Experimental and Numerical Investigation of Engine Foundation for Vibration Reduction

Varanasi Ramakrishna; Shinadam Rama Krishna; PVS Ganesh Kumar

doi:10.14429/dsj.68.12705

Varanasi Ramakrishna DRDO Naval Science and Technological Laboratory Visakhapatnam
Shinadam Rama Krishna GVP College of Engineering Visakhapatnam
PVS Ganesh Kumar DRDO Naval Science and Technological Laboratory Visakhapatnam

DOI: https://doi.org/10.14429/dsj.68.12705

Keywords: Engine foundation, Frequency response, Topology optimisation, Vibration reduction

Abstract

The purpose of this study is to minimise frequency response of engine foundation using topology optimisation. The study involves vibration response estimation of an existing marine engine foundation, validation of estimations with measurements and estimation of reduction in vibration response after optimisation. Initially, solid model of baseline model is generated using dimensions of the existing foundation measured by a laser line probe coordinate measuring machine. Harmonic analysis is used to find the vibration response of the foundation. These results are experimentally validated by the measurements on the foundation using the vibration testing. Frequency response topology optimisation is then carried out on the baseline model to reduce vibration response with specified constraints and objective function. Subsequently, harmonic analysis is performed on the topology optimised design to verify the reduction in vibration response. From these results, it is observed that considerable frequency response is reduced with modified design compared to baseline model.

Author Biographies

Varanasi Ramakrishna, DRDO Naval Science and Technological Laboratory Visakhapatnam

Mr V. Rama Krishna, Scientist ‘E’ is presently working as Associate Project Director (APD) for Advance Light weight Torpedo (ALWT) at DRDO-Naval Science and Technological Laboratory, Visakhapatnam. He has research experience in the fields of Vibrations, acoustics, environmental testing, stealth project, development of rocket motors for Agni missiles.

Shinadam Rama Krishna, GVP College of Engineering Visakhapatnam

Dr S. Rama krishna, Associate Professor working in GVP College of Engineering, Visakhapatnam. He has research experience in the fields of vibrations. He has published more than 30 paper in journals and conference proceedings and also published one patent on reduction of motor fan noise and vibrations.

PVS Ganesh Kumar, DRDO Naval Science and Technological Laboratory Visakhapatnam

Mr P.V.S. Ganesh Kumar, Scientist ‘H’ is presently working as Associate Director at DRDO-Naval Science and Technological Laboratory, Visakhapatnam and Principal Technology Director for Signature Management Technology Directorate and Project Director for EAST Project. He has research experience in the fields of vibrations, acoustics, environmental testing, stealth project, IR, RCS, ELFE and magnetics.