Tests for shock characteristics of isolators under multidirectional shocks

Shock loads imposed on equipments are often multidirectional. At the same time, the isolators installed under equipments have multidirectional distortions. In this condition, the shock characteristics of isolators are different from those of unidirectional shocks in a lab. The references about the influence of multidirectional shocks on shock characteristics of isolators are much less both home and abroad at present, and it is necessary to conduct some groping for this problem. Here, the shock characteristics along two directions of BE120 and EA120 isolators were tested using drop hammer impact test machine. The results showed that the shock stiffnesses of isolators are related to their main axis direction stiffness. The results could not represent the shock features of all types of isolators due to lack of test samples.