基于位移法的多轴汽车轮胎载荷计算方法的研究

摘要

针对多轴汽车轮胎载荷计算的超静定问题的求解复杂性,基于位移法、刚体车身假设和车身刚体位移与轮胎等效变形之间的关系,以车身位移为未知量建立了车身的平衡方程；考虑整车重力、纵横向惯性力和转弯工况质心侧向位移引起的侧倾力矩的作用,建立了多轴汽车在弯曲、扭转、起动/制动和转弯等工况下轮胎载荷的矩阵方程,只需简单的线性代数计算即可方便地求得各种工况下的轮胎载荷.%In view of the solving complexity of hyperstatic problem in calculating tire loads of multi-axle v< hide, the balance equations for vehicle body are established based on displacement method, the assumption of veh cle body as rigid body and the relationship between rigid vehicle body displacement and equivalent tire deformation with body displacement as unknown quantity. Then considering the effects of vehicle gravity, the inertia forces alor longitudinal and transverse directions and the rolling moment caused by the offset of mass center, the matrix equi tions of tire loads under the conditions of bending, torsion, starting/braking and cornering of multi-axle vehicle ai set up, with which the tire loads in different conditions can be obtained simply only by linear algebra calculation.