关键词: 免充气轮胎, 径向刚度, 伪刚体建模, 弹性力学, 半逆解法, 刚柔耦合

Abstract: In view of the structural characteristics of new type pseudo-rigid non-pneumatic tires, a pseudo-rigid-flexible body coupling model was established to analyze the radial stiffness characteristics. The displacement equations of the plate spring and elastic wheel disks were coupled to solve the sinkage displacement and deformation of the tires, which were derived from pseudo-rigid body theory and elastic mechanics. The results show that there is linear relation between the sinkage displacements of pseudo-rigid non-pneumatic tires and the loads, and the tire radial stiffness is larger than ordinary pneumatic/non-pneumatic tires. Ride comfort of the tires is better when working at low speed and a little bit worse at high speed. To verify the above model, the finite element solution results were compared under the same boundary conditions. The results of the coupling model and the finite element method are close to each other, and the simulation time of the pseudo-rigid-flexible body coupling model is shorter. Finally, the radial stiffness of the tires was optimized by using the coupling model and the required design size parameters were obtained.

Key words: non-pneumatic tire, radial stiffness, pseudo-rigid body modeling, elastic mechanics, semi-inverse method, rigid-flexible coupling