【摘要】：社會(huì)的進(jìn)步和經(jīng)濟(jì)的高速發(fā)展促進(jìn)了建筑行業(yè)的發(fā)展。塔式起重機(jī)作為建筑行業(yè)中不可或缺的施工設(shè)備,在這一過(guò)程中起到了舉足輕重的作用,我國(guó)已經(jīng)邁入了塔機(jī)大國(guó)這一行列。針對(duì)撫順永茂建筑機(jī)械有限公司的需求,研究開發(fā)了20000KNm級(jí)的ST80/238塔式起重機(jī),其新穎的倒三角形起重臂結(jié)構(gòu)形式,目前市場(chǎng)上很少能見(jiàn)到。本文研究了起重臂結(jié)構(gòu)的工作狀態(tài)和受到的載荷,并運(yùn)用ANSYS軟件全面地分析了臂架的受力狀態(tài),為起重臂的安全可靠工作提供了保證,也為未來(lái)同類產(chǎn)品的研究開發(fā)奠定了技術(shù)基礎(chǔ)。主要的研究?jī)?nèi)容如下： (1)對(duì)起重臂桿件的受力狀態(tài)進(jìn)行研究,得出了起重臂臂根處桿件,起重臂腹桿及主肢的受力特點(diǎn)及原因；研究了斜桁架斜腹桿布局方式對(duì)周圍桿件受力狀態(tài)的影響,指出了倒三角形起重臂與正三角形起重臂腹桿的傳力方式和受力的特點(diǎn)不同之處,并根據(jù)研究的成果對(duì)倒三角形起重臂桿件的選取提出了建議,為倒三角形起重臂系統(tǒng)的設(shè)計(jì)和研究提供參考； (2)分析了無(wú)輪壓作用的下弦桿單節(jié)間結(jié)構(gòu)的受力狀態(tài),得出了下弦桿上翼緣板、腹板及下翼緣板的受力特點(diǎn)并分析原因； (3)通過(guò)改變翼緣板和腹板厚度,研究了下弦桿單節(jié)間結(jié)構(gòu)的受力狀態(tài),得出了上翼緣板及腹板厚度變化對(duì)斜桁架腹桿與下弦桿連接位置的受力及撓度影響,為下弦桿的研究提供相關(guān)數(shù)據(jù)及信息： (4)研究了下弦桿在輪壓作用下的受力狀態(tài),得到了輪壓的作用位置與下弦桿翼緣板和腹板受力的關(guān)系,指出了輪壓對(duì)腹板和下翼緣板的翹曲有影響,應(yīng)嚴(yán)格考核它們的剛度； (5)根據(jù)ST80/238塔機(jī)的倒三角形起重臂自身特點(diǎn),本著設(shè)計(jì)合理,結(jié)構(gòu)新穎,經(jīng)濟(jì)合理,方便安拆,安全可靠的原則,結(jié)合ANSYS軟件對(duì)拉索受力分析結(jié)果,得出了拉索的受力特點(diǎn),設(shè)計(jì)了雙吊點(diǎn)-四拉索結(jié)構(gòu)。該拉索結(jié)構(gòu)能夠?qū)崿F(xiàn)起重臂的動(dòng)作要求、有別于以往拉桿的結(jié)構(gòu)形式、安裝和拆卸簡(jiǎn)單易行、并嚴(yán)格考核強(qiáng)度條件,確定了該拉索結(jié)構(gòu)的設(shè)計(jì)是合理的。 本課題的研究成果對(duì)倒三角形起重臂塔式起重機(jī)的研究設(shè)計(jì)提供了可參考的數(shù)據(jù),有利于塔式起重機(jī)的發(fā)展和技術(shù)創(chuàng)新。
[Abstract]:Social progress and high-speed economic development have promoted the development of the construction industry. Tower crane, as an indispensable construction equipment in the construction industry, has played an important role in this process. According to the demand of Fushun Yongmao Construction Machinery Co., Ltd, the ST80/238 tower crane of 20000KNm class is researched and developed. In this paper, the working state and load of the lifting arm structure are studied, and the stress state of the boom is analyzed by using ANSYS software, which provides a guarantee for the safe and reliable work of the lifting arm. Also for the future research and development of similar products laid a technical foundation. The main research contents are as follows: (1) the stress state of the lifting arm member is studied, and the force characteristics and reasons of the lifting arm root member, the lifting arm web rod and the main limb are obtained. In this paper, the influence of the layout of oblique web bar of oblique truss on the stress state of the surrounding member is studied, and the difference between the force transfer mode and the force characteristics of the inverted triangle lifting arm and the equilateral triangle lifting arm web member is pointed out. According to the results of the research, some suggestions are put forward for the selection of the inverted triangle lifting arm, which provides a reference for the design and research of the inverted triangle lifting arm. (2) the stress state of the single section structure of the lower chord without wheel compression is analyzed, and the stress characteristics of the upper flange plate, web plate and lower flange plate of the lower chord are obtained and the reasons are analyzed. (3) by changing the thickness of the flange plate and the web plate, the stress state of the single section structure of the lower chord is studied, and the influence of the thickness of the upper flange plate and the web plate on the connecting position of the web bar and the lower chord of the oblique truss is obtained. This paper provides relevant data and information for the study of the lower chord: (4) the stress state of the lower chord under the wheel pressure is studied, and the relationship between the position of the wheel pressure and the force on the flange plate and web plate of the lower chord is obtained. It is pointed out that wheel pressure has an effect on the warpage of web plate and lower flange plate, and their stiffness should be evaluated strictly. (5) according to the characteristics of the inverted triangle lifting arm of ST80/238 tower crane, based on the principle of reasonable design, novel structure, reasonable economy, convenient installation, safe and reliable, combined with the result of the analysis of cable force by ANSYS software, The stress characteristics of cable are obtained, and the double-point-four-cable structure is designed. The cable structure can realize the action requirement of the lifting arm, which is different from the structure form of the traditional pull rod. The installation and disassembly are simple and easy, and the strength condition is strictly checked. The design of the cable structure is determined to be reasonable. The research results of this paper provide the reference data for the research and design of the inverted triangle jib crane, which is beneficial to the development and technical innovation of the tower crane.
【學(xué)位授予單位】：沈陽(yáng)建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TH213.3

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