Driving Dynamic Characteristics of Multi-Axle Special Vehicles in Shortage of Tires

doi:10.16183/j.cnki.jsjtu.2021.236

Abstract

Abstract:

In order to investigate the driving characteristics of multi-axis special vehicle under the limit condition of missing tires, a five-axis special vehicle dynamics simulation test model including vehicle parameters, power transmission and braking system, axle and suspension system, steering system, and tire system was established based on the vehicle dynamics software TruckSim. Focusing on the analysis of the effect of tire deficiency and based on the tire six component test, the simulation test model of tire parameter was modified and the 0—80—0 km/h linear acceleration brake comfort simulation test and double line operating stability simulation test were conducted to study the smooth features and stability characteristics under the condition of tire deficiency at different positions. Based on the deviation of the centroid of the vehicle, the maximum number of missing tires at different driving speeds was analyzed, and the tire layout methods as well as the degree of influence of each axle tire on the vehicle at different driving speeds were proposed. The results show that the multi-axle special vehicle has the limit condition of driving under the condition of tire deficiency, and the tire deficiency at different positions has little effect on the driving speed of the vehicle. The influence of each axle tire on the driving of this type of vehicle is ranked in order of importance, which are the first axle, the fifth axle, the third axle, the second axle, and the fourth axle. When the vehicle travels at 50 km/h, 30 km/h, and 20 km/h, the maximum numbers of missing tires are 1, 2, and 3, respectively. This paper can provide theoretical support for the assessment of driving safety of multi-axle special vehicles.

Key words: multi-axle special vehicle, tire deficiency, vehicle modeling, simulation test, cetroid offset

CLC Number:

U461

HUANG Tong, GAO Qinhe, LIU Zhihao, WANG Dong. Driving Dynamic Characteristics of Multi-Axle Special Vehicles in Shortage of Tires[J]. Journal of Shanghai Jiao Tong University, 2023, 57(3): 335-344.

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簧载质量/kg	长度/ mm	宽度/ mm	高度/ mm	质心距离坐标原点距离/mm				转动惯量/(kg·m^-2)
簧载质量/kg	长度/ mm	宽度/ mm	高度/ mm	纵向	横向	垂向		绕x轴	绕y轴	绕z轴
43720	12900	2460	2310	4470	0	1080		184500	511500	429500

侧倾惯量/ (kg·m^-2)	俯仰惯量/ (kg·m^-2)	偏转惯量/ (kg·m^-2)	惯性积/(kg·m²)				回转半径/m
侧倾惯量/ (kg·m^-2)	俯仰惯量/ (kg·m^-2)	偏转惯量/ (kg·m^-2)	绕xy平面	绕xz平面	绕yz平面		绕x轴	绕y轴	绕z轴
184500	511500	429500	0	2660	0		2.054	3.420	3.134

名称	最大速度/ (km·h^-1)	最大速度对应时间/s
完备轮胎	80	73.825
缺一桥右胎	80	87.900
缺二桥右胎	80	73.950
缺三桥右胎	80	87.250
缺四桥右胎	80	73.700
缺五桥右胎	80	77.700