Some Theoretical and Experimental Studies on Design Development and Response Analysis of a Large Scale Orifice Type Damper Using High Yeild Smart Fluid for Artillery Gun Recoil Application

Abstract

In this research work, a detailed analysis of a recoil system of an artillery gun has newlinebeen carried out to minimize recoil length by absorbing the thrust produced due to firing newlineand bring the gun barrel to its original position for the next round of fire.The recoil length newlineminimization is always being a top concern in various structural, industrial and defense newlineapplications. The traditional passive recoil system is not able to respond quickly to the newlinechanges in the impact force. These limitations can be overcome by the introduction of a newlinesemi-active recoil system, which comprises a smart fluid damper. The electrorheological newline(ER) fluid, which has a rapid response to the applied electric field and which exhibits newlinehigh yield strength, will be a proper choice of the smart fluid in the damper for a recoil newlinesystem. The ER fluid is a typical class of plastic bingham non-Newtonian fluid whose newlinerheological behavior varies upon application of external electric field. The suitability of newlineER fluid in respective application is depends upon the ER effect requirement of that newlineapplication. An ER effect is directly depends upon the type of composition materials and newlinetheir volume fraction. The properties of composing materials viz. micro or nano scale size newlinepolarizable solid particles, their polarizability and low viscosity of base liquid play an newlineimportant role in synthesizing ER fluid with higher ER effect. Hence, the selection of ER newlinefluid compositions is made such that resulting ER fluid will exhibit desired properties newlinerequired in controlled damping system. A systematic approach is implemented to newlinesynthesize different nine samples of ER fluid specifically of bare barium titanyl oxalate newline(BTO) based, urea coated BTO and acrylamide BTO based. The sample exhibited newlinemaximum yield strength of 20 kPa at 3 kV/mm with low sedimentation rate is selected to newlineuse in ER damper recoil application. newlineAn ER damper is capable of bringing back the vibrating system to its equilibrium newlinein a very short period. In this dissertation, the general d