路面等级的降低,车辆行驶速度越快,非簧载质量增加,则电动汽车的振动越强;在所研究的3个响应量中非簧载质量的增加对振动的影响较小;在0~5Hz内各响应量的功率谱密度均有显著变化,在2~3Hz内达到峰值。 The vibration performance of suspension system affect the vehicle’s stability and riding comfort, which are important indicators to measure the vehicle performance. In this paper, the two degree of freedom vibration model of the front suspension system is established. The vertical acceleration of the body, the dynamic deflection of the suspension and the relative dynamic load of the wheel are used as the response of the vibration analysis. The virtual excitation method is used for the study and analysis under the conditions of different pavement grade, different speed and different non spring load.The research show that the vibration of the electric car is stronger with the deterioration of the pavement grade, the faster the vehicle speed and the increase of the non spring load, the stronger the vibration of the electric vehicle;compared with the road level and speed, the sprung mass has lesser impact on the vibration;the power spectral density is changed significantly within 0 to 5 Hz, and reach the peak within 2 to 3 Hz.
作者 樊智敏 马永东 张秀文 FAN Zhimin;MA Yongdong;ZHANG Xiuwen(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)
出处 《青岛科技大学学报:自然科学版》 CAS 2019年第4期98-104,共7页 Journal of Qingdao University of Science and Technology:Natutral Science Edition
基金 山东省自然科学基金资助项目(ZR2018MEE014).
关键词 悬架系统 虚拟激励法 振动特性 功率谱密度 suspension system pseudo-excitation method vibration performance power spectral density
作者简介 樊智敏(1963-),男,教授.
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