家猫爪垫减振机理及其在轮胎花纹中的仿生应用研究

猫科动物运动时表现出极强的减振特性,爪垫作为与地面接触的唯一躯体部分是影响减振效果的关键因素.通过对家猫爪垫的组织学和接地力学试验研究表明,爪垫的减振机理主要体现在:爪垫组织结构呈现的多层特征有助于衰减接地应力;正常行走步态下爪垫力学特性表征出的爪垫-地接触中存在摆动变形的运动特征有利于缓冲储能的发挥.利用家猫爪垫的减...

Vibration reduction mechanism of cat claw pad and its bionic application in tire pattern

Cats show extremely strong vibration reduction characteristics when moving.As the only body part in contact with ground,claw pad is the key factor affecting vibration reduction effect.Histological and contact mechanical tests of cat claw pads show that the vibration reduction mechanism of claw pad mainly lies in multi-layer characteristics of claw pad tissue structure,which is helpful to attenuate ground-contacting stress;mechanical characteristics of claw pad under normal walking gait indicate swing deformation existing in claw pad-ground contact,which is conducive to the exertion of buffer energy storage.The bionic design of tread groove wall structure in middle area of PCR tire was performed by using the vibration reduction mechanism of domestic cat claw pad.The pattern structure design imitating the asymmetric layout of honeycomb hexagonal pits was adopted to realize the bionic application of vibration reduction mechanism of domestic cat claw pad.The results of finite element simulation analysis showed that when tire rolls,the designed bionic tread pattern can effectively reduce the tire ground-contacting pressure deflection and the radial excitation force between tire and pavement,and improve tire tread abrasion and vibration and noise characteristics.