Abstract
A highly efficient new method for the sizing optimization of large structural systems is introduced in this paper. The proposed technique uses new rigorous optimality criteria derived on the basis of the general methodology of the analytical school of structural optimization. The results represent a breakthrough in structural optimization in so far as the capability of OC and dual methods is increased by several orders of magnitude. This is because the Lagrange multipliers associated with the stress constraints are evaluated explicitly at the element level, and therefore, the size of the dual-type problem is determined only by the number of active displacement constraints which is usually small. The new optimaliy criteria method, termed DCOC, will be discussed in two parts. Part I gives the derivation of the relevant optimality criteria, the validity and efficiency of which are verified by simple test examples. A detailed description of the computational algorithm for structures subject to multiple displacement and stress constraints as well as several loading conditions is presented in Part II.
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References
Berke, L. 1970: An efficient approach to the minimum weight design of deflection limited structures.Rep. Air Force Flight Dynamics Lab. Ohio, USA.AFFDL-TM-70-4
Canfield, R.A. 1990: High-quality approximations of eigenvalues in structural optimization.AIAA J. 28, 1116–1222
Fleury, C. 1979: A unified approach to structural weight minimization.Comp. Meth. Appl. Mech. Engrg. 20, 17–38
Gallagher, R.H. 1975:Finite element analysis — fundamentals. Englewood Cliffs: Prentice-Hall
Haftka, R.T.; Gürdal, Z.; Kamat, M.P. 1990:Elements of structural optimization. Dordrecht: Kluwer
Huang, N.C. 1971: On principle of stationary mutual complementary energy and its application to structural design.Zeit. ang. Math. Phys. 22, 608–620
Masur, E.F. 1970: Optimum stiffness and strength of elastic structures.J. Eng. Mech. Div. ASCE 96, 621–640
McGuire, W.; Gallagher, R.H. 1979:Matrix structural analysis. New York: Wiley
Michell, A.G.M. 1904: The limits of economy of material in framestructures.Phil. Mag. 8, 589–597
Mróz, Z. 1972: Multiparameter optimal design of plates and shells.J. Struct. Mech. 1, 371–392
Olhoff, N. 1976: A survey of optimal design of vibrating structural elements.Shock and Vibr. Digest,8, 8, 3–10,8, 9, 3–10
Prager, W.; Rozvany, G.I.N. 1977: Optimization of the structural geometry. In: Bednarek, A.R.; Cesari, L. (eds.):Dynamical Systems, pp. 265–293. New York: Academic Press
Prager, W.; Shield, R.T. 1967: A general theory of optimal plastic design.J. Appl. Mech. 34, 184–186
Prager, W.; Taylor, J.E. 1968: Problems of optimal structural design.J. Appl. Mech. 35, 102–106
Rozvany, G.I.N. 1989:Structural design via optimality criteria. Dordrecht: Kluwer
Rozvany, G.I.N.; Zhou, M. 1991a: The COC algorithm, part I: cross-section optimization or sizing.Comp. Meth. Appl. Mech. Engrg. 89, 281–308
Rozvany, G.I.N.; Zhou, M. 1991b: A note on truss design for stress and displacement constraints by optimality criteria methods.Struct. Optim. 3, 45–50
Schmit, L.A. 1960: Structural design by systematic synthesis.Proc. 2nd Conf. Electronic Comp., pp. 105–122. New York: ASCE
Schmit, L.A.; Farshi, B. 1974: Some approximation concepts for structural synthesis.AIAA J. 12, 692–699
Schmit, L.A.; Miura, H. 1976: Approximation concepts for efficient structural synthesis.NASA CR-2552
Shield, R.T.; Prager, W. 1970: Optimum structural design for given deflection.Zeit. ang. Math. Phys. 21, 513–523
Sobieszczanski-Sobieski, J.; James, B.B.; Dovi, A.R. 1983: Structural optimization by multi-level decomposition.Proc. AIAA/ASME/ASCE/AHS 24th Structures, Structural Dynamics and Material Conf. (held in Lake Tahoe, Nevada). AIAA Paper No. 83-0832-CP
Sobieszczanski-Sobieski, J.; James, B.B.; Riley, F. 1985: Structural optimization by generalized multi-level optimization.Proc. AIAA/ASME/ASCE/AHS 26th Structures, Structural Dynamics and Material Conf. (held in Orlando, Fl.). AIAA Paper No. 85-0697-CP
Starnes, J.H.; Haftka, R.T. 1979: Preliminary design of composite wings for buckling stress and displacement constraints.J. Aircraft 6, 564–470
Vanderplaats, G.N.; Salajegheh, E. 1988: An efficient approximation technique for frequency constraints in frame optimization.Int. J. Num. Meth. Engrg. 26, 1057–1069
Vanderplaats, G.N.; Salajegheh, E. 1989: A new approximation method for stress constraints in structural synthesis.AIAA J. 27, 352–358
Venkayya, V.B.; Khot, S.; Berke, L. 1973: Application of optimality criteria approaches on automated design of large practical structures.2nd Symp. Struct. Optim. (held in Milano, Italy), pp. 3.1–3.19, AGARD CP-123
Zhou, M. 1989: Geometrical optimization of trusses by A two-level approximation concept.Struct. Optim. 1, 235–240
Zhou, M. 1992:A new discretized optimality criteria method in structural optimization. Doctoral Dissertation, Essen University, FB 18/115, Düsseldorf: VDI Verlag
Zhou, M.; Rozvany, G.I.N. 1991: The COC algorithm, part II: topological, geometrical and generalized shape optimization.Comp. Meth. Appl. Mech. Engrg. 89, 309–336
Zhou, M., Xia, R.W. 1990: Two-level approximation concept in structural synthesis.Int. J. Num. Meth. Engrg. 29, 1681–1699
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Zhou, M., Rozvany, G.I.N. DCOC: An optimality criteria method for large systems Part I: theory. Structural Optimization 5, 12–25 (1992). https://doi.org/10.1007/BF01744690
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DOI: https://doi.org/10.1007/BF01744690