Structural redesign is the process of finding a new design that satisfies a set of per- formance requirements starting from a poorly performing design. Structural redesign is formulated as a two-state problem where the baseline design exhibits undesirable response characteristics and the objective design satisfies the design requirements. A LargE Admissible Perturbations (LEAP) methodology is developed to formulate and Solve the problem of structural redesign of cylindrical shells for modal dynamics. First, The nonlinear perturbation equations of cylindrical shells for modal dynamics are derived Relating the baseline to the unknown objective design.
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