【摘要】：隨著工程建設(shè)發(fā)展的需要,全地面起重機(jī)塔式副臂工況在吊裝行業(yè)得到了廣泛應(yīng)用,能夠?qū)崿F(xiàn)大起升高度和大起重載荷作業(yè)。塔式工況下,是由主副臂組合作業(yè),規(guī)范中并未提供這種組合臂的穩(wěn)定性計(jì)算方法,目前都是采用分別計(jì)算主臂和副臂的方法,顯然未考慮組合臂整體穩(wěn)定性的特點(diǎn)。同時(shí),在吊裝作業(yè)過程中,為了實(shí)現(xiàn)某一具體的吊載目標(biāo),主臂和副臂會(huì)有多種搭配組合方式,如何在考慮結(jié)構(gòu)的穩(wěn)定性的基礎(chǔ)上對(duì)主臂和副臂進(jìn)行較好的組合是一個(gè)亟待解決的現(xiàn)實(shí)問題。 針對(duì)上述問題,本文建立了全地面起重機(jī)塔式副臂工況有限元模型并進(jìn)行分析。在對(duì)有限元參數(shù)化技術(shù)、穩(wěn)定性理論以及MATLAB編程技術(shù)深入研究的基礎(chǔ)上,本文開展了如下工作： (1)分析全地面起重機(jī)塔式副臂的組合方式及工作原理,研究ANSYS關(guān)于APDL和高級(jí)建模部分的有關(guān)理論,對(duì)模型進(jìn)行簡(jiǎn)化,實(shí)現(xiàn)全地面起重機(jī)塔式副臂參數(shù)化建模； (2)研究有限元穩(wěn)定性理論和有限單元法,對(duì)全地面起重機(jī)塔式副臂系統(tǒng)進(jìn)行線性屈曲分析和非線性屈曲分析�；谏鲜龇椒�,比較了全地面起重機(jī)塔式副臂系統(tǒng)分別采用整體式和分體式計(jì)算方法的區(qū)別以及臨界載荷的變化規(guī)律,得出在進(jìn)行全地面起重機(jī)塔式副臂工況整體穩(wěn)定性時(shí),采用非線性整體式的計(jì)算方法比較合理。 (3)針對(duì)同一目標(biāo)吊載進(jìn)行臂架組合的實(shí)際問題,分別以相同起升高度和相同變幅幅度為目標(biāo),變化主副臂的長度和角度,研究基于穩(wěn)定性前提下的主副臂組合規(guī)律：主副臂的長度和主副臂的角度變化對(duì)組合臂架的穩(wěn)定性有重要影響。所得結(jié)論可對(duì)工程吊裝作業(yè)和工程設(shè)計(jì)提供一定參考。
[Abstract]:With the development of engineering construction, the working condition of tower-type auxiliary arm of all-ground crane has been widely used in hoisting industry, which can realize the operation of large lifting height and large lifting load. The stability calculation method of the combined arm is not provided in the specification. At present, the calculation method of the main arm and the auxiliary arm is adopted respectively. Obviously, the integral stability of the combined arm is not taken into account. At the same time, in the process of hoisting, in order to achieve a specific lifting target, the main arm and the auxiliary arm will have a variety of collocation and combination methods. How to combine the main arm and the auxiliary arm on the basis of considering the stability of the structure is a practical problem that needs to be solved urgently. In order to solve the above problems, the finite element model of the tower-type auxiliary arm of the all-ground crane is established and analyzed in this paper. Based on the in-depth study of finite element parameterization theory, stability theory and MATLAB programming technology, the following works are carried out in this paper: (1) the combination mode and working principle of tower-type auxiliary arms of all-ground crane are analyzed. The theory of ANSYS about APDL and advanced modeling is studied, and the model is simplified to realize the parameterized modeling of the tower-type auxiliary arm of all-ground crane. (2) the stability theory of finite element and finite element method are studied, and the linear buckling analysis and nonlinear buckling analysis of all-ground crane tower-type auxiliary arm system are carried out. Based on the above-mentioned methods, the difference between integral and split calculation methods and the variation rule of critical load in the whole ground crane tower-type auxiliary arm system are compared, and the overall stability of the whole working condition of the tower-type auxiliary arm of the all-ground crane is obtained. The nonlinear integral method is more reasonable. (3) aiming at the practical problem of arm combination with the same target load, the length and angle of the main and auxiliary arms are changed according to the same lifting height and the same amplitude of variation, respectively. This paper studies the combination rule of the main and auxiliary arms based on the stability: the length of the main and auxiliary arms and the angle of the main and auxiliary arms have an important influence on the stability of the combined arms. The conclusion can be used as a reference for lifting operation and engineering design.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH21

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本文編號(hào)：2452711