摘要
将轮胎材料简化为各向同性超弹性材料特性,考虑轮胎与轮毂和地面之间的三维接触以及轮胎中钢丝圈的影响,建立飞机单腹板机轮整体结构有限元模型,主要分析不同轮胎材料参数和内压下,单腹板轮毂轮缘处的径向变形。结果表明:轮毂剖面上测点的应变值与实验结果基本一致,轮胎下沉量与轮毂测点的径向变形和轮毂所受的载荷基本呈线性关系;凸出一侧的轮缘变形最大;轮胎下沉量较大时,轮胎材料参数对轮毂的径向变形影响明显;轮毂测点径向变形在1-2.5mm时,相同的径向变形,轮毂受到的总载荷受轮胎材料参数变化而变化,而在变形较大或较小时,影响不明显。对于同一种轮胎材料,不同的内压,轮毂的变形差别比较大,气压越高,对于相同的轮胎下沉量,轮毂受到总体荷载也越高。
The properties of tire is defined as isotropic hyperelastic material. Considering three dimension contact pairs between the wheel and tire, the wheel and bear, the tire and ground, and the steer circles in the tire, the elastoplastic finite element model on the unispoke-wheel of aeroplane was established. The radial deformation of wheel was discussed for the different material parameters and internal pressures of the tire. The results show that the strains from the finite element analysis on the section are satisfied with the experimental ones. The radial deformation and the total loads of the wheel is approximately linear to the pressure displacement of tire. The position of maximal deformation is on the bulgy flange of the wheel. The radial deformation of wheel is affected by the material parameters of tire when the deformation of tire is larger. For the same radial deformation of wheel, the total loads are affected by the material parameters of tire when the radial deformation values range from 1mm to 2. 5mm. The deformation and total loads are also sensitive to the internal pressures. For the same material parameters if the internal pressures are high the total loads will be large.
出处
《力学季刊》
CSCD
北大核心
2003年第1期44-49,共6页
Chinese Quarterly of Mechanics
关键词
单腹板轮毂
弹塑性
超弹性
径向变形
内压
三维接触
unispoke-wheel
elastoplastic
hyperelastic
radial displacement
internal pressures
3-D contact pairs
