Using softened contact relationship describing compressible membrane in FEA of spiral case structure

• Autorzy: Zhang Q. L. , Wu H. G.
• Języki publikacji: EN

Abstrakty

EN

A steel spiral case surrounded with mass concrete in a hydroelectric power plant is what is called a spiral case structure (SCS). The top exterior surface of a steel spiral case is routinely covered with a thin-layer compressible membrane. Unfortunately, the description of membrane in current structural finite element analyses (FEA) of SCS is a tough work in a conventional element-represented way. With the purpose of both accurately and conveniently describing the membrane, we have made a maiden attempt at modeling it by defining a softened contact relationship between the spiral case liner and the surrounding concrete where the membrane works. The novel simulation concept concentrates on governing the penetration behavior of the spiral case liner into the surrounding concrete, by prescribing an appropriate and straightforward dependence of the contact pressure on the penetration (overclosure). Profiting from that the inconvenient and error-prone FE modeling of a thin-layer membrane can be avoided. The simulation technique's reliability in describing the mechanical property of a membrane material was verified. Its applicability and competence have been demonstrated to be valid and satisfactory. Accepting the simulation concept will help to significantly improve the FE modeling efficiency of a SCS and considerably simplify the material description of a membrane. The possibility of contributing to change the way we describe the membrane in structural FEA of SCS is a very exciting proposition.

Słowa kluczowe

EN

spiral case structure; compressible membrane; softened contact relationship; finite element analysis; hydroelectric power plant

PL

membrana; analiza elementów skończonych; elektrownia wodna

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2013
• Tom: Vol. 13, no. 4
• Strony: 506--517
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr.

Twórcy

autor

Zhang Q. L.

• Changjiang River Scientific Research Institute, 430010 Wuhan, Hubei, China

autor

Wu H. G.

• State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 430072 Wuhan, Hubei, China

Bibliografia

• [1] A.Y. Aronson, V.A. Bazhenov, E.A. Gotsulyak, V.I. Gulyaev, A.I. Ogloblya, Nonlinear deformation of shells of the volute chambers of hydraulic turbines in an elastic medium, Strength of Materials 17 (4) (1985) 555-560.
• [2] E.C. Kalkani, Expected displacements and stresses in the encasing concrete of a Francis turbine scroll case, Computers and Structures 55 (4) (1995) 735-739.
• [3] J.H. Cui, H.D. Su, 3-D FEM emulation computation on surrounding concrete of steel spiral case keeping internal pressure during construction, in: Proceedings of International Symposium on Computational Mechanics, 2007.
• [4] H.G. Wu, Y. Shen, K.C. Jiang, Structural research on embedment of a bare de flated spiral case, Wuhan University Journal of Natural Sciences 12 (2) (2007) 311-316.
• [5] Z.Q. Tian, Y.L. Zhang, Z.Y. Ma, J. Chen, Effect of concrete cracks on dynamic characteristics of powerhouse for giant-scale hydrostation, Transactions of Tianjin University 14 (4) (2008) 307-312.
• [6] H.G. Wu, Y. Shen, K.C. Jiang, J. Shi, Structural analysis of the embedded spiral case in the Three Gorges hydropower station, Practice Periodical on Structural Design and Construction 17 (2) (2012) 41-47.
• [7] Q.L. Zhang, H.G. Wu, Modal analysis of hydropower house by using finite element method, in: Proceedings of 2009 Asia-Pacific Power and Energy Engineering Conference, 2009.
• [8] Q.L. Zhang, H.G. Wu, H.Q. Yang, Effect of modeling range on structural analysis for powerhouse of hydroelectric power plant by FEM, Transactions of Tianjin University 15 (5) (2009) 388-392.
• [9] C.H. Zhang, Y.L. Zhang, Nonlinear dynamic analysis of the Three Gorge Project powerhouse excited by pressure fluctuation, Journal of Zhejiang University Science A 10 (9) (2009) 1231-1240.
• [10] S.H. Wei, L.J. Zhang, Vibration analysis of hydropower house based on fluid structure coupling numerical method, Water Science and Engineering 3 (1) (2010) 75-84.
• [11] Z.Y. Ma, C.H. Zhang, Static and dynamic damage analysis of mass concrete in hydropower house of Three Gorges Project, Transactions of Tianjin University 16 (6) (2010) 433-440.
• [12] U.S. Army Corps of Engineers, EM 1110-2-3001 Planning and Design of Hydroelectric Power Plant Structures, Department of the Army, Washington, DC, 1995.
• [13] Q.L. Zhang, H.G. Wu, Effect of compressible membrane's nonlinear stress strain behavior on spiral case structure, Structural Engineering and Mechanics 42 (1) (2012) 73-93.
• [14] M.C. Hawkins, B. O'Toole, D. Jackovich, Cell morphology and mechanical properties of rigid polyurethane foam, Journal of Cellular Plastics 41 (3) (2005) 267-285.
• [15] V. Rizov, Indentation of foam-based polymer composite sandwich beams and panels under static loading, Journal of Materials Engineering and Performance 18 (4) (2009) 351-360.
• [16] F. Fischer, G.T. Lim, U.A. Handge, V. Altstdt, Numerical simulation of mechanical properties of cellular materials using computed tomography analysis, Journal of Cellular Plastics 45 (5) (2009) 441-460.
• [17] V. Salomoni, G. Mazzucco, C. Pellegrino, C. Majorana, Three-dimensional modelling of bond behaviour between concrete and FRP reinforcement, Engineering Computations 28 (1) (2011) 5-29.
• [18] G. Mazzucco, V.A. Salomoni, C.E. Majorana, Three-dimensional contact-damage coupled modeling of FRP reinforcements simulation of delamination and long-term processes, Computers and Structures 110-11 (2012) 15-31.
• [19] J. Lubliner, J. Oliver, S. Oller, E. Oñate, A plastic-damage model for concrete, International Journal of Solids and Structures 25 (3) (1989) 299-326.
• [20] J. Lee, G.L. Fenves, Plastic-damage model for cyclic loading of concrete structures, Journal of Engineering Mechanics 124 (8) (1998) 892-900.