© 2016, IJCERT All Rights Reserved DOI: 10.22362/ijcert/2016/v3/i9/48864 Page | 461 Volume 3, Issue 9, September-2016, pp. 461-471 ISSN (O): 2349-7084 International Journal of Computer Engineering In Research Trends Analytical and Parametric Optimization of Force Transmissibility by Taguchi Method for Double Stage Engine Mountings G.C.Mekalke 1 , R.R.Kolhapure 2 DKTE’S Textile and Engineering Institute, Ichalkaranji Abstract: It is essential to design a warship to avoid detection by submarines or enemy ships. One of the recent techniques used is to mount all vibrant machinery on a double stage vibration isolation system. For high structure-borne noise attenuation there is requirement of two-stage mounting system. The main goal of current research work is to reduce vibration levels from machinery to foundation, and thereby to reduce radiate noise levels from ship hull. The present work deals with the mathematical modeling and parametric optimization of force transmissibility (Ftr) for design of engine foundation system. The vertical vibrations of the system are assumed to be most predominant, and other types of vibrations are neglected. The research work is carried out for finding parameters of mounts and optimizing the same. The analysis is based on discrete system modeling. Taguchi method is used for finding optimal combination of process parameters based on S/N ratio and analysis of variance (ANOVA) is statistical technique to investigate contribution of each process parameters on the performance characteristic. The result shows that spring stiffness is most affecting process parameter. Keywords: Double stage vibration isolation, Two-degree freedom systems, Taguchi, ANOVA ——————————  —————————— 1. INTRODUCTION In case of a warship, engine foundations are usually designed as a double stage foundation in which engine is mounted on anti-vibration mounts which are further mounted on a raft foundation. This raft is again supported on the hull girder through another set up of springs and dampers which act as the second layer mounts. The hull girder may be treated as the fixed support. Thus the engine-mount-foundation system can be modelled as a two-degree freedom system with certain assumptions. Double mounting is an isolation practice in which two mounts are separated by auxiliary mass at each location. This serves two objectives as follows to isolate base from engine vibration (force transmissibility) Available online at: www.ijcert.org