基于ANSYS对工装动刚度的有限元分析

发布时间：2018-04-25 03:28

本文选题：力学实验工装 + 动刚度　；参考：《电子科技大学》2011年硕士论文

【摘要】：动刚度是衡量结构抵抗预定动态激扰能力的特性,动刚度愈大,机械结构在动态激振力作用下的振动量愈小,其抗振性能愈强。力学试验工装的动刚度越大,抗振性能愈强,越能将振动台的运动正确的传递给试验产品,越能模拟产品的实际振动情况。 ANSYS作为有限元领域的大型CAE通用分析软件,集结构、热、流体、电磁和声学于一体,以其多物理耦合分析的先进技术和理念,在国防领域和研究方面都有着广泛而深入的研究。本论文经过实例,论述了采用现代的设计方法,对力学试验工装进行模型设计后,基于ANSYS的有限元分析,大大提高了工装的动刚度,优化了设计方案,改善了随时间变化的载荷对力学试验工装结构的影响,使工装的一阶固有频率由原始设计的872Hz提高到了2119Hz,满足产品设计文件规定的力学试验要求。通过对力学试验工装动刚度的有限元分析,能提高工装的一阶固有频率,增强工装的抗振性能,其效果很好,具有很高的理论价值,对武器型号电子产品的设计有很好的借鉴和参考作用。
[Abstract]:The dynamic stiffness is the characteristic of structure resistance to predetermined dynamic disturbance, the greater the dynamic stiffness, the smaller the vibration of the mechanical structure under the dynamic excitation force, the stronger its vibration resistance. The greater the dynamic stiffness of the mechanical test tooling, the stronger the anti vibration performance, and the more accurate the motion of the vibration table to the test product, and the more it can simulate the real product. Interplanetary vibration.
ANSYS is a large CAE general analysis software for the finite element field, which integrates structure, heat, fluid, electromagnetic and acoustics. With its advanced technology and concept of multi physical coupling analysis, it has extensive and deep research in the field of national defense and research.
After an example, this paper expounds the use of modern design method, after the model design of the mechanical test tooling, based on the finite element analysis of ANSYS, greatly improves the dynamic stiffness of the tooling, optimizes the design scheme, and improves the influence of the load on the mechanical test tooling structure with the change of time, so that the first natural frequency of the tooling is from the original. The designed 872Hz is raised to 2119Hz, which meets the mechanical test requirements specified in the product design document.
Through the finite element analysis of the dynamic stiffness of the mechanical test, the first order natural frequency of the tooling can be improved and the anti vibration performance of the tooling is enhanced. The effect is very good and has a high theoretical value. It has a good reference and reference function for the design of the electronic products of the weapon model.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH123.3;TP391.7

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