基于图形流技术的系杆拱桥方案设计研究

发布时间：2018-08-17 14:39

【摘要】：系杆拱桥因其造型美观、跨越能力大等优点在工程中得到广泛的应用。目前,系杆拱桥的仿真分析一般采用MIDAS/Civil、ANSYS、桥梁博士等有限元软件。这些有限元软件虽然可以解决系杆拱桥的建模与计算问题,但这些软件在建模过程中主要采用菜单或命令流的模式,建模效率较低,软件建模难以深入反映系统拱桥的工程特征。图形流技术是工程问题求解建模的一种新技术,该技术要求研究者对相关工程专业知识、专家求解技术等工程特征进行深入分析、研究和提炼,通过一系列既相互独立又彼此联系的功能图形对象,建立工程问题的求解模型,将工程问题的求解转化为创建、操作和推演功能图形对象。基于图形流建模技术,使工程问题的求解更容易反映其工程特征,更加符合工程技术员的思维习惯,从而实现工程问题求解的简单化、集成化和高效率。方案设计是系杆拱桥设计的一个重要步骤,主要包括拱桥结构形式选择、反复的结构参数拟定及结构力学计算结构评估,直到得到一个满意并优化了的设计方案,其关键在于参数拟定后的结构力学的准确计算和评估。本文以具体典型系杆拱桥工程方案设计实例,在对系杆拱桥结构建模计算规律与特征分析、研究的基础上,运用图形流技术,将某一典型系杆拱桥的结构力学模型抽象为若干个功能模型对象(包括立面、平面横断面等),通过创建、操作这些功能模型对象,来获得适合于空间三维计算的MIDAS模型,并借助MIDAS软件进行结构力学评估,使得系杆拱桥结构方案设计中的结构力学建模计算更加便捷高效,通过便捷的方案控制参数的反复修改和计算结果比较,可以便捷获得具体系杆拱桥结构的优化方案。开发实践表明基于图形流技术的系杆拱桥方案设计中结构建模的可行性和准确性。
[Abstract]:Tied arch bridge is widely used in engineering because of its beautiful shape and large span ability. At present, finite element software such as Midas / Civil ANSYS, bridge doctor and so on are generally used in simulation analysis of tied arch bridge. Although these finite element software can solve the modeling and calculation problems of tied arch bridge, they mainly use menu or command flow mode in the modeling process, and the modeling efficiency is low. Software modeling is difficult to reflect the engineering characteristics of the system arch bridge. Graphic flow technology is a new technology for engineering problem solving modeling, which requires researchers to deeply analyze, study and refine the engineering characteristics such as related engineering expertise, expert solving technology, etc. Through a series of independent and interrelated functional graphics objects, the solving model of engineering problems is established, and the solution of engineering problems is transformed into the creation, operation and deduction of functional graphics objects. Based on the graphic flow modeling technology, the solution of engineering problems can easily reflect its engineering characteristics and conform to the thinking habits of engineering technicians, thus realizing the simplification, integration and high efficiency of engineering problem solving. The scheme design is an important step in the design of tied arch bridge. It mainly includes the selection of the structure form of the arch bridge, the repeated structural parameter formulation and the structural evaluation of the structural mechanics calculation, until a satisfactory and optimized design scheme is obtained. The key lies in the accurate calculation and evaluation of structural mechanics after parameter formulation. In this paper, with the example of typical tied arch bridge project design, based on the analysis of modeling and calculation law and characteristic of tied arch bridge structure, the graphic flow technique is used. The structural mechanics model of a typical tied arch bridge is abstracted into several functional model objects (including elevation, plane cross section, etc.). By creating and manipulating these functional model objects, the MIDAS model suitable for spatial 3D calculation is obtained. With the help of MIDAS software to evaluate structural mechanics, the structural mechanics modeling and calculation in the scheme design of tied arch bridge is more convenient and efficient. Through the repeated modification of the control parameters of the convenient scheme and the comparison of calculation results, The optimization scheme of tied arch bridge structure can be easily obtained. The development practice shows the feasibility and accuracy of structural modeling in the scheme design of tied arch bridge based on graphic flow technology.
【学位授予单位】：石家庄铁道大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.225

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