Damping Modeling Strategy for Naval Ship System

Abstract

The damping modeling strategy for naval ship system is presented for ship shock transient time-domain analysis. The Complex Exponential Method is used for extraction of modal parameters in time-domain. Inverse Fourier Transform of Mobility form for general viscous damping model is used to verify the calculated modal parameters. Rayleigh damping parameters are calculated using modal frequency and modal damping ratios. The statistical characteristics of Rayleigh damping parameters are quantified and evaluated in each categorized area: keel, bulkhead and deck. Then the Rayleigh damping parameters are recommended for ship shock response prediction. The damping studies were conducted using 2000 ms data based on DDG 53 Ship Shock Trial.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2003
Accession Number
ADA419249

Entities

People

  • Ilbae Ham
  • Young-sik Shin

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Arleigh Burke Class
  • Bulkheads
  • Curve Fitting
  • Data Sets
  • Destroyers
  • Engineering
  • Extraction
  • Frequency
  • Frequency Domain
  • Mechanical Engineering
  • Mobility
  • Navy
  • Operating Systems
  • Resonant Frequency
  • Ships
  • Time Domain
  • Uss John Paul Jones

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Control Systems Engineering.
  • Naval Architecture and Marine Engineering.