非充气机械弹性车轮静态径向刚度特性研究

为了研究机械弹性车轮的径向刚度特性，建立了一种基于Timoshenko曲梁的车轮模型，并利用有限元方法和样机试验进行了验证。通过对机械弹性车轮的悬毂式承载和刚度特性进行分析，揭示了车轮径向刚度主要取决于輮轮和铰链组的结构和力学特性。基于车轮的非线性有限元模型，对影响车轮径向刚度的輮轮刚度、铰链组材料和结构尺寸进行了参数化分析，结果表明：随着铰链组个数、横截面积和杨氏模量的增加，车轮径向刚度呈非线性增加；在车轮刚度较小且其他设计变量不变时，輮轮刚度的变化量近似等于车轮径向刚度的变化量。

Static Radical Stiffness Characteristics of Non-pneumatic Mechanical Elastic Wheel

A model based on Timoshenko curved beam is established to study the radial stiffness of mechanical elastic wheel, and the finite element method and prototype test are used to verify the model. The wheel loads supported on the rigid hub hanging in the middle of wheel are analyzed. The stiffness characteristics are illustrated for wheel with different structures by means of the qualitative analysis. The value of radial stiffness is determined by the structural characteristics and properties of elastic wheel disk and hinge groups. Parametric analysis of elastic wheel disk stiffness, hinge groups materials and sizes, which would affect radial stiffness, is done using the nonlinear finite element model. The results indicate that, as the number, cross-sectional area and Young's modulus of hinge increase, the radial stiffness increases nonlinearly. When wheel stiffness is small and other design variables are unchanged, the stiffness variation of elastic wheel disk is approximately equal to the radial stiffness variation of the wheel.