The ability to evaluate noise levels at early design stages is beneficial to ship designers seeking to satisfy requirements of both cabin noise and underwater noise. Poorly controlled noise can negatively impact comfort, safety, stealth, and the surrounding marine environment. Common numerical noise prediction methods include Statistical Energy Analysis (SEA), Finite Element Analysis (FEA), Boundary Element Method (BEM), or hybrid methods. Regardless of the approach, a 3D ship model is often a prerequisite. However, maintaining an accurate 3D model is not always feasible during early design stages. A new CAE design tool, the Marine Modeler, quickly builds 3D acoustic ship models from basic information, potentially of low-fidelity. To build a complete ship model, the required inputs are 2D drawings of decks, a 2D body plan, and an Excel file containing information for primary structural components. The body plan and certain structural information can be omitted for a 3D model representing only the habitable spaces onboard. SEA Models are built in seconds to minutes without the use of parallel computing. After generating the 3D model, additional operations can be performed within the Marine Modeler Module to create acoustic cavities, assign physical properties, apply noise control treatments, and apply loads including static exterior fluid loading.
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A Semi-Automatic Tool for Building 3D Acoustic Ship Models
Ricardo de Alba Alvarez;
Paper presented at the SNAME Maritime Convention, Providence, Rhode Island, USA, October 2018.
Paper Number: SNAME-SMC-2018-093
Published: October 24 2018
Yang, Wenlong, de Alba Alvarez, Ricardo, and Marc Woolliscroft. "A Semi-Automatic Tool for Building 3D Acoustic Ship Models." Paper presented at the SNAME Maritime Convention, Providence, Rhode Island, USA, October 2018.
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