Softening 하중-변위 곡선을 고려한 충격저감기의 위상최적설계

This paper describes the use of topology optimization as a tool for the design of shock isolator for softening Load-Displacement behavior. The objective function is maximization of softening Load-Displacement behavior by controlling internal energy in displacement loaded structures. The geometrically nonlinear behavior of the shock isolator is modeled using total Lagrangian finite element formulation and equilibrium is found using a Newton-Raphson iterative scheme. The sensitivities in topology optimization are employed with the adjoint variable method(AVM) and the optimization problem is solved using the Sequential Linear Programming. Since the internal energy of displacement loaded system is used for the objective function, the design sensitivity number is easily derived in term of element strain energy. A cone-type disc spring model is presented to demonstrate the capability and effectiveness of the proposed method.