摘要
为根据已知路面信息进行双轮辙路面不平度准确建模,提出一种基波递进加载的双轮辙路面不平度通用建模方法。将目标功率谱密度与离散带宽乘积的1/2次方以及左右轮辙相干函数的1/2次方分别作为基波信号,递进加载到3条独立白噪声标准载波得到相应调制波,并对调制波进行特定叠加得到双轮辙路面不平度。为进一步提高建模精度,将重构路面不平度的空间频率统计范围上限延长至10 m^(-1),并使计算离散频带区间带宽的倒数大于建模路面不平度的长度。除理论证明以外,还进行了基于指定数据的建模应用及基于实测路面数据的重构应用。结果表明:建模和重构路面不平度功率谱密度及相干函数与相应的目标值高度吻合,验证了基波递进加载建模方法的有效性。
To accurately model double-wheel ruts road surface irregularities based on known road surface data,a generalized modeling method using fundamental wave progression loading is proposed.The square root of the product of the target power spectral density and the discrete bandwidth,as well as the square root of the coherence function between the left and right wheel ruts,are employed as fundamental wave signals.These fundamental wave signals are progressively loaded onto three independent white-noise standard carriers to generate three mutually independent modulated waves.The modulated waves are then superimposed in a specific manner to obtain the double-wheel ruts road surface irregularities.To further improve modeling accuracy,the upper limit of the reconstructed spatial frequency range of the road surface roughness is extended to 10 m^(-1),ensuring the inverse of the discrete frequency band interval bandwidth exceeds the length of the modeled road surface irregularities.After theoretical validation,the method is applied to modeling with specified data and is rebuilt by employing measured road surface data.Results show the power spectral density and coherence function of both modeled and reconstructed road surface irregularities closely match the target values,validating the effectiveness of the fundamental wave progressive loading approach in accurate road surface irregularities modeling.
作者
陈士安
魏善门
张良城
吴俊杰
王骏骋
CHEN Shi’an;WEI Shanmen;ZHANG Liangcheng;WU Junjie;WANG Juncheng(School of Automobile and Traffic Engineering,Jiangsu University,Zhenjiang 212013,China;Zhejiang Gold Intelligent Suspension Corp,Wenzhou 325000,China;School of Mechanical Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China)
出处
《重庆理工大学学报(自然科学)》
北大核心
2025年第8期44-51,共8页
Journal of Chongqing University of Technology:Natural Science
基金
国家自然科学基金项目(52072158,52205135)。
关键词
汽车工程
路面不平度
载波调制
空间频率
相干与非相干函数
automotive engineering
road roughness
carrier modulation
spatial frequency
coherent and incoherent functions
