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  本文選題：塔式起重機(jī) + 動態(tài)特性�。� 參考：《哈爾濱工業(yè)大學(xué)》2012年碩士論文

【摘要】：隨著現(xiàn)代建筑、工業(yè)行業(yè)的快速發(fā)展，塔式起重機(jī)在高層建筑項(xiàng)目中的應(yīng)用也更加廣泛�，F(xiàn)代建筑施工要求提高的同時對塔機(jī)的使用性能也提出了更高的要求。由于塔機(jī)常處于不同的工作狀態(tài)，運(yùn)動耦合會使結(jié)構(gòu)受到?jīng)_擊振動，隨著塔機(jī)結(jié)構(gòu)尺寸，工作速度的提高這種沖擊振動帶來的影響就更加突出。然而目前國內(nèi)外的起重機(jī)設(shè)計規(guī)范中都沒有對塔機(jī)的動態(tài)特性問題提出明確的規(guī)定。 由于塔式起重機(jī)結(jié)構(gòu)復(fù)雜，自由度較多，對其進(jìn)行動態(tài)分析過程繁瑣計算量大。本文針對這一問題，通過建立塔機(jī)的等效模型，提出一種利用模態(tài)綜合理論對塔機(jī)的動態(tài)特性進(jìn)行快速分析的方法，為塔機(jī)的動態(tài)特性分析提供參考。 為詳盡了解塔機(jī)的動態(tài)特性，本文闡述了復(fù)雜結(jié)構(gòu)的塔機(jī)建模過程中相關(guān)構(gòu)件的處理原則以及利用有限元軟件分析的建模過程，建立了工程應(yīng)用的塔機(jī)完整有限元模型并進(jìn)行了動態(tài)分析，為后續(xù)的計算分析提供依據(jù)。 對所建立的格構(gòu)式塔機(jī)模型進(jìn)行了子結(jié)構(gòu)的劃分，并利用固定界面模態(tài)綜合法對所得的各子結(jié)構(gòu)進(jìn)行分析以及整體結(jié)構(gòu)的綜合求解，與有限元完整模型結(jié)果對比分析可知，動態(tài)子結(jié)構(gòu)方法在實(shí)際應(yīng)用中能夠快速簡便的對系統(tǒng)進(jìn)行求解并保持較高的計算精度與效率。 以完整有限元模型的結(jié)果作為參照構(gòu)建了塔機(jī)的等效模型，等效后的模型具有結(jié)構(gòu)簡單，自由度少的優(yōu)點(diǎn)。將等效模型進(jìn)行相應(yīng)的子結(jié)構(gòu)劃分并利用固定界面模態(tài)綜合法對各子結(jié)構(gòu)進(jìn)行分析計算，得到了每個子結(jié)構(gòu)的特性矩陣，利用每個子結(jié)構(gòu)的特性矩陣可快速進(jìn)行系統(tǒng)的組裝，，得到系統(tǒng)的動態(tài)特性，達(dá)到便捷地進(jìn)行塔機(jī)動態(tài)分析的目的。
[Abstract]:With the rapid development of modern architecture and industrial industry, tower cranes are widely used in high-rise building projects. At the same time, higher requirements for the use of tower cranes are put forward while the construction requirements of modern buildings are improved. Because the tower crane is often in different working state, the motion coupling will cause the structure to be subjected to shock vibration, with the tower crane structure size, the impact of the impact vibration caused by the increase of working speed is more prominent. However, there is no explicit regulation on the dynamic characteristics of tower crane in the crane design code at home and abroad. Because the structure of tower crane is complex and the degree of freedom is more, the dynamic analysis process of tower crane is very complicated. In order to solve this problem, by establishing the equivalent model of tower crane, this paper puts forward a method to analyze the dynamic characteristics of tower crane by means of modal synthesis theory, which provides a reference for the dynamic characteristic analysis of tower crane. In order to understand the dynamic characteristics of tower crane in detail, this paper describes the principles of dealing with relevant components in the modeling process of tower crane with complex structure and the modeling process using finite element software. The complete finite element model of tower crane used in engineering is established and dynamic analysis is carried out, which provides the basis for subsequent calculation and analysis. The substructure of the lattice tower crane model is divided, and the substructure is analyzed by the fixed interface modal synthesis method and the whole structure is solved synthetically. The results are compared with the results of the complete finite element model. Dynamic substructure method can be used to solve the system quickly and easily, and maintain high accuracy and efficiency. The equivalent model of tower crane is constructed with the result of complete finite element model as reference. The equivalent model has the advantages of simple structure and less degree of freedom. The equivalent model is divided into corresponding substructures and the fixed interface modal synthesis method is used to analyze and calculate each substructure. The characteristic matrix of each substructure is obtained, and the system can be assembled quickly by using the characteristic matrix of each substructure. The dynamic characteristics of the system are obtained, and the purpose of dynamic analysis of tower crane is achieved conveniently.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH213.3

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