NICOP - Modeling and Simulation of Ship Motions in an Icy- Fluid Field
Abstract
Modeling and Simulation of Ship Motions in an Icy- Fluid Fielda. Technical: The proposed effort is to develop a novel fluid/wind/solid/structure coupled numerical algorithm and computer code to simulate the interaction among moving marine vehicle, fluid, wind, and floating icebergs. The motions of structures and solids are analyzed by the Vector Formed Intrinsic Finite Element Method (VFIFE). Fluid flows and hydrodynamic forces will be computed by a Large Eddy Simulation (LES) model, and the free surface is tracked by the Volume-of-Fluid (VOF) method. By the two-way coupled Moving Solid Algorithm (MSA), the fluid response from the solid motion is modeled through specifying the cell centered velocity with incompressible constrain. The displacement and rotation of the icebergs or objects in the sea interacted with marine vehicle or structure and other icebergs will be calculated by the Discrete Element Method (DEM). Laboratory experiment data will be used to verify the accuracy and capability of the fluid/solid/structure interaction analysis code. The proposed effort is a one-year pilot effort. If successful, Dr. Paul Hess will be interested in co-fund a 3-year follow-on effort. b. Relevance: With opening of the northern shipping route through the Arctic, it is becoming increasingly important to evaluate the ice-loading on naval ships due to potential missions in ice-infested waters. The ice load depends on the structure-ice interaction process which involves complex contact mechanics: ice material failure, rigid-body motion of the broken ice pieces, ice-ice and ice-structure friction and fluid/wind effects. Moreover, the boundary conditions of the managed ice domain have an influence on the load-response relationship of the dynamical system, leading to highly nonlinear and complex behavior. The proposed state-of-the-art research is closely matched with the research needs identified in the US Naval S&T Strategic Plan especially the ~Platform Design and Survivability~ S&T focus area. It provides U.S. Navy the critically needed capability for evaluation of ice loads on ships. c. Coordination: Dr. Thomas Fu and Dr. Paul Hess (ONR Code 331) d. Desired Outcome: (1) effectiveness of the proposed method for evaluation of ice loads, (2) critical issues related to accurate prediction of ice loads, (3) detail report of the development and test results, and (4) potential future collaboration with the US partners to advance state-of-the-art methodology for ice loads and structure responses.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N629091612108
Entities
People
- Chung-yue Wang
Organizations
- Office of Naval Research
- United States Navy