核電站環(huán)行起重機吊鉤組沖頂仿真研究
發(fā)布時間：2018-08-05 13:07
【摘要】：核電站環(huán)行起重機沿著位于反應堆廠房上部的環(huán)形軌道行駛,它是核電站中的重要起重設備之一。在安裝、維修反應堆廠房內的重型設備和反應堆換料過程中,它主要是提供吊運服務。 本文以大連重工·起重集團有限公司生產(chǎn)的AP1000核電站環(huán)行起重機作為研究對象,該設備有一項特殊要求,需要吊鉤組空載沖頂試驗,且設備無損傷,這是其它核電站環(huán)行起重機所沒有的,也是國內起重機行業(yè)所不允許的,并且國內廠家從未做過該項試驗。由于核電設備的特殊性,因此對核電站環(huán)行起重機的安全性要求極高。提高核電站環(huán)行起重機吊鉤組防碰撞安全性對保證核電設備的正常安裝十分重要。 為分析吊鉤組沖頂過程中的力學特性,本文基于ADAMS和LS-DYNA軟件,建立了核電站環(huán)行起重機主起升機構的虛擬樣機模型和顯式動力有限元模型。研究多倍率滑輪組鋼絲繩的建模和簡化方法,利用ADAMS軟件進行吊鉤組沖頂動力學仿真,得到了吊鉤組沖頂載荷及拉緊鋼絲繩對主起升承載梁的壓力載荷。將所得載荷添加到LS-DYNA軟件建立的有限元模型中,進行顯式動力學求解,觀察主起升承載梁受碰撞擠壓后的應力、變形情況。結果表明：在接觸碰撞瞬間,機構各處受力不穩(wěn)定,引起的振動比較大；在吊重的影響下,吊鉤組對主起升承載梁的沖頂作用有所減弱；在拉緊鋼絲繩作用下主起升承載梁所受的壓力很大且發(fā)生大變形,需安裝防護設備。仿真結果為核電站環(huán)行起重機的安全性設計提供了重要的理論依據(jù)。
[Abstract]:The annular crane of nuclear power plant is one of the important lifting equipment in the nuclear power plant, which runs along the annular track located in the upper part of the reactor building. In the installation and maintenance of heavy equipment in the reactor plant and reactor refueling process, it mainly provides hoisting services. In this paper, the ring crane of AP1000 nuclear power station produced by Dalian heavy Industry lifting Group Co., Ltd. is taken as the research object. The equipment has a special requirement, it needs the hooks to test the roof without load, and the equipment has no damage. This is not available in other nuclear power plant circular cranes, and is not allowed by the domestic crane industry, and the domestic manufacturers have never done the test. Because of the particularity of nuclear power equipment, the safety requirements of nuclear power plant circular crane are very high. It is very important to improve the anti-collision safety of hooks of ring cranes in nuclear power plant to ensure the normal installation of nuclear power equipment. In order to analyze the mechanical characteristics of hooks during heading, the virtual prototype model and explicit dynamic finite element model of hoisting mechanism of ring crane in nuclear power plant are established based on ADAMS and LS-DYNA software. The modeling and simplification method of multi-rate pulley group steel wire rope is studied. By using ADAMS software, the punch load of hook group and the pressure load of tension wire rope on the main lifting bearing beam are obtained. The obtained load is added to the finite element model established by LS-DYNA software and the explicit dynamic solution is carried out to observe the stress and deformation of the main lifting bearing beam after the impact extrusion. The results show that: at the moment of contact impact, the force around the mechanism is unstable, and the vibration is relatively large, and the effect of hook group on the main lifting and bearing beam is weakened under the influence of hoisting weight. Under the action of tightening wire rope, the main lifting bearing beam is subjected to great pressure and deformation, so it is necessary to install protective equipment. The simulation results provide an important theoretical basis for the safety design of nuclear power plant circular crane.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH21
[Abstract]:The annular crane of nuclear power plant is one of the important lifting equipment in the nuclear power plant, which runs along the annular track located in the upper part of the reactor building. In the installation and maintenance of heavy equipment in the reactor plant and reactor refueling process, it mainly provides hoisting services. In this paper, the ring crane of AP1000 nuclear power station produced by Dalian heavy Industry lifting Group Co., Ltd. is taken as the research object. The equipment has a special requirement, it needs the hooks to test the roof without load, and the equipment has no damage. This is not available in other nuclear power plant circular cranes, and is not allowed by the domestic crane industry, and the domestic manufacturers have never done the test. Because of the particularity of nuclear power equipment, the safety requirements of nuclear power plant circular crane are very high. It is very important to improve the anti-collision safety of hooks of ring cranes in nuclear power plant to ensure the normal installation of nuclear power equipment. In order to analyze the mechanical characteristics of hooks during heading, the virtual prototype model and explicit dynamic finite element model of hoisting mechanism of ring crane in nuclear power plant are established based on ADAMS and LS-DYNA software. The modeling and simplification method of multi-rate pulley group steel wire rope is studied. By using ADAMS software, the punch load of hook group and the pressure load of tension wire rope on the main lifting bearing beam are obtained. The obtained load is added to the finite element model established by LS-DYNA software and the explicit dynamic solution is carried out to observe the stress and deformation of the main lifting bearing beam after the impact extrusion. The results show that: at the moment of contact impact, the force around the mechanism is unstable, and the vibration is relatively large, and the effect of hook group on the main lifting and bearing beam is weakened under the influence of hoisting weight. Under the action of tightening wire rope, the main lifting bearing beam is subjected to great pressure and deformation, so it is necessary to install protective equipment. The simulation results provide an important theoretical basis for the safety design of nuclear power plant circular crane.
【學位授予單位】：大連理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH21
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