Optimal Design On The Spreader Of Structural Module In AP1000 Nuclear Power Plant

AP1000 is the representative third generation nuclear power plant introduced from the US company Westinghouse. The modular design and manufacture technology is one of five key technologies of AP1000 nuclear power plant, it realizes the parallel manufacturing between modules,greatly reducing the construction time and saving the cost. Deformation control is put forward higher requirements in the modular design and manufacture technology, otherwise modules will not be able to group. At the same time, the lifting of module plays an important role in deformation control. Along with our country to carry out the work of AP1000 nuclear power plant, how to design efficient hanger has attracted more and more attention. Based on the lifting of CA01 and CA20 modules during the construction of AP1000 nuclear power plant, the dead weight of special spreader is reduced by optimal design in this paper. The main contents of this paper are as follows:(1) The characteristics of CA01 and CA20 module is introduced, and the method is given to calculate the center of module, the load of eight lifting lug is determined, then according to the design requirements, a design scheme is given which can realize the search for lifting point;(2)The evolutionary structure optimization (ESO) and the ANSYS optimization module are introduced, and the evolutionary structure optimization (ESO) implementation steps in the ANSYS software are given;(3) Optimization design is carried out on the balance beam of spreader. Through force analysis, the most dangerous condition is given. Using the Evolution Structure Optimization (ESO) method, the optimum section shape of balance beam is got. Then based on this section shape, the optimal structure of balance beam can be got using the size optimization method;(4) Optimization design is worked out on the hanger of spreader. The ESO method is applied in hanger topology optimization to obtain an optimal topology structure. And the optimal parameters of hanger can be got by the size optimization.