CN104897392A - Auricle loaded test method and loading system - Google Patents
Auricle loaded test method and loading system Download PDFInfo
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- CN104897392A CN104897392A CN201510350447.6A CN201510350447A CN104897392A CN 104897392 A CN104897392 A CN 104897392A CN 201510350447 A CN201510350447 A CN 201510350447A CN 104897392 A CN104897392 A CN 104897392A
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- 238000010998 test method Methods 0.000 title claims abstract description 23
- 238000005452 bending Methods 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 210000005069 ears Anatomy 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 102100023170 Nuclear receptor subfamily 1 group D member 1 Human genes 0.000 description 2
- RRLHMJHRFMHVNM-BQVXCWBNSA-N [(2s,3r,6r)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-2-methyl-3,6-dihydro-2h-pyran-3-yl] acetate Chemical compound C1=C[C@@H](OC(C)=O)[C@H](C)O[C@H]1OCCCCCOC1=CC(O)=C2C(=O)C(C=3C=CC(O)=CC=3)=COC2=C1 RRLHMJHRFMHVNM-BQVXCWBNSA-N 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an auricle loaded test method and a loading system. The auricle loaded test method comprises the steps of: 1, clamping the other end of an auricle through a clamp; 2, determining a test bending moment needed by an examine position; 3, and simultaneously carrying out the following steps of applying a first load to the clamp, applying a second load to the examine position of the auricle, enabling the auricle to bear the bending moment perpendicular to one surface of the auricle itself, determining the value of the second load through formulas, applying a third load to the clamp, and enabling the second load and the third load to act at the same time so as to provide the test bending moment needed by the examine position of the auricle. By adopting the method provided by the invention, the test bending moment needed by the examine position of the auricle and a tension load provided by the first load are given at the same time, and the force bearing condition of the auricle is simulated accurately.
Description
Technical Field
The invention relates to the technical field of airplanes, in particular to a lug loading test method and a loading system.
Background
Aircraft tabs are subjected to complex forces, typically forces and moments in multiple directions.
In the prior art, forces and moments have an influence on the force distribution, failure mode and bearing capacity of the tabs of the aircraft. In the prior art, the actual loading condition of the ear is difficult to accurately simulate only force or moment is exerted independently.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
It is an object of the present invention to provide a method of ear loading testing that overcomes or at least alleviates at least one of the above-mentioned disadvantages of the prior art.
In order to achieve the above object, the present invention provides an ear loading test method, including:
step 1: one end of the lug plate 1 is fixedly arranged on the bearing wall 2, and the other end of the lug plate 1 is clamped by a clamp 3;
step 2: determining a test bending moment to be applied to an examination part according to test requirements, and acquiring the distance from one end of the lug 1 fixedly arranged on the bearing wall 2 to the other end;
and step 3: simultaneously carrying out:
applying a first load on the clamp 3, wherein the first load gives the lug plate 1 a force which is along the axial direction of the lug plate 1 and enables the lug plate 1 to be far away from the bearing wall 2, and determining the distance between the position where the first load is applied on the clamp 3 and the position where the lug plate 1 is fixedly arranged on the bearing wall 2;
applying a second load at the position of the assessment part 4 of the lug, so that the lug 1 is subjected to a bending moment vertical to one surface of the lug, and determining the numerical value of the second load through a formula;
applying a third load on the clamp 3 to enable the lug plate 1 to be subjected to a load opposite to the direction of the second load, and determining the value of the third load through a formula according to the position relation between the application position of the third load and the application of the second load and the value of the second load;
the second load and the third load are acted together, so that the test bending moment required by the appraised part of the ear 1 can be given.
Preferably, the value of the second load is determined by the following formula:
P2is a second load; m0Testing bending moment; l is3The lug is fixedly arranged at the distance from one end of the bearing wall to the other end; l is2The distance from the position where the first load is applied to one end of the lug plate fixed on the bearing wall.
Preferably, the method for specifically determining the size of the third load includes the following steps:
the second load is a unit load, and the displacement of the check part when the lug is singly subjected to the unit load is recorded2；
Randomly selecting the position of the third load applied on the clamp, enabling the third load to be a unit load, and obtaining the displacement of the assessment part when the third load is applied independently3；
Determining a value of the third load according to the following equation:
P3is a third load value;2the displacement of the assessment part when the second load is a unit load;3displacement of the examined part when the third load is a unit load3；P2Is the value of the first load.
Preferably, the distance L from the position where the first load is applied to one end of the lug plate fixed on the bearing wall is set2The distance L from one end of the lug to the other end of the bearing wall is 1.5 times of the distance L3。
Preferably, the tab load test method is applicable to tabs on aircraft that are subject to in-plane forces as well as out-of-plane bending moments.
The present invention also provides a loading system for the ear loading test method as described above, the loading system comprising: the bearing wall is used for fixing one end of the lug; the clamp is used for fixing the other end of the lug plate; a first ram connected to the clamp, the first ram being adapted to apply a first load to the clamp; the second actuating cylinder is connected with the clamp and is used for applying a second load to the position of the check part of the clamp; and the third actuating cylinder is connected with the clamp and is used for applying a third load to the clamp.
Preferably, the distance from the joint of the first actuator cylinder and the clamp to the end of the lug far away from the first actuator cylinder is equal to 1.5 times of the distance from the end of the lug arranged on the bearing wall to the assessment part.
The ear loading test method simultaneously applies the first load, the second load and the third load, so that the second load and the third load act together, and the test bending moment required by the examined part of the ear and the tensile load given by the first load can be simultaneously given. The stress condition of the ear is accurately simulated, and a foundation is provided for further ear tests. And the ear loading test method is simple and convenient to apply.
Drawings
FIG. 1 is a force diagram of loading a tab using a tab loading test method according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a loading system according to an embodiment of the present invention.
Reference numerals:
| 1 | ear piece | 5 | First actuating cylinder |
| 2 | Bearing wall | 6 | Second actuating cylinder |
| 3 | Clamp apparatus | 7 | Third actuating cylinder |
| 4 | Examination part |
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
FIG. 1 is a force diagram of loading a tab using a tab loading test method according to an embodiment of the invention.
As shown in fig. 1, the ear loading test method of the present invention comprises:
step 1: one end of the lug plate 1 is fixedly arranged on the bearing wall 2, and the other end of the lug plate 1 is clamped by a clamp 3;
step 2: determining a test bending moment to be applied to an examination part according to test requirements, and acquiring the distance from one end of the lug 1 fixedly arranged on the bearing wall 2 to the other end; it can be understood that the distance from one end of the force bearing wall 2 to the other end of the lug 1 is L in the figure2This value can be obtained by measurement.
And step 3: simultaneously carrying out:
applying a first load on the clamp 3, wherein the first load gives the lug plate 1 a force which is along the axial direction of the lug plate 1 and enables the lug plate 1 to be far away from the bearing wall 2, and determining the distance between the position where the first load is applied on the clamp 3 and the position where the lug plate 1 is fixedly arranged on the bearing wall 2;
in the embodiment, the distance between the position where the first load is applied on the clamp 3 and the position where the lug 1 is fixedly arranged on the bearing wall 2 is L in FIG. 13。
Applying a second load at the position of the assessment part 4 of the lug, so that the lug 1 is subjected to a bending moment vertical to one surface of the lug, and determining the numerical value of the second load through a formula;
in the present embodiment, the value of the second load is determined by the following formula:
M0the test bending moment in the step 2 is adopted; l is3(L shown in FIG. 1)3) The lug is fixedly arranged at the distance from one end of the bearing wall to the other end; l is2(L shown in FIG. 22) The distance from the position where the first load is applied to one end of the lug plate fixed on the bearing wall.
Applying a third load on the clamp 3 to enable the lug plate 1 to be subjected to a load opposite to the direction of the second load, and determining the value of the third load according to the position relation between the application position of the third load and the application of the second load and the value of the second load by a formula; specifically, the method for specifically determining the size of the third load includes the following steps:
the second load is a unit load, and the displacement of the appraisal part 4 when the lug 1 is singly subjected to the unit load is recorded2；
Randomly selecting the position of the third load applied on the clamp 3, enabling the third load to be a unit load, and obtaining the displacement of the examination part 4 when the third load is applied independently3；
Determining a value of the third load according to the following equation:
P3is a third load value;2the displacement of the assessment part when the second load is a unit load;3checking part when the third load is unit loadDisplacement of (2)3；P2Is the value of the first load.
It is understood that the unit load is set to 1N/m, and the first load and the second load are applied at different positions, resulting in that2And3the difference in (c). Namely, the different positions of the load and the displacement of the checking part have a mutual corresponding relation.
The second load and the third load act together, so that the required test bending moment can be given to the checking part of the ear 1.
The ear loading test method simultaneously applies the first load, the second load and the third load, so that the second load and the third load act together, and the test bending moment required by the examined part of the ear and the tensile load given by the first load can be simultaneously given. The stress condition of the ear is accurately simulated, and a foundation is provided for further ear tests. And the ear loading test method is simple and convenient to apply.
Referring to fig. 1, in the present embodiment, the distance L from the position where the first load is applied to the end of the tab 1 fixed to the messenger wall 2 is set2The lug piece which is 1.5 times of the lug piece is fixedly arranged at the distance L from one end to the other end of the bearing wall 23. With this structure, determination of the numerical values of the second load and the third load is facilitated.
Advantageously, the tab load test method is applicable to tabs on aircraft that are subject to in-plane forces as well as out-of-plane bending moments.
The invention also provides a loading system which comprises a bearing wall 2, a clamp 3, a first actuating cylinder 5, a second actuating cylinder 6 and a third actuating cylinder 7, wherein the bearing wall 2 is used for fixing one end of the lug plate 1; the clamp 3 is used for fixing the other end of the lug plate 1; a first actuator cylinder 5 connected to the clamp 3, the first actuator cylinder 5 being adapted to apply a first load to the clamp; the second actuating cylinder 6 is connected with the clamp 3, and the second actuating cylinder 6 is used for applying a second load to the position of the checking part 4 of the clamp 3; the third actuating cylinder 7 is connected to the clamp 3, and the third actuating cylinder 7 is used to apply a third load to the clamp 3.
Advantageously, the distance from the connection of the first ram 5 to the clamp 3 to the end of the tab 1 remote from the first ram 5 is equal to 1.5 times the distance from the end of the tab 1 disposed on the support wall 2 to the assessment site 4.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. An ear loading test method, comprising:
step 1: one end of the lug plate (1) is fixedly arranged on the bearing wall (2), and the other end of the lug plate (1) is clamped by a clamp (3);
step 2: determining a test bending moment to be applied to an examination part according to test requirements, and acquiring the distance from one end of the lug (1) fixedly arranged on the bearing wall (2) to the other end;
and step 3: simultaneously carrying out:
applying a first load on the clamp (3) which imparts to said tab (1) a force in the axial direction of said tab (1) which moves said tab (1) away from the load-bearing wall (2), determining the distance between the location at which said first load is applied on said clamp (3) and the location at which said tab (1) is fixedly disposed on the load-bearing wall (2);
applying a second load at the position of the assessment part (4) of the lug, so that the lug (1) is subjected to a bending moment vertical to one surface of the lug, and determining the value of the second load through a formula;
applying a third load on the clamp (3), enabling the lug (1) to be subjected to a load opposite to the direction of the second load, and determining the value of the third load through a formula according to the position relation between the application position of the third load and the application of the second load and the value of the second load;
the second load and the third load are enabled to act together, so that the required test bending moment can be given to the checking part of the ear (1).
2. The ear loading test method of claim 1, wherein the value of the second load is determined by the following equation:
P2is a second load; m0Testing bending moment; l is3The lug is fixedly arranged at the distance from one end of the bearing wall to the other end; l is2The distance from the position where the first load is applied to one end of the lug plate fixed on the bearing wall.
3. The ear loading test method of claim 2, wherein the third loading is specifically determined by a method comprising the steps of:
the second load is used as a unit load, and the displacement of the appraisal part (4) when the lug (1) is singly subjected to the unit load is recorded2；
Randomly selecting the position of the third load applied on the clamp (3), enabling the third load to be a unit load, and obtaining the displacement of the assessment part (4) when the third load is applied independently3；
Determining a value of the third load according to the following equation:
P3is a third load value;2the displacement of the assessment part when the second load is a unit load;3displacement of the examined part when the third load is a unit load3；P2Is the value of the first load.
4. The tab load test method according to claim 2, wherein the distance L from the position where the first load is applied to the end of the tab (1) fixed to the catenary wall (2) is set2The lug is fixedly arranged at the distance L from one end to the other end of the bearing wall (2) which is equal to 1.5 times3。
5. The ear loading test method according to claims 1 to 4, wherein the ear loading test method is suitable for ears on aircraft that are subject to in-plane forces as well as out-of-plane bending moments.
6. A loading system for the ear loading test method according to any one of claims 1 to 5, characterized in that it comprises:
the bearing wall (2), the bearing wall (2) is used for fixing one end of the lug (1);
the clamp (3) is used for fixing the other end of the lug plate (1);
a first ram (5), said first ram (5) being connected to said clamp (3), said first ram (5) being adapted to apply a first load to said clamp;
a second ram (6), the second ram (6) being connected to the clamp (3), the second ram (6) being adapted to apply a second load to the clamp (3) at the location of the assessment site (4);
a third actuating cylinder (7), the third actuating cylinder (7) being connected to the clamp (3), the third actuating cylinder (7) being configured to apply a third load to the clamp (3).
7. The loading system according to claim 6, wherein the distance from the connection of the first ram (5) with the clamp (3) to the end of the tab (1) remote from the first ram (5) is equal to 1.5 times the distance from the end of the tab (1) disposed on the messenger wall (2) to the assessment site (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510350447.6A CN104897392B (en) | 2015-06-23 | 2015-06-23 | A kind of auricle stand under load test method and loading system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510350447.6A CN104897392B (en) | 2015-06-23 | 2015-06-23 | A kind of auricle stand under load test method and loading system |
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| CN104897392A true CN104897392A (en) | 2015-09-09 |
| CN104897392B CN104897392B (en) | 2018-10-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366074A (en) * | 2015-11-25 | 2016-03-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Load applying method for three-degrees-of-freedom single-lug lug piece |
| CN110712763A (en) * | 2019-10-12 | 2020-01-21 | 哈尔滨飞机工业集团有限责任公司 | Single-spar crack propagation test device and test method |
| CN110954317A (en) * | 2019-12-25 | 2020-04-03 | 中国航空工业集团公司西安飞机设计研究所 | Loading method of joint bearing multi-directional load |
| CN112213088A (en) * | 2020-09-22 | 2021-01-12 | 上海航天精密机械研究所 | Cabin structure compression-shear coupling load test device |
| CN112591135A (en) * | 2020-11-03 | 2021-04-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft static test load loading method |
| CN113820115A (en) * | 2021-09-24 | 2021-12-21 | 无锡威孚力达催化净化器有限责任公司 | Double-shaft lifting lug fatigue performance testing device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105366074A (en) * | 2015-11-25 | 2016-03-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Load applying method for three-degrees-of-freedom single-lug lug piece |
| CN105366074B (en) * | 2015-11-25 | 2018-10-09 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of monaural auricle load applying method with triple motion degree of freedom |
| CN110712763A (en) * | 2019-10-12 | 2020-01-21 | 哈尔滨飞机工业集团有限责任公司 | Single-spar crack propagation test device and test method |
| CN110954317A (en) * | 2019-12-25 | 2020-04-03 | 中国航空工业集团公司西安飞机设计研究所 | Loading method of joint bearing multi-directional load |
| CN110954317B (en) * | 2019-12-25 | 2022-02-08 | 中国航空工业集团公司西安飞机设计研究所 | Loading method of joint bearing multi-directional load |
| CN112213088A (en) * | 2020-09-22 | 2021-01-12 | 上海航天精密机械研究所 | Cabin structure compression-shear coupling load test device |
| CN112591135A (en) * | 2020-11-03 | 2021-04-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Aircraft static test load loading method |
| CN113820115A (en) * | 2021-09-24 | 2021-12-21 | 无锡威孚力达催化净化器有限责任公司 | Double-shaft lifting lug fatigue performance testing device |
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| CN104897392B (en) | 2018-10-09 |
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