混凝土搅拌运输车行驶平顺性仿真研究及试验分析-simulation research and experimental analysis on ride comfort of concrete mixer truck.docxVIP

AbstractDriving smooth of vehicles has become an important index of evaluation vehicles, based on the software ADAMS as a platform, with the concrete mixing transporter as the object of research, this paper is the study about the concrete mixer truck on driving smooth.This paper investigates the concrete mixer truck driving smooth mainly from two aspects: the simulation analysis based on ADAMS and the experimental analysis based on tests, the main contents of the study are as follows:In the paper a vehicle multi-rigid-body dynamics model is utilized, and the model is verified by experiments. The multi-rigid-body modeling process on main frame, vice frame is studied firstly , and modal analysis are did on the dynamic model, the results indicate that the dynamical modal analysis results of main frame, vice frame and the modal analysis results are consistent. Then, on the vehicle dynamic modeling of the main parameters identification, dynamics modeling is did for the primary connection links. and is incorporated with the model of main frame, vice frame to establish the vehicle dynamic model. The accuracy of vehicle dynamics model is showed through vertical vibration natural frequency from the experiment and the vibration size trend of the main points.The vehicle vibration modal analysis, transfer function analysis and frequency response analysis are did on the vehicle dynamics model of the concrete mixer truck. The modal analysis determine the vehicle resonance modal frequencies and modal shape, the analysis of the transfer function and frequency response shows that the vehicle resonance comes from the driving source that is produced between ground and wheelsThe sensitivity analysis is did on the kinetic parameter that affected to the cab, the results show that Former engine-mount rigidity coefficient, after engine-mount rigidity coefficient, former engine-mount damping coefficient, main shock absorbers damping coefficient, former leaf-spring vertical rigidity coeffic