核电站环行起重机吊钩组冲顶仿真研究
发布时间：2018-08-05 13:07
【摘要】：核电站环行起重机沿着位于反应堆厂房上部的环形轨道行驶,它是核电站中的重要起重设备之一。在安装、维修反应堆厂房内的重型设备和反应堆换料过程中,它主要是提供吊运服务。 本文以大连重工·起重集团有限公司生产的AP1000核电站环行起重机作为研究对象,该设备有一项特殊要求,需要吊钩组空载冲顶试验,且设备无损伤,这是其它核电站环行起重机所没有的,也是国内起重机行业所不允许的,并且国内厂家从未做过该项试验。由于核电设备的特殊性,因此对核电站环行起重机的安全性要求极高。提高核电站环行起重机吊钩组防碰撞安全性对保证核电设备的正常安装十分重要。 为分析吊钩组冲顶过程中的力学特性,本文基于ADAMS和LS-DYNA软件,建立了核电站环行起重机主起升机构的虚拟样机模型和显式动力有限元模型。研究多倍率滑轮组钢丝绳的建模和简化方法,利用ADAMS软件进行吊钩组冲顶动力学仿真,得到了吊钩组冲顶载荷及拉紧钢丝绳对主起升承载梁的压力载荷。将所得载荷添加到LS-DYNA软件建立的有限元模型中,进行显式动力学求解,观察主起升承载梁受碰撞挤压后的应力、变形情况。结果表明：在接触碰撞瞬间,机构各处受力不稳定,引起的振动比较大；在吊重的影响下,吊钩组对主起升承载梁的冲顶作用有所减弱；在拉紧钢丝绳作用下主起升承载梁所受的压力很大且发生大变形,需安装防护设备。仿真结果为核电站环行起重机的安全性设计提供了重要的理论依据。
[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.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：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.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH21
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