轨道高低不平顺激励下的车体振动仿真  

Simulation of vehicle vibration with excitation of rail height irregularity

作　　者：左言言[1] 常庆斌[1] 耿烽[1] 杨建[1] 

机构地区：[1]江苏大学振动噪声研究所,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2011年第6期647-651,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省自然科学基金资助项目(BK2009212);高等学校博士学科点专项基金资助项目(20103227110009)

摘　　要：为了得到轨道高低不平顺激励下的车体振动响应,并对车体振动情况做出评价,进而分析车辆的乘坐平稳性等级,首先建立了车体的垂向振动力学模型并列出运动微分方程,然后对轨道垂向不平顺进行了描述,并将轨道不平顺的垂向空间域功率谱转换为时频域功率谱,计算出轨道不平顺的位移时间序列,再利用Pro/E软件建立了车厢的三维模型,用动力学仿真软件SIMPACK建立轮轨模型与列车仿真模型.将垂向不平顺作为激扰函数,输入到轨道车体振动系统仿真模型中,通过计算得出车体在轨道高低不平顺激励下的垂向振动响应.根据时域响应对车辆的运行平稳性等级进行了评价,在频域分析了车辆的垂向振动加速度功率谱密度,参照我国列车平稳性指标,给出了车体的平稳性和振动性等级.The influence of track irregularity on vehicle body vibration was investigated to evaluate the vibration situation of vehicle body and analyze the stability level.A mechanical model for vertical vehicle body vibration was established to introduce motive differential equations.The track power spectrum in vertical space domain was transferred into the spectrum in time-frequency domain to establish 3D model of vehicle body by Pro/E software and wheel-rail model by SIMPACK.The train simulation model was also introduced by SIMPACK.The vertical vibration response of the vehicle body was calcuated with height irregularity as excitation function.Based on the vehicle response,the stability level of travelling vehicle was evaluated in time domain,and the composition of vehicle vibration acceleration power spectral density was analyzed in frequency domain.Referred Chinese standard of train stability,the performance grade of train stability and vibration were proposed.

关 键 词：车体 高低不平顺 轮轨 仿真 SIMPACK 

分 类 号：U211.3[交通运输工程—道路与铁道工程] U271.1[机械工程—车辆工程]