电站阀门多学科优化设计系统的开发

发布时间：2018-10-31 11:19

【摘要】：在电站设备之中,电站阀门作为控制和调节管道内介质的流量、流向和压力,以保证电站设备正常、安全的工作的关键部件,是整个电站能够稳定运行的重要保障。提高电站阀门的设计质量和缩短研发周期成为了企业提高市场竞争力的关键。因此,针对电站阀门开发一套集三维模型快速设计、多学科有限元特性分析和多学科优化设计于一体的设计平台,具有重要的理论意义和实际应用价值。本文针对电站阀门的设计特点将CAX及MDO技术进行集成,同时利用数据库技术对模型数据进行传递及管理以解决数据的流通和共享,完成了电站阀门多学科优化设计系统的开发,具体内容如下：首先,根据电站阀门的设计要求,在进行功能分析的基础上,综合分析国内外优秀的CAX集成平台的设计思路,将面向对象的设计思想应用在系统中,提出了一个具有模块化和共享化的多学科优化设计系统的框架结构。基于电站阀门各零部件的特征,建立模型特征参数数据库作为系统底层数据存储器,利用数据库技术实现各个设计平台之间的数据传递,并可以通过网络达到资源共享的目的。通过UG的二次开发,对阀门的各个零部件进行快速建模、模型快速修改、整机的自动装配。利用模型简化技术,开发模型智能简化模块,自动遍历模型特征,简化倒角、小孔等细小特征。增加FEA模型的转换的成功率、提高CAE的分析效率。利用ANSYS对电站阀门及其零部件进行结构、热应力、流场和模态多学科特性分析。并编辑APDL设计语言,集成VC++的开发环境,对ANSYS进行二次开发,封装有限元分析的整个操作过程使其在后台自动运行,解决有限元分析复杂的操作流程问题。开发ANSYS进程监控控件,时刻监控设计进度。采用iSIGHT集成ANSYS技术,对电站阀门进行多学科优化设计,实现结构同模态、结构同流场等多学科耦合优化。并以DN32截止阀为设计实例,对优化结果进行检验,制造物理样机验证设计结果。
[Abstract]:In power plant equipment, power plant valve is the key component to control and regulate the flow, flow direction and pressure of the medium in the pipeline to ensure the normal and safe operation of the power station equipment. It is an important guarantee for the whole power station to operate stably. Improving the design quality of power plant valves and shortening the R & D cycle have become the key to improve the market competitiveness of enterprises. Therefore, it is of great theoretical significance and practical application value to develop a design platform for power plant valves that integrates the rapid design of 3D model, multi-disciplinary finite element analysis and multidisciplinary optimization design. According to the design characteristics of power plant valve, this paper integrates CAX and MDO technology, and uses database technology to transfer and manage the model data to solve the problem of data circulation and sharing, and completes the development of multi-disciplinary optimization design system for power plant valve. The specific contents are as follows: firstly, according to the design requirements of power plant valves, on the basis of functional analysis, the design ideas of the excellent CAX integrated platform at home and abroad are synthetically analyzed, and the object-oriented design idea is applied in the system. A framework of a multi-disciplinary optimal design system with modularization and sharing is presented. Based on the characteristics of the components and components of the valve of power station, the model characteristic parameter database is established as the underlying data storage of the system. The database technology is used to realize the data transfer between the various design platforms, and the purpose of resource sharing can be achieved through the network. Through the secondary development of UG, the rapid modeling, model modification and automatic assembly of all parts of the valve are carried out. Using the model simplification technology, the model intelligent simplification module is developed, the model features are traversed automatically, the small features such as chamfering and small holes are simplified. Increase the success rate of FEA model transformation and improve the efficiency of CAE analysis. The structure, thermal stress, flow field and modal characteristics of valve and its components are analyzed by ANSYS. The APDL design language is edited, the development environment of VC is integrated, the second development of ANSYS is carried out, the whole operation process of finite element analysis is encapsulated so that it can run automatically in the background, and the complex operation flow problem of finite element analysis is solved. Development of ANSYS process monitoring control, monitoring design progress at all times. The multi-disciplinary optimization design of power plant valve is carried out by using iSIGHT integrated ANSYS technology to realize the multi-disciplinary coupling optimization such as the same mode of structure and the same flow field of structure and so on. Taking DN32 globe valve as a design example, the optimization results are verified and the design results are verified by making a physical prototype.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH134;TP311.52

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