CN110119569A - A kind of test load lever system spatial movement analogy method - Google Patents
A kind of test load lever system spatial movement analogy method Download PDFInfo
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- CN110119569A CN110119569A CN201910385028.4A CN201910385028A CN110119569A CN 110119569 A CN110119569 A CN 110119569A CN 201910385028 A CN201910385028 A CN 201910385028A CN 110119569 A CN110119569 A CN 110119569A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 3
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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Abstract
The present invention provides a kind of tests to load lever system spatial movement analogy method, this method calculates the coordinate position matrix of each lever and connector under different load steps in global coordinate system, and each load is arranged and walks the coordinate position matrix of each lever and connector part to realize the dynamic motion of lever.The space coordinate of each loading equipemtn in present invention combination loading procedure calculates equipment new coordinate origin and the system of axis.According to equipment new coordinate origin and the system of axis, it can realize that the spatial position of loading equipemtn quickly updates in CAD software and realize that the spatial position of loading equipemtn quickly updates, and updated loading equipemtn is carried out to interfere/collision detection, the safe condition that can judge loading system in advance has important booster action to experimental design.
Description
Technical field
The invention belongs to test load lever system design field, and in particular to a kind of test load lever system space fortune
Dynamic analogy method.
Background technique
Civil aircraft when carrying out static construction test frequently with the loading system comprising multi-grade lever, if in test aircraft
Structure generates big deformation, then lever system can also generate biggish displacement, thus the collision inside possible initiation, interference,
It may collide with other test facilities such as support systems.Mainly pass through the experience of designer in experimental design at present
Or manual operation is carried out in CAD software to assist the anticipation to space motion safety.Large-scale experiment loading system is complicated, people
Work method heavy workload and exist erroneous judgement possibility, thus height carry important tests operating condition in collision once occurred the problem of,
Bring certain risk.This method can realize automatically the spatial movement simulation of test load lever system by CAD software, auxiliary
Experimental design personnel are helped to collide, interference checking, this method is efficient and convenient and precision is high.
Summary of the invention
The present invention provides in a kind of test loading procedure loading equipemtn coordinates matrix conversion calculation method, it can be achieved that testing
The preceding space coordinate according to loading equipemtn each in loading procedure carries out the spatial position of loading equipemtn in CAD software fast
Speed updates.
Technical solution:
For the lever part in lever load system, there is known three points, left end point, right endpoint, intermediate point.Even
There is known two points, upper extreme point and lower extreme point in fitting part.In loading procedure, lever system occurs with malformation
It moves, coordinates of these points also change in lever and connector.
A kind of test load lever system spatial movement analogy method, process are as follows: calculated not in global coordinate system
With the coordinate position matrix of each lever and connector under load step, and the seat that each load walks each lever and connector part is set
Cursor position matrix realizes the dynamic motion of lever.
Preferably, the coordinate position matrix calculating process of lever is as follows: coordinate origin is the intermediate point of lever part；The side X
To: the vector that the line of lever part left end point and right endpoint is constituted；Y-direction: by lever part left end point, right endpoint, the thick stick
Any one next stage lever intermediate point of bar connection, one plane of this 3 points buildings, the normal of this plane is Y-direction；The side Z
To: according to right-handed coordinate system rule, X-direction multiplication cross Y-direction, as Z-direction.
Preferably, the coordinate position matrix calculating process of connector part is as follows: coordinate origin is under connector part
Endpoint；Z-direction: the vector that connector part upper extreme point and lower extreme point line are constituted；Y-direction: by connector part upper extreme point, under
The upper level lever intermediate point that endpoint, the connector connect, one plane of this 3 points buildings, the normal of this plane is Y-direction；
X-direction: according to right-handed coordinate system rule, Y-direction multiplication cross Z-direction, as X-direction.
The utility model has the advantages that
The space coordinate of each loading equipemtn in present invention combination loading procedure, calculates the new coordinate origin of equipment and seat
Parameter system.According to equipment new coordinate origin and the system of axis, it can realize that the spatial position of loading equipemtn is quick in CAD software
It updates, and updated loading equipemtn is carried out to interfere/collision detection, the safe condition of loading system can be judged in advance, to examination
Testing design has important booster action.
Detailed description of the invention
Fig. 1 is lever and its connection relationship diagram in specific embodiment.
Fig. 2 is connector and its connection relationship diagram in specific embodiment.
Fig. 3 is the schematic diagram of loading system original state in specific embodiment.
Fig. 4 is the schematic diagram of loading system end-state in specific embodiment.
Specific embodiment
The technical solution of invention is further described by specific embodiment.
By taking some lever system as an example, taking lever i is research object (as shown in Figure 1): left end point i1, right endpoint is
i2, intermediate point i3, the intermediate point of the next stage lever of left end point connection is j3, the centre of the next stage lever of right endpoint connection
Point is k3。
The reference coordinate Shafting calculation method of lever i is as follows:
Coordinate origin: Oi=i3
X-direction:
Y-direction:
Z-direction:
It, can also be by j in calculation formula in the Y direction3Replace with k3, that is, any one endpoint of lever left and right ends may be selected
The intermediate point of the next stage lever of connection carries out coordinate conversion.
Taking connector k is research object (as shown in Figure 2), and the reference coordinate Shafting calculation method of connector k is as follows:
Coordinate origin: Ok=k3
The direction z:
Y-direction:
The direction x:
According to the above coordinate transformation method, the coordinate origin and reference axis for testing that equipment is new under each load walks can be calculated
System, then quickly updates the spatial position of loading equipemtn in CAD software, realizes the spatial movement simulation of loading equipemtn
(Fig. 3 is the schematic diagram of certain aircraft loading system original state, and Fig. 4 is the effect signal of end-state after spatial position updates
Figure).Experimental design personnel can by range estimation or by CAD software interference/collision detection function to updated loading equipemtn
It carries out interfering/collision detection, ancillary test design.
Claims (5)
1. a kind of test loads lever system spatial movement analogy method, which is characterized in that this method is fallen into a trap in global coordinate system
The coordinate position matrix of each lever and connector under different load steps is calculated, and each load is set and walks each lever and connector zero
The coordinate position matrix of part realizes the dynamic motion of lever.
2. a kind of test as described in claim 1 loads lever system spatial movement analogy method, which is characterized in that lever
Coordinate position matrix calculating process is as follows:
Coordinate origin is the intermediate point of lever part；
X-direction: the vector that the line of lever part left end point and right endpoint is constituted；
Y-direction: any one the next stage lever intermediate point connected by lever part left end point, right endpoint, the lever, this 3 structures
A plane is built, the normal of this plane is Y-direction；
Z-direction: according to right-handed coordinate system rule, X-direction multiplication cross Y-direction, as Z-direction.
3. a kind of test as described in claim 1 loads lever system spatial movement analogy method, which is characterized in that connector
The coordinate position matrix calculating process of part is as follows:
Coordinate origin is the lower extreme point of connector part；
Z-direction: the vector that connector part upper extreme point and lower extreme point line are constituted；
Y-direction: the upper level lever intermediate point connected by connector part upper extreme point, lower extreme point, the connector, this 3 points buildings
One plane, the normal of this plane are Y-direction；
X-direction: according to right-handed coordinate system rule, Y-direction multiplication cross Z-direction, as X-direction.
4. a kind of test as described in claim 1 loads lever system spatial movement analogy method, which is characterized in that calculating
After testing the coordinate origin and the system of axis that equipment is new under each load walks out, to the spatial position of loading equipemtn in CAD software
It is quickly updated, realizes the spatial movement simulation of loading equipemtn.
5. a kind of test as claimed in claim 4 loads lever system spatial movement analogy method, which is characterized in that test is set
Meter personnel can touch by range estimation or by the interference/collision detection function interfere to updated loading equipemtn/of CAD software
Hit inspection, ancillary test design.
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| CN201910385028.4A CN110119569A (en) | 2019-05-09 | 2019-05-09 | A kind of test load lever system spatial movement analogy method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103678737A (en) * | 2012-09-07 | 2014-03-26 | 中国飞机强度研究所 | Lever system virtual assembly method |
| CN107655650A (en) * | 2017-09-27 | 2018-02-02 | 上海交通大学 | Lever load system collision checking method for structural test |
| CN109703781A (en) * | 2018-12-07 | 2019-05-03 | 中国飞机强度研究所 | A kind of calculating design method of lever system |
-
2019
- 2019-05-09 CN CN201910385028.4A patent/CN110119569A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103678737A (en) * | 2012-09-07 | 2014-03-26 | 中国飞机强度研究所 | Lever system virtual assembly method |
| CN107655650A (en) * | 2017-09-27 | 2018-02-02 | 上海交通大学 | Lever load system collision checking method for structural test |
| CN109703781A (en) * | 2018-12-07 | 2019-05-03 | 中国飞机强度研究所 | A kind of calculating design method of lever system |
Non-Patent Citations (2)
| Title |
|---|
| 万春华等: "基于静力模型的飞翼布局飞机颤振特性研究", 《计算机仿真》 * |
| 陈庆童等: "直升机静力试验杠杆加载系统的自动化设计", 《直升机技术》 * |
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