本文選題：全地面起重機(jī) + 組合臂架��； 參考：《哈爾濱工業(yè)大學(xué)》2012年碩士論文

【摘要】：伴隨著風(fēng)電、核電等大型項(xiàng)目的深入發(fā)展及對(duì)整體吊裝作業(yè)的要求，全地面起重機(jī)的臂架系統(tǒng)朝著大型化、復(fù)雜化方向發(fā)展，以滿足工程大重量、大作業(yè)幅度工作的需求。具有超起裝置的起重臂具有良好的起升性能，但由于結(jié)構(gòu)復(fù)雜，，其穩(wěn)定性分析計(jì)算已成為國(guó)內(nèi)大型伸縮臂發(fā)展的技術(shù)難點(diǎn)，而具有超起裝置的伸縮式組合臂架的穩(wěn)定性分析更是國(guó)內(nèi)大型組合吊臂發(fā)展的瓶頸，極大的制約了國(guó)內(nèi)對(duì)大型臂架系統(tǒng)設(shè)計(jì)的優(yōu)化水平。目前為止，國(guó)內(nèi)尚無可直接應(yīng)用于指導(dǎo)工程設(shè)計(jì)的相關(guān)研究成果。本文將致力于對(duì)具有超起裝置起重臂及伸縮式組合臂架的整體穩(wěn)定性研究做初步的探索，以期拋磚引玉，為我國(guó)工程機(jī)械的發(fā)展做出些許有益貢獻(xiàn)。 提出了具有對(duì)稱雙拉桿作用的起重臂平面外穩(wěn)定性計(jì)算方法及計(jì)算公式，通過分析臨界失穩(wěn)條件下對(duì)稱雙拉桿引起的空間非保向力作用，建立吊臂的撓曲微分方程，引入適當(dāng)?shù)倪吔鐥l件和參數(shù)處理方法，獲取起重臂平面外失穩(wěn)特征方程，并進(jìn)一步分析了對(duì)稱拉桿張角對(duì)起重臂平面外穩(wěn)定性的影響。結(jié)果表明，吊臂在對(duì)稱雙拉桿作用下的平面外穩(wěn)定性高于單拉桿作用，增大兩拉桿夾角可以顯著提高吊臂的平面外抗失穩(wěn)能力。 提出了具有空間雙拉繩超起裝置起重臂的整體穩(wěn)定性計(jì)算方法及計(jì)算公式，通過建立適當(dāng)?shù)牧W(xué)分析模型，闡述了具有超起裝置起重臂的平面外穩(wěn)定性計(jì)算方法，并在考慮空間雙非保向力及超起撐桿側(cè)向剛度共同作用下建立吊臂臨界條件下的平面外撓曲微分方程，采用適當(dāng)?shù)膮?shù)處理方法得到吊臂的平面外失穩(wěn)特征方程，并進(jìn)一步探討超起裝置結(jié)構(gòu)參數(shù)對(duì)吊臂系統(tǒng)穩(wěn)定性的影響，為工程中結(jié)構(gòu)設(shè)計(jì)分析提供參考。 研究伸縮式組合臂架的平面外整體穩(wěn)定性問題，通過分別建立主臂和副臂在臨界狀態(tài)下彎曲和扭轉(zhuǎn)變形微分方程，根據(jù)主臂和副臂的變形協(xié)調(diào)條件，得出組合臂架在主臂根部固定副臂端部自由狀態(tài)下的平面外失穩(wěn)特征方程。
[Abstract]:With the further development of wind power, nuclear power and other large-scale projects and the requirements of the whole lifting operation, the boom system of the whole ground crane is developing towards the direction of large scale and complexity, in order to meet the needs of the large weight and large work of the project.The hoisting arm with overloading device has good lifting performance, but because of its complex structure, its stability analysis and calculation has become a technical difficulty in the development of large telescopic arm in China.The stability analysis of the telescopic combined boom with overloading device is the bottleneck of the development of the large combined boom in China, which greatly restricts the optimization level of the design of the large boom system in China.Up to now, there are no related research results that can be directly applied to guide engineering design in China.This paper is devoted to the preliminary study of the overall stability of the lifting arm and the telescopic combined boom with a super lifting device in order to make some useful contributions to the development of construction machinery in China.In this paper, the calculation method and formula of the out-of-plane stability of the cantilever with symmetrical double pull bar are presented. By analyzing the spatial non-conformal force caused by the symmetric double pull bar under the critical instability condition, the differential equation of deflection of the boom is established.An appropriate boundary condition and parameter processing method are introduced to obtain the characteristic equation of the out-of-plane instability of the lifting arm, and the influence of the tension angle of the symmetrical pull bar on the out-of-plane stability of the boom is further analyzed.The results show that the out-of-plane stability of the boom is higher than that of the single pull bar under the action of symmetrical double strut, and the out-of-plane stability of the boom can be improved significantly by increasing the angle between the two rods.This paper puts forward the calculation method and formula of the whole stability of the lifting arm with space double rope overhoisting device. By establishing the appropriate mechanical analysis model, the calculation method of the out-of-plane stability of the lifting arm with the overlift device is expounded.Under the combined action of spatial double non-conformal force and lateral stiffness of the cantilever, the differential equation of out-of-plane deflection under the critical condition of the boom is established, and the characteristic equation of the out-of-plane instability of the boom is obtained by using the appropriate parameter processing method.Furthermore, the influence of structural parameters on the stability of boom system is discussed, which provides a reference for structural design and analysis in engineering.In this paper, the out-of-plane global stability of the telescopic combined boom is studied. By establishing the differential equations of bending and torsional deformation of the main arm and the accessory arm in the critical state respectively, according to the deformation coordination conditions of the main arm and the accessory arm,The characteristic equation of out-of-plane instability of the combined arm is obtained under the free state of the end of the forearm fixed at the root of the main arm.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH213

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