Helicopter corrugated beam and design method of corrugated section of corrugated beam
A wave beam and helicopter technology, applied in design optimization/simulation, instrument, geometric CAD, etc., can solve the problems of heavy design structure and weak energy absorption capacity of materials, and achieve the effect of light weight, material saving and good normal stiffness
Active Publication Date: 2020-04-17
CHINA HELICOPTER RES & DEV INST
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Problems solved by technology
However, for the anti-fall impact design of traditional metal structures, the design structure is generally heavy, and because the composite material is a brittle material, the energy absorption capacity of the material itself is relatively weak, and it is difficult to achieve a good energy absorption effect for the general composite material configuration design.
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[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0056] The corrugated beam structure of the present invention is an integral structure of laminated plates such as figure 1 , including upper edge strip 1, corrugated web 2, lower edge strip 3 and filled carbon filament 4. The corrugated web 2 is arranged between the upper edge strip 1 and the lower edge strip 3, and the transition corners between the web 2 and the upper edge strip 1, web 2 and the lower edge strip 3 are filled with polystyrene foam ...
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The invention belongs to the field of aircraft foundation application, and particularly relates to a helicopter corrugated beam and a design method of a corrugated section of the corrugated beam. Theweak link of the composite material corrugated beam structure is designed into a small arc transition form between the two ends of the structure and the flanges, and a layer of composite material is laid around the web by one circle, so that the initial damage of the structure can be ensured from the end part; straight sections can be arranged at intervals of the waveform sections of the waveformbeam and used for equipment installation connectors, three waves form one group of waveform sections, good crushing performance is guaranteed, and high material specific energy absorption capacity isachieved.
Description
technical field [0001] The invention belongs to the application field of aircraft foundations, and in particular relates to a helicopter wave beam and a design method for the corrugated section of the wave beam. Background technique [0002] When a helicopter crashes in an accident, it is necessary to use the anti-crash structure of the fuselage to absorb the crash energy and reduce the peak load during the crash impact, so as to save the lives of the occupants. [0003] In traditional helicopter structures, the metal structure of the lower fuselage is designed for crash impact energy absorption, or simply adopts composite material structural configuration design to achieve the purpose of energy absorption. However, for the anti-fall impact design of traditional metal structures, the design structure is generally heavy, and because the composite material is a brittle material, the energy absorption capacity of the material itself is relatively weak, and it is difficult to ac...
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IPC IPC(8): G06F30/23G06F30/15G06F119/14
Inventor 卢致龙
Owner CHINA HELICOPTER RES & DEV INST