A method of assembling a floating wind turbine platform includes forming a base assembly of the floating wind turbine platform in either a cofferdam or a graving dock built in water having a first depth. The base assembly includes a keystone and a plurality of buoyant bottom beams extending radially outward of the keystone, wherein longitudinal axes of each of the plurality of bottom beams are coplanar. The cofferdam or the graving dock is flooded and the assembled base assembly is floated to an assembly area in water having a second depth. A center column and a plurality of outer columns are assembled or formed on the base assembly, a tower is assembled or formed on the center column, and a wind turbine is assembled on the tower, thereby defining the floating wind turbine platform.

A method for manufacturing a structural surface heat exchanger of preset or left-hand final shape for an aircraft includes the steps of forming, shaping and assembling, by welding or brazing, a first corrugated skin and a second smooth skin in order to obtain channels. Each channel is delimited by a corrugation of the first skin and the second smooth skin so as to form a structural surface heat exchanger of preset or left-hand final shape, wherein a fluid is configured to circulate in the channels and air is configured to circulate in contact with the second smooth skin.

A vehicle floor panel is provided in which a honeycomb core made of metal sandwiched and adhered between two CFRP plates is one in which a large number of core units formed into a polygon shape are continuous within one plane so as to share a side of the polygon. Since closed-section parts formed by a hat-shaped cross section part formed along the side and one CFRP plate are continuous with each other at a vertex of the polygon of the adjacent core units, not only is it possible to lighten the weight by opening the interior of the polygon (P) shape core unit, but it is also possible to enhance the energy-absorbing performance by dispersing and transmitting a collision load inputted into one direction of the floor panel toward a plurality of other directions because the high strength load transmission path is continuous with other load transmission paths.

A vehicle floor panel is provided in which a honeycomb core made of metal sandwiched and adhered between two CFRP plates is one in which a large number of core units formed into a polygon shape are continuous within one plane so as to share a side of the polygon. Since closed-section parts formed by a hat-shaped cross section part formed along the side and one CFRP plate are continuous with each other at a vertex of the polygon of the adjacent core units, not only is it possible to lighten the weight by opening the interior of the polygon (P) shape core unit, but it is also possible to enhance the energy-absorbing performance by dispersing and transmitting a collision load inputted into one direction of the floor panel toward a plurality of other directions because the high strength load transmission path is continuous with other load transmission paths.

A metallic structure includes a metallic sheet, including a metallic-sheet first surface and a metallic-sheet second surface. The metallic structure includes a metallic doubler, extending from the metallic-sheet first surface, and a first junction between the metallic-sheet first surface and the metallic doubler. The metallic structure includes a metallic article, extending from the metallic-sheet second surface, and a second junction between the metallic-sheet second surface and the metallic article. The first junction has a first-junction boundary. The second junction has a second-junction boundary. When viewed at any point along the second-junction boundary in a direction, perpendicular to the metallic-sheet first surface, the second-junction boundary does not extend outside of the first-junction boundary. In a plane, intersecting the metallic doubler and perpendicular to the metallic-sheet first surface, the metallic doubler has at least a first doubler thickness and a second doubler thickness, which is less than the first doubler thickness.

Disclosed are flexible honeycomb structure and manufacturing method for the flexible honeycomb structure, the flexible honeycomb structure including a plurality of core lattice units, wherein each of the plurality of core lattice units is of a polygonal structure, and the plurality of core lattice units combine with each other to form the flexible honeycomb structure; and each of the plurality of core lattice units is of an inclined structure, two adjacent core lattice units in a first direction have opposite directions of inclination, two adjacent core lattice units in a second direction have a same direction of inclination, and the first direction is perpendicular to the second direction. By an adoption of technical solutions of the disclosure, a problem of a honeycomb structure and a composite material having the honeycomb structure generating a saddle shape during a bending process is solved, and a manufacturing cost for eliminating the saddle shape is reduced.

A spacer structure for a sandwich construction, formed from a material web which is provided with a plurality of cuts and which has a material web plane as a first plane, wherein, by forming the material web, at least one support platform is formed in portions which is spaced at a distance from the first plane and is arranged in a second plane. Spacing elements run along a direction of extent (Ε) from the first plane into the second plane in the transition zone from the first plane into the second plane and thus the spacing elements space the first plane apart from the support platform, the spacing elements having a twist about the direction of extent thereof along the direction of extent thereof (Ε), the twist being formed by the shaping of the material web being performed as bending.

A technique for improving durability of a frame is provided. A method for manufacturing a honeycomb structure from a triangular hollow pipe composed of a first flat plate, a second flat plate, and a third flat plate includes forming a first slit in the hollow pipe so as to cut all the flat plates except the first plate and forming a second slit in the hollow pipe at a position different from a position of the first slit position in a longitudinal direction of the hollow pipe so as to cut all the flat plates except the second flat plate and folding back the first plate at the first slit position and folding back the second flat plate at the position of the second slit position.

To provide an impact absorbing member that can be arranged flexibly in accordance with the shape of the space where the impact absorbing member is to be arranged. An impact absorbing member according to an exemplary aspect has a plurality of structural members each having hollow tetrahedron structures arranged continuously at prescribed intervals on an axis. Further, an impact absorbing member according to another exemplary aspect has a plurality of structural members woven by a connecting member that is disposed in a direction orthogonal to an axial direction of the structural members.