基于液阻悬置的振动压路机驾驶室振动特性研究
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摘要
为评价液阻悬置系统对驾驶室振动特性响应的影响,基于车辆动力学理论及车轮-变形地面接触模型,建立了某振动压路机的非线性动力学模型。以驾驶员座椅垂向振动、驾驶室俯仰角和侧倾角加权加速度均方根值(RMS)为评价指标,基于Matlab/Simulink对所建整车非线性动力学模型进行数值仿真。对不同阻尼参数及布置方案的仿真分析表明,液阻悬置系统的低频高刚度特性对隔离低频振动传递和抑制驾驶室晃动有更好的效果。在转场工况下,相比传统橡胶隔振系统,采用液阻悬置系统可显著降低驾驶员座椅垂向振动及驾驶室俯仰和侧倾晃动,其加权加速度均方根值分别降低了20. 8%,24. 6%和57. 1%;相同条件下,车辆作业工况下上述振动响应分别降低了17. 9%,21. 4%和57. 4%。
In order to evaluate the influence of hydraulic mount suspension system on vibration response of cab,a nonlinear dynamic model of a vibratory roller was established based on vehicle dynamics theory and wheel-deformation ground contact model. The weighted root mean square( RMS) of acceleration responses of driver's seat vertical vibration,cab's pitch and roll vibrations were chosen as evaluation indexes. The nonlinear dynamic model of the vehicle was simulated numerically based on the MATLAB/Simulink. The simulation results of different damping parameters and arrangement schemes show that the hydraulic mount has better effect on isolating low frequency vibration transmission and restraining cab shaking. Compared with the traditional rubber mount,the vertical vibration of the driver's seat and the cab's pitch and roll angle can be significantly reduced based on hydraulic mount. The weighted RMS values of the vertical driver 's seat,the cab 's pitch and roll angle greatly decreased by 20. 8%,24. 6%,and 57. 1% under transfer conditions and by 17.9%,21. 4%,and 57. 4% under the working condition.
In order to evaluate the influence of hydraulic mount suspension system on vibration response of cab,a nonlinear dynamic model of a vibratory roller was established based on vehicle dynamics theory and wheel-deformation ground contact model. The weighted root mean square( RMS) of acceleration responses of driver's seat vertical vibration,cab's pitch and roll vibrations were chosen as evaluation indexes. The nonlinear dynamic model of the vehicle was simulated numerically based on the MATLAB/Simulink. The simulation results of different damping parameters and arrangement schemes show that the hydraulic mount has better effect on isolating low frequency vibration transmission and restraining cab shaking. Compared with the traditional rubber mount,the vertical vibration of the driver's seat and the cab's pitch and roll angle can be significantly reduced based on hydraulic mount. The weighted RMS values of the vertical driver 's seat,the cab 's pitch and roll angle greatly decreased by 20. 8%,24. 6%,and 57. 1% under transfer conditions and by 17.9%,21. 4%,and 57. 4% under the working condition.
引文
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[2]阮文廉.振动压路机驾驶室液阻隔振系统研究与半主动控制[D].南京:东南大学,2018.
[3]HE S,SINGH R.Discontinuous compliance nonlinearities in the hydraulic engine mount[J].Journal of Sound and Vibration,2007,307(3/4/5):545-563.
[4]OHADI A R,MAGHSOODI G.Simulation of engine vibration on nonlinear hydraulic engine mounts[J].Journal of Vibration and Acoustics,2007,129(4):2227-2236.
[5]TIKANI R,VAHDATI N,ZIAEI-RAD S,et al.A new hydraulic engine mount design without the peak frequency[J].Journal of Vibration and Control,2011,17(11):1644-1656.
[6]上官文斌,宋志顺,张云清,等.多惯性通道型液阻悬置动态特性的实测与分析[J].振动工程学报,2005(3):318-323.
[7]张云侠.液阻悬置动态特性仿真与试验研究[D].上海:上海交通大学,2007.
[8]ADAM D,KOPF F.Theoretical analysis of dynamically loaded soils[C].Paris:Proceed of ETC 11 Committee of ISSMGE,2000:3-16.
[9]BEKKER M G.Introduction to terrain-vehicle systems:Part 1:The terrain.Part 2:The vehicle[M].Michigan:University of Michigan Press,1969:16-32.
[10]KORDESTANI A,RAKHEJA S,PAZOOKI A,et al.Analysis of ride vibration environment of soil compactors[J].SAE International Journal of Commercial Vehicles,2010,3(1):259-272.
[11]WONG J Y.Terramechanics and off-road vehicles[M].Amsterdam:Elsevier,1989:162-178.
[12]NGUYEN V,ZHANG J,LE V,et al.Vibration analysis and modeling of an off-road vibratory roller equipped with three different cab's isolation mounts[J].Shock and Vibration,2018(1868):1-17.