Lim K., Wang S., Kim C.

Shock loading among various mechanical loading has very short duration and cannot be expected, so it can easily damage equipments. The possibility of damage from shock may be evaluated from the simulation (FEA, SEA, etc.) or test (drop shock test, shock test using electrodynamic shaker, etc.) The design of shock isolators is considered to reduce damages from shock by storing energy and releasing it relatively long time. The shock isolation problem, which is characterized by its time dependency, is expressed as force-deflection relation, which represents efficiency of shock isolator, without any time dependency. To improve shock absorbing capability of the shock isolator, complementary work in force-deflection relation of the structure is minimized. Topology optimization for main design domain and support area is performed to realize improved shock isolator. The geometrical nonlinearity is considered in the calculation of the design sensitivity of the main design domain. All processes are applied to the design of the shock isolator which is under ballistic shock environment.