A Study on the Finite Element Modeling and Analytical Parameters for the Dynamic Stiffness Evaluation of Shipboard Equipment Foundations

Abstract

This paper studies the finite element modeling and analytical parameters for the numerical evaluation of dynamic stiffness of large foundation for shipboard equipments such as marine diesel engine. For the purpose, numerical method and procedure to evaluate the dynamic stiffness are established based on the impact test method, which are applied for the dynamic stiffness evaluation of a real diesel generator foundation of ship. Numerical investigations compared with the measured data are carried out to evaluate the effects of modeling ranges of ship substructure, finite element sizes, lower support structures and damping coefficients. From the results, modeling and analytical parameters for proper evaluation of dynamic stiffness of large foundation of shipboard equipment are suggested.

Mobility Assessment of Equipment Foundation using Fluid-loaded Whole Ship Model

“…이에 선박 설계 및 건 조단계에서 장비 받침대에 대한 충격 시험(impact test), 가진기 시험(exciter test) 등의 실험적 방법 (Aatola, 2002), 유한요소법 (finite element method)을 기반으로 한 수치해석적 방법 (Kim, et al, 2008;Kim, et al, 2010), 경험식(empirical formula, Petersson, 1980) …”