Design of a Hydraulic Substitute Base for Demolition Hammers

Substitute bases for demolition hammers should emulate mineral materials. Their advantage over mineral materials is that they are not destroyed by the energy of high-frequency impacts, enabling repeatable tests for the development of demolition hammers. To date, no substitute bases are known that can represent a wide range of different materials in an equivalently effective manner. This paper presents a hydraulic substitute base whose stiffness and damping can be adjusted by varying oil volume, orifice cross-section, and preload pressure.