Design Research Of Large Tonnage Crane Used In Nuclear Power Engineering

As a new energy, nuclear power has the advantages of environmental protection, low energy consumption, high efficiency and so on. With the development of nuclear power technology, the controllability of nuclear energy improves substantially. Although affected by the nuclear accident in Fukushima in2011, nuclear power has been used widely all over the world. In order to ensure the safety of nuclear power, at present, modular construction method is adopted in the construction of the third generation nuclear power technology and above. Compared to the previous construction method, new construction method results in increasing in the size and weight of precast module. And this puts forward higher requirements for nuclear power hoisting equipment. At present, several large tonnage cranes have been used in nuclear power construction internationally. And several domestic companies have also researched and developed more than3000DWT crawler crane. However, the domestic large tonnage crane has not been applied in nuclear power construction and the large tonnage crane used in domestic nuclear power construction is still have a lot of space in research and development.Nuclear power construction has the characteristics of long construction period, less heavy components, heavy weight, large size, two reactors construction at the same time, and so on. Compared to the large tonnage crawler crane which slews difficultly, a large tonnage ring-rail crane located in the middle of the two reactors is presented in this paper. It can ensure the simultaneous construction of two reactors in a work period. Thus, the large tonnage ring-rail crane can satisfy the operating requirements of nuclear power construction. In this case, based on the subject of National863Program "kiloton large crane", this paper studies the large-tonnage cranes for nuclear power construction and researches on the design ideas and methods of the large-tonnage cranes.First of all, according to the operation environment and load condition of nuclear power engineering, this paper proposes the suitable forms of chassis and boom, and develops chassis multi-wheel hydraulic load sharing mode. Secondly, the structure of plate, slewing drive, and the forms of frame and counterweight are designed. Besides, finite element model of main structural components are established and structure strength is checked by finite element analysis. At last, based on the crane3D model created in this paper, an optimization model is designed. Then, through selecting the appropriate variables, the relationship between the parameters of main crane modules and variables is deduced. Thus, the final optimization objective function is established. Then, the function in Matlab optimization toolbox is used to solve multivariate constrained nonlinear minimization problem by applying constraints. After that, the design value (optimization variables) in minimum cost are obtained. Then, the parameters of main crane module in the optimum solution are calculated and through sensitivity analysis of the cost function on each variable, the influenee degree of eaeh variable on the total cost are provided, which provides valuable reference for parameter adjustment in the process of subsequent design research.The research content and the design method in this paper have certain guiding significance to design and analysis of large tonnage crane in nuclear power construction.