Research on Effect of Variation Coefficient of Nonlinear Suspension System of Shock Absorber Damping Values on Vehicle Vibration
-
摘要: 以MATLAB/SIMULINK为研究平台,搭建了包括车身垂直,俯仰和侧倾的七自由度非线性整车分析模型,讨论了汽车在随机路面谱激励下,非线性悬架系统对于整车振动的影响,并通过实车试验验证了所分析结果的正确性。论文详细分析了悬架阻尼非线性特性对车身总加权振动加速度均方根值的影响规律,研究结果表明:不同的复原行程阻尼值变化系数nr和压缩行程阻尼值变化系数nc会不同程度的影响整车的振动,较小的变化系数会增大车身总加权振动加速度均方根值,而过大的变化系数对于整车平顺性并无较大改善。研究结果还表明变化系数相同的双向阻尼值变化系数nrc和ncr对整车振动影响很小。所开展的阻尼非线性对车身加权加速度振动响应影响的研究规律研究,考虑了对人体较为敏感的水平振动的影响,对于改善整车平顺性的悬架系统设计有一定的指导作用。Abstract: A seven degree of freedom (7-DOF) nonlinear vehicle model which included vertical, pitch and roll motions were built in MATLAB/SIMULINK, the nonlinear effects of the shock absorber on the vehicle under the random excitation was discussed. The vehicle test results proved that the analysis were correct. Then the influences of the nonlinear shock absorber damping on the vehicle total weighted RMS vibration acceleration was studied. The results show that different rebound stroke damping variation coefficient nr and compression stroke damping variation coefficient nc will affect vehicle vibration on varying degrees, and small variation coefficient will increase the total weighted RMS vibration acceleration, while large variation coefficient do not improve the ride comfort. At the same time, the results show that the same variation coefficients of the double-side damping value nrc and ncr have little effect on the vehicle vibration. This paper considered the sensitive direction to human body, it provides a guidance to design a good ride comfort vehicle suspension.
-
Key words:
- ride comfort /
- 7-DOF /
- mathematical models /
- nonlinear analysis /
- damping
-
[1] 秦玉英.汽车行驶平顺性建模与仿真的新方法研究及应用[D].长春:吉林大学,2009 Qin Y Y. New methods of modeling and simulation and their applications to automobile ride comfort[D]. Changchun:Jilin University, 2009(in Chinese) [2] 李朝峰.车辆平顺性评价方法及试验研究[D].沈阳:东北大学与动,2007 Li C F. Research on evaluation method and experiment of automobile riding quality[D]. Shenyang:Northeastern University, 2007(in Chinese) [3] Worden K, Hickey D, Haroon M, et al. Nonlinear system identification of automotive dampers:A time and frequency-domain analysis[J]. Mechanical Systems and Signal Processing, 2009,23(1):104-126 [4] Ibrahim R A. Recent advances in nonlinear passive vibration isolators[J]. Journal of Sound and Vibration, 2008,314(3-5):371-452 [5] 卢凡.基于悬架非线性特性的车辆振动状态观测算法研究[D].北京:北京理工大学,2014 Lu F. Study on vehicle vibration state observation algorithm based on the nonlinearity of suspension[D]. Beijing:Beijing Institute of Technology, 2014(in Chinese) [6] 刘刚,陈思忠,王文竹,等.越野车油气悬架的建模与试验研究[J].汽车工程,2015,37(8):936-940 Liu G, Chen S Z, Wang W Z, et al. Modeling and experimental study on the hydro-pneumatic suspension of off-road vehicles[J]. Automotive Engineering, 2015,37(8):936-940(in Chinese) [7] Ibrahim R A. Recent advances in nonlinear passive vibration isolators[J]. Journal of Sound and Vibration, 2008,314(3-5):371-452 [8] Rajalingham C, Rakheja S. Influence of suspension damper asymmetry on vehicle vibration response to ground excitation[J]. Journal of Sound and Vibration, 2003,266(5):1117-1129 [9] 赵亮.车辆悬架系统中新减振元件设计和减振控制算法研究[D].长沙:湖南大学,2008 Zhao L. Design of a new damp element and investigation on control algorithm of reducing vibration in vehicle suspension system[D]. Changsha:Hunan University, 2008(in Chinese) [10] 姜鹏.汽车悬架系统的仿真分析与参数优化设计[D].杭州:浙江大学,2006 Jiang P. The simulation study and parameter optimization on vehicle suspension system[D]. Hangzhou:Zhejiang University, 2006(in Chinese) [11] 梁新成,张军,代鑫,等.微型轿车七自由度模型的仿真分析与试验研究[J].车辆与动力技术,2010,(2):41-45 Liang X C, Zhang J, Dai X, et al. Study on simulation and test for a seven DOF model of a mini car[J]. Vehicle & Power Technology, 2010, (2):41-45(in Chinese) [12] 米奇克,瓦伦托维茨.三汽车动力学[M].陈荫三,余强,译.北京:清华大学出版社,2009 Mitschke M, Wallentowitz H. Dynamik der Kraftfahrzeuge[M]. Chen Y S, Yu Q, trans. Beijing:Tsinghua University Press, 2009(in Chinese) [13] 陈鹏飞.十七自由度车辆动力学仿真模型的研究[D].武汉:华中科技大学,2011 Chen P F. The modeling and simulation of seventeen-degree-of-freedom vehicle[D]. Wuhan:Huazhong University of Science and Technology, 2011(in Chinese) [14] 杨春华.车辆乘坐舒适性的试验与性能匹配研究[D].上海:上海交通大学与力,2012 Yang C H. Performance application and validation to vehicle riding comfort[D]. Shanghai:Shanghai Jiao Tong University, 2012(in Chinese) [15] Sekulic' D, Dedovic' V, Rusov S, et al. Analysis of vibration effects on the comfort of intercity bus users by oscillatory model with ten degrees of freedom[J]. Applied Mathematical Modelling, 2013,37(18-19):8629-8644 [16] Silveira M, Pontes B R Jr, Balthazar J M. Use of nonlinear asymmetrical shock absorber to improve comfort on passenger vehicles[J]. Journal of Sound and Vibration, 2014,333(7):2114-2129 [17] 毕凤荣,勾新刚,吴华杰,等.减振器非线性阻尼对车身振动的影响分析[J].振动工程学报,2002,15(2):156-161 Bi F R, Gou X G, Wu H J, et al. Influence of nonlinear damping of shock absorber on vibration of automobile body[J]. Journal of Vibration Engineering, 2002,15(2):156-161(in Chinese) [18] Verros G, Natsiavas S, Papadimitriou C. Design optimization of quarter-car models with passive and semi-active suspensions under random road excitation[J]. Journal of Vibration and Control, 2005,11(5):581-606 [19] 中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T4970-2009汽车平顺性试验方法[S].北京:中国标准出版社,2010 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China. GB/T 4970-2009 Method of running test-automotive ride comfort[S]. Beijing:The Standards Press of China, 2010(in Chinese)
点击查看大图
计量
- 文章访问数: 207
- HTML全文浏览量: 31
- PDF下载量: 8
- 被引次数: 0