可升降泳池平台结构设计及力学特性研究

发布时间：2018-03-16 04:08

本文选题：可升降泳池　切入点：平台结构　出处：《江苏大学》2017年硕士论文　论文类型：学位论文

【摘要】：传统泳池功能单一,易造成资源浪费,且无法满足不同人群对水深的要求。可升降泳池的水深可以根据需要进行调整,并可一池多用,大大提高泳池的使用效率。目前国内关于可升降泳池的研究极少,极大地制约了我国泳池可升降技术的发展。可升降泳池平台结构作为主体承重部件,对其进行设计、分析及优化具有重要的意义。本文设计了一种可升降泳池平台结构,并运用有限元法,对可升降泳池平台结构进行了深入研究,主要研究内容如下:(1)根据实际应用要求,提出了一种剪叉式可升降泳池设计方案,设计了可升降泳池平台结构,并以静力学理论、模态分析理论、多目标驱动优化法为基础,对该平台结构进行了优化。(2)以静力学理论为基础,在恒载工况下,研究了竖杆高度、格子数及支撑座位置对平台结构静力学性能的影响,结果表明:竖杆高度、格子数及支撑座位置的变化均会对平台结构静力学性能产生影响;根据恒载工况下的静力学分析结果,得出了恒载工况下静力学性能最优的平台结构;研究了该平台结构在变载工况下的变形、应力及应变情况,得出了平台结构的安全载重范围。(3)以模态分析理论为基础,对恒载工况下的最优平台结构进行了模态分析,得出了该平台结构的前六阶振型云图及对应的固有频率和振幅;对平台结构的前六阶振型云图进行了分析,以降低平台结构振幅为目标,提出了八种改进方案,对比了八种改进方案的模态分析结果,得出了最优改进方案。(4)以降低可升降泳池平台结构的质量为目标,以平台结构的刚度和强度为约束条件,采用ANSYS Workbench的优化分析工具GDO(多目标驱动优化法),对恒载工况下最优的平台结构进行了优化设计,在综合考虑实际应用及优化参数灵敏度差异的基础上,最终确定了最优设计方案;通过与优化前平台结构进行对比分析,发现优化后平台结构的总质量降低了22.54%,实现了平台结构的轻量化设计。
[Abstract]:The traditional swimming pool has a single function, which is easy to cause waste of resources and can not meet the requirements of different people for water depth. The water depth of the elevating and descending swimming pool can be adjusted according to the need, and the pool can be used in many ways. At present, there is very little research on the lifting pool in our country, which greatly restricts the development of the swimming pool lifting technology in our country. The platform structure of the lifting pool is designed as the main bearing part. It is of great significance to analyze and optimize the structure. In this paper, a kind of platform structure is designed, and the finite element method is used to study the structure of the platform. The main research contents are as follows: 1) according to the requirements of practical application, In this paper, a design scheme of shear-fork adjustable swimming pool is proposed, and the platform structure is designed, which is based on static theory, modal analysis theory and multi-objective driving optimization method. Based on statics theory, the influence of vertical bar height, lattice number and support seat position on the static performance of the platform structure is studied under dead load condition. The results show that the height of the vertical rod is the same as the height of the vertical rod, and the influence of the lattice number and the position of the support seat on the static performance of the platform structure is studied. The change of lattice number and support seat position will affect the statics performance of the platform structure, and according to the statics analysis results under the dead load condition, the platform structure with the best statics performance under the dead load condition is obtained. In this paper, the deformation, stress and strain of the platform structure under variable load condition are studied. The safe load range of the platform structure is obtained. Based on the modal analysis theory, the modal analysis of the optimal platform structure under dead load condition is carried out. The first six modes of the platform structure and the corresponding natural frequencies and amplitudes are obtained, and the first six modes of the platform structure are analyzed, the aim of which is to reduce the amplitude of the platform structure, and eight improved schemes are put forward. The modal analysis results of eight improved schemes are compared, and the optimal improvement scheme is obtained. The aim is to reduce the quality of the platform structure, and the stiffness and strength of the platform structure are taken as the constraint conditions. The optimization design of the optimal platform structure under dead load condition is carried out by using the optimization analysis tool of ANSYS Workbench (multi-objective driven optimization method). On the basis of synthetically considering the practical application and the sensitivity difference of optimization parameters, the optimal structure of the platform is designed. Finally, the optimal design scheme is determined, and by comparing with the platform structure before optimization, it is found that the total quality of the platform structure is reduced by 22.54, and the lightweight design of the platform structure is realized.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH122

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