车辆振动环境下人体脊椎动态特性分析

发布时间：2018-01-07 02:43

本文关键词：车辆振动环境下人体脊椎动态特性分析　出处：《东北大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着汽车工业的迅猛发展,人们不仅仅满足于车辆性能,对车辆乘坐舒适性的要求也越来越高,脊椎在车辆振动环境下的动态特性及振动损伤问题也受到了研究者的广泛关注。了解人体脊椎的动态特性及寻找脊椎的振动保护方法值得进一步深入研究。本文对车辆振动环境下人体脊椎的静动态特性进行了研究。首先,应用Mimics和有限元分析软件ANSYS10.0建立人体脊椎T12-Pelvis三维实体模型,依据解剖结构添加软骨和韧带。对所建立的有限元模型进行分析,并将仿真结果同已有实验数据作对比,以确保有限元模型的有效性。其次,应用ANSYS Workbench12.1对T12-Pelvis有限元模型每相邻节段进行垂直、前俯、后仰、侧弯和外旋坐姿下的静力分析,对所建立的模型整体进行四种坐姿下的静力分析。再次,分析人体脊椎动态特性对椎间盘材料属性的敏感度,对人体脊椎T12-Pelvis段有限元模型进行模态分析,提取固有频率及振型,研究脊椎在座椅约束下的动态特性。最后,对人体脊椎T12-Pelvis有限元模型进行谐响应分析,仿真结果同静态特性分析结果作对比,研究车辆行驶中动载荷对人体脊椎的影响。本文的研究结果为车辆座椅的设计提供了有力的参考。
[Abstract]:With the rapid development of automobile industry, people are not only satisfied with the performance of vehicles, but also have higher and higher requirements for ride comfort. The dynamic characteristics and vibration damage of the spine in the vehicle vibration environment have also received extensive attention. It is worth further study to understand the dynamic characteristics of the human spine and to find the method of vibration protection of the spine. The static and dynamic characteristics of human spine under vehicle vibration were studied. Firstly, the three-dimensional solid model of human spine T12-Pelvis is established by using Mimics and finite element analysis software ANSYS10.0. By adding cartilage and ligaments according to the anatomical structure, the finite element model is analyzed, and the simulation results are compared with the experimental data to ensure the validity of the finite element model. Secondly, ANSYS Workbench12.1 is applied to the finite element model of T12-Pelvis vertical, forward and backward for each adjacent segment. The static analysis of lateral bending and external rotation is carried out, and the static analysis of the whole model is carried out under four kinds of sitting positions. Thirdly, the sensitivity of the dynamic characteristics of the human spine to the material properties of the intervertebral disc is analyzed, and the modal analysis of the finite element model of the T12-Pelvis segment of the human spine is carried out to extract the natural frequency and vibration pattern. The dynamic characteristics of spine under seat constraint are studied. Finally, the harmonic response of the T12-Pelvis finite element model of human spine is analyzed, and the simulation results are compared with the static characteristic analysis results. The effect of vehicle dynamic load on human spine is studied. The results of this paper provide a powerful reference for the design of vehicle seat.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：U463.836;R322

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