关键词: 自卸车货箱, 磨损, 几何布朗运动, 预测

Abstract: The dumping processes of a dump truck were simulated by coupling the discrete element method and the finite element method. The abrasive wear time series of each grid on the bottom floor was obtained by the co-simulation results. Wear height variation of bottom floor was regarded as the stochastic dynamic process, and the geometric Brownian motion was used to build the degradation model of body wear. The drift and diffusion coefficients of wear height on each grid were calculated by maximum likelihood estimation and Bayesian posterior method. The wear behavior evolution of the body floor may be predicted based on the degradation model.

Key words: dump truck body, wear, geometric Brownian motion, prediction