关键词: 半挂牵引列车；质心位置；侧倾法；纵倾法

Abstract: Measurement of vehicle centroid position is an important parameter in the design, manufacturing, and testing processes of automobiles, which has a significant impact on vehicle quality. How to measure the center of mass of vehicles, improve the accuracy of center of mass measurement and calculation, has become more important. The article takes the position of the vehicle's center of mass as the main research object, lists the main principles of measuring the center of mass position using the longitudinal tilt method, side-incline method, sway method, suspension method, and zero position method, and analyzes in detail the principles and calculation derivation process of the longitudinal tilt method and side-incline method. The main research content is how to calculate the centroid position of semi-trailer traction trains. Through a combination of measurement and theoretical calculation, a method for calculating the centroid position of semitrailer traction trains is proposed, which has a certain reference value for practical engineering applications.

Key words: Semitrailer traction trains; Barycenter position; Side-incline method; Longitudinal tilt method