NBI综合测试台真空筒体的结构分析和优化

发布时间：2018-05-04 23:35

本文选题：NBI综合测试台 + 有限元　；参考：《合肥工业大学》2012年硕士论文

【摘要】：有限元技术作为性能分析与仿真的一种非常有效的手段，，能够轻松的求解各种复杂工程的结构问题。现代结构优化理论和方法是以现代力学理论与数学优化算法为理论基础提出的新的理论和方法，为工程设计人员寻出最优化方案提供了理论依据。通过将有限元技术与现代结构优化理论和方法进行有机结合，可以有效提高设计水平、减少原材料消耗、缩短产品设计周期、增强产品的市场竞争力。本文通过利用有限元技术对NBI综合测试台真空筒体的结构进行分析，验证真空筒体的稳定性和安全可靠性，同时结合现代结构优化理论和方法对真空筒体的结构进行优化和改进，达到减少重量、节约成本的目的。首先对NBI综合测试台真空筒体进行了基本力学分析，明确了真空筒体的受载情况；其次利用有限元分析软件建立了真空筒体的有限元模型，在以上基础上对真空筒体进行了静力分析和模态分析的相关研究。通过对真空筒体的静力分析和研究，验证了真空筒体结构的稳定性和安全可靠性。通过对计算结果的分析和研究，得知真空筒体的最大应力远小于材料的许用应力，得出真空筒体结构满足其强度和刚度要求的结论。并同时根据分析结论，提出了对真空筒体的结构改进方案。通过对真空筒体的模态分析和研究，求解出了真空筒体前6阶模态下的固有频率，通过对固有频率的分析和研究，为真空筒体在工作状态时有效地避免共振等情况的发生提供了理论依据，并提出了有效地避免共振发生所应采取的措施。在有限元分析的基础上，根据提出的结构改进方案，建立了真空筒体的尺寸优化模型，寻求出了最优化方案。通过对最优化方案进行相应的有限元分析，并将优化前后的真空筒体的结构性能进行比较，分析得出优化后的真空筒体结构不仅在性能上满足要求，并且有效地减轻了真空筒体的重量，达到了节约成本的目的。
[Abstract]:As a very effective means of performance analysis and simulation, finite element technology can easily solve various structural problems of complex engineering. Modern structural optimization theory and method is a new theory and method based on modern mechanics theory and mathematical optimization algorithm, which provides a theoretical basis for engineering designers to find out the optimization scheme. By combining finite element technology with modern structural optimization theory and method, the design level can be improved effectively, the consumption of raw materials can be reduced, the design cycle of products can be shortened, and the market competitiveness of products can be enhanced. In this paper, the structure of vacuum cylinder of NBI comprehensive test bench is analyzed by using finite element technique to verify the stability and safety of vacuum cylinder. At the same time, the structure of vacuum cylinder is optimized and improved with modern structural optimization theory and method, so as to reduce the weight and save the cost. Firstly, the basic mechanics analysis of vacuum cylinder of NBI comprehensive test bench is carried out, and the loading situation of vacuum cylinder is clarified. Secondly, the finite element model of vacuum cylinder is established by using finite element analysis software. On the basis of above, the static analysis and modal analysis of vacuum cylinder are studied. Through the static analysis and research of vacuum cylinder, the stability and safety reliability of vacuum cylinder structure are verified. Through the analysis and study of the calculation results, it is found that the maximum stress of the vacuum cylinder is far less than the allowable stress of the material, and the conclusion that the vacuum tube structure meets the requirements of its strength and stiffness is obtained. At the same time, according to the conclusion of analysis, the structure improvement scheme of vacuum cylinder is put forward. Through the modal analysis and research of vacuum cylinder, the natural frequency of the first six modes of vacuum cylinder is solved, and the natural frequency is analyzed and studied. This paper provides a theoretical basis for the vacuum cylinder to avoid resonance and other situations effectively, and puts forward the measures to be taken to avoid resonance effectively. On the basis of finite element analysis, the size optimization model of vacuum cylinder is established according to the structure improvement scheme proposed, and the optimization scheme is found out. Through the finite element analysis of the optimization scheme and the comparison of the structural performance of the vacuum cylinder before and after the optimization, it is concluded that the optimized vacuum cylinder structure not only meets the requirements in performance. The weight of vacuum cylinder is reduced effectively and the cost is saved.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH122;TP391.7

【引证文献】