TY - CONF
TI - Advancing the Modelica Ocean Engineering Toolbox With the Capability to Generate Accurate Wave Excitation Forces
AU - Menon, A
AU - Haider, A
AU - Bubbar, K
T2 - 43rd International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2024)
C1 - Singapore
AB - The Ocean Engineering Toolbox (OET) is an open-source, Modelica™ compliant symbolic library capable of simulating the dynamic motions of floating bodies subject to polychromatic, unidirectional waves. This paper presents recent advancements in the OET: (1) the development of custom components to represent the frequency-dependent wave excitation force and (2) significant improvements in the toolbox’s computational performance. While the Modelica language can represent complex cyber-physical systems efficiently, the primary challenges with modeling wave-induced floating bodies are (1) non-compatibility with frequency-dependent variables, (2) lack of hydrodynamic components in the Modelica Standard Library (MSL), and (3) integration with the previous version of the OETv0.1. In the time-domain implementation, surface elevation profiles can now be generated for regular and irregular waves, with three spectral options for polychromatic seas: Pierson-Moskowitz (PM), Bretschneider, and Joint North Sea Wave Project (JONSWAP). Hydrodynamics coefficients are imported using a MATLAB script to process the output from Boundary Element Method (BEM) codes. A novel symbolic implementation of spectral decomposition and interpolation is presented in this work to generate the frequency-dependent excitation force in Modelica. Results from the OET are compared against data generated from WEC-Sim, validating both the wave excitation force and the corresponding system dynamic response for a floating point absorber in heave. These developments lead to superior simulation accuracy and computational performance while expanding the hydrodynamic modeling capabilities of Modelica.
DA - 2024/08//
PY - 2024
SP - 9
PB - ASME
UR - https://asmedigitalcollection.asme.org/OMAE/proceedings-abstract/OMAE2024/87851/V007T09A069/1202763
DO - 10.1115/OMAE2024-125573
LA - English
KW - Wave
KW - Point Absorber
KW - Modeling
KW - Hydrodynamics
ER -