Experimental and numerical investigation on wave-induced loads acting on intact and damaged naval combatant vessel

Student thesis: Doctoral Thesis

Abstract

In this study, wave-induced loads acting on an intact and damaged naval combatant vessel are investigated experimentally and numerically. Experimental tests are carried out with a double-bottom naval combatant vessel DTMB 5415, which has been widely used in benchmark studies for experimental investigation and the validation of numerical simulations. Free decay tests in roll with and without moorings are implemented in calm water, while the model is moored at the bow and stern during the tests in regular waves.In order to investigate the performance of the intact and damaged ship in beam waves the damaged opening is located at starboard midship so that floodwater may ingress and egress from the opening from which two compartments can be flooded.It is shown that beam waves flooding in and out from the damaged opening and the interaction between ship behaviour and water surface effect in the damaged compartments have a significant impact on ship motions and wave-induced loads acting on the ship. And it can be observed that highly nonlinear wave-induced loads can be induced on the intact and damaged ship hull in regular beam waves.Two cases under the regular beam wave condition are investigated by CFD-based RANS method. The method is proposed to calculate wave-induced loads acting on the intact and damaged ship model. For validation of the numerical method, comparison between numerical estimation and experimental measurement shows that solution by RANS method have a generally good qualitative agreement with physical tests.
Date of Award1 Oct 2016
LanguageEnglish
Awarding Institution
  • University Of Strathclyde
SponsorsUniversity of Strathclyde
SupervisorAlexander Day (Supervisor) & Evangelos Boulougouris (Supervisor)

Cite this