本文關(guān)鍵詞： 全地面起重機(jī) 非線性 ANSYS APDL 變形量　出處：《大連理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：全地面起重機(jī)在工廠、碼頭、建筑工地、礦山等場(chǎng)地有著廣泛的用途。為實(shí)現(xiàn)起重機(jī)大起升高度和大幅度,主臂與副臂的組合方式得到了廣泛應(yīng)用。大起升高度和大幅度時(shí)的起重量逐漸成為衡量起重機(jī)性能的一個(gè)重要指標(biāo)。起重能力是由一定臂長(zhǎng)和幅度下的額定起重量定義的,而額定起重量又反過(guò)來(lái)影響著幅度,因此在設(shè)計(jì)過(guò)程中必須考慮臂架變形的影響。 目前在起重性能的計(jì)算和變形的計(jì)算上有了一些研究,但并沒(méi)有深入研究起重量對(duì)變形的影響。換而言之,在對(duì)起重性能進(jìn)行確定時(shí)沒(méi)有相關(guān)文獻(xiàn)討論起重量對(duì)變形量的影響。 本文以某500t全地面起重機(jī)臂架系統(tǒng)為研究對(duì)象,從線性、非線性理論出發(fā),僅針對(duì)臂架強(qiáng)度決定的起重性能,研究主臂工況和塔式副臂工況下不同理論對(duì)臂架變形量的影響規(guī)律。具體研究工作如下： (1)研究全地面起重機(jī)的作業(yè)工況和臂架工作原理,選取主臂工況和塔式副臂工況為研究對(duì)象,在充分了解臂架結(jié)構(gòu)特點(diǎn)的基礎(chǔ)上對(duì)臂架各部分進(jìn)行模型簡(jiǎn)化并建立兩種工況下臂架的有限元模型。對(duì)此兩種工況下簡(jiǎn)化模型和復(fù)雜模型進(jìn)行對(duì)比,驗(yàn)證本文簡(jiǎn)化模型的正確性。 (2)研究有限元參數(shù)化建模思想,采用比例迭代法利用ANSYS有限元軟件的APDL語(yǔ)言編寫(xiě)求解最大起重量的計(jì)算程序,實(shí)現(xiàn)線性、非線性理論下不同工況的循環(huán)求解。 (3)用MATLAB對(duì)有限元結(jié)果進(jìn)行處理,通過(guò)對(duì)不同初始變幅角、主臂臂長(zhǎng)和塔式副臂臂長(zhǎng)等因素的研究,得出線性、非線性理論對(duì)臂架變形的影響規(guī)律。 研究結(jié)果表明,隨著主臂臂長(zhǎng)、塔臂臂長(zhǎng)以及初始變幅角的增加,剛性、線性、非線性對(duì)變形量的影響差別越來(lái)越大。因此,在臂長(zhǎng)較短或者臂長(zhǎng)較長(zhǎng)初始變幅角較小時(shí),可用線性模型代替非線性模型,以提高計(jì)算效率。本文研究成果為同類型全地面起重機(jī)臂架系統(tǒng)有限元模型的簡(jiǎn)化提供借鑒,為臂架系統(tǒng)的設(shè)計(jì)、分析提供了參考,同時(shí)為更準(zhǔn)確合理的計(jì)算起重性能提供依據(jù)。
[Abstract]:All-ground cranes have a wide range of applications in factories, docks, construction sites, mines and so on. The combination of the main arm and the accessory arm has been widely used. The lifting capacity is defined by the rated lifting weight at a certain arm length and amplitude, and the lifting weight is gradually becoming an important index to measure the performance of the crane. The impact of boom deformation must be considered in the design process. There has been some research on the calculation of hoisting performance and deformation, but the effect of lifting weight on deformation has not been studied in depth. In other words, The influence of lifting weight on deformation is not discussed in the relevant literature when the crane performance is determined. In this paper, the jib system of a 500t all-ground crane is taken as the research object. Based on the linear and nonlinear theory, only the lifting performance determined by the strength of the boom is considered. This paper studies the influence of different theories on the deformation of the boom under the main arm condition and the tower side arm condition. The specific research work is as follows:. 1) the working conditions and the working principle of the boom are studied, and the main arm condition and the tower side arm condition are selected as the research objects. On the basis of fully understanding the structural characteristics of the boom, the model of each part of the boom is simplified and the finite element model of the boom under two working conditions is established, and the simplified model and the complex model under these two conditions are compared. The correctness of the simplified model is verified. 2) the idea of parameterized finite element modeling is studied. The proportional iterative method is used to compile the calculation program for solving the maximum lifting weight by using the APDL language of ANSYS finite element software to realize the cyclic solution of different working conditions under the linear and nonlinear theory. MATLAB is used to deal with the finite element results. The influence of linear and nonlinear theory on the deformation of the boom is obtained by studying the factors such as the different initial amplitude variation angle, the length of the main arm and the arm length of the tower type accessory arm. The results show that with the increase of the length of the main arm, the length of the tower arm and the initial angle of variation, the effects of rigidity, linearity and nonlinearity on the deformation are more and more different. Therefore, when the length of the arm is shorter or the initial amplitude angle of the length of the arm is longer, the effect of stiffness, linearity and nonlinearity on the deformation is more and more significant. The linear model can be used instead of the nonlinear model in order to improve the calculation efficiency. The research results in this paper provide a reference for the simplification of the finite element model of the boom system of the same type of all-ground crane, and for the design and analysis of the boom system. At the same time, it provides the basis for more accurate and reasonable calculation of lifting performance.
【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

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 張景坡;考慮大變形的全地面起重機(jī)塔臂工況撐桿設(shè)計(jì)研究[D];大連理工大學(xué);2013年

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本文編號(hào)：1541916