M2 Internship – Acoustic Transparency of Composite Structures for Low- and High-Frequency Underwater Applications
The CEMIS (Center of Expertise for Information and Signature Management) at Naval Group is offering a final-year internship in collaboration with the APY department at the Institute of Mechanics and Engineering-Bordeaux (I2M). Composite materials are increasingly used in naval engineering as they enable lightweight, high-strength structures with the advantage of being acoustically transparent in underwater environments. Some of these materials are involved in acoustically sensitive components, where neutrality is required to ensure optimal operation of onboard sonar detection systems. The acoustic transparency of these composites is critical to system performance.
The internship’s objective is to model and quantitatively analyze the impact of various structural and material characteristics of these composites on their acoustic properties, such as reflection-transmission behavior, waveguiding within the structure, and more. Among the numerous composite design parameters, the acoustic role/impact of some remains poorly understood, particularly for strong material anisotropies in the case of oblique incidences, thin coatings, and curvature effects. The intern will develop modeling tools using mathematical techniques for which I2M has strong expertise. These tools will predict the acoustic performance of existing structures and aid in the design of new ones (e.g., optimization).
More information on the link below.