大扁平比胎侧解析刚度建模及轮胎动力学分析EI北大核心CSCD

针对重载轮胎大扁平比结构建模问题,从动力学建模、实验模态分析、结构参数辨识等方面,基于解析弹性基础的欧拉梁模型,对重载轮胎的柔性胎体和大扁平比胎侧曲梁的低频动力学特性开展研究,建立了考虑充气预紧力的欧拉梁胎体模型,利用实验模态方法,探究了不同充气压力下的柔性胎体振动特性;考虑胎侧曲梁预紧力弦效应和结构弯曲效应,建立了大扁平比胎侧曲梁解析刚度模型;基于模态测试结果,进行柔性胎体与解析胎侧结构参数辨识。研究结果表明:在0~180 Hz频率范围内,重载轮胎以结构周向弯曲振动为主,可利用基于弹性基础的柔性梁模型表征;大扁平比胎侧曲梁的解析刚度与胎侧的几何、结构和充气压力参数直接相关;轮胎充气压力影响柔性胎体梁的轴向预紧力和胎侧的弦刚度,进而影响轮胎弯曲振动特性。

Analytical sidewall stiffness model and kinematic analysis of the heavyloaded tire with a large flat ratio

The study investigates the planar vibration modeling of a radial tire with a large flat ratio for a heavy load vehicle.A proposed tire model with a flexible belt on an elastic analytical stiffness foundation is investigated via the theoretical modeling,experimental modal analysis and the parameters identification.The Euler beam model specifically assesses the circumferential vibration of the flexible belt,moreover the influence of the inflation is discussed.The analytical multi-stiffness function of a large section ratio sidewall is derived by combining the membrane feature caused by inflation pressure and the structural deformation caused by sidewall curvature.Additionally,the parametric identification of the proposed tire model is discussed.The experimental and the theoretical results indicate the following:(1)the bending characteristic of the belt within 0~180 Hz can be featured with the flexible belt on an elastic analytical stiffness foundation tire model;(2)the multi-stiffness function of the curved sidewall assesses the pre-tension membrane feature and structural deformation,which is related to the inflation pressure,structural curvature and material properties;(3)the inflation pressure affects the pre-tension force of the belt and the pre-tension membrane feature of the sidewall.