摘要:
A marine vessel which includes a bow section, a stern section and a mid-section, wherein the bow and stern sections are of different hull construction from that of the mid-section which has a curved outer shape; the skin of the hull of the bow and stern sections are preferably made of hybrid composites while the port and starboard sides of the mid-section are of hybrid composites supported on the inside thereof by a light framing to transmit pressure loads; the mid-section further includes an inner section that may be of box beam construction or longitudinal bulkhead construction.
摘要:
A marine vessel which includes a bow section, a stern section and a mid-section, wherein the bow and stern sections are of different hull construction from that of the mid-section which has a curved outer shape; the skin of the hull of the bow and stern sections are preferably made of hybrid composites while the port and starboard sides of the mid-section are of hybrid composites supported on the inside thereof by a light framing to transmit pressure loads; the mid-section further includes an inner section that may be of box beam construction or longitudinal bulkhead construction.
摘要:
An acoustic tile for masking the acoustic signature of a surface or submarine vessel and including an inner skin for securing the tile to the hull of the vessel, an outer water-impervious skin, and a core sandwiched between the inner and outer skins, the core being made of an expanded honeycomb structure being affixed to said inner and outer skins by thermocompression bonding.
摘要:
The present invention relates to acoustic and vibration attenuation compoe material, particularly to damping tiles of the Type VI class 1, suitable for use in aircraft, ship and submarine applications, that is inexpensive, does not result in an unacceptable weight penalty, and is conformable-in-place to complex curvatures. The present acoustic and vibration attenuation composite comprises a constraining layer of at least one ply of graphite fabric together with curable phenolic resin bonded to a viscoelastic layer.
摘要:
Methods for applying coverings to surfaces by casting at least a portion of the covering in a mould from a solidifiable liquid mix. The mould may be applied directly to the surface or to an already cast layer of the covering. In another embodiment an outer portion of the covering is cast in a mould and is affixed to the surface, or to an already cast layer of the covering, so as to define a void between the outer portion and the surface or already cast layer. The void is filled with solidifiable liquid mix.
摘要:
A method and an apparatus are disclosed serving to minimize acoustic emission of submerged submarines. Moving mechanical elements in an inner region give off vibrations onto an outer hull via a vibration transmission path. The vibrations are damped with damping means in the vibration transmission path. The damping means is configured as an evacuated intermediate space and is inserted in the vibration transmission path.
摘要:
An underwater craft is considerably less likely to be detected by sonar if the underwater craft includes an outer hull as disclosed herein, which outer hull may extend in a longitudinal direction through a stern section, through a midship section, and through a bow section. The outer hull in the midship section may have a polygonal cross section. The outer hull of the midship section may also have curvature along the longitudinal direction throughout the midship section. A ratio of a radius of curvature to a total length of the underwater craft in the longitudinal direction may be between 5 and 1000. Further, a cylindrical pressure vessel may be disposed under the outer hull.
摘要:
A device for reducing the effective radar cross section (RCS) of a naval vessel is proposed, the device comprising a cladding panel, which can be mounted on vessel superstructures or cargo of the naval vessel, the cladding panel being permeable to radar beams, the device also comprising a reflection means, which reflects radar beams, and the reflection means also being embedded in the cladding panel and being aligned at least partially inclined with respect to a main plane of extent of the cladding panel.
摘要:
Equipment for the reduction of the radar marking of an aircraft V, can be applied to at least one hot portion H of the aircraft, chosen from the following: a piloting cabin or cockpit, including at least one transparent portion; a first frame of the fuselage; a plurality of junction edges of components, including wings, tail veilings and engine air intakes; at least one motor face. Said equipment comprises at least one device for dissipating incident radar waves, which can be removably applied to at least one hot portion H of the aircraft without affecting the aerodynamic characteristics of the aircraft V.