CN204527608U - A kind of anti-bird hits energy-absorbing sandwich structure - Google Patents
A kind of anti-bird hits energy-absorbing sandwich structure Download PDFInfo
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- CN204527608U CN204527608U CN201520145899.6U CN201520145899U CN204527608U CN 204527608 U CN204527608 U CN 204527608U CN 201520145899 U CN201520145899 U CN 201520145899U CN 204527608 U CN204527608 U CN 204527608U
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Abstract
The utility model relates to helicopter skining structure, and particularly the anti-bird of one hits energy-absorbing sandwich structure.Honeycomb (3) is made up of rectangle honeycomb and trapezoidal honeycomb, two trapezoidal honeycombs are positioned at both sides, middle by the arrangement of falling triangle disposition of three pieces of rectangle honeycomb journeys, elastic layer (2) journey " several " font is wrapped on honeycomb, cemented together with honeycomb, top panel (1) and lower faceplate (4) cover on elastic layer (2) and honeycomb (3).This technical scheme, under the prerequisite not increasing structural weight, enhances the intensity of covering, improves energy-absorbing effect, reduces bird body bump stroke, makes structure meet anti-bird and hit requirement.
Description
Technical field
The utility model relates to helicopter skining structure, and particularly the anti-bird of a kind of helicopter vertical fin skins front edges hits honeycomb sandwich construction.
Background technology
Meet anti-bird for making helicopter vertical fin leading edge structure and hit requirement, the vertical fin skins front edges structure of existing type designs for honeycomb sandwich construction, namely between two laminate, presss from both sides one deck honeycomb.This structure is because laminate thickness is thin, intensity is weak, and after suffering bird strike, ply wood and honeycomb are directly damaged, and effectively can not cushion bird impact load, energy-absorbing effect is bad, and bird impact resistance is poor.
Summary of the invention
The technical problem to be solved in the present invention: develop a kind of novel anti-bird and hit energy-absorbing honeycomb interlayer stressed-skin construction, under the prerequisite not increasing structural weight, strengthens covering intensity, improves energy-absorbing effect, reduces bird body bump stroke, makes structure meet anti-bird and hit requirement.
Technical scheme of the present invention: a kind of anti-bird hits energy-absorbing sandwich structure, be made up of top panel 1, lower faceplate 4, elastic layer 2 and honeycomb 3, it is characterized by: honeycomb 3 is made up of rectangle honeycomb and trapezoidal honeycomb, two trapezoidal honeycombs are positioned at both sides, middle is the arrangement of falling triangle disposition by three pieces of rectangle honeycombs, elastic layer 2 is wrapped on honeycomb in falling " several " font, and cemented together with honeycomb, top panel 1 and lower faceplate 4 cover on elastic layer 2 and honeycomb 3.
One as the technical program is improved, the width of falling triangle disposition of three pieces of rectangle honeycomb compositions is 70mm, the height of every block rectangle honeycomb is 5mm, the upper base width of trapezoidal honeycomb is 15mm, width of going to the bottom is 30mm, highly for 15mm, the gap of the two pieces of rectangle honeycombs fallen in triangle disposition is 2mm, and the gap between trapezoidal honeycomb and the honeycomb of falling triangle disposition is 5mm.
One as the technical program is improved, and elastic layer is pasted by S-FDC88 material and forms.
Beneficial effect of the present invention: after stressed-skin construction suffers birdstrike, bird body impact is calculated by theorem of impulse.F=mv/t, from formula, upon impact, t is less, and impact is larger, and t is larger, then impact is less.Therefore, collision time length determines the size of impact.Fall the elastic layer of "Ji" type in having in energy-absorbing stressed-skin construction, be subject to after bird body clashes into, elastic layer is because intensity is high, good springiness can not destroy immediately, and elastic layer is by the arc of " several " font flare up net bag-shaped of complications.Elastic layer is out of shape the process opened makes collision time lengthen, and impact is just little than not having the covering impact of elastic layer.
After elastic layer opens the arc in net bag-shaped; bump stroke is distributed on arcwall face; elastic layer due to intensity high; before himself destroys; can impact be distributed on the fixed sturcture on both sides; greatly cushion the shock effect of exotic, structure energy-absorbing and buffer action are strengthened, thus plays the effect of protection inner structure.Can not the opening of influence elastane layer in falling the honeycomb of " product " font arrangement, but endergonic effect can be played.Elastic layer adds the effect that the buffer air bag on the similar automobile of mass action of honeycomb plays, and therefore energy-absorbing stressed-skin construction improves the bird impact resistance of stressed-skin construction.
Accompanying drawing explanation
Fig. 1 is energy-absorbing sandwich structure schematic diagram;
In figure: 1 is top panel, 2 is elastic layer, and 3 is honeycomb, 4 lower faceplates.
Detailed description of the invention
Being described in detail as follows with reference to the accompanying drawings to structure:
This anti-bird is hit energy-absorbing stressed-skin construction and is made up of top panel 1, lower faceplate 4, elastic layer 2 and honeycomb 3, wherein honeycomb 3 is made up of rectangle honeycomb and trapezoidal honeycomb, two trapezoidal honeycombs are positioned at both sides, middle is the arrangement of falling triangle disposition by three pieces of rectangle honeycombs, elastic layer 2 is wrapped on honeycomb in falling " several " font, cemented together with honeycomb, top panel 1 and lower faceplate 4 cover on elastic layer 2 and honeycomb 3.Wherein the width of falling triangle disposition of three pieces of rectangle honeycomb compositions is preferably 70mm, the height of every block rectangle honeycomb is preferably 5mm, the upper base width of trapezoidal honeycomb is preferably 15mm, width of going to the bottom is preferably 30mm, is highly preferably 15mm, the gap of the two pieces of rectangle honeycombs fallen in triangle disposition is preferably 2mm, and the gap between trapezoidal honeycomb and the honeycomb of falling triangle disposition is preferably 5mm.
When birdstrike is in sandwich structure, elastic layer opens by " several " font of complications the arc being deformed into net bag-shaped, and elastic layer is out of shape the increased periods opened collision time, just serves the effect reducing impact.On the other hand; after elastic layer opens the arc in net bag-shaped; bump stroke is distributed on arcwall face; elastic layer due to intensity high; before himself destroys, can impact be distributed on the fixed sturcture on both sides, greatly cushion the shock effect of exotic; structure energy-absorbing and buffer action are strengthened, thus plays the effect of protection inner structure.
Claims (3)
1. an anti-bird hits energy-absorbing sandwich structure, be made up of top panel (1), lower faceplate (4), elastic layer (2) and honeycomb (3), it is characterized by: honeycomb (3) is made up of rectangle honeycomb and trapezoidal honeycomb, two trapezoidal honeycombs are positioned at both sides, middle by the arrangement of falling triangle disposition of three pieces of rectangle honeycomb journeys, elastic layer (2) journey " several " font is wrapped on honeycomb, cemented together with honeycomb, top panel (1) and lower faceplate (4) cover on elastic layer (2) and honeycomb (3).
2. anti-bird according to claim 1 hits energy-absorbing sandwich structure, it is characterized by: the width of falling triangle disposition of three pieces of rectangle honeycomb compositions is 70mm, the height of every block rectangle honeycomb is 5mm, the upper base width of trapezoidal honeycomb is 15mm, width of going to the bottom is 30mm, highly for 15mm, the gap of the two pieces of rectangle honeycombs fallen in triangle disposition is 2mm, and the gap between trapezoidal honeycomb and the honeycomb of falling triangle disposition is 5mm.
3. anti-bird according to claim 1 and 2 hits energy-absorbing sandwich structure, it is characterized by: elastic layer is pasted by S-FDC88 material and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520145899.6U CN204527608U (en) | 2015-03-13 | 2015-03-13 | A kind of anti-bird hits energy-absorbing sandwich structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520145899.6U CN204527608U (en) | 2015-03-13 | 2015-03-13 | A kind of anti-bird hits energy-absorbing sandwich structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204527608U true CN204527608U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520145899.6U Active CN204527608U (en) | 2015-03-13 | 2015-03-13 | A kind of anti-bird hits energy-absorbing sandwich structure |
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| CN (1) | CN204527608U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273849A (en) * | 2017-07-18 | 2019-01-25 | 中国航空工业集团公司济南特种结构研究所 | A kind of honeycomb reinforces radar cover structure self |
| CN112628195A (en) * | 2019-10-09 | 2021-04-09 | 中国航发商用航空发动机有限责任公司 | Fan blade and aeroengine |
| CN114084358A (en) * | 2021-12-28 | 2022-02-25 | 中国航空工业集团公司西安飞机设计研究所 | Bird collision resisting structure of airplane |
-
2015
- 2015-03-13 CN CN201520145899.6U patent/CN204527608U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109273849A (en) * | 2017-07-18 | 2019-01-25 | 中国航空工业集团公司济南特种结构研究所 | A kind of honeycomb reinforces radar cover structure self |
| CN112628195A (en) * | 2019-10-09 | 2021-04-09 | 中国航发商用航空发动机有限责任公司 | Fan blade and aeroengine |
| CN114084358A (en) * | 2021-12-28 | 2022-02-25 | 中国航空工业集团公司西安飞机设计研究所 | Bird collision resisting structure of airplane |
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