Advanced Finite Element Analysis for Ships

Predicting the effects of underwater explosions is challenging as the target can be subjected to different types of loading depending on the device size, how close it is to the target, and the depth of the water in the immediate vicinity.

A typical underwater explosive will generate a strong shock wave that can disable critical equipment due to vibration response. It may also generate effects that can damage the ship hull.

Following the initial shock wave, the high-pressure gases formed by the explosive combustion expand to form a large bubble. After a critical size is reached the bubble collapses and restarts the expansion.

If there is a solid surface in the vicinity of the bubble, the bubble will collapse, producing a jet of high velocity water that can result in significant local damage, possibly breaching the ship hull.

The Lloyd’s Register’s Applied Technology Group (ATG), in conjunction with their Naval clients and industry groups has developed tools to support experimental programs for both predicting pressure loading due to underwater explosions and the response of global ship models to these loads.

Assurance that vessels can meet survivability requirements during the design, commissioning and at other points during their operational life as new threat and operating requirements emerge.

LR has proven experience working with clients and industry groups to support development of  standards and tools which have been used to support fleet operations over the past 20 years.