本文選題：自升式塔機　切入點：頂升套架　出處：《哈爾濱工業(yè)大學》2012年碩士論文

【摘要】：伴隨著高層建筑的增多及施工的需要，塔機日趨向著高聳化方向發(fā)展，出現(xiàn)了自行升高的塔機。塔機頂升時受力情況復雜，尤其風載荷具有一定的隨機性。到目前為止，頂升工況時結構受力分析及頂升參數(shù)調整暫無通行的方法，相關研究工作及規(guī)范對于突發(fā)風載荷的處理尚無明確說法。制造商根據(jù)規(guī)范，要求操作人員在風速大于一定值時不允許開始頂升，并未指出頂升過程中，結構承受何種風載荷下繼續(xù)安全頂升、停止頂升，或者進行下降作業(yè)。面對缺乏相關規(guī)范情況下，給頂升操作人員提供實用有效的處理突發(fā)狀況下的指導，本文力圖在這方面取得進展。 本文設計了起升力矩為800t·m的水平臂塔式起重機，并以此塔機為例，計算了結構所受風載荷。 頂升套架是頂升工況的主要受力結構，根據(jù)塔機頂升工況的工作特點，分析了無風頂升時頂升套架受力情況，以及影響受力的各種因素。根據(jù)力學原理，分析了載荷變化對受力滾輪的影響。分析了水平臂塔式起重機平衡調整策略，列寫了滾輪壓力變化函數(shù)式。 根據(jù)頂升套架受力特點，，設計了可展開腹桿，以應對突發(fā)風載荷時，為引進標準節(jié)而不能布置腹桿的頂升套架開口一側的剛度不足。 建立了塔機頂升工況系統(tǒng)有限元模型。根據(jù)實際情況對塔機作出了合理的簡化，建立了頂升套架及與之接觸的標準節(jié)的有限元模型。確定了以風速和風向為參數(shù)，并向頂升套架簡化的風載荷的函數(shù)表達式。在已經(jīng)調整平衡的前提下，施加某方向、一定風速的風載荷，求解了頂升套架與標準節(jié)的應力，并針對不同的桿件校核了其強度失效和穩(wěn)定性失效。 通過多次試算分析，確定了某種風向下，頂升工況安全頂升時所能承受最大風載荷，并按規(guī)律不斷改變風向，重復計算分析有限元結果，得到了360°周向風載荷的安全頂升風速-風向矢量表，以便為頂升操作人員提供指導。
[Abstract]:With the increase of high-rise buildings and the need of construction, tower cranes are gradually developing towards the direction of towering, and self-elevating tower cranes appear.The load of tower crane is complicated, especially the wind load is random.Up to now, the method of structural force analysis and the adjustment of hoisting parameters have not been adopted, and there is no clear explanation about the treatment of sudden wind load in relevant research work and code.In the face of the lack of relevant norms, this paper tries to make progress in this area by providing practical and effective guidance to elevating operators in dealing with unexpected situations.In this paper, a horizontal jib crane with a lifting torque of 800t m is designed, and the wind load on the structure is calculated by taking the tower crane as an example.The jacking bushing is the main force structure in the lifting condition. According to the working characteristics of the lifting condition of the tower crane, this paper analyzes the force situation of the jacking jacket under the condition of no wind jacking, and various factors affecting the force.According to the principle of mechanics, the influence of load change on the force roller is analyzed.The balancing adjustment strategy of horizontal jib tower crane is analyzed, and the function of roller pressure change is listed.According to the mechanical characteristics of the jacking bushing frame, an deployable web rod is designed to deal with the stiffness deficiency of the opening side of the jacking sleeve frame for the introduction of standard joints but not for the web bar in response to the sudden wind load.The finite element model of tower crane lifting system is established.Under the condition that the balance has been adjusted, the stress of the jacking frame and the standard section is solved by applying wind load in a certain direction and a certain wind speed, and the strength failure and the stability failure are checked for different bars.Through repeated trial calculation and analysis, it is determined that under certain wind direction, the most windy load can be withstood when the lifting condition is safe, and the wind direction is constantly changed according to the law, and the finite element results are calculated and analyzed repeatedly.The safe lifting wind speed vector table of 360 擄circumferential wind load is obtained in order to provide guidance for the jacking operator.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH213.3

【參考文獻】

相關期刊論文 前10條

1 黃洪鐘,姚新勝;塔式起重機安全性研究與展望[J];安全與環(huán)境學報;2001年03期

2 尹強;陳世教;冀滿忠;;基于ANSYS的塔式起重機結構模態(tài)分析[J];重慶建筑大學學報;2005年06期

3 趙林,袁士達;液壓側頂升塔機在頂升過程中為何不能轉臂[J];建筑安全;2000年02期

4 門長根;塔機常見事故的分析和預防[J];建筑安全;2002年08期

5 陳雪萍;;塔式起重機頂升系統(tǒng)的受力分析與使用安全[J];建筑安全;2006年09期

6 李守林;我國塔式起重機的現(xiàn)狀與發(fā)展[J];建筑機械化;2000年06期

7 吳恩寧,方國慶,包煥林,唐小衛(wèi);試論塔式起重機的防強臺風措施[J];建筑機械化;2005年01期

8 胡建鋒;;國內內爬塔式起重機的開發(fā)與發(fā)展[J];建筑機械化;2005年11期

9 張傳福;;自升塔式起重機頂升液壓系統(tǒng)的設計與分析[J];建筑機械;1989年07期

10 孔慶璐,王丕興;日本塔式起重機的發(fā)展史[J];建筑機械;2001年05期

本文編號：1686796