关键词: 铁道车辆, 抗侧滚扭杆系统, 理论计算方法, 抗侧滚刚度, 改进方法

Abstract: Antiroll stiffness is an important parameter during the designing of antiroll torsion bar system（hereinafter called torsion bar system）. Accurate calculation of stiffness can effectively ensure the product with high performance. In order to solve the problems of low accuracy of antiroll stiffness traditional theoretical calculation method and slow calculation speed of finite element method, based on the deformation state of each component of torsion bar system, reciprocal work theorem method and superposition principle, an optimal theoretical calculation method for torsion bar system with straight torsion bar is proposed. The influence of torsion and bending deformation of torsion bar shaft, torsion and radial deformation of rubber bushing of support seat and deformation of rubber joint and connecting rod on antiroll stiffness are considered in optimal method. The traditional method, optimal method and finite element method are used to calculate the stiffness of a certain type of torsion bar system, and the accuracy of the above three methods is verified by experiments. The results show that the proposed method is more practical than the traditional method, whose calculation accuracy is greatly improved; Meanwhile, compared with the finite element method, A great amount of preprocess procedure is eliminated, the stiffness calculation and design cycle can be effectively shortened; All in all, the optimal theoretical calculation method provides an accurate and rapid supplemental method for designers to calculate the antiroll stiffness of torsion bar system.

Key words: railway vehicles, antiroll torsion bar system, theoretical calculation method, antiroll stiffness, optimal method