The Study Of FEM For Internal Force Analysis Of The Large Pumping Station

There are main three methods in the stress analysis and the stability analysis of the pumping station at present time, which are mechanics of structures method mechanics of materials method and finite element method.. It is a common way that the special structure is predigested into plane problems, but the results are cursory. For the mammoth pumping station, its geometric form and load distribution are very complex due to the collection of the mechanical and electrical equipments and the influence of the flow passage, so it is necessary to carry out spatial analysis for the mammoth pumping station.This paper is written in the engineering background what is Taierzhuang pumping station, which is the 7th pumping station of the east route of South-to-North Water Transfer Project in China. Three-dimensional finite element of the pumping station is set up, in which the special element model is adopted to simulate the structural characteristics. In the 'Design code for hydraulic concrete structure', toward the structural component of reinforced concrete, the calculation in the status of bearing capability of the is based on the internal forces in section. According to that, the amount of the reinforcing steel bar in the section could be acquired and the rationality of design could be concluded as well, so the internal force is more valuable than the stress, but by 3-D FEM only the magnitude of stress of each node can be obtained directly. Aiming at the practicality, in this paper, the study of FEM for internal force analysis of the large pumping is done, the problem how to get the internal force expediently and to show the internal force is settled down, which provides much warranty for the station's reinforce design, so as to other large pumping stations of South-to-North Water Transfer Project in China.After intercomparing several methods, the method of finite element internal force is a nice one. While using the method, the key is to get the information of the element which includes the nodes of the specified section. For the intricate structure, it is great difficulty in preparing the information of these sections manually. In this paper, based on the analysis of finite element mesh and its spatial geometricalcharacteristics, by dealing with the relations between the components of the element and the referenced section, the information what is needed can be selected out, it has been proved that the method that the information of the sections is generated by computer is feasible.