Developments for Acoustic Signature Simulations for Supporting Naval Submarine Design Tools
Abstract
The proposed basic research in the area of simulation for acoustic signatures emitted from Naval vehicles will be integrated with th e NSWC/CD activity of linking core structural acoustics simulation tools with Naval Architecture design environments. As the US Nav y moves towards digital engineering, the Rapid Ship Design Environment (RSDE) offers the ability to utilize higher fidelity design a nd analysis tools earlier in the design process. RSDE is being developed by NSWC/CD under the CREATE-Ships Rapid Design Integration program, and it is meant to interact with physics based analysis solvers in order to evaluate the performance of each candidate des ign in many engineering disciplines. Utilizing physics based solvers instead of regression models is essential for investigating th e design space beyond the region represented by the available regression models. For example, if only regression models derived fro m a particular submarine class are available, then the answer to any new design investigation will always be the submarine class for which the regression models were derived. This limitation is removed by utilizing physics based solvers instead of regression mode ls. The Energy Finite Element Analysis (EFEA) solver provides such a capability for acoustic signatures and NSWC/CD is currently pu rsuing its integration with RSDE. The proposed research will develop two new key capabilities; determining accurately the input pow er from mechanical excitations (i.e. machinery) in an EFEA submarine model, and for modeling rubber mounts between a deck and the hu ll. The new capabilities will be directly applicable when using the EFEA for acoustic performance evaluations of multiple alternati ve hull configurations during a submarine design process. The capability of computing accurately the input power will enable to des ign foundation and floor structures that minimize the amount of input power entering the system due to a given mechanical excitation . This is important because it is much more effective to reduce the input power rather than dissipate it and/or redirect it away fr om the outer hull once it is present in the system. The modeling of the rubber mounts in the EFEA model will allow to configure the number, type, and location of connections between decks and the hull as part of the design process when the general arrangements of the submarine are determined.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 07, 2021
- Source ID
- N000142112785
Entities
People
- Nickolas Vlahopoulos
Organizations
- Board of Regents of the University of Michigan
- Office of Naval Research
- United States Navy