Simulation Time History and Access Time History Programs (Users Manual)

Abstract

The Simulation Time History Computer Program, STH, has been developed at the Carderock Division of the Naval Surface Warfare Center to provide realistic, random wave time histories of the six-degree-of-freedom (6DOF) ship responses, i.e., surge, sway, heave, roll, pitch, and yaw. The 6DOF origin time histories are developed using transfer functions obtained from the Navy Standard Ship Motion Computer Program, SMP84. The random waves are simulated using a two- parameter Bretschneider wave spectral model. The random waves are represented as either undirectional (longcrested) or spread + or - 90 degrees about a predominant direction (shortcrested). A separate Access Time History Computer Program, ACTH, has been developed to provide additional displacements, velocities, and accelerations at various locations on the ship. Force time histories, which include gravity, are computed in the ship's body axis coordinate system. The ACTH program utilizes the origin time histories generated from the STH program.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1993
Accession Number
ADA265386

Entities

People

  • C. J. Bennett
  • T. R. Applebee
  • W. G. Meyers

Organizations

  • Naval Surface Warfare Center Carderock Division

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Access Time
  • Center Of Gravity
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Data Sets
  • Databases
  • Engineering
  • Equations
  • Equations Of Motion
  • Frequency
  • Frequency Domain
  • Gaussian Distributions
  • Operating Systems
  • Personality
  • Relative Motion
  • Simulations

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computer Science.
  • Control Systems Engineering.