CN109612697A - A kind of distribution pressure water load test loading method - Google Patents
A kind of distribution pressure water load test loading method Download PDFInfo
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- CN109612697A CN109612697A CN201811493780.2A CN201811493780A CN109612697A CN 109612697 A CN109612697 A CN 109612697A CN 201811493780 A CN201811493780 A CN 201811493780A CN 109612697 A CN109612697 A CN 109612697A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention discloses a kind of distribution pressure water loads to test loading method, can be carried out efficiently the test that the complex-curved body structure surface distribution pressure water load of seaplane applies, and with the Intensity Design of verification experimental verification fuselage bottom structure and carries out intensive analysis.The test loading method have the advantages that the features such as structure type is simple, Path of Force Transfer is clear, loading accuracy and stability are high, empirical risk is controllable and, can satisfy test demand.The Pneumatic pressure load that this method can be also widely applied to other complex-curved body structure surfaces simultaneously applies.
Description
Technical field
The present invention relates to test load domains, and in particular to a kind of distribution pressure water load test loading method.
Background technique
Seaplane will receive the reaction force of the water surface, referred to as water load in water surface takeoff and landing.According to China
Civil aviation regulations (portion CCAR25) requirement, seaplane water load should be distributed on the Area of Wetted Surface of hull bottom, and necessary
Consider the influence of its position and distribution.Test and use experience show that the water load for acting on hull bottom should be to be distributed pressure
The form of power applies.
Air bag can be paid the utmost attention to mostly and is filled when considering that complex-curved pressure loading applies according to previous test experience
Press loading method.However this method test implement when it is possible that gas leakage, fixture and testpieces Anawgy accuracy require height, close
It is big to seal difficulty, the release of balloon surface tension causes pressure loading to apply inaccuracy, the even problems such as air bag explosion.Especially exist
After generating apparent rigid body displacement and deformation after testpieces is loaded, the above problem can become abnormal prominent, security risk occur.And
When the pressure loading of required application is excessive (more than 1 atmospheric pressure), the loads fixture of fixation balloon is very heavy.
In aircraft structure strength test, due to hull bottom water load scope surface details are complicated, load-carrying area is big,
The features such as load total amount is big, load needs uniformly continuous to apply, accurately applying distribution pressure water load in hull bottom, there are all
More technological difficulties.
Summary of the invention
Goal of the invention
The purpose of the present invention is: propose that one kind can efficiently solve the complex-curved body structure surface distribution pressure of seaplane
The test method that water load applies is with the Intensity Design of verification experimental verification fuselage bottom structure and carries out intensive analysis.Test load
Method has the characteristics that structure type is simple, Path of Force Transfer is clear, loading accuracy and stability are high, empirical risk is controllable and excellent
Point can satisfy test demand.This method can be also widely applied to the Pneumatic pressure load of other complex-curved body structure surfaces simultaneously
Apply.
Inventive technique solution
In order to achieve the above-mentioned object of the invention, the present invention uses following technical solutions:
A kind of distribution pressure water load test loading method, includes the following steps: step 1: determining water load scope
Actual loaded region is simultaneously smoothed loading area surface；Step 2: according to the distribution situation of water load, using power
The radial subregion load of curved-surface structure is carried out the synthesis of power, calculates Resultant force position and size by vector composite analysis, and
Gridding subregion is carried out to numerical control repairing type die surface, rigidity load node is arranged, carries out discretization load distribution；Step 3: carrying
After lotus is assigned, load merging is carried out to gridding subregion using lever principle.
Preferably, loading area surface is smoothed using coating or soft scrim material in step 1, solves knot
Structure surface is intensively dashed forward the rough and uneven in surface problem such as nail, covering overlap joint, gap, lid, band, so as to numerical control repairing type mold surface energy
It enough fittings closely and is played in load and prevents testpieces surface damage, realize the purpose of protection test part.
Preferably, discretization load distribution method is as follows in step 2: only consider according to main loading direction parallel force system into
The processing of row uniform discrete；For the further subregion of local curvature's change of gradient large area, part is more subtly considered
Loading direction；For the zone of action that Curvature varying is more gentle, the load list of large area can be directly established by a subzone
Member.
Preferably, single loading area is established with main load after being smoothed in step 1 to loading area surface
Direction is the load underlying structure model of normal direction, and load is applied to indirectly in load underlying structure when test.
Preferably, load underlying structure is used using timber, polyurethane or rubber etc. convenient for numerical control repairing type or the material of mold
Matter.
Preferably, the discrete load node of rigidity is evenly arranged on underlying structure surface.
Preferably, rigid discrete nodes are connected using lever system.
Advantages of the present invention
The present invention has the advantages that
(1) efficiently solve the problems, such as that the complex-curved distribution pressure water load of hull bottom structure large area applies；With gas
Capsule loading method is compared, this method Path of Force Transfer clear and definite, and it is accurate that load applies, and ballast stability is high, and test reliability is high,
Security risk is controllable；
(2) for loading area after surface treatment, numerical control repairing type mold and complex-curved adaptability are good, and fitting is close,
It ensure that the uniform, continuous of water load, while being also effectively protected surface of test piece.
Specific embodiment
It is summarized in conjunction with summary of the invention, the specific embodiment that the present invention will be described in detail.
A kind of distribution pressure water load test loading method, includes the following steps:
Step 1: determining that the actual loaded region of water load scope, seaplane hull bottom structure surface exist a large amount of
The CONSTRUCTED SPECIFICATIONs such as complicated quadratic surface, covering overlap joint, detachable lid, close-packed lattice arrangement manufactured head, sealing, in addition consider
The complexity and boundary demarcation in water load region need to use at coating or soft scrim material examination regional structure surface
Reason is to eliminate the rough and uneven in surface and gap at local detail, convenient for design load mold.According to the distribution situation behind payload partitions,
Single loading area is established using main loading direction as the load underlying structure model of normal direction, when test allows load to apply indirectly
It is added in underlying structure.Underlying structure can select timber, polyurethane, rubber etc. convenient for numerical control repairing type or the material of mold.
Step 2: according to the distribution situation of water load, using the vector composite analysis of power, by radial point of curved-surface structure
Area's load carries out the synthesis of power, calculates Resultant force position and size, and carry out gridding subregion to numerical control repairing type die surface,
Arrangement rigidity load node, carries out discretization load distribution；About the discretization of load, can only consider according to main loading direction
Parallel force system carry out uniform discrete processing.In view of the situation that local curvature's change of gradient is larger, can further subregion,
More subtly consider local loading direction.For hull bottom distribution pressure water load, zone of action Curvature varying is more
Gently, the loading unit of large area can directly be established by a subzone.It is discrete that rigidity is evenly arranged in underlying structure layer surface
Load node.Rigid discrete nodes are connected using lever system.
Step 3: after the completion of load distribution, load merging being carried out to gridding subregion using lever principle.
Claims (8)
1. a kind of distribution pressure water load tests loading method, which comprises the steps of:
Step 1: determining the actual loaded region of water load scope and loading area surface is smoothed；
Step 2: being carried the radial subregion of curved-surface structure using the vector composite analysis of power according to the distribution situation of water load
Lotus carries out the synthesis of power, calculates Resultant force position and size, and carry out gridding subregion, arrangement to numerical control repairing type die surface
Rigidity load node, carries out discretization load distribution；
Step 3: after the completion of load distribution, load merging being carried out to gridding subregion using lever principle.
2. a kind of distribution pressure water load as described in claim 1 tests loading method, which is characterized in that used in step 1
Coating or soft scrim material are smoothed loading area surface.
3. a kind of distribution pressure water load as described in claim 1 tests loading method, which is characterized in that discrete in step 2
It is as follows to change load distribution method: only considering to carry out uniform discrete processing according to the parallel force system of main loading direction；For part
Curvature gradients change greatly the further subregion in region, more subtly consider local loading direction；More for Curvature varying
The gentle zone of action can directly establish the loading unit of large area by a subzone.
4. a kind of distribution pressure water load as described in claim 1 tests loading method, which is characterized in that adding in step 1
It carries after region surface is smoothed and single loading area is established using main loading direction as the load substrate knot of normal direction
Structure model, load is applied to indirectly in load underlying structure when test.
5. a kind of distribution pressure water load as claimed in claim 4 tests loading method, which is characterized in that load underlying structure
Using the material convenient for numerical control repairing type or mold.
6. a kind of distribution pressure water load as claimed in claim 4 tests loading method, which is characterized in that in underlying structure table
Face is evenly arranged the discrete load node of rigidity.
7. a kind of distribution pressure water load as claimed in claim 6 tests loading method, which is characterized in that use lever system
Connect rigid discrete nodes.
8. a kind of distribution pressure water load as claimed in claim 5 tests loading method, which is characterized in that load underlying structure
Using timber, polyurethane or rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811493780.2A CN109612697B (en) | 2018-12-07 | 2018-12-07 | Distributed pressure water load test loading method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811493780.2A CN109612697B (en) | 2018-12-07 | 2018-12-07 | Distributed pressure water load test loading method |
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| CN109612697A true CN109612697A (en) | 2019-04-12 |
| CN109612697B CN109612697B (en) | 2020-06-30 |
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| CN201811493780.2A Active CN109612697B (en) | 2018-12-07 | 2018-12-07 | Distributed pressure water load test loading method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110750890A (en) * | 2019-10-12 | 2020-02-04 | 中航通飞研究院有限公司 | Method for calculating hydrostatic test load of amphibious aircraft |
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| CN101685039A (en) * | 2008-09-23 | 2010-03-31 | 中国农业机械化科学研究院 | Method for testing field ground load calibration of airplane wing and calibration device thereof |
| CN103324778A (en) * | 2013-01-05 | 2013-09-25 | 中国航空工业集团公司西安飞机设计研究所 | Ground load determination method of multi-fulcrum airplane |
| JP6069761B2 (en) * | 2013-03-27 | 2017-02-01 | 基礎地盤コンサルタンツ株式会社 | Penetration type lateral loading test method and penetration type lateral loading test apparatus |
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| CN104075868A (en) * | 2014-05-30 | 2014-10-01 | 西北工业大学 | Aerodynamic load loading method used for reliability tests on aircraft flap and slat system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110750890A (en) * | 2019-10-12 | 2020-02-04 | 中航通飞研究院有限公司 | Method for calculating hydrostatic test load of amphibious aircraft |
| CN110750890B (en) * | 2019-10-12 | 2023-06-30 | 中航通飞华南飞机工业有限公司 | Load calculation method for hydrostatic test of amphibious aircraft |
Also Published As
| Publication number | Publication date |
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| CN109612697B (en) | 2020-06-30 |
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