合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2015年
7期
978-983
,共6页
不平度%自回归模型%时域模型%永久变形%损伤评价
不平度%自迴歸模型%時域模型%永久變形%損傷評價
불평도%자회귀모형%시역모형%영구변형%손상평개
road roughness%auto regressive(AR) model%time-domain model%permanent deformation%damage evaluation
不平整路面能够引起较大动荷载,动荷载的激励又使路面不平度增加,该互相促进过程使得路面破坏在不断加大,因此研究车辆动载对路面的损伤具有重要意义。永久变形作为路面的主要病害,对路面不平度和行车舒适性有较大影响。文章用自回归(auto regressive ,AR)模型模拟路面随机激励的时域模型,并应用在建立的1/2车辆模型中,求解汽车在不平整路面的振动响应量;根据“四次方定律”提出了车辆动载对路面永久变形损伤的评价指标,并在不同路面等级、不同车速等情况下研究车辆动载对路面永久变形损伤情况。
不平整路麵能夠引起較大動荷載,動荷載的激勵又使路麵不平度增加,該互相促進過程使得路麵破壞在不斷加大,因此研究車輛動載對路麵的損傷具有重要意義。永久變形作為路麵的主要病害,對路麵不平度和行車舒適性有較大影響。文章用自迴歸(auto regressive ,AR)模型模擬路麵隨機激勵的時域模型,併應用在建立的1/2車輛模型中,求解汽車在不平整路麵的振動響應量;根據“四次方定律”提齣瞭車輛動載對路麵永久變形損傷的評價指標,併在不同路麵等級、不同車速等情況下研究車輛動載對路麵永久變形損傷情況。
불평정로면능구인기교대동하재,동하재적격려우사로면불평도증가,해호상촉진과정사득로면파배재불단가대,인차연구차량동재대로면적손상구유중요의의。영구변형작위로면적주요병해,대로면불평도화행차서괄성유교대영향。문장용자회귀(auto regressive ,AR)모형모의로면수궤격려적시역모형,병응용재건립적1/2차량모형중,구해기차재불평정로면적진동향응량;근거“사차방정률”제출료차량동재대로면영구변형손상적평개지표,병재불동로면등급、불동차속등정황하연구차량동재대로면영구변형손상정황。
T he rough pavement can impose dynamic load ,and the impact of dynamic load can increase the roughness of pavement surface ,this mutual promotion progress increases the road damage contin-uously ,so the study of the damage caused by vehicle dynamic load is of significance .As the main damage of pavement ,permanent deformation has larger influence on the road roughness and riding comfort .In this paper ,auto regressive(AR) model is used to simulate the random road excitation in time-domain ,and it is applied to the half-vehicle model for solving the vibration responses of vehicles on the rough pavement .Based on the fourth power theory ,a new evaluation index of road permanent deformation damage due to the vehicle dynamic load is put forward ,and this evaluation index is used to study the damage condition at different highway levels and speeds of vehicle .