PREDICTING WAVE-INDUCED LOADS IN COMPLEX SEAWAYS ON SHALLOWLY SUBMERGED VESSELS
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Authors
Whitmer, Andrew R.
Subjects
wave-induced loads
near surface operation
shallowly submerged vehicle
multi-component seaway
linear superposition
load predictions
near surface operation
shallowly submerged vehicle
multi-component seaway
linear superposition
load predictions
Advisors
Klamo, Joseph
Date of Issue
2018-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
This thesis analyzes the validity of using linear superposition to accurately predict the forces and moments on a shallowly submerged vessel in a complex seaway. Linear superposition implies that the forces and moments due to the complex seaway are simply the summation of the forces and moments of the single regular waves that combine to create the complex seaway. The forces and moments are measured on a UUV-shaped model in the tow tank with wave making capability at the Naval Postgraduate School with the aid of various data collection processes. First, the forces and moments due to single regular waves are studied. Single regular wave results are then combined to predict what complex waveform loads would be and the accuracy is assessed. The results show that linear superposition is a valid assumption over the wave heights and frequencies tested, especially for wavelengths greater than the length of the submerged body when the submerged depth is twice the diameter of the body.
Type
Thesis
Description
Series/Report No
Department
Systems Engineering (SE)
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NPS Report Number
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Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.