【摘要】：鋼閘門的應(yīng)力分析研究一直是水利工作者重點(diǎn)關(guān)注的課題。由于現(xiàn)實(shí)實(shí)驗(yàn)研究受到了加載問(wèn)題、結(jié)果監(jiān)測(cè)問(wèn)題的限制,對(duì)于鋼閘門應(yīng)力分析問(wèn)題的研究多依賴于數(shù)值方法。東武仕水庫(kù)以防洪、供水為主,同時(shí)還具有水利發(fā)電等多功能的大型水利樞紐,由于水庫(kù)建成已久,水庫(kù)泄洪洞等結(jié)構(gòu)都存在一定隱患,威脅著工程自身的安全。為了保證水庫(kù)下游重要城市及基礎(chǔ)設(shè)施安全,需對(duì)水庫(kù)泄洪洞除險(xiǎn)加固。東武仕水庫(kù)泄洪洞為有壓短管接拱式無(wú)壓涵洞型式,分3孔,且兩端都是懸臂。經(jīng)分析,該泄洪洞除險(xiǎn)加固項(xiàng)目施工方案需采取運(yùn)用兩個(gè)閘門中墩實(shí)行雙懸臂組合式鋼疊梁來(lái)封堵閘門,在檢修門上游進(jìn)行水下臨時(shí)封堵的方案。雙懸臂閘門水下封堵方式在實(shí)際工程中應(yīng)用極少,存在很多的實(shí)質(zhì)問(wèn)題需要研究。針對(duì)東武仕水庫(kù)雙懸臂鋼疊梁閘門的運(yùn)行方式和受力特點(diǎn),采用有限元數(shù)值模擬的方法對(duì)鋼閘門進(jìn)行靜力學(xué)和動(dòng)力學(xué)模態(tài)分析,在靜力學(xué)分析的基礎(chǔ)上計(jì)算出主梁、面板的最大彎曲應(yīng)力以及腹板的最大剪應(yīng)力,并對(duì)鋼閘門進(jìn)行動(dòng)力學(xué)模態(tài)分析,分析不同工況下的自振頻率和自振頻率所對(duì)應(yīng)的振型,分析結(jié)果表明,靜力學(xué)和動(dòng)力學(xué)兩種方法來(lái)分析閘門的安全性,都能夠較好的驗(yàn)證閘門的最危險(xiǎn)部位。因此,本文中針對(duì)泄洪洞深水封堵閘門,建立雙懸臂鋼疊梁閘門有限元分析模型,應(yīng)用ANSYS軟件就閘門的剛度、振動(dòng)情況就此展開(kāi)對(duì)閘門的靜力學(xué)和動(dòng)力學(xué)方面的研究。本文基于有限元法,對(duì)東武仕水庫(kù)鋼閘門應(yīng)力進(jìn)行分析,從宏觀的角度探究在荷載的作用下鋼閘門的應(yīng)力形態(tài),從而為現(xiàn)實(shí)類似工程提供一定的參考。
[Abstract]:The stress analysis of steel gate has always been the focus of attention of water conservancy workers. Due to the limitation of the result monitoring problem due to the loading problem, the research on the stress analysis of steel gate depends on the numerical method. Dongwushi reservoir is a large water conservancy project with many functions, such as flood control, water supply and so on. Because the reservoir has been built for a long time, there are some hidden dangers in the structure of reservoir flood discharge tunnel and so on, which threaten the safety of the project itself. In order to ensure the safety of the important cities and infrastructure downstream of the reservoir, it is necessary to reinforce the flood discharge tunnel of the reservoir. Dongwushi reservoir flood discharge tunnel is an arch-free culvert with short pressure pipe. It is divided into 3 holes and has cantilever at both ends. According to the analysis, the construction scheme of the flood discharge tunnel danger removal and reinforcement project should adopt the scheme of double cantilever composite steel laminated beam with two middle piers of the gate to seal the gate, and carry out the temporary underwater plugging upstream of the repair gate. Double cantilever gate underwater plugging is rarely used in practical engineering, and there are many essential problems to be studied. In view of the operation mode and stress characteristics of double-cantilever steel laminated gate in Dongwushi Reservoir, the static and dynamic modal analysis of steel gate is carried out by using finite element numerical simulation method, and the main beam is calculated on the basis of static analysis. The maximum bending stress of the face plate and the maximum shear stress of the web plate are analyzed. The dynamic modal analysis of the steel gate is carried out, and the corresponding modes of the natural vibration frequency and the natural vibration frequency under different working conditions are analyzed. The results show that, Static and dynamic methods to analyze the safety of the gate, can better verify the most dangerous part of the gate. In this paper, the finite element analysis model of double cantilever steel laminated beam gate is established, and the stiffness and vibration of the gate are studied by using ANSYS software. Based on the finite element method, the stress of the steel gate of Dongwushi Reservoir is analyzed in this paper, and the stress form of the steel gate under the action of load is explored from the macroscopic angle, thus providing a certain reference for the similar engineering in reality.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TV663

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