Multi-stage energy absorption helicopter anti-crash bottom cabin structure
An anti-crash and helicopter technology, which is applied in the direction of fuselage bulkhead, fuselage, rotorcraft, etc., can solve the problems that the design of multi-stage energy absorption is not obvious, and the energy absorption effect needs to be improved, so as to achieve the maximum and Stability, energy absorption, and damage reduction effects
Active Publication Date: 2020-12-08
BEIJING JIAOTONG UNIV +1
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Problems solved by technology
Due to the hard points at the joints of thin-walled parts, the energy absorption effect of the bilge structure still needs to be improved, and the design of multi-stage energy absorption is not significant
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[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings. Such as Figure 1 to Figure 4 As shown, a multi-stage energy-absorbing helicopter crash-resistant bilge structure includes a bulkhead 1, and the bulkhead is riveted with a primary honeycomb interlayer skin energy-absorbing module 21 and a secondary multi-directional load-carrying honeycomb energy-absorbing module 22 respectively. , wherein the inner side of the first-level honeycomb sandwich skin energy-absorbing module 21 is provided with a second-level multi-directional load-bearing honeycomb energy-absorbing module 22, and the second-level multi-directional load-bearing honeycomb energy-absorbing module 22 is fixedly connected with a third-level flip cutting energy-absorbing module 23 , the upper end of the three-stage overturned cutting energy-absorbing module 23 is fixedly connected with a five-stage honeycomb sandwich floor energy-absorbing module 26 .
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The invention relates to the technical field of bottom cabin structure design, in particular to a multi-stage energy absorption helicopter anti-crash bottom cabin structure. The multi-stage energy absorption helicopter anti-crash bottom cabin structure comprises a bulkhead, a first-stage honeycomb sandwich skin energy absorption module and a second-stage multi-directional bearing honeycomb energyabsorption module are riveted to the bulkhead, the second-stage multi-directional bearing honeycomb energy absorption module is arranged on the inner side of the first-stage honeycomb sandwich skin energy absorption module, the second-stage multi-directional bearing honeycomb energy absorption module is fixedly connected with a third-stage turnover cutting energy absorption module, and the upper end of the third-stage turnover cutting energy absorption module is fixedly connected with a fifth-stage honeycomb sandwich floor energy absorption module. According to the multi-stage energy absorption helicopter anti-crash bottom cabin structure, on the premise that the total mass and the total rigidity of a bottom cabin are controlled, five-stage absorption is conducted on impact energy in a limited space, maximization and stability of energy absorption are achieved, and damage of the impact energy to a helicopter driver and passengers is reduced.
Description
technical field [0001] The invention relates to the technical field of helicopter bilge structure design, in particular to a multi-stage energy-absorbing helicopter crash-resistant bilge structure. Background technique [0002] Crash resistance means that when a helicopter crashes, it relies on its own deformation to absorb energy to protect the safety of the occupants. Although the level of my country's aviation industry continues to improve, helicopter crashes still occur from time to time. In the event of a crash, the helicopter bilge structure is the most important energy-absorbing component, and its crash-resistant design plays an important role in protecting the safety of the driver and passengers. At present, due to the small space under the floor of the helicopter cabin, it is mainly used to arrange energy-absorbing structures, and thin-walled energy-absorbing components such as thin-walled beams and corrugated beams are mostly used. Due to the hard points at the j...
Claims
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IPC IPC(8): B64C1/10B64C1/22B64C1/00B64C27/04
CPCB64C1/10B64C1/22B64C1/00B64C27/04
Inventor 李志刚李睿刘小川白春玉王亚锋郭亚周王计真
Owner BEIJING JIAOTONG UNIV