Attenuating performance of a polymer layer coated onto floating structures subjected to water blasts

An analytic model for the water blast response of one-dimensional marine structure coated with elastic foam

“…Therefore, the total impulse acting on the floating structure is greatly reduced. Consequently, both acceleration and strain peaks of the box induced by the first shock wave can be effectively reduced as observed in the practical experiments [6].…”

“…Figure 8 shows the typical wall pressure of a scaled ship model with and without coatings measured in the underwater explosion experiments. The pressure was measured by a pressure transducer placed 40 mm away from the wet surface of the bottom of the metal box vertically [6]. Due to the complexity of the test environment and many unknown factors of the test model, it is very difficult to predict the pressure history using the proposed analytical model.…”

“…Compared with common metallic structures, the polymer coating is often much cheaper and easier to install. Its attenuation effects have been verified by the previous experimental work [6]. A series of contrastive live fire tests were conducted on a rectangular metal box before and after coating a layer of polymer on its outer hull.…”

Mitigating performance of elastic graded polymer foam coating subjected to underwater shock

“…(b) For a given core relative density, a smaller fraction of the shock impulse is transmitted into the sandwich plates with the cores that have lower compressive strength. Some earlier works by the authors also reveal that the soft rubber foam coated onto the hull of floating structures can remarkably reduce its transient response and enhance the shock environment [11,12].…”

“…If a layer of foam coating added, the hull plate and the equipment on board may be protected by the sacrifice of outer coating. The elastic foam is selected considering the fact that it can be easily shaped and coated onto metal hull by adhesive [12]. Unlike discussions on the common uniform foam in earlier work, this paper is mainly focusing on the DGPF coating.…”