A tank is provided that reduces sloshing pressures in the corner sections
of a tank, such as an LNG membrane tank. The tank includes a sloshing
impact reduction system placed in selected corner sections within the
tank. The system serves as a slosh attenuation system, and reduces the
severity of the corner geometry and improves the flow of fluids into the
tank corner. In one embodiment, an impermeable structure is disposed in
an internal corner section of the tank. The impermeable structure may be
a triangular planar surface, or a non-planar structural surface. The
non-planar structural surface may be a concave surface or other curved
surface. In another arrangement, a permeable structure is placed in an
internal corner section of the tank. Such a permeable structure would
enable fluid to pass through the device, but would reduce the fluid
velocities and accelerations via friction or eddies. The permeable
structure may be either rigid or flexible.