發(fā)布時(shí)間：2018-06-29 21:43

  本文選題：履帶起重機(jī) + 隨機(jī)有限元�。� 參考：《太原科技大學(xué)》2013年碩士論文

【摘要】：隨著國內(nèi)大型工程項(xiàng)目的快速投建，整體吊裝工程越來越普遍，這也直接導(dǎo)致了對吊裝起重機(jī)的整體起重能力、作業(yè)范圍和作業(yè)高度的要求越來越大，履帶起重機(jī)得到了快速、高效的發(fā)展。格構(gòu)式臂架作為履帶起重機(jī)工作時(shí)的主要承載構(gòu)件，決定著整機(jī)的起重能力、作業(yè)范圍和作業(yè)高度，其力學(xué)性能對整機(jī)的安全使用有直接影響，對整機(jī)結(jié)構(gòu)起著舉足輕重的作用。由于起重機(jī)在生產(chǎn)生活中的重要地位，臂架結(jié)構(gòu)的工作可靠性相對于其它結(jié)構(gòu)顯得尤為重要。進(jìn)行臂架可靠性分析可有效的避免其工作時(shí)安全事故的發(fā)生，提高勞動(dòng)生產(chǎn)效率。 本文以某型履帶起重機(jī)格構(gòu)式臂架為對象，首先通過研究分析確定臂架的計(jì)算方法并建立了計(jì)算模型。根據(jù)《GB/T3811—2008起重機(jī)設(shè)計(jì)規(guī)范》,確定了臂架載荷情況及載荷組合，采用許用應(yīng)力法對臂架進(jìn)行強(qiáng)度、剛度、穩(wěn)定性計(jì)算，并對計(jì)算結(jié)果進(jìn)行校核以滿足使用要求。其次使用現(xiàn)代設(shè)計(jì)方法中的有限元方法進(jìn)行格構(gòu)式臂架的大變形、非線性問題進(jìn)行仿真校核；本課題結(jié)合實(shí)際工況，利用成熟的商業(yè)軟件Workbench對格構(gòu)式臂架進(jìn)行受力幾何非線性變形分析。各種外部激勵(lì)振動(dòng)對臂架的工作造成很大影響，為了避免因這些激勵(lì)因素引起工作臂架的共振并進(jìn)行模態(tài)分析和屈曲分析，得出臂架的固有頻率與使臂架發(fā)生屈曲的臨界壓應(yīng)力，對臂架的設(shè)計(jì)改進(jìn)提供技術(shù)支持。最后在靜力分析的基礎(chǔ)上采用隨機(jī)有限元法中的蒙特卡羅法對格構(gòu)式臂架進(jìn)行可靠性分析，，得出臂架在固定工況條件下的可靠度。 綜上所述，本文對履帶起重機(jī)格構(gòu)式主臂進(jìn)行的設(shè)計(jì)計(jì)算、有限元分析以及可靠性分析，是現(xiàn)代設(shè)計(jì)方法在起重機(jī)上的具體應(yīng)用，對臂架結(jié)構(gòu)工作的安全性和經(jīng)濟(jì)性有非常重要的意義，具有一定的工程實(shí)際應(yīng)用價(jià)值。
[Abstract]:With the rapid construction of large engineering projects in China, the whole hoisting project is becoming more and more common, which directly leads to the requirements of lifting crane's overall lifting capacity, operation scope and operation height, and the crawler crane is getting faster and faster. Efficient development. As the main bearing member of crawler crane, lattice boom determines the lifting capacity, working range and working height of the whole crane, and its mechanical properties have a direct impact on the safe use of the whole machine. It plays an important role in the whole machine structure. Because of the important position of crane in production and life, the work reliability of boom structure is more important than other structures. The reliability analysis of the boom can effectively avoid the occurrence of safety accidents and improve the efficiency of labor production. In this paper, the lattice jib of a crawler crane is taken as the object. Firstly, the calculation method of the jib is determined through research and analysis, and the calculation model is established. According to "GB / T 3811-2008 Crane Design Code", the load situation and load combination of boom are determined. The strength, stiffness and stability of boom are calculated by allowable stress method, and the calculation results are checked to meet the requirements of application. Secondly, the finite element method of modern design method is used to carry out the large deformation of the lattice boom, and the nonlinear problem is simulated and checked. The geometric nonlinear deformation analysis of lattice boom is carried out by using the mature commercial software Workbench. All kinds of external excitation vibration have great influence on the work of the boom. In order to avoid resonance caused by these excitation factors, modal analysis and buckling analysis are carried out. The natural frequency of the boom and the critical compressive stress of buckling are obtained, which provide technical support for the improvement of the design of the boom. Finally, on the basis of static analysis, Monte Carlo method of stochastic finite element method is used to analyze the reliability of the lattice boom, and the reliability of the boom under fixed working conditions is obtained. To sum up, the design calculation, finite element analysis and reliability analysis of the lattice main arm of crawler crane are the concrete application of modern design method in crane. It is of great significance to the safety and economy of boom structure, and has certain practical application value.
【學(xué)位授予單位】：太原科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH213.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 董聰,楊慶雄;冗余桁架結(jié)構(gòu)系統(tǒng)可靠性分析理論與算法[J];計(jì)算力學(xué)學(xué)報(bào);1992年04期

2 尹健;隨機(jī)有限元在結(jié)構(gòu)強(qiáng)度可靠性分析中的應(yīng)用[J];貴州工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);1998年02期

3 李海波,劉宗民,楊洪瀾;多隨機(jī)變量的桁架結(jié)構(gòu)系統(tǒng)的可靠性分析及優(yōu)化設(shè)計(jì)[J];強(qiáng)度與環(huán)境;2002年02期

4 鄧華,董石麟;拉索預(yù)應(yīng)力空間網(wǎng)格結(jié)構(gòu)的優(yōu)化設(shè)計(jì)[J];計(jì)算力學(xué)學(xué)報(bào);2000年02期

5 陳清安,王建梅;空間桁架幾何非線性分析[J];西安科技學(xué)院學(xué)報(bào);1999年S1期

6 張萍;ANSYS建模過程中單元屬性的定義[J];現(xiàn)代電子技術(shù);2003年16期

7 王凱,周慎杰;80噸履帶起重機(jī)桁架式臂架系統(tǒng)的有限元分析[J];機(jī)械設(shè)計(jì)與研究;2005年05期

8 劉正興，正勁松;隨機(jī)有限元在結(jié)構(gòu)可靠性分析中的應(yīng)用[J];上海交通大學(xué)學(xué)報(bào);1994年01期

相關(guān)碩士學(xué)位論文 前5條

1 馬超;結(jié)構(gòu)可靠性若干專題研究[D];西北工業(yè)大學(xué);2007年

2 陳長雷;船體局部結(jié)構(gòu)可靠性分析[D];哈爾濱工程大學(xué);2007年

3 張彥飛;RC橋梁壽命的可靠度分析方法研究[D];長安大學(xué);2005年

4 辛宏彥;大型履帶起重機(jī)超長臂架系統(tǒng)非線性方法研究[D];大連理工大學(xué);2006年

5 趙二飛;起重機(jī)臂架穩(wěn)定性分析[D];吉林大學(xué);2007年

本文編號(hào)：2083465