本文關(guān)鍵詞： 混凝土泵車 臂架 有限元分析 多體動力學(xué)分析 模態(tài)分析 結(jié)構(gòu)應(yīng)力試驗 拓?fù)鋬?yōu)化　出處：《湖南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著房地產(chǎn)與建筑行業(yè)的繁榮進(jìn)步，混凝土泵車應(yīng)用愈加廣泛，市場發(fā)展空間進(jìn)一步擴(kuò)大。因此，對混凝土泵車關(guān)鍵部件尤其臂架系統(tǒng)的性能和質(zhì)量要求越來越高。近年來，混凝土泵車臂架有兩大發(fā)展趨勢：首先是臂架越來越長，市場所主要需求的泵車也日趨向長臂架品種方向發(fā)展。其次是臂架越來越輕，在設(shè)計方面，新構(gòu)造的大膽應(yīng)用使得輕量化設(shè)計水平不斷提高。然而一般來說，泵車臂架向大跨徑及輕量化方向發(fā)展的同時，臂架固有頻率趨于降低，更容易引起臂架的振動。高強鋼和碳纖維增強復(fù)合材料(CFK)等材料對于應(yīng)力集中和缺陷十分敏感，在振動引起的大應(yīng)力幅值下，對設(shè)計和工藝的要求更為嚴(yán)格，處理稍有不周即會帶來嚴(yán)重的后果。針對新的泵車臂架結(jié)構(gòu)形式，其作業(yè)精度與動態(tài)可靠性如何是目前面臨的現(xiàn)實問題，而如何在臂架向大跨徑、輕量化發(fā)展的同時保證臂架優(yōu)良的動靜態(tài)特性，利用先進(jìn)的動態(tài)優(yōu)化設(shè)計方法提升臂架設(shè)計水平是長期關(guān)注的方向。 本文擬針對中聯(lián)-CIFA雙品牌47米混凝土泵車臂架，研究新的結(jié)構(gòu)形式下大跨徑臂架的動態(tài)可靠性，并提出相應(yīng)的設(shè)計建議；進(jìn)而，基于動態(tài)優(yōu)化設(shè)計理論，探索在保證臂架動靜態(tài)性能的前提下，進(jìn)一步進(jìn)行輕量化設(shè)計研究，論文主要研究內(nèi)容如下： （1）建立有限元分析模型，并基于傳統(tǒng)的等效靜載方法進(jìn)行強度、剛度和穩(wěn)定性的校核，以了解臂架的靜力特性，然后根據(jù)混凝土泵車行業(yè)標(biāo)準(zhǔn)中對應(yīng)力測試所規(guī)定的內(nèi)容對臂架進(jìn)行應(yīng)力測試，以此驗證仿真與計算分析結(jié)果的準(zhǔn)確度。 （2）建立柔性多體動力學(xué)模型遍歷臂架可能的各種姿態(tài)，基于各節(jié)臂上不同區(qū)域的應(yīng)力變化確定臂架的危險工況，及對危險工況下的臂架可靠性進(jìn)行評估。 （3）進(jìn)行模態(tài)分析，以探索臂架的動態(tài)特性，，并尋找最有可能與泵送頻率合拍的臂架姿態(tài)；然后對多種泵送工況、多種臂架姿態(tài)下臂架端部運動幅值和危險區(qū)域動應(yīng)力進(jìn)行預(yù)測，并據(jù)此評估臂架結(jié)構(gòu)的動態(tài)可靠性。 （4）最后綜合運用拓?fù)洹⑿螤詈统叽鐑?yōu)化設(shè)計技術(shù)，在保證結(jié)構(gòu)件工作性能和安全性的前提下減輕其重量，探索極限輕量化要求下的泵車臂架結(jié)構(gòu)形式。
[Abstract]:With the prosperity and progress of the real estate and construction industry, the application of concrete pump vehicles is becoming more and more extensive, and the market development space is further expanded. The performance and quality of the key parts of concrete pump vehicle, especially the boom system, are becoming more and more high. In recent years, there are two major trends in the development of concrete pump truck boom: first, the boom is getting longer and longer. The main demand of the market for pump cars is also increasingly toward the direction of long boom varieties. Secondly, the boom is getting lighter and lighter. In design, the bold application of the new structure makes the level of lightweight design continuously improved. However, generally speaking. At the same time, the natural frequency of the boom tends to decrease as the boom develops towards the direction of long span and light weight. Materials such as high strength steel and carbon fiber reinforced composites (CFK) are sensitive to stress concentration and defects under the high stress amplitude caused by vibration. The requirements of the design and process are more stringent, which will bring serious consequences if the treatment is not well done. In view of the new structure form of boom of pump car, how to operate precision and dynamic reliability is a realistic problem. However, how to ensure the excellent dynamic and static characteristics of the boom while developing to a large span and lightweight, and how to improve the design level of the boom by using the advanced dynamic optimization design method is a long-term concern. In this paper, the dynamic reliability of the long-span boom under the new structure is studied, and the corresponding design suggestions are put forward for the 47 m concrete pump boom of Zhonglian CIFA double brand. Then, based on the theory of dynamic optimal design, this paper explores the further research on lightweight design under the premise of ensuring the dynamic and static performance of the boom. The main contents of this paper are as follows: 1) the finite element analysis model is established, and the strength, stiffness and stability are checked based on the traditional equivalent static load method to understand the static characteristics of the boom. Then according to the content of stress test in the industry standard of concrete pump car, the stress of the boom is tested, and the accuracy of the simulation and calculation results is verified. (2) the flexible multi-body dynamic model is established to traverse the various possible positions of the boom, and the dangerous conditions of the boom are determined based on the stress changes in different regions of each arm. And to evaluate the reliability of the boom under dangerous working conditions. (3) Modal analysis is carried out to explore the dynamic characteristics of the boom and to find out the most likely attitude of the boom in keeping with the pumping frequency. Then the amplitude of the end motion and the dynamic stress of the dangerous region are predicted under various pumping conditions and various boom positions, and the dynamic reliability of the boom structure is evaluated accordingly. Finally, the optimum design technology of topology, shape and size is used to reduce the weight of the structure under the premise of ensuring the working performance and safety of the structure, and to explore the structure form of the boom of the pump vehicle under the requirement of extreme lightweight.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU646

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張德恒;鹿曉陽;;結(jié)構(gòu)拓?fù)鋬?yōu)化設(shè)計的理論與方法[J];化學(xué)工程與裝備;2011年01期

2 劉宏昭,曹惟慶;多柔體系統(tǒng)動力學(xué)方程一種數(shù)值求解方法[J];計算結(jié)構(gòu)力學(xué)及其應(yīng)用;1991年03期

3 馮楨;于濤;曾齊福;;拓?fù)鋬?yōu)化方法在產(chǎn)品設(shè)計中的應(yīng)用探索[J];機(jī)械設(shè)計與制造;2007年03期

4 張艷偉,佟力,孫國正;基于ANSYS的混凝土泵車臂架結(jié)構(gòu)分析研究[J];武漢理工大學(xué)學(xué)報(交通科學(xué)與工程版);2004年04期

5 吳學(xué)松;國內(nèi)混凝土泵車發(fā)展概況[J];建筑機(jī)械化;2004年03期

6 李家武;徐懷玉;丁美蓮;孫麗;;混凝土泵車布料臂的發(fā)展及趨勢[J];建筑機(jī)械化;2005年11期

7 王永偉;;IPF-85B型混凝土泵車的動態(tài)分析[J];建筑機(jī)械;1987年02期

8 郭崗;許輝;;混凝土泵車臂架結(jié)構(gòu)的幾何非線性計算[J];建筑機(jī)械;2007年05期

9 史先信;鄭永生;徐懷玉;馮敏;張鵬程;;基于ANSYS的大型泵車臂架有限元分析[J];建筑機(jī)械;2009年07期

10 趙麗紅,郭鵬飛,孫洪軍,寧麗莎;結(jié)構(gòu)拓?fù)鋬?yōu)化設(shè)計的發(fā)展、現(xiàn)狀及展望[J];遼寧工學(xué)院學(xué)報;2004年01期

相關(guān)博士學(xué)位論文 前2條

1 郭立群;商用車車架拓?fù)鋬?yōu)化輕量化設(shè)計方法研究[D];吉林大學(xué);2011年

2 戴麗;基于柔性多體動力學(xué)的混凝土泵車臂架系統(tǒng)的建模與仿真[D];東北大學(xué);2008年

本文編號：1479119