一回路止回阀强度分析及优化设计

发布时间：2018-02-22 12:15

本文关键词： 止回阀强度分析优化设计 Pro/E ANSYS　出处：《哈尔滨工程大学》2011年硕士论文　论文类型：学位论文

【摘要】：止回阀是船用核动力回路中的重要设备,而阀体又是止回阀的最主要部件之一,不管是新产品的开发设计,还是老产品的结构改进,都离不开阀体的开发设计与改进。如何开发设计出均匀强度的阀体、如何改进阀体的结构以减少阀体的应力集中现象,是目前阀门行业亟待解决的问题,更是船用核动力装置阀门必须解决的问题。对冲式止回阀的强度性能指标关系着核反应堆的安全,所以研究并优化主止回阀的强度技术参数具有重要意义。本论文运用ANSYS-Workbench有限元软件,对对冲式止回阀阀体进行强度分析和优化设计。首先,参照对冲式止回阀设计图纸,在保证阀体内部流场边界形状、尺寸不变的情况下,应用大型三维实体几何建模软件Pro/E建造其三维实体几何模型,又根据有限元分析的需要,对阀体模型进行了修改,省略了阀体内部较小的倒角面,并将几何模型保存为IGES格式,以供导入ANSYS中。其次,应用ANSYS有限元软件对阀体几何模型进行约束、加载、划分网格等有限元分析的物理模型建立,并进行强度分析,得到阀体的应力分布和变形情况。第三,以阀体的最大等效应力和应变为约束条件,阀体的质量作为目标函数,以阀体结构的基本尺寸作为设计变量,经多次变参数优化分析计算,得出阀体最优的结构尺寸。计算结果表明：优化后阀体的应力应变分布更加均匀合理,在满足阀体强度要求情况下,充分利用了材料,减轻了重量,降低了成本。通过对阀体的研究分析,可为以后新阀门的研发设计及其它零部件的有限元分析与优化设计奠定一定的基础。
[Abstract]:Check valve is an important equipment in marine nuclear power loop, and the valve body is one of the most important parts of check valve, whether it is the development and design of new products or the structural improvement of old products. How to develop and design the uniform strength valve body, how to improve the structure of the valve body to reduce the stress concentration phenomenon of the valve body, is the problem to be solved urgently in the valve industry, and how to develop and design the uniform strength valve body and how to improve the structure of the body to reduce the stress concentration phenomenon of the valve body. The strength performance index of the hedge check valve is related to the safety of nuclear reactor, so it is of great significance to study and optimize the strength technical parameters of the main check valve. In this paper, ANSYS-Workbench finite element software is used to analyze and optimize the strength of punching check valve body. Firstly, with reference to the drawing of the hedge check valve, the shape and size of the flow field inside the valve body are kept unchanged. The 3D solid geometric model is constructed by using the large-scale 3D solid geometric modeling software Pro/E. According to the need of finite element analysis, the valve body model is modified, the smaller chamfer surface inside the valve body is omitted, and the geometric model is saved to IGES format. Secondly, the physical model of finite element analysis of valve body is established by ANSYS finite element software, such as constraining, loading, meshing and so on, and the stress distribution and deformation of valve body are obtained by strength analysis. Taking the maximum equivalent stress and strain of the valve body as the constraint condition, the mass of the valve body as the objective function, and the basic size of the body structure as the design variable, the optimum structure size of the valve body is obtained through the optimization analysis and calculation of multiple variable parameters. The calculation results show that the stress and strain distribution of the optimized valve body is more uniform and reasonable. Under the condition of satisfying the requirements of the body strength, the material is fully utilized, the weight is reduced and the cost is reduced. It can lay a foundation for the research and design of new valve and the finite element analysis and optimization design of other parts.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH134

【引证文献】