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dynamic impact factor Induced by Idling Vehicle-Bridge Coupling Vibration

Journal of Harbin Institute of Technology(New Series) 2022年第3期29卷 79-87页

作者： Lang Liu Jie Wang Hong Yang State Key Laboratory of Mountain Bridge and Tunnel Engineering Chongqing Jiaotong UniversityChongqing 400074China School of Civil Engineering Chongqing Jiaotong UniversityChongqing 400074China

To analyze the impact effect induced by vehicle-bridge coupling vibration during traffic congesting, hundreds and thousands of congestion scenarios consisting of various vehicle platoons were collected and used to develop vehicle models as well as traffic congestion load models. Furthermore, the idling vehicle-bridge coupling model was established by the finite element method and the congestion models were applied to calculate dynamic impact factors. Compared with the value specified in Chinese codes, the calculated values were 1.15-2.67 times as large as the latter, which indicates the impact factors caused by idling vehicle-bridge coupling under congestion situations were much larger than those in normal traffic conditions. As a result, a calibration factor of 1.7 was recommended for bridge design or evaluation when considering vehicle-bridge coupling vibration under heavy traffic congestion. The proposed analytical model, analysis method, and results could also be beneficial references to further investigation in this field.

关键词： dynamic impact factor vehicle-bridge interaction traffic congestion code provisions

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Nonlinear dynamic analysis of interaction between vehicle and road surfaces for 5-axle heavy truck

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Journal of Southeast University(English Edition) 2011年第4期27卷 405-409页

作者：黎文琼张建润刘晓波王园东南大学机械工程学院南京211189 太原科技大学机械工程学院

Based on the analysis of nonlinear geometric characteristics of the suspension systems and tires, a 3D nonlinear dynamic model of a typical heavy truck is established. The impact factors of dynamic tire loads, including the dynamic load stress factors, and the maximal and the minimal vertical dynamic load factors, are used to evaluate the dynamic interaction between heavy vehicles and roads under the condition of random road surface roughness. Matlab/Simulink is used to simulate the nonlinear dynamic system and calculate the impact factors. The effects of different road surface conditions on the safety of vehicle movement and the durability of parts of a vehicle are analyzed, as well as the effects of different structural parameters and different vehicle speeds on road surfaces. The study results provide both the warning limits of road surface roughness and the limits of corresponding dynamic parameters for the 5-axle heavy truck.

关键词： 5-axle heavy truck nonlinear dynamics dynamic impact factor road surlhce roughness

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