摘要
根据GB/T7031—2005对不同路面不平度系数下随机路面高程均方根值的要求,确定了白噪声输入拟合表达式.对速度相关参数e进行重新计算,针对e值的波动拟合出速度增益函数并建立完善的路面不平度时域模型.利用Matlab/Simulink对所建模型进行仿真并与标准路面等级的谱密度曲线进行对比,验证其正确性.结果表明：e值大小与速度相关与路面不平度系数无显著关系,速度较低时,e值有轻微波动;速度较高时,e值趋近于0.218;模型完善后,仿真生成的路面随机高程均方根值与路面分级标准间的误差为0.157%～1.730%,此路面不平度时域模型与传统白噪声时域模型相比,具有更高的准确度.
According to the requirements of GB/T 7031 -2005 to the root mean squaresurface under different road roughness coefficient , the fitting expression of white noise input was defined. After recalculating the speed-related e parameter , the perfect road surface roughness domain model established /ased on the fitting speed gain function for the fluctuation of e value. The spectracurves generated by Matlab/Simulink were compared with those of standard road grade to verify theproposed model. The simulation results show that the e value is related to the speed and has no significantrelationship with road roughness coefficient. At low speed , the e value fluctuates slightly , while it tends to 0. 218 at high speed. After perfecting the model , the error between root mean of rannom road elevation and road grading standard is from 0. 157% to 1 .730% , which shows that compared to the traditional timemodel of white noise , the proposed model has higher accuracy.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第5期503-506,524,共5页
Journal of Jiangsu University：Natural Science Edition
基金
国家自然科学基金资助项目(51575241)
国家青年科学基金资助项目(51305111)
江苏省"六大人才高峰"项目(2012-ZBZZ-030)
江苏大学工业中心大学生创新实践基金资助项目(ZXJG201514)
关键词
路面不平度
随机激励
时域模型
白噪声
仿真
road roughness
random excitation
time domain model
white noise
simulation
