Design Of Vertical Ballistic Pendulum For Impulse Measurement

Abstract

This paper presents the design of Vertical Ballistic pendulum for Impulse measurement. The purpose of this pendulum is to determine the impulse load imparted on the target plate on detonation of buried charge. Landmines are a major threat to survivability of light weight vehicles. They present a significant challenge to protect platforms because of the large impulse loads induced from the buried charge. To overcome this problem, the design of survivable platforms requires the ability to withstand the impulse generated from buried mines. The impulse load that a buried charge applies on a target plate on detonation is characterized in terms of Vertical Impulse. The vertical impulse is a function of the size of the charge, its depth of burial, i.e. the distance between the soil surface and the target plate. The Vertical ballistic pendulum is used to measure the vertical impulse generated. The design structure of pendulum has to withstand the loads when the target plate is subject to explosion of landmine buried under dry construction sand. The target plate is clamped with the Vertical Ballistic Pendulum and an arrangement is made between the supporting structure and ballast pendulum by placing a compression spring to measure the vertical

impulse generated after detonation.