The hydro-pneumatic suspension of special vehicles is mainly used to transmit vertical force and ease the impact vibration caused by uneven road surface. As a new type elastic element, Hydro-pneumatic generally uses inert gas or nitrogen as medium hydraulic oil transmission medium. Compared with ordinary leaf springs coil springs, it has advantages small size strong load-bearing capacity. This ...

This work aims at enhancing the understanding and to provide improved models of the dynamic behavior of rubber vibration isolators which are widely used in mechanical systems. Initially, a time domain model relating compressions to component forces accounting for preload effects, frequency and dynamic amplitude dependence is presented. The problem of simultaneously modelling the elastic, viscoe...

Two hundred and seventeen total hip replacements were performed during a trial designed to assess the influence of a surgical isolator upon postoperative wound infection. The trial was controlled by performing 108 of the replacements in a standard plenumventilated theatre with twenty air changes/hr, which also housed the isolator procedures. Comparative postoperative wound infection rates were ...

Reducing the radiated noise from ships is becoming increasingly important as ship -builders aim to reduce the disturbance to marine life, passengers and crew. A major contributor is on-board machinery which typically radiates noise to the water column from both structure-borne and air-borne transmission paths. Problematic machinery is often decoupled from the hull by supporting it on resilient ...