毕业论文移动版

摘  要随着人们生活水平的提高，汽车逐渐成为人们代步出行的主要工具，越来越多的家庭选择汽车，这也使汽车市场变得景气，但与此同时各品牌之间的竞争也变得很大，这就要求品牌需要有更高的质量和性价比，这样才能在这场“战争”中占得先机。这种质量的提高需要良好的生产团队和严格的质检，因此对汽车零件的加工显得格外重要，经过不断的试验来增强汽车的性能，这样才能给购买者提供更高的安全保障。76852

汽车地板纵梁作为汽车车身的骨架，起着不可替代的作用。在车辆发生事故时，由于汽车会发生正面碰撞或者侧面碰撞，所以地板纵梁加强板就显得很重要。发生碰撞时，汽车受到压溃变形和弯曲变形，这时汽车地板纵梁加强板就能够有效地吸收和缓减车辆碰撞时的冲击能量，降低了对汽车本体和车内人员的伤害系数，从而得到了满意的能量吸收效果。因此，合理设计加强板的强度和刚度至关重要，这样一来可以满足所需要的安全系数。

本课题以汽车地板纵梁加强板为研究对象，运用有限元分析的方法完成对汽车地板纵梁加强板的动态特性分析；针对汽车地板纵梁加强板的受力情况和所需满足的强度、刚度要求，利用ANSYS软件进行模态分析，依照计算结果完成对零件的动态特性分析。

该论文有图55幅，表2个，参考文献27篇。

毕业论文关键词：汽车地板纵梁加强板  有限元分析  线性静态结构  模态分析  振动模态

Dynamic Characteristics Analysis of a Certain Type of Automobile Parts

Abstract With the improvement of people's living standards, the car has become the main tool for people walking travel, more and more families choose car, which also makes auto market becomes boom, but at the same time the competition among various brands has become large, which requires brands need to have higher quality and price, so as to in this "war" accounted for the initiative。 The improvement of the quality needs a good production team and strict quality control, so auto parts processing is particularly important, through continuous testing to enhance the vehicle's performance, so as to give buyers to provide higher security。

    Car floor rails as the car body skeleton, plays an irreplaceable role。 At the time of the accident happens in the vehicle, because the frontal impact and side impact of the car, so floor longitudinal beam reinforcing plate is very important。 When a collision occurs, the car was crushing deformation and bending deformation, then that the car floor longer on strengthen board can effectively absorb and decrease vehicle collision when the impact energy, reduces the damage coefficient of personnel inside the vehicle body and a vehicle, so as to get the satisfactory energy absorption effect of fruit。 Therefore, it is very important to design the strength and stiffness of the plate, so that the safety factor can be satisfied。

    This topic to automobile floor beam reinforcing plate as the research object, using finite element analysis method to complete analysis of the dynamic characteristics of automobile floor beam reinforcing plate; for automobile floor beam reinforcing plate stress and are required to meet the strength and stiffness requirements, by using the software of ANSYS modal analysis, according to the calculation results analysis of the dynamic characteristics of parts。

Key Words: Car floor stringer reinforcing plate  Finite element analysis  Linear static structure  Modal analysis  Vibration mode

目  录

摘要Ⅰ

Abstract-Ⅱ

目录Ⅲ

1 绪论1

1。1汽车零件的介绍1

1。2汽车地板纵梁加强板的研究现状-2 (责任编辑：qin)