本文關(guān)鍵詞： 全地面起重機(jī) 非線性有限元 起重性能計(jì)算 塔臂工況撐桿　出處：《大連理工大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：全地面起重機(jī)在能源、化工、搶險(xiǎn)、碼頭等場所用途廣泛,當(dāng)在一些高度較高,作業(yè)覆蓋區(qū)域較大的地方,主臂工況吊載滿足不了需要,塔臂工況作為全地面起重機(jī)的重要工況,它的優(yōu)勢則可以在這種場合下得到發(fā)揮。由于塔臂工況產(chǎn)生大變形,利用非線性有限元求解顯得很必要。起重量是衡量起重機(jī)整機(jī)性能的一個(gè)重要標(biāo)志,起重性能表是隨機(jī)交付的重要技術(shù)文檔。臂架等結(jié)構(gòu)的強(qiáng)度是起重性能的重要影響因素,因此對于強(qiáng)度決定的起重性能的計(jì)算就顯得尤為重要。 前、后撐桿是為了滿足塔臂的變幅要求而設(shè)計(jì)的起到支撐作用的桿件,在起臂過程、吊載過程、塔臂變幅過程都是必不可少的。其幾何參數(shù)對臂架構(gòu)件的強(qiáng)度會產(chǎn)生影響,所以研究撐桿的設(shè)計(jì)對臂架強(qiáng)度、關(guān)鍵鉸點(diǎn)受力等力學(xué)性能的影響顯得非常重要。 本文以1200t全地面起重機(jī)為研究對象,重點(diǎn)研究了強(qiáng)度決定的起重性能計(jì)算和撐桿設(shè)計(jì)對臂架力學(xué)性能的影響。本文主要研究內(nèi)容如下： (1)了解全地面起重機(jī)的動(dòng)作原理以及各作業(yè)工況下起重機(jī)的構(gòu)成,根據(jù)全地面起重機(jī)塔臂工況的構(gòu)成特點(diǎn)和受力情況建立全地面起重機(jī)塔臂工況的有限元模型； (2)基于非線性大變形的基本理論,并根據(jù)程序結(jié)構(gòu)構(gòu)建程序的功能塊,實(shí)現(xiàn)整體剛度矩陣組裝,整體載荷組裝,坐標(biāo)矩陣裝換,單元桿端抗力計(jì)算等功能。進(jìn)一步采用牛頓法進(jìn)行迭代求解梁單元的非線性解,實(shí)現(xiàn)了基于梁的大變形理論的非線性節(jié)點(diǎn)力和變形的計(jì)算,并和ANSYS計(jì)算結(jié)果進(jìn)行比較驗(yàn)證程序的正確性； (3)研究起重性能計(jì)算中用到的迭代算法以及怎么保證臂架變形后的工作幅度是起重性能表中需要的工作幅度等,最終得到基于非線性的強(qiáng)度決定的起重性能表： (4)通過臂架強(qiáng)度、關(guān)鍵鉸點(diǎn)受力來評價(jià)前、后撐桿長度是否最優(yōu),以此來進(jìn)行前、后撐桿的長度設(shè)計(jì)。 研究表明,撐桿的幾何參數(shù)對臂架強(qiáng)度等影響較大。同時(shí),本文的研究成果被用到了1200t全地面起重機(jī)的實(shí)際項(xiàng)目開發(fā)當(dāng)中,為全地面起重機(jī)塔臂工況的撐桿設(shè)計(jì)提供了一定的指導(dǎo),該方法具有普遍意義和價(jià)值。
[Abstract]:All ground cranes are widely used in energy, chemical, emergency, wharf and other places. When some places with high height and large area of operation coverage, the main arm load can not meet the need. As an important working condition of all ground crane, the tower arm working condition can give full play to its advantages in this situation, because of the large deformation of tower arm working condition. It is necessary to use nonlinear finite element method to solve the problem. Lifting weight is an important symbol to evaluate the performance of crane. The lifting performance table is an important technical document for random delivery. The strength of the structure such as the boom is an important factor affecting the lifting performance, so the calculation of the lifting performance determined by the strength is particularly important. The front and rear brace is the supporting member designed to meet the requirements of the tower arm, in the process of lifting and lifting. It is necessary to change the amplitude of the tower arm, and its geometric parameters will affect the strength of the arm, so it is very important to study the influence of the design of the brace on the strength of the boom, the force of the key hinge and other mechanical properties. In this paper, 1200t all-ground crane is taken as the research object, and the influence of strength determined lifting performance calculation and brace design on the mechanical properties of boom is studied emphatically. The main contents of this paper are as follows: 1) to understand the operation principle of the all-ground crane and the structure of the crane under various operating conditions. The finite element model of the tower jib working condition of all-ground crane is established according to the structural characteristics and the force condition of the tower arm of the all-ground crane. 2) based on the basic theory of nonlinear large deformation, and according to the program structure, the function block of the program is constructed to realize the assembly of the whole stiffness matrix, the assembly of the whole load, and the installation and replacement of the coordinate matrix. Furthermore, Newton method is used to iteratively solve the nonlinear solution of beam element, and the calculation of nonlinear node force and deformation based on the theory of large deformation of beam is realized. The correctness of the program is verified by comparing the calculation results with ANSYS. 3) studying the iterative algorithm used in the calculation of hoisting performance and how to ensure that the working amplitude after the deformation of the boom is the required working range in the lifting performance table, and so on. Finally, the lifting performance table based on nonlinear strength is obtained. 4) whether the length of the back brace is optimal or not is evaluated by the strength of the boom and the force at the key pivot point, so as to design the length of the front and rear brace. The research shows that the geometric parameters of the brace have a great influence on the strength of the boom. At the same time, the research results of this paper have been used in the actual project development of 1200t all-ground crane. The method is of universal significance and value for the design of brace in tower jib working condition of all ground crane.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TH213

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫剛 ,張海燕 ,盧毅非,吳輝,張良棟,史先信;誰主沉浮?汽車起重機(jī)VS全地面起重機(jī)[J];工程機(jī)械與維修;2004年08期

2 蔡福海;高順德;王欣;;全地面起重機(jī)發(fā)展現(xiàn)狀及其關(guān)鍵技術(shù)探討[J];工程機(jī)械與維修;2006年09期

3 陳昕,王娜;空間索單元的切線剛度矩陣[J];哈爾濱建筑工程學(xué)院學(xué)報(bào);1993年06期

4 史先信;;技術(shù)引領(lǐng)發(fā)展 創(chuàng)新鑄就輝煌——我國全地面起重機(jī)行業(yè)技術(shù)創(chuàng)新發(fā)展之路[J];建設(shè)機(jī)械技術(shù)與管理;2010年10期

5 王小明;盧志強(qiáng);;國內(nèi)外大型起重機(jī)的研究現(xiàn)狀及發(fā)展趨勢[J];機(jī)電產(chǎn)品開發(fā)與創(chuàng)新;2009年02期

6 雷正保;師可力;;汽車起重機(jī)副臂起重特性計(jì)算[J];建筑機(jī)械;1991年11期

7 賈體鋒;張艷俠;;全地面起重機(jī)關(guān)鍵技術(shù)發(fā)展探析[J];建筑機(jī)械;2011年Z1期

8 曾永革;卿篤斌;蔣正輝;;平面桿系幾何非線性有限元程序中的幾個(gè)問題[J];山西建筑;2007年08期

9 周銀亮;;懸索橋幾何非線性分析方法[J];山西建筑;2009年13期

10 李艷艷;高媛;陳禮;滕儒民;孫麗;劉寶隆;;起重機(jī)伸縮臂計(jì)算方法對變形量影響分析[J];起重運(yùn)輸機(jī)械;2012年12期

相關(guān)碩士學(xué)位論文 前10條

1 單增海;大噸位全地面起重機(jī)臂架大變形分析的參數(shù)化軟件開發(fā)[D];吉林大學(xué);2011年

2 王煒杰;汽車起重機(jī)性能計(jì)算及計(jì)算平臺開發(fā)[D];吉林大學(xué);2011年

3 劉東;考慮大變形因素的高空作業(yè)車傾覆穩(wěn)定性研究[D];大連理工大學(xué);2011年

4 劉闞元;全地面起重機(jī)起重性能迭代算法研究[D];大連理工大學(xué);2011年

5 廉偉東;全地面起重機(jī)副臂解析法計(jì)算程序的開發(fā)[D];吉林大學(xué);2007年

6 馬青;履帶起重機(jī)臂架有限元簡化模型穩(wěn)定性分析[D];大連理工大學(xué);2009年

7 姚嘉;全地面起重機(jī)性能計(jì)算及有限元分析[D];吉林大學(xué);2009年

8 卜筠燕;基于有限元的臂架系統(tǒng)非線性分析方法研究及應(yīng)用[D];大連理工大學(xué);2008年

9 李艷艷;全地面起重機(jī)臂架算法對變形量的影響分析[D];大連理工大學(xué);2012年

10 陸霞;履帶起重機(jī)多重臂架組合系統(tǒng)優(yōu)化設(shè)計(jì)研究[D];大連理工大學(xué);2012年

，

本文編號：1478583