According to the characteristics of the structure and the loading of large rectangle aqueduct with longitudinal beams, we study the static structure calculation methods and compare the practical space method, the girder method and the solid 3-d fem 摘要根据大型多纵梁矩形渡槽槽身结构及其受力特点,研究了其结构静力计算的方法,并对梁格法、三维实体单元有限元法和实用空间分析法进行了对比。
Through deeply comprehending the theory of structure calculation of the crane and secondary development technology, especially how to realize the method of structure analysis and calculation of the port tyre crane, i succeed in parameterized finite element modeling of the port tyre crane body and boom based on apdl 该平台参数化、模块化建立港口轮胎式起重机的有限元模型,可方便地进行力学分析,为港口轮胎式起重机的设计研发提供一个快速、准确的参考结果。
Abstract : the structure static analysis of jack-up platform & quot; ganghai no . 1 & quot; is carried out by using finite element method . this work includes the optimization of the structure calculation model, the analysis of the calculating result and the prediction of the strength and stiffness of the platform structure 文摘:介绍了利用有限元法对“港海一号”自升式钻井平台进行结构静力分析的情况,其中包括计算模型的优化,静力分析揭示的平台结构内力分布特点,以及对平台强度刚度的准确预报等。
Then on the basis of calculating result from the prefigurative deviation control structure calculation, " rational data forecast processing about error adjust in prefigurative deviation control was made by the prefigurative theory of bp neural network and corresponding program and software matlab6.1 . at last via the data comparison with the practical survey data draw a conclusion : it is feasible for the construction prefigurative deviation control and error adjust used in pc rigid frame bridges to use the calculation model and program brought forward in this paper 同时,在对预应力混凝土刚构桥施工过程线形预拱度控制的结构计算分析的基础上,利用bp神经网络的预测理论和相应的程序及软件包matlab6.1对预拱度控制中的误差调整进行了较好的预测处理,通过与实际施工数据及成桥后测量结果作分析比较,得到结论:运用本论文的计算模型和程序对预应力混凝土刚构桥预拱度控制过程进武汉理工大学硕士学位论文行结构分析和误差调整处理是可行。
Following the development trend of valve cad, according to the requirements of the chengdu chengfeng valve limited company and based on mdt, this article develops the 3d parametric valve design system . the main work and achievements are as follows : based on the 2d engineering drawing of the several different valves the company provided, the 3d parametric basic drawing-base is set up using mdt which is a 3d design platform, including all the parts drawings and the general assemblage drawings of the valve models; in accordance with the common steps of the valve design, the parameter editors are designed to edit, import and export the valve parameters and are provided with the function of double synchronization on parameters displaying for convenience in use; in order to meet demands of users and make the design more accurate, reliable and practical, the assistant formula calculators are developed, which can automatically do all types of structure calculation in the procedure of valve design, and export the calculation manual of valve design; in order to make designers more rivalries, taking full advantage of internetmntranet technology, the virtual design center is developed, which integrate netmeeting, terminal service and super links, so that the designer can directl y use applications on remote server, communicate with other designers on intranet / internet, share software resources and realize long-distance cooperative design 根据阀门cad发展趋势,针对成都乘风阀门有限责任公司阀门设计现状,本课题基于mdt三维设计平台开发了阀门三维参数化设计系统,主要完成的工作和成果如下:根据公司提供的几种不同结构阀门的二维工程图纸,利用mdt三维设计平台建立了三维参数化基本图形库,其中包括所有零部件和总装配模型图及二维工程图;依照阀门设计的一般步骤设计了参数编辑器,用来对阀门尺寸参数进行编辑、输入、输出等,具有参数双向同步显示功能,使用十分灵活方便;根据用户的需求,为了使设计达到精确、可靠、实用的要求,设计开发了辅助计算器,能自动完成阀门设计过程中所需的各种结构计算,并可以输出阀门设计计算说明书;为了使设计人员更具有竞争力,本系统利用internetintranet技术设计开发了虚拟设计中心子模块,虚拟设计中心集成了网络会议、终端服务、超级链接等功能,可以让设计师直接使用服务器上的应用程序,与intranetinternet上的其他设计专家进行交流、共享软件资源,实现远程协同设计。
3 . the finite element method in spatial sluice structure calculation was researched . regarding the whole sluice and foundation as an integral body, the static and dynamic analysis of the structure was made, and the spatial stress was transformed into plane stress according to demands and habits of the project design 3研究了空间水闸结构计算的有限元法,将整个水闸和地基作为一个整体,进行静动力分析,并把空间应力转换为符合工程设计要求和习惯的平面内力,导出了相应的计算公式。
After that, the paper makes a relatively profound study analysis of the structure calculation and error adjust forecast technique used in pc rigid frame bridges construction monitor and control, and comprehensive analyzes of the influence factors in building the bridges, based on the engineering practice 本论文的其后部分主要是从工程实际出发,对预应力混凝土刚构桥施工过程线形预拱度控制的结构计算分析和误差调整预测方面作了较为深入的研究,对预应力混凝土刚构桥施工控制过程的影响因素作了全面的分析。