Abstract

Pneumatic and hydraulic shock absorbers commonly take the form of a cylinder with a sliding piston inside. The cylinder is filled with a fluid (such as hydraulic fluid) or air. This fluid-filled piston/cylinder combination is dashpot. The shock absorbers duty is to absorb or dissipate energy. One design consideration, when designing or choosing a shock absorber, is where that energy will go. In most dashpots, energy is converted to heat inside the viscous fluid. In hydraulic the hydraulic fluid will heat up, while in air cylinders, the hot air is usually exhausted to the atmosphere. In other types of dashpots, such as electrons, the dissipated energy can be stored and used later. In general terms, shock absorbers help cushion cars on uneven roads. Shock absorbers are an important part of automobile and motor cycles us pensions,aircraft gear, and the supports for many industrial machines Large shock absorbers have also been used in structural to reduce the susceptibility of structures to earthquake damage and resonance. A transverse mounted shock absorber,called away helps keep railcars from swaying excessively from side to side and are important in passenger commuter railandrapid transit systems because they prevent railcars from damaging station platforms. The success of passive damping technologies in suppressing vibration amplitudes could be ascertained with the fact that it has a market size of around $ 4.5 billion.

Description