Submarine Acoustics Engineering

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Advanced experimental submarine acoustic testing is used as the basis for the development of the next generation submarine and/or improvements to be backfit into existing submarines. The ultimate measure of success of the theory, characterization, control technique, or treatment is the demonstration of validity or effectiveness in full scale. A comprehensive program for acquiring data has evolved that makes maximum use of the limited resources available for full-scale testing. This program includes large-scale model testing as a supplement to full-scale testing.

DDL OMNI provides technical support for large-scale model advanced submarine acoustic tests. There are two phases to the installation and preparation of large-scale models for testing. The first is concerned with the hull, superstructure, control surfaces, and dome. The second is concerned with the interior instrumentation used in the testing that may include hydrophones, shakers, accelerometers, strain gauges, dynamometers, proximity gauges, pressure gauges, angular encoders, microphones, signal conditioning, calibration circuitry, and the analog recording devices. A typical evolution begins with the laboratory checkout and grooming of all electronics. The model is modified with a scaled model of the device associated with the test. Then the instrumentation is installed in the model and tested again. The instrumented model is transported to the lake test area for execution of the test. At the completion of the test, a technician will remove the flight path cassette and analog tape for analysis ashore. Each tape is analyzed and compared to expected results from theoretical values or similar historical data takes. The data are assembled into a detailed report for the project engineer to disseminate to cognizant authorities.