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Constraint paths in non-linear structural optimization
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DOI：10.1016/j.compstruc.2014.05.003.png)
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Abstract
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Optimization of significantly non-linear structures is a demanding task. The paper discusses how boundaries of the feasible region can be followed as generalized equilibrium paths in parametric space, reflecting engineering demands on stiffness, strains and stability. Solutions on the constraint paths are then evaluated with respect to any chosen objective function. For few design parameters, this approach is efficient and robust. This is demonstrated for a pre-stressed pressurized membrane of three parameters, showing several constraint paths for the problem, and indicating how these are used in optimization. The view is often closer to engineering design analyses than the mathematical optimization settings, which often has problems in handling stability constraints. (C) 2014 Elsevier Ltd. All rights reserved.
Keywords:
Space membranes
Solution manifolds
Parameter dependence
Stability constraint
Hyper-elastic material
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