本文關鍵詞： 履帶起重機臂架系統(tǒng) 復雜結(jié)構(gòu)快速建模 非線性分析 性能表制定　出處：《太原科技大學》2017年碩士論文　論文類型：學位論文

【摘要】：大噸位履帶起重機在核電、風電和軍事裝備吊裝領域中起著不可替代的作用,其臂架結(jié)構(gòu)復雜,是整機的核心承載構(gòu)件。由于履帶起重機臂架的各組成部件具有較高的關聯(lián)性,在設計中對其關鍵參數(shù)改動的同時也需對諸多相關構(gòu)造數(shù)據(jù)進行相應跟進調(diào)整。因此,在履帶起重機臂架設計系統(tǒng)中,當設計一個新的臂架時,需要同時考慮較多構(gòu)造參數(shù),并盡量逼近真實結(jié)構(gòu)進行結(jié)構(gòu)建模分析,以確保設計結(jié)果的精準性。臂架的作業(yè)工況繁多,對其精確設計需要反復地修改調(diào)整分析模型結(jié)構(gòu)數(shù)據(jù),計算工作量相當龐大繁雜。針對履帶起重機桁架式臂架的這些實際情況,本文系統(tǒng)分析其結(jié)構(gòu)特點,利用其結(jié)構(gòu)各段中間部分的重復性和兩端連接部分的特殊性,對履帶起重機臂架進行了程序化快速建模與非線性分析設計研究,實現(xiàn)了臂架的可控快速自動組合設計,提高了設計效率和設計的可靠與合理性。本文基于可視化編程技術在多層坐標空間對臂架系統(tǒng)中各組成臂節(jié)的結(jié)構(gòu)進行模塊化建模、通過坐標變換運算以構(gòu)造履帶起重機臂架復雜空間桁架結(jié)構(gòu)的批量化精準分析模型,參數(shù)化地實現(xiàn)了全部主臂結(jié)構(gòu)形式和全部工況的有限元模型搭建,并經(jīng)過邏輯計算、生成相應大批量命令流分析模型群,編制了大型履帶起重機臂架主臂作業(yè)全工況快速設計軟件,實現(xiàn)了此類型臂架的高效精準設計,有助于新機型的開發(fā)和行業(yè)自主知識產(chǎn)權的提升。本文主要的研究工作及成果如下:(1)分析履帶起重機臂架系統(tǒng)的工作原理、構(gòu)造方式和載荷組合等情況,基于面向?qū)ο蟮木幊碳夹g對履帶起重機臂架系統(tǒng)各不同臂節(jié)進行數(shù)學化抽象處理,然后建立組成履帶起重機各臂架的標準模塊并對其進行封裝建模后形成臂架整體有限元分析模型,極大地提高了代碼的封裝性、重復利用性和擴展性。(2)基于可視化的快速建模軟件系統(tǒng),通過對設計目標履帶起重機臂架復雜結(jié)構(gòu)所有工況遍歷式生成大批量分析模型群,實現(xiàn)了針對其所有工況的非線性有限元分析。(3)依據(jù)上述臂架結(jié)構(gòu)幾何非線性分析模型以及結(jié)合黃金分割一維搜索的最優(yōu)方法,得出臂架各工況的極限承載能力值,從而得出基于其自身承載力的起重機性能表,為交互考慮整機穩(wěn)定性形成起重機實用性能表打下了基礎。
[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.
【學位授予單位】：太原科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH213.7

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