Although there is no risk of puncture, the vibration problem caused by discontinuous structures limits nonpneumatic tire development (NPT). The vibration reduction of nonpneumatic tires is a solvable urgent problem. This current study analyzed the dynamic grounding characteristics and the vibration reduction mechanism of the cat’s paw pads and then applied the mechanical properties to the bionic design of nonpneumatic tire spokes to solve the vibration problem. Domestic cats’ paw pads’ dynamic grounding characteristics were determined using the pressure-sensitive walkway, high-speed camera, and VIC-2D. The results indicated that the mechanical characteristics of swing deformation of paw pads during the grounding process attenuated the grounding stress and buffered the energy storage to achieve the vibration reduction effect. According to the similarity transformation, a finite element model of NPT that could accurately reconstruct the structure and realistically reflect the load deformation was employed. The structure design of asymmetric arcs on the spokes’ side edges was proposed, and it can effectively reduce the radial excitation force of NPT. The three parameters, the asymmetric arc, the thickness, and the curvature of spokes, were used as design variables to maximize the vibration reduction. The orthogonal experimental, the Kriging approximate model, and the genetic algorithm were carefully selected for optimal solutions. Compared with the original tire, the results showed that peak amplitude 1, peak amplitude 2, and the root square of the optimized tire’s amplitudes were reduced by 76.07%, 52.88%, and 51.65%, respectively. These research results offer great potential guidance in the design of low-vibration NPT.

中文翻译：

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基于国产猫爪垫机械性能的非充气轮胎辐条减振方法研究

尽管没有刺穿的危险，但由不连续结构引起的振动问题限制了非充气轮胎的发展（NPT）。非充气轮胎的减振是一个可解决的紧迫问题。本研究分析了猫爪垫的动态接地特性和减振机理，然后将机械性能应用于非充气轮胎辐条的仿生设计中，以解决振动问题。使用压敏走道，高速摄像头和VIC-2D确定了家猫的爪子的动态接地特性。结果表明，接地过程中爪垫摆动变形的力学特性减弱了接地应力，缓冲了储能，达到减振效果。根据相似度变换，采用了能精确重构结构并真实反映载荷变形的NPT有限元模型。提出了辐条侧面边缘非对称弧的结构设计，可以有效减小NPT的径向激励力。不对称弧，辐条的厚度和曲率这三个参数被用作设计变量，以最大程度地减少振动。精心选择了正交实验，Kriging近似模型和遗传算法来获得最佳解。与原始轮胎相比，结果显示，优化轮胎振幅的峰值振幅1，峰值振幅2和根方根分别降低了76.07％，52.88％和51.65％。