CN107084654A - A kind of radome slow test load(ing) point determines method - Google Patents
A kind of radome slow test load(ing) point determines method Download PDFInfo
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- CN107084654A CN107084654A CN201710178647.7A CN201710178647A CN107084654A CN 107084654 A CN107084654 A CN 107084654A CN 201710178647 A CN201710178647 A CN 201710178647A CN 107084654 A CN107084654 A CN 107084654A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
Abstract
Method is determined the present invention relates to a kind of radome slow test load(ing) point, belongs to aircraft test field of measuring technique.4 datum marks of confirmation in plane are connected with fuselage in radome first, two points contacted including the radome plane of symmetry with fuselage, afterwards according to datum mark and the coordinate of load(ing) point, calculate the air line distance of each load(ing) point and datum mark, finally with lengthen compasses rule by the distance of load(ing) point to datum mark on radome surface, same load(ing) point datum mark different from two make an arc line intersection point be this load(ing) point accurate location.The present invention is to load(ing) point accurate positioning, and easy to operate, outfit is more universal.
Description
Technical field
The invention belongs to aircraft test field of measuring technique, and in particular to a kind of radome slow test load(ing) point determination side
Method.
Background technology
Radome the aerodynamic loading loaded for being mainly derived from its surface, slow test verify when generally by outside it
Surface layout a number of load(ing) point simulates its structure stress.Usually it is capable of the structure of more real guinea pig cover
Stress, in the case where experimental condition allows, arranges large number of experiment load(ing) point as far as possible.The quantity of load(ing) point and with
And there are much relations in position distribution and the distributed load size direction of radar cover outer surface, are provided typically by LOAD FOR,
Distribution more disperses.
Radome generally uses many cambered shells of composite, and profile is more complicated, therefore how accurate on testpieces surface
The position for really finding out load(ing) point is always the difficult point for perplexing radome finite element analysis.All the time, the surface of radome adds
Loading point position determines it is the method by tensing thin silk thread on radome surface on the basis of airframe structure.Such a method is only fitted
It is outside one's consideration shape, and is easily slided for the larger radome thin silk thread of curvature on radome surface for single, is asked in this way
The loading Position error gone out is larger.
The content of the invention
The problem of confirming present invention aim to address radome slow test load(ing) point, is allowed to meet slow test loading
Requirement, design a kind of confirmation method of radome slow test load(ing) point, complete slow test.The technology solution party of the present invention
Case includes following several steps：
S1, on the face of the radome outer ring its with confirming four datum marks, described four in airframe contact line
Datum mark includes the plane of symmetry of the radome and two intersection point O of the contact line1、O2, two other datum mark O3、O4Point
Wei Yu not described two intersection point O1、O2The both sides of line；
S2, air line distance of each load(ing) point away from four datum marks is determined, select the load(ing) point away from O1、O2Middle distance
Shorter datum mark, the relatively short distance is d1, the load(ing) point is selected away from O3、O4The shorter datum mark of middle distance, the relatively short distance
For d2；
S3, with the load(ing) point away from O1、O2The shorter datum mark of middle distance is origin, with apart from d1For radius, using compasses
The first camber line is drawn on the radome surface, with the load(ing) point away from O3、O4The shorter datum mark of middle distance is origin, with distance
d2For radius, the second camber line is drawn on the radome surface using the compasses, two camber line intersection points of mark are the loading
Point position.
Preferably, the datum mark O3、O4Line perpendicular to intersection point O1、O2Line.
In such scheme preferably, the datum mark O3、O4For positioned at intersection point O1、O2Line both sides the contact
Away from intersection point O on line1、O2The farthest point of line.
In such scheme preferably, the determination datum mark O3、O4Method include：
Connect two intersection point O1、O2The step of；
One right-angle side of square is adjacent in the intersection point O1、O2Line on step；
Square is slided, it is determined that farthest datum mark O3And O4The step of.
In such scheme preferably, the brachium of the compasses in the step S3 is more than the maximum outside diameter of the radome.
The advantage of the invention is that accurate positioning, easy to operate, outfit is more universal.Confirm load(ing) point position with the method
Postpone the verification experimental verification accuracy of loading Position of progress.
Brief description of the drawings
Fig. 1 is datum mark on the plane of symmetry for the preferred embodiment that radome slow test load(ing) point of the present invention determines method
Determine schematic diagram.
Fig. 2 determines schematic diagram for other two datum marks of embodiment illustrated in fig. 1 of the present invention.
Fig. 3 determines schematic diagram for the load(ing) point of embodiment illustrated in fig. 1 of the present invention.
Wherein 1 is square, and 2 be compasses, and 3 be load(ing) point.
Embodiment
To make the purpose, technical scheme and advantage of the invention implemented clearer, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label represent same or similar element or the element with same or like function.Described embodiment is the present invention
A part of embodiment, rather than whole embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to uses
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.Under
Embodiments of the invention are described in detail with reference to accompanying drawing for face.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer " is based on accompanying drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than indicate or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to present invention protection
The limitation of scope.
The problem of confirming present invention aim to address radome slow test load(ing) point, is allowed to meet slow test loading
Requirement, design a kind of confirmation method of radome slow test load(ing) point, complete slow test.The technology solution party of the present invention
Case includes following several steps：
S1, on the face of the radome outer ring its with confirming four datum marks, described four in airframe contact line
Datum mark includes the plane of symmetry of the radome and two intersection point O of the contact line1、O2, two other datum mark O3、O4Point
Wei Yu not described two intersection point O1、O2The both sides of line；
S2, air line distance of each load(ing) point away from four datum marks is determined, select the load(ing) point away from O1、O2Middle distance
Shorter datum mark, the relatively short distance is d1, the load(ing) point is selected away from O3、O4The shorter datum mark of middle distance, the relatively short distance
For d2；
S3, with the load(ing) point away from O1、O2The shorter datum mark of middle distance is origin, with apart from d1For radius, using compasses
The first camber line is drawn on the radome surface, with the load(ing) point away from O3、O4The shorter datum mark of middle distance is origin, with distance
d2For radius, the second camber line is drawn on the radome surface using the compasses, two camber line intersection points of mark are the loading
Point position.
In the present embodiment, radome is generally symmetrical structure, can be covered to ensure that follow-up compasses are done camber line
The outer surface of whole radome, it is desirable to which selected four datum marks divide the contact line equally substantially.The contact line is to work as radome
When being buckled in aircraft fuselage skin, its intersection with fuselage, it is however generally that, the contact line is circular or ellipse, there are other feelings
Condition, such as be irregular figure, or even the occluding surface of contact line formation is three-dimension curved surface, i.e., each point in described contact line
It is convenience described below not in approximately the same plane, the present embodiment is described with regular shapes such as ellipse or circles.
Due to radome be bilateral symmetry, therefore formed similar oval contact line be also it is symmetrical,
On the basis of central axis, the intersection point of itself and contact line is datum mark O1、O2, that is, the plane of symmetry as shown in Figure 1 cuts radar
Cover and two points of the intersection formation of fuselage.Afterwards, by remaining two datum mark O3、O4O is arranged in respectively1、O2The two of line
Side, ensure that 2 points of the arbitrary neighborhood cambered surface not more than 180 degrees surrounded, it is to be understood that if adjacent 2 points
The cambered surface that radome is separated out is more than 180 degree, follow-up to be drawn and be limited on radome using circle rail, as shown in figure 3,
O1、O3The cambered surface for being divided to two datum marks to surround is about 45 degree, needs exist for further parsing, and the cambered surface that surrounds is
Refer in the similar round that is made up of contact line, between two adjacent reference points without other datum marks in the case of, this section is without it
The radian of the camber line of its datum mark.Place, O are faced outwardly in Fig. 31、O3Between without other datum marks；And interior place is faced, O1、O3Between
Also include datum mark O2And O4, so its radian is the radian for the contact line camber line for facing outwardly place.
Referring again to Fig. 3, using compasses 2 with datum mark O1、O3, can only be in this section of radome table faced outwardly when drawing arc
Draw arc on face, and arc can not be drawn on the radome surface in facing, further demonstrate that cambered surface that adjacent 2 points surround not
180 degree can be more than.In step S3, with the load(ing) point away from O1For origin, with apart from d1For radius, using compasses in the radar
Cover surface and draw the first camber line, with the load(ing) point away from O3For origin, with apart from d2For radius, using the compasses in the radar
Cover surface and draw the second camber line, what two camber line intersection points of mark were in the loading Position, Fig. 33 is the load(ing) point.
It should be understood that above-mentioned apart from d1、d2By finite element analysis illustrate in obtain.
In the present embodiment, the datum mark O3、O4Line perpendicular to intersection point O1、O2Line.Further, the base
O on schedule3、O4For positioned at intersection point O1、O2Line both sides the contact line on away from intersection point O1、O2The farthest point of line.
To reach above-mentioned purpose, the determination datum mark O3、O4Method include：
Connect two intersection point O1、O2The step of；
One right-angle side of square is adjacent in the intersection point O1、O2Line on step；
Square is slided, it is determined that farthest datum mark O3And O4The step of.
With reference to Fig. 2, as intersection point O1、O2Line determine after, a right-angle side of square 1 is adjacent on the line, another
Individual right-angle side can intersect with contact line, and intersection point is away from O1、O2The distance of line change with the slip of square 1, it will necessarily go out
An existing maximum, the intersection point where the maximum is datum mark O3Or O4。
In the present embodiment, because radar enclosure volume is larger, general special lengthening compasses 2, it is ensured that the brachium of compasses is more than
The maximum outside diameter of the radome.
The advantage of the invention is that accurate positioning, easy to operate, outfit is more universal.Confirm load(ing) point position with the method
Postpone the verification experimental verification accuracy of loading Position of progress.
It is last it is to be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
The present invention is described in detail with reference to the foregoing embodiments for pipe, it will be understood by those within the art that：It is still
Technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is equally replaced
Change；And these modifications or replacement, the essence of appropriate technical solution is departed from the essence of various embodiments of the present invention technical scheme
God and scope.
Claims (5)
1. a kind of radome slow test load(ing) point determines method, it is characterised in that including：
S1, on the face of the radome outer ring its with confirming four datum marks, four benchmark in airframe contact line
Point includes the plane of symmetry of the radome and two intersection point O of the contact line1、O2, two other datum mark O3、O4Difference position
In described two intersection point O1、O2The both sides of line；
S2, air line distance of each load(ing) point away from four datum marks is determined, select the load(ing) point away from O1、O2Middle distance is shorter
Datum mark, the relatively short distance be d1, the load(ing) point is selected away from O3、O4The shorter datum mark of middle distance, the relatively short distance is
d2；
S3, with the load(ing) point away from O1、O2The shorter datum mark of middle distance is origin, with apart from d1For radius, using compasses in institute
State radome surface and draw the first camber line, with the load(ing) point away from O3、O4The shorter datum mark of middle distance is origin, with apart from d2For
Radius, the second camber line is drawn on the radome surface using the compasses, and two camber line intersection points of mark are the load(ing) point position
Put.
2. radome slow test load(ing) point as claimed in claim 1 determines method, it is characterised in that：The datum mark O3、O4
Line perpendicular to intersection point O1、O2Line.
3. radome slow test load(ing) point as claimed in claim 1 determines method, it is characterised in that：The datum mark O3、O4
For positioned at intersection point O1、O2Line both sides the contact line on away from intersection point O1、O2The farthest point of line.
4. radome slow test load(ing) point as claimed in claim 3 determines method, it is characterised in that：The determination datum mark
O3、O4Method include：
Connect two intersection point O1、O2The step of；
One right-angle side of square is adjacent in the intersection point O1、O2Line on step；
Square is slided, it is determined that farthest datum mark O3And O4The step of.
5. radome slow test load(ing) point as claimed in claim 1 determines method, it is characterised in that：In the step S3
The brachium of compasses is more than the maximum outside diameter of the radome.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710178647.7A CN107084654A (en) | 2017-03-23 | 2017-03-23 | A kind of radome slow test load(ing) point determines method |
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| CN201710178647.7A CN107084654A (en) | 2017-03-23 | 2017-03-23 | A kind of radome slow test load(ing) point determines method |
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Cited By (1)
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| CN106871761A (en) * | 2017-03-30 | 2017-06-20 | 中国航空工业集团公司西安飞机设计研究所 | A kind of radome slow test load(ing) point determines method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106871761A (en) * | 2017-03-30 | 2017-06-20 | 中国航空工业集团公司西安飞机设计研究所 | A kind of radome slow test load(ing) point determines method |
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