Multi-Purpose Floating Structures are special design in water floating structures applications, long lasting and easy for replacement. It is the most economical and safe way to build a floating structure to suit for anything that are floated on the water. The mounting frames are designed with capability of ensuring system integration, components replication, cost reduction and modularization by using recycled plastic drums or other floating containers.

Methods and systems for operating a stable platform in a far-offshore deep-sea environment. The platform can advantageously be a wind power generation station. A structural framework carries (for example) the wind turbine in an elevated position. Multiple points on the floating structure are connected both to a surface float and to a deep mass (e.g. an enclosed volume of seawater).

An offshore floating structure is provided including a floater with positive buoyancy and a keel with negative buoyancy, as well as active and passive suspenders connecting nodes of the keel and the floater with each other. When the keel at the offshore site is lowered by making the active suspenders longer, the passive suspenders, which have a fixed length and are held taut, causes the keel to rotate about the vertical during lowering.

Floating TLP wind turbine comprising a buoyancy structure, a plurality of braces, one or more tensioned mooring lines for each brace, and a support structure arranged on the buoyancy structure. The braces extend radially outwardly from a region of the buoyancy structure or support structure, each brace having a distal end portion with respect to the buoyancy structure or support structure. Each distal end portion of the braces comprises a guiding element to allow a guided passage of a tensioned mooring line. Each of the tensioned mooring lines is anchored to the seabed at a first end, and attached/coupled to a region of the buoyancy structure or support structure at a second end, said region being above the region of the buoyancy structure or support structure from which the braces extend radially outwardly. Each tensioned mooring line is guided by the guiding element of the corresponding brace.

A method for constructing a floater for a floatable wind energy power plant includes providing a first pre-assembled part with at least one first connection arrangement, providing a second pre-assembled part with at least one second connection arrangement, arranging the at least one first connection arrangement of the first pre-assembled part proximate to the at least one second connection arrangement of the second pre-assembled part so as to form a connection site which includes at least a part of the at least one first connection arrangement and at least a part of the at least one second connection arrangement, sealingly arranging an enclosure about the connection site so as to seal the enclosure against an ingress of water, and connecting the first pre-assembled part and the second pre-assembled part at the connection site. Each of the first pre-assembled part and the second pre-assembled part are floatable.

Methods and systems for operating a stable platform in a far-offshore deep-sea environment. The platform can advantageously be a wind power generation station. A structural framework carries (for example) the wind turbine in an elevated position. Multiple points on the floating structure are connected both to a surface float and to a deep mass (e.g. an enclosed volume of seawater).

An offshore renewable energy system mounting platform is provided for positioning a renewable energy converter in a body of water. The platform includes a frame having a first structural member and a second structural member that are positioned adjacent one another at a mating connection and at least one mooring member affixed to the frame at a tethering location which is tethers the frame to a bed of the body of water. Either the first or second structural members comprises a buoyancy and a tension in the mooring member is arranged to counteract the buoyancy to urge the first and second structural members together at the mating connection. The platform may be manufactured as a set of pre-fabricated modular components which are subsequently assembled into the complete platform.

A sandwich construction element (100) is disclosed. The sandwich construction element comprises a first element (101) with a face, extending in a longitudinal direction with a thickness and a height being smaller than the longitudinal length, and a second element (102) with a face, extending in the same longitudinal direction as the first element with a thickness and a height being smaller than the longitudinal length, wherein the second element is facing the flat face of the first element (101). The sandwich construction element further comprises an open core structure (103) arranged between, and operatively connected to the first element (101) and the second element (102), wherein the open core structure comprises a plurality of close packed tetraeder structures (201).

A floating structure based on the tensegrity principle is described. A planar closed loop structure (1700) has a plurality of beams (300) and a plurality of beam adapters (700). Each of the plurality of beams (300) is formed by coupling multiple n-strut twisted prism units. Each of the multiple n-strut twisted prism units includes n-sided planar polygonal surfaces on opposite sides through which the respective n-strut twisted prism unit is coupled to another n-strut twisted prism unit or a beam adapter. Each of the plurality of beam adapters (700) is an m-strut twisted prism unit having planar polygonal side faces for coupling to an n-sided planar polygonal surface of a beam (300).

A support structure floating in the open sea and connected to anchors by bracing elements. The support structure has a first component arranged under water and a second component cutting through the surface of the water. Furthermore, the first component has first buoyant bodies arranged at corner points of a polygon and serving as carriers of the second component and second buoyant bodies connecting them with one another and having a tube shape. A nodal structure connecting at least two second buoyant bodies with one another and at least one U-shaped junction plate are arranged in the first buoyant body. The nodal structure is simultaneously the carrier for a tube-shaped support element and is therefore a node of the underwater support structure that absorbs and channels off forces in connection with the junction plate. The second component has the tube-shaped support elements cutting through the surface of the water.