本文選題：液壓頂升平橋 + 動(dòng)態(tài)特性�。� 參考：《東北大學(xué)》2012年碩士論文

【摘要】：隨著世界對(duì)能源需求的急劇增長(zhǎng),用于冷卻循環(huán)水的大型冷卻塔越來越大,塔體也越來越高,高達(dá)180m以上。本課題為“十一五”規(guī)劃課題,主要以國(guó)內(nèi)冷卻塔專用施工設(shè)備—液壓頂升平橋?yàn)檠芯繉?duì)象,研究其動(dòng)態(tài)特性及編制柔性附著計(jì)算軟件。 利用有限元軟件ANSYS,對(duì)處于獨(dú)立高度且無柔性附著的液壓頂升平橋進(jìn)行建模。通過平橋載荷特性曲線確定靜力計(jì)算工況,通過應(yīng)力比較確定最危險(xiǎn)工況,其應(yīng)力與應(yīng)力測(cè)試結(jié)果相吻合,驗(yàn)證平橋的有限元模型的正確性；并且利用ANSYS軟件對(duì)液壓頂升平橋進(jìn)行動(dòng)力學(xué)分析,計(jì)算不同起升速度的起升動(dòng)載荷系數(shù)。當(dāng)起升速度在某范圍內(nèi),動(dòng)載荷系數(shù)隨起升速度的增加而顯著增大；超過該范圍,動(dòng)載荷系數(shù)變化較平緩。根據(jù)對(duì)3種典型工況的計(jì)算分析,通過應(yīng)力比較,確定出吊重離地起升與回轉(zhuǎn)復(fù)合工況最危險(xiǎn),其最大應(yīng)力是靜力分析時(shí)應(yīng)力的1.5倍左右,為平橋的初步設(shè)計(jì)和動(dòng)態(tài)特性研究提供技術(shù)支持。 當(dāng)平橋橋身高度超過獨(dú)立高度時(shí),為保證橋身的結(jié)構(gòu)穩(wěn)定與工作平穩(wěn),須采用多層帶有預(yù)拉力的鋼絲繩加以柔性附著。將液壓頂升平橋的橋身與附著鋼絲繩作為橋身系統(tǒng)來考慮。采用ANSYS軟件對(duì)2層附著的橋身系統(tǒng)進(jìn)行靜動(dòng)力學(xué)分析,動(dòng)力分析計(jì)算的最大應(yīng)力約為靜力時(shí)應(yīng)力的2.4倍,橋身頂端的位移是靜力時(shí)位移的7倍左右,且附著鋼絲繩的拉力也有所增加。因此,對(duì)橋身系統(tǒng)進(jìn)行動(dòng)力學(xué)分析是非常必要的。 根據(jù)柔性附著的分析與計(jì)算,以VB6.0和Matlab7.0作為程序設(shè)計(jì)語言,并動(dòng)態(tài)連接Excell2003及Acess2003,開發(fā)柔性附著計(jì)算軟件。該軟件具有數(shù)值計(jì)算、曲線繪圖、保存、查找、刪除、打印及生成報(bào)表等功能。此軟件為平橋柔性附著專用計(jì)算軟件,開創(chuàng)了柔性附著計(jì)算軟件編制的先河,方便設(shè)計(jì)者設(shè)計(jì)計(jì)算,減小設(shè)計(jì)工作量,縮短設(shè)計(jì)周期,對(duì)平橋的設(shè)計(jì)起到了積極促進(jìn)作用。
[Abstract]:With the rapid increase of energy demand in the world, the large cooling tower used for cooling circulating water is becoming larger and larger, and the tower body is more and more high, up to more than 180m. This subject is the "11th Five-Year Plan" project, mainly takes the domestic cooling tower special construction equipment-hydraulic jacking flat bridge as the research object, studies its dynamic characteristic and compiles the flexible attachment calculation software. The finite element software ANSYSwas used to model the hydraulic jacking flat bridge with independent height and no flexible attachment. The static calculation condition is determined by the load characteristic curve of the horizontal bridge and the most dangerous condition is determined by the stress comparison. The results of the stress and stress test are in agreement with each other, which verifies the correctness of the finite element model of the horizontal bridge. The dynamic analysis of hydraulic jacking bridge is carried out by using ANSYS software, and the lifting load coefficient of different lifting speed is calculated. When the lifting speed is in a certain range, the dynamic load coefficient increases significantly with the increase of the lifting speed, and the change of the dynamic load coefficient is slower than that of the rising speed. According to the calculation and analysis of the three typical working conditions, through the stress comparison, it is determined that the composite working condition of hoisting and rotary hoisting is the most dangerous, and the maximum stress is about 1.5 times of the stress in static analysis. It provides technical support for the preliminary design and dynamic characteristic study of the flat bridge. When the height of the bridge body is higher than the independent height, in order to ensure the stability and stability of the bridge body, the multi-layer wire rope with pretension should be used for flexible attachment. The bridge body and attached wire rope of hydraulic jacking flat bridge are considered as bridge body system. The static and dynamic analysis of the two-story attached bridge system is carried out by using ANSYS software. The maximum stress calculated by dynamic analysis is about 2.4 times of the static stress, and the displacement at the top of the bridge is about 7 times that of the static displacement. The tensile force of the attached wire rope is also increased. Therefore, the dynamic analysis of bridge system is very necessary. According to the analysis and calculation of flexible attachment, the flexible attachment calculation software is developed by using VB6.0 and Matlab7.0 as programming languages and connecting Excell2003 and Acess 2003 dynamically. The software has the functions of numerical calculation, curve drawing, saving, searching, deleting, printing and generating reports. This software is a special calculation software for flexible attachment of flat bridges, which is the first to compile flexible attachment calculation software. It is convenient for designers to design and calculate, reduces the workload of design, shortens the design period, and plays an active role in promoting the design of flat bridges.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH21;TH137

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 梁新成;黃志剛;朱慧;;VB與Matlab混合編程的研究[J];北京工商大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年01期

2 王蔚佳;劉成毅;鐘偉;李正良;;混合動(dòng)態(tài)子結(jié)構(gòu)綜合法在塔機(jī)動(dòng)力學(xué)分析中的應(yīng)用[J];重慶大學(xué)學(xué)報(bào);2011年08期

3 葉元華;無塔帽塔式起重機(jī)起重特性曲線的確定[J];工程機(jī)械;1995年11期

4 顧永強(qiáng);李茗;朱承君;;塔式起重機(jī)塔身結(jié)構(gòu)的模態(tài)分析與響應(yīng)計(jì)算[J];內(nèi)蒙古科技大學(xué)學(xué)報(bào);2009年02期

5 黃珊秋，孫家林;塔機(jī)動(dòng)態(tài)特性的研究[J];哈爾濱理工大學(xué)學(xué)報(bào);1997年02期

6 韓守習(xí),張大可;基于SIMULINK的起重機(jī)起升機(jī)構(gòu)動(dòng)態(tài)仿真[J];重慶建筑大學(xué)學(xué)報(bào);2003年06期

7 王躍強(qiáng),王紀(jì)龍,王云才;VB程序中實(shí)現(xiàn)調(diào)用MATLAB的方法[J];計(jì)算機(jī)應(yīng)用;2001年02期

8 張明勤,張瑞軍,董明曉,沙麗云;塔式起重機(jī)結(jié)構(gòu)體系動(dòng)態(tài)分析計(jì)算工況的選擇[J];建筑機(jī)械化;2002年05期

9 曲振波,張明勤,孫小麗,宋傳增,董明曉;塔式起重機(jī)結(jié)構(gòu)體系激振載荷的確定[J];建筑機(jī)械化;2003年08期

10 鄭夕健;謝正義;張國(guó)忠;陳紅軍;;有限元單元在塔機(jī)分析中的應(yīng)用[J];建筑機(jī)械化;2007年02期

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