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Analysis of Crack and Optimum Design for Scroll Case in Hydropower Station

Author: ZhangXueLi
Tutor: MaZhenYue
School: Dalian University of Technology
Course: Water Resources and Hydropower Engineering
Keywords: Volute Optimal design Crack Induced joints
CLC: TV313
Type: Master's thesis
Year: 2006
Downloads: 136
Quote: 6
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Abstract


Volute structure is an important part of the power house structure , because of its complex structure , each project has a very different force characteristics between , there are still many problems need to be studied . Especially with the power station working head unit capacity increases sharply , the structure size more large force conditions become more complex , more prominent structural safety and design optimization . This article west Longchi hydropower engineering examples , the following research : ( 1 ) volute structure optimization of reinforcement . The establishment of a three-dimensional finite element model using ANSYS software , analysis of the of different reinforced arrangement , reinforcement ratios volute structure stress and crack width and crack distribution , in order to determine the optimal ratio of reinforcement and reinforced arrangement . (2) stress simulation applications preloading filling spiral case , power plant volute structure for Xilongchi preloading filling different value conditions with its three-dimensional finite element analysis , steel volute the relationship between the stress distribution law of the peripheral reinforced concrete with a water-filled preload value , as well as different preloading head impact of the volute structural crack width and crack development range , in order to determine the reasonable water-filled preload value . (3) induced joint volute structure . The volute structure induced joints , the main purpose is to control the launching of the crack , but will also influence the structural stiffness and force characteristics of the volute . Mainly from the the induced joints arranged location and induced sew two angles of equivalent strength to start analysis of induced joints volute structure stress , displacement and crack width, crack carry out the scope of the impact , the optimal solution looking for cracks . Modeling and calculation process is as true as possible to simulate the actual project structure , some useful conclusions obtained by numerical simulation , theoretical research and practical application value .

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CLC: > Industrial Technology > Hydraulic Engineering > Hydraulic structures > Structural theory and computational > Structural fracture mechanics
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