Submarine Target Strength
Application ID: 90091
The primary defense of a submarine lies in its capacity to remain hidden during operation. As radio waves are strongly absorbed by seawater, sound navigation ranging, or sonar, is one of the main methods used for the detection of submarines. Sonar systems are also used for underwater exploration as well as in the fishing industry.
Designers analyze the way acoustic waves are reflected in order to minimize the equivalent reflecting area of the submarine. The target strength, or TS, is a measure of the area of a sonar target. This tutorial presents a simplified method to analyze the TS of the benchmark target echo strength simulation (BeTTSi) benchmark submarine.
This model is acoustically large and takes advantage of the stabilized formulation in the Pressure Acoustic, Boundary Elements interface (BEM). Enabling the stabilized formulation ensures convergence for large models (high frequency or large domains) at the cost of some additional degrees of freedom.
This model example illustrates applications of this type that would nominally be built using the following products:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Tabella delle Funzionalità and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.