PANDA - interactive program for minimum weight design of stiffened cylindrical panels and shells. An analysis and an interactive computer program are described through which minimum weight designs of composite, elastic-plastic, stiffened, cylindrical panels can be obtained subject to general and local buckling constraints and stress and strain constraints. The panels are subjected to arbitrary combinations of in-plane axial, circumferential and shear resultants. Nonlinear material effects are included if the material is isotropic or has stiffness in only one direction (as does a discrete or a smeared stiffener). Several types of general and local buckling modes are included as constraints in the optimization process, including general instability, panel instability with either stringers or rings smeared out, local skin buckling, local crippling of stiffener segments, and general, panel and local skin buckling including the effects of stiffener rolling. Certain stiffener rolling modes in which the panel skin does not deform but the cross section of the stiffener does deform are also accounted for. The interactive PANDA system consists of three independently executed modules that share the same data base. In the first module an initial design concept with rough (not necessarily feasible or accurate) dimensions are provided by the user in a “conversational” mode. In the second module the user decides which of the design parameters of the concept are to be treated by PANDA as decision variables in the optimization phase. In the third module the optimization calculations are carried out. Examples are provided in which optimum designs obtained by PANDA are compared to those in the literature.

References in zbMATH (referenced in 32 articles , 1 standard article )

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  1. Silva, N.M.F.; Camotim, D.; Silvestre, N.; Degenhardt, R.: On the use of generalized beam theory to assess the buckling and postbuckling behavior of laminated CFRP cylindrical stiffened panels (2010)
  2. Papadopoulos, Vissarion; Papadrakakis, Manolis: The effect of material and thickness variability on the buckling load of shells with random initial imperfections (2005)
  3. Awrejcewicz, J.; Krysko, V.A.: Some problems of analysis and optimization of plates and shells (2003)
  4. Lamberti, Luciano; Venkataraman, Satchi; Haftka, Raphael T.; Johnson, Theodore F.: Preliminary design optimization of stiffened panels using approximate analysis models (2003)
  5. Bushnell, David: Global optimum design of externally pressurized isogrid stiffened cylindrical shells with added T-rings (2002)
  6. Kasperska, Renata; Ostwald, Marian: Multicriteria optimization of sandwich cylindrical panels under axial compressive loads. (2002)
  7. Elishakoff, Isaac; Li, Yiwei; Starnes, James H.jun.: Non-classical problems in the theory of elastic stability (2001)
  8. Życzkowski, Michał; Krużelecki, Jacek; Trzeciak, Piotr: Optimal design of rotationally symmetric shells for buckling under thermal loadings (2001)
  9. Gavrilenko, G. D.: The stability and load-carrying capacity of incomplete shells (2000)
  10. Watson, A.; Kennedy, D.; Williams, F.W.: Design of structures by a splitting method (1999)
  11. Bedair, Osama K.: A contribution to the stability of stiffened plates under uniform compression (1998)
  12. Li, Yi-Wei; Elishakoff, Isaac; Starners, James H.jun.; Bushnell, David: Effect of the thickness variation and initial imperfection on buckling of composite cylindrical shells: Asymptotic analysis and numerical results by BOSOR4 and PANDA2 (1997)
  13. Romeo, Giulio; Frulla, Giacomo: Post-buckling behaviour of graphite/epoxy stiffened panels with initial imperfections subjected to eccentric biaxial compression loading (1997)
  14. Bushnell, D.; Bushnell, W.D.: Approximate method for the optimum design of ring and stringer stiffened cylindrical panels and shells with local, inter-ring, and general buckling modal imperfections (1996)
  15. Muc, Aleksander: Layout optimization of doubly-curved laminated composite shells of revolution (1996)
  16. York, C.B.: Influence of continuity and aspect-ratio on the buckling of skew plates and plate assemblies (1996)
  17. Bushnell, D.; Bushnell, W.D.: Optimum design of composite stiffened panels under combined loading (1995)
  18. Gavrilenko, G.D.: Stability of smooth and ribbed shells of revolution in a nonuniform stress-strain state. (Survey) (1995)
  19. York, C.B.; Williams, F.W.: Buckling analysis of skew plate assemblies: Classical plate theory results incorporating Lagrangian multipliers (1995)
  20. Butler, R.; Tyler, A.A.; Cao, W.: Optimum design and evaluation of stiffened panels with practical loading (1994)

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