履带起重机臂架系统快速建模非线性分析与性能表制定研究

发布时间：2018-02-05 23:39

本文关键词： 履带起重机臂架系统复杂结构快速建模非线性分析性能表制定　出处：《太原科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：大吨位履带起重机在核电、风电和军事装备吊装领域中起着不可替代的作用,其臂架结构复杂,是整机的核心承载构件。由于履带起重机臂架的各组成部件具有较高的关联性,在设计中对其关键参数改动的同时也需对诸多相关构造数据进行相应跟进调整。因此,在履带起重机臂架设计系统中,当设计一个新的臂架时,需要同时考虑较多构造参数,并尽量逼近真实结构进行结构建模分析,以确保设计结果的精准性。臂架的作业工况繁多,对其精确设计需要反复地修改调整分析模型结构数据,计算工作量相当庞大繁杂。针对履带起重机桁架式臂架的这些实际情况,本文系统分析其结构特点,利用其结构各段中间部分的重复性和两端连接部分的特殊性,对履带起重机臂架进行了程序化快速建模与非线性分析设计研究,实现了臂架的可控快速自动组合设计,提高了设计效率和设计的可靠与合理性。本文基于可视化编程技术在多层坐标空间对臂架系统中各组成臂节的结构进行模块化建模、通过坐标变换运算以构造履带起重机臂架复杂空间桁架结构的批量化精准分析模型,参数化地实现了全部主臂结构形式和全部工况的有限元模型搭建,并经过逻辑计算、生成相应大批量命令流分析模型群,编制了大型履带起重机臂架主臂作业全工况快速设计软件,实现了此类型臂架的高效精准设计,有助于新机型的开发和行业自主知识产权的提升。本文主要的研究工作及成果如下:(1)分析履带起重机臂架系统的工作原理、构造方式和载荷组合等情况,基于面向对象的编程技术对履带起重机臂架系统各不同臂节进行数学化抽象处理,然后建立组成履带起重机各臂架的标准模块并对其进行封装建模后形成臂架整体有限元分析模型,极大地提高了代码的封装性、重复利用性和扩展性。(2)基于可视化的快速建模软件系统,通过对设计目标履带起重机臂架复杂结构所有工况遍历式生成大批量分析模型群,实现了针对其所有工况的非线性有限元分析。(3)依据上述臂架结构几何非线性分析模型以及结合黄金分割一维搜索的最优方法,得出臂架各工况的极限承载能力值,从而得出基于其自身承载力的起重机性能表,为交互考虑整机稳定性形成起重机实用性能表打下了基础。
[Abstract]:Large-tonnage crawler crane plays an irreplaceable role in the field of nuclear power, wind power and military equipment hoisting, and its arm structure is complex. It is the core bearing member of the whole machine. Because of the high correlation of the components of the crawler crane jib. In the design of the key parameters change at the same time also need to follow up with a lot of relevant structural data. Therefore, in the crawler crane jib design system, when designing a new boom. In order to ensure the accuracy of the design results, it is necessary to consider more structural parameters at the same time and approach the real structure as far as possible to ensure the accuracy of the design results. The precise design needs to modify the structural data of the model repeatedly, and the calculation work is very large and complicated. In view of these actual conditions of truss jib of crawler crane, this paper systematically analyzes its structural characteristics. Based on the repeatability of the middle part of the structure and the particularity of the connection between the two ends, the program fast modeling and nonlinear analysis and design of the crawler crane jib are carried out. The design of controllable, fast and automatic combination of arms is realized. The design efficiency and the reliability and rationality of the design are improved. Based on the visual programming technology, the modular modeling of the structure of the arm joints in the multi-layer coordinate space is carried out. Through coordinate transformation operation to construct the complex spatial truss structure of crawler crane, the finite element model of all main arm structure and all working conditions is built parameterically. Through logical calculation, the corresponding large-scale command flow analysis model group is generated, and the rapid design software for the main arm of the large crawler crane is developed, which realizes the efficient and accurate design of this type of boom. In this paper, the main research work and results are as follows: 1) analyze the working principle, construction mode and load combination of crawler crane jib system. Based on the object-oriented programming technology, the different jib joints of crawler crane are mathematically abstracted. Then the standard module of each arm frame of crawler crane is established and the integral finite element analysis model of boom is formed after the package modeling which greatly improves the encapsulation of code. Based on the visual rapid modeling software system, a mass analysis model group is generated by traversing the complex structure of the design target crawler crane boom under all working conditions. According to the geometric nonlinear analysis model of the boom structure mentioned above and the optimal method of one-dimensional searching with golden section, the nonlinear finite element analysis for all its working conditions is realized. The ultimate load-carrying capacity of the boom is obtained, and the crane performance table based on its own bearing capacity is obtained, which lays the foundation for the interactive consideration of the stability of the whole machine to form the practical performance table of the crane.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH213.7

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