路面不平度模型对车辆侧翻瞬态响应的影响分析  

Analysis of the Influence of Road Roughness Model on the Transient Response of Vehicle Rollover

作　　者：杨晨旭 路永婕[2] 王美晨 郑露峰 Yang Chenxu;Lu Yongjie;Wang Meichen;Zheng Lufeng(School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behaviour and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学机械工程学院,河北石家庄050043 [2]石家庄铁道大学省部共建交通工程结构力学行为与系统安全国家重点实验室,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2023年第4期88-94,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金面上项目(12072204);河北省自然科学基金面上项目(A2020210039)。

摘　　要：精准的路面不平度模型可以提高车辆在瞬态响应的估算精度。结合国标中的标准路面谱和路面形貌自相似性特点,利用傅里叶逆变换法和正方形细分法分别建立平整路面、二维路面和三维路面模型。在双移线、鱼钩工况和角阶跃典型工况下,对比分析不同路面不同平度模型下横向载荷转移率(LTR)、侧向加速度、横摆角速度和侧倾角4个瞬态响应的区别。其中三维路面模型对各响应影响最大,车辆侧翻时其各响应的数值达到侧翻阈值。验证了多维度路面模型建立的可行性,为车辆侧翻瞬态响应研究提供了理论基础。Accurate road roughness model can improve the estimation accuracy of vehicle transient response.In this paper,combined with the standard pavement spectrum and the self-similarity characteristics of pavement morphology in the national standard,the flat pavement,two-dimensional pavement and three-dimensional pavement models were established by using the inverse Fourier transform method and the square subdivision method.Under the typical working conditions of double lane change,fishhook and angle step,the differences of four transient responses of lateral load transfer rate(LTR),lateral acceleration,yaw rate and roll angle under different pavement and different flatness models were compared and analyzed.Among them,the three-dimensional road surface model had the greatest influence on each response,and the value of each response reached the rollover threshold when the vehicle rolled over.This paper verified the feasibility of the establishment of multi-dimensional road model,and provided a theoretical basis for the study of vehicle rollover transient response.

关 键 词：侧翻 瞬态响应 傅里叶逆变化法 正方形细分法 三维路面谱 

分 类 号：U415[交通运输工程—道路与铁道工程]