关键词: 拖挂房车底盘, 数字孪生, 结构安全, 实时监测

Abstract: To solve the problem of chassis structure failure caused by prejudgment error in the driving process of trailer caravans,a chassis structure safety monitoring method based on digital twin and neural network was proposed.The five-dimensional digital twin model of the trailer caravan was constructed using digital twin technology.The vehicle mass,gravity position center and acceleration were taken as the variables,and the stress distribution and failure state of the chassis were taken as the prediction goals to establish a structural simulation data for emergencybraking,emergency steering and emergency braking and steering conditions.Through BP neural network regression training and confidence verification,the real-time monitoring of chassis structure performance and driving safety status assessment were realized.Numerical experiments showed that the proposed method had real-time with high accuracy and recall rate,which could support the safe use and optimal design of trailer caravans.

Key words: caravan chassis, digital twin, structural safety, real time monitoring