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Structure Analysis of Pump House with Baffled-wall Wet-pit

Author: TaoJiaJun
Tutor: YeXianGuo
School: Hefei University of Technology
Course: Structural Engineering
Keywords: pump house with wet-pit Analysis methods Space structure Finite Element 3D-model stress strain
CLC: TV675
Type: Master's thesis
Year: 2009
Downloads: 48
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Abstract

At present, the methods of analysing the structure of plant stress and stability pumping station are: structural mechanics,material mechanics and finite element method.In order to simplify the structure calculation of stress and stability in the analysis of pumping plant,space structure is usually divided into a number of plane structure.when the complex structure involved,it is difficult to simplify the process.In this case,designers often adopt a number of similar analysis,and then ensure the safety of the project relying on the experience of the designers,building the analogy works ,model test,increasing the safety factor and other methods.For a complex multi-storey spatial structure,a reasonable approach is to use three-dimensional finite element method when it is difficult to calculate the internal forces with conventional analysis method in structural mechanics.With the development of electronic digital computer,the handling ability of structural analysis steps into a new stage of development in the size and depth.The main pumping station structure includes the pumping station floor,inlet and exit pipeline, dividing pier, bent, the crane beam, and so on.The space structure of Pier wall,dividing pier, bent and the crane beam can be simplified into plane framework and beam structure and calculated according to the method of structural mechanics.For pump room part (including the pumping station floor and dividing pier),the main methods of the stress calculation are method of beam inversion method,method of cross section,method of elastic groundwook beam and so on,treated as the board, beam or frame structure of the flexible foundation according to the stress conditions and structure forms of support.Finite element method is a product combined with mechanics, mathematics and modern technology.It is a strong numerical method that can resolve differential equations and initial value problem.In this paper,the finite element method was studied in depth to calculate the spatial structure.Finite element method disperses the foundation of any space by equal parameter unit for space coordinating,calculate the stress of any point by space compounding finite element method,and then according to the Engineering demand,equals the space stress to the stress of plane structure that conform to the Engineering custom.The use of space combination of the finite element method to derive the structure of any point of stress,and then,according to the engineering requirements,space Stress will be for the equivalent in line with the engineering design of the plane internal force of habit.In this paper, the calculation object was the floor and dividing pier of Beigeng pumping stations in the Fanchang county,and three-dimensional finite element analysis has been dealed using ANSYS software.Treating the pump room and the foundation as a whole unit,the model of spatial structure was established,and thus static calculation was analysed. Since the calculation model effectively has taken into account the inlet-pool frusta, the floor, interaction among the bases,the results were closer to the objective reality than the results obtained with conventional methods.According to comparison among the methods of space structure calculation,the similarities and differences were analysed and the necessity of spatial analysis was emphasized by the comparision between plane model and space model.

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CLC: > Industrial Technology > Hydraulic Engineering > Water control,hydraulic structures > Water, water diversion project > Pumping station
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