CN107655650B - Lever load system collision checking method for structural test - Google Patents
Lever load system collision checking method for structural test Download PDFInfo
- Publication number
- CN107655650B CN107655650B CN201710889617.7A CN201710889617A CN107655650B CN 107655650 B CN107655650 B CN 107655650B CN 201710889617 A CN201710889617 A CN 201710889617A CN 107655650 B CN107655650 B CN 107655650B
- Authority
- CN
- China
- Prior art keywords
- lever
- point
- load
- endpoint
- equations
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Peptides Or Proteins (AREA)
Abstract
The present invention relates to a kind of lever load system collision checking methods for structural test, in the connection relationship, size and initial position for giving each lever, and under the premise of the displacement of body structure surface load(ing) point and actuator Anchor displacement are known, calculate the coordinate of each lever endpoint in lever load system, for the demonstration and analysis on its rationality of testing program, and during prediction experiment, whether lever load system can collide.Compared with prior art, the present invention has many advantages, such as that precision of prediction is high.
Description
Technical field
The present invention relates to structure static strength tests, collide more particularly, to a kind of lever load system for structural test
Detection method.
Background technique
In full machine or the modular construction test of aircraft, ground experiment is the weight verified design scheme, reduce design risk
Want method.It needs load suffered by structure (aerodynamic loading, inertial load, concentrfated load etc.) being reduced to a limited number of concentrations
Load arranges load(ing) point in corresponding position, connects loading system to simulate true loading conditions, loading system generallys use one group
Load of the actuator to multiple points may be implemented in the lever connected step by step.Currently, domestic structural test design studies work
It is that certain factories have worked out some complementary calculation procedures as status, as distributed load calculation, lever calculate, with re-computation
Deng.
If in test, aircaft configuration generates big deformation, then lever system can also generate biggish displacement, therefore can
Collision, interference inside capable of causing, it is also possible to collide with other test facilities, in order to predict the dry of this loading system
It relates to, the threedimensional model of lever load system can be established with computer aided design software, then changed according to the displacement of lever
The coordinate of lever, to identify the interference situation of lever system under deformation state.But how to be implemented as needing instantly
It solves the problems, such as.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of precision of prediction is high
Lever load system collision checking method for structural test.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of lever load system collision checking method for structural test, the connection relationship for giving each lever,
Size and initial position, and under the premise of the displacement of body structure surface load(ing) point and actuator Anchor displacement are known, calculate lever
The coordinate of each lever endpoint in loading system is used for testing program demonstration and analysis on its rationality, and thick stick during prediction experiment
Whether bar loading system can collide.
Preferably, the coordinate for calculating each lever endpoint in lever load system specifically:
Nonlinear System of Equations is established to each lever in lever load system, equation group meets balance in the initial state
Relationship；Under malformation state, the coordinate of body structure surface point and actuator fixed point is known variables, is substituted into equation
Group solves the coordinate of each lever endpoint using Solving Nonlinear Systems of Equations method.
Preferably, the Nonlinear System of Equations is established specific as follows:
For i-th of lever, two-end-point i1(xi1,yi1,zi1) and i2(xi2,yi2,zi2), the lever and higher level's lever
The endpoint of connection is h1(xh1,yh1,zh1), it is in the initial state known quantity, is amount to be asked when structure deforms；
Length of the lever midpoint apart from two-end-point is respectively m and n, is definite value in the case where testing program determines；Lever
On load(ing) point be i3, coordinate is
VectorFor the endpoint i of lever1With the line of load(ing) point on low primary lever j, length Lj,For lever
Endpoint i2With the line of low primary lever k load(ing) point, length Lk, LjAnd LkIt remains unchanged during loading
Introduce vector i1j3And its unit vector Unit vector be
On lever i, endpoint to its load(ing) point i3Vector be respectivelyWith
Inlet coefficient R
Introduce vectorWith
h1For the endpoint of upper level lever；
Nonlinear System of Equations is established to lever i
Wherein lastThree equations can be obtained after expansion, constitute about lever i extreme coordinates
Equation group.
Preferably, the i for minimum primary lever, in equation group3And k3For the point of body structure surface, for thick stick at the highest level
Bar, the h in above-mentioned calculating process1For the fixed point of actuator.
Preferably, the equation group as shown in formula (10) is established to all levers by above-mentioned equation, is being combined into entire lever
The Nonlinear System of Equations of system displacement.
Preferably, whether lever load system can collide during the prediction experiment specifically: described in solution
The displacement of lever in the case that structure is subjected to displacement can be obtained in the Nonlinear System of Equations of entire lever system displacement；According to each
The outer dimension of a lever endpoint location and actually used lever, by calculating or obtaining its occupied sky with drawing
Between, judge whether space shared by adjacent lever interferes, lever in practice is represented if interfering can collide and interfere；
Similarly, judge that other test facilities take up space whether to take up space with lever to interfere, representative conference is sent out if interfering
Raw collision.
Compared with prior art, the present invention is directed to aeronautic structure test of static strength lever load system deformation simulative part,
Can solve aeronautic structure actuator driving under occur large deformation when, entire lever load system in the position in space, thus into
One step calculate to a nicety test during lever load system whether can collide.
Detailed description of the invention
Fig. 1 is lever system schematic diagram；
When Fig. 2 is that malformation is larger, calculation flow chart is solved gradually with lesser incremental deformation；
Fig. 3 is the coordinate schematic diagram before deforming in specific embodiment；
Fig. 4 is deformed coordinate schematic diagram in specific embodiment.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
Lever load system it is as shown in Figure 1 with the definition of body structure surface load(ing) point.For i-th of lever, two-end-point
For i1(xi1,yi1,zi1) and i2(xi2,yi2,zi2), an endpoint of higher level's lever is h1(xh1,yh1,zh1), in the initial state
It is amount to be asked when structure deforms for known quantity.Length of the lever midpoint apart from two-end-point is respectively m and n, in test side
Case is definite value in the case where determining；Load(ing) point on lever is i3, coordinate isVectorWithRespectively two endpoints of lever with
The line of low primary lever j and lever k intermediate point, length are respectively LjAnd Lk, remain unchanged during loading.
Introduce vector i1j3And its unit vector
Inlet coefficient R
Introduce vectorWith
Nonlinear System of Equations is established to lever i
Wherein lastThree equations can be obtained after obtaining vector expansion, here it is about lever i
The equation group of extreme coordinates.I for minimum primary lever, in equation group3And k3For the point of body structure surface, for highest level
Lever, the h in above-mentioned calculating process1For the fixed point of actuator.
The equation group as shown in formula (10) is established to all levers by above-mentioned equation, is being combined into entire lever system displacement
Nonlinear System of Equations.Equation group meets equilibrium relation in the initial state；Under malformation state, body structure surface point and work
The coordinate of dynamic device fixed point is known variables, is substituted into equation group, solves each thick stick using Solving Nonlinear Systems of Equations method
The coordinate of rod end point.
If malformation is larger, need gradually to solve equation, the flow chart of calculating such as Fig. 2 institute with lesser incremental deformation
Show:
The present invention is described in detail combined with specific embodiments below.
Take one up to second level lever system as simulated object (all length unit is mm), initial situation is such as
Shown in Fig. 3: two primary lever length are respectively 994.3mm, 1003.3mm, 1006.6mm and 1004.1mm (by minimum in Fig. 3
Level-one point from left to right sequence)；The long 1000mm of second lever；Body structure surface point coordinate is (from left to right by minimum level-one point in Fig. 3
Sequentially) for (38141.3,605.7,1400), (38365,596.7,1600), (38594.4,593.4,1800) and
(38823.8,595.9,2000)；Actuator fixed point coordinate is (38543.6,4600,1754.9).
Primary lever extreme coordinates in figure: (38141.3,1600,1400), (38365.3,1600,1600),
(38594.4,1600,1800)、(38823.8,1600,2000)。
Second lever extreme coordinates: (38268.7,2600,1513.9), (38719.6,2600,1909.2).
Assuming that actuator effect flowering structure surface point coordinates become (38141.3,610.13,1400), (38365,
621.6,1400), (38594.4,648.56,1400), (38823.8,684.61,1400).Grid zone after variation is entered into equation
Lever each point coordinate after deformation is calculated, as shown in Figure 4 in group.
The coordinate value of each lever endpoint after deforming is calculated are as follows:
Primary lever endpoint: (38156.7,2025.6,1413.6), (38367.6,2125.6,1602.2),
(38596.8,2228.7,1802.1)、(38812.1,2333.7,1989.1)。
Second lever endpoint: (38284.9,3082.5,1528.2), (38709.1,3286.0,1899.9).
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (4)
1. a kind of lever load system collision checking method for structural test, which is characterized in that giving each lever
Connection relationship, size and initial position, and under the premise of the displacement of body structure surface load(ing) point and actuator Anchor displacement are known, meter
The coordinate of each lever endpoint in lever load system is calculated, testing program demonstration and analysis on its rationality, and prediction experiment are used for
Whether lever load system can collide in the process；
The coordinate for calculating each lever endpoint in lever load system specifically:
Nonlinear System of Equations is established to each lever in lever load system, equation group meets balance and closes in the initial state
System；Under malformation state, the coordinate of body structure surface point and actuator fixed point is known variables, is substituted into equation group,
The coordinate of each lever endpoint is solved using Solving Nonlinear Systems of Equations method；
The Nonlinear System of Equations is established specific as follows:
For i-th of lever, two-end-point i1(xi1, yi1, zi1) and i2(xi2, yi2, zi2), higher level's lever is connect with the lever
Endpoint be h1(xh1, yh1, zh1), it is in the initial state known quantity, is amount to be asked when structure deforms；
Length of the lever midpoint apart from two-end-point is respectively m and n, is definite value in the case where testing program determines；On lever
Load(ing) point is i3, coordinate is
VectorFor the endpoint i of lever1With the line of load(ing) point on low primary lever j, length Lj,For the endpoint of lever
i2With the line of low primary lever k load(ing) point, length Lk, LjAnd LkIt remains unchanged during loading；
Introduce vector i1j3And its unit vector Unit vector be
On lever i, endpoint to its load(ing) point i3Vector be respectivelyWith
Inlet coefficient R
Introduce vectorWith
h1For the endpoint of upper level lever；
Nonlinear System of Equations is established to lever i
Wherein lastThree equations can be obtained after expansion, constitute the equation about lever i extreme coordinates
Group.
2. collision checking method according to claim 1, which is characterized in that the i for minimum primary lever, in equation group3
And k3H for the point of body structure surface, for lever at the highest level, in above-mentioned calculating process1For the fixed point of actuator.
3. collision checking method according to claim 1, which is characterized in that establish all levers as public by above-mentioned equation
Equation group shown in formula (10) is combined into the Nonlinear System of Equations of entire lever system displacement.
4. collision checking method according to claim 3, which is characterized in that lever-loading during the prediction experiment
Whether system can collide specifically: structure can be obtained in the Nonlinear System of Equations for solving the entire lever system displacement
In the case where being subjected to displacement, the displacement of lever；According to the outer dimension of each lever endpoint location and actually used lever, pass through
It calculates or obtains its occupied space with drawing, judge whether space shared by adjacent lever interferes, if interfering
Then representing lever in practice can collide and interfere；Similarly, judge other test facilities take up space whether with shared by lever
Space interferes, and representative conference collides if interfering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889617.7A CN107655650B (en) | 2017-09-27 | 2017-09-27 | Lever load system collision checking method for structural test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710889617.7A CN107655650B (en) | 2017-09-27 | 2017-09-27 | Lever load system collision checking method for structural test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107655650A CN107655650A (en) | 2018-02-02 |
| CN107655650B true CN107655650B (en) | 2019-09-27 |
Family
ID=61116932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710889617.7A Active CN107655650B (en) | 2017-09-27 | 2017-09-27 | Lever load system collision checking method for structural test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107655650B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109703781B (en) * | 2018-12-07 | 2022-04-19 | 中国飞机强度研究所 | Calculation design method of lever system |
| CN110119569A (en) * | 2019-05-09 | 2019-08-13 | 中国飞机强度研究所 | A kind of test load lever system spatial movement analogy method |
| CN110108544A (en) * | 2019-05-09 | 2019-08-09 | 中国飞机强度研究所 | Radial lever load system space initial position determines method |
| CN114544129A (en) * | 2022-01-07 | 2022-05-27 | 航天科工防御技术研究试验中心 | Electromagnetic control impact response spectrum generation system and working method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103678737B (en) * | 2012-09-07 | 2016-12-07 | 中国飞机强度研究所 | A kind of lever system dummy assembly method |
| CN102991726A (en) * | 2012-12-10 | 2013-03-27 | 中国飞机强度研究所 | Loading system and method for airplane structure test |
| CN203275184U (en) * | 2013-05-27 | 2013-11-06 | 北京强度环境研究所 | Multi-stage pressing type lever mechanism device |
| CN104807630B (en) * | 2015-05-13 | 2017-07-25 | 中国科学院工程热物理研究所 | A kind of H types blade of vertical axis wind turbine static construction experimental rig and method |
-
2017
- 2017-09-27 CN CN201710889617.7A patent/CN107655650B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107655650A (en) | 2018-02-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107655650B (en) | Lever load system collision checking method for structural test | |
| CN106227977B (en) | A kind of method of the steel structure net rack hydraulic pressure lift time-varying finite element analysis based on BIM | |
| CN107784154B (en) | Earthquake resistance probability evaluation method based on behavior bispectrum | |
| CN104933639B (en) | A kind of small signal stability rapid analysis method for large-scale electrical power system | |
| CN110631792B (en) | Seismic hybrid test model updating method based on convolutional neural network | |
| CN106777549B (en) | Bridge multi-scale finite element simulation method for load test | |
| CN104298857B (en) | Mechanism reliability calculating method based on multi-factor coupling | |
| Zhang et al. | A flutter prediction method with low cost and low risk from test data | |
| Abenhaim et al. | A virtual fixture using a FE-based transformation model embedded into a constrained optimization for the dimensional inspection of nonrigid parts | |
| CN116698471B (en) | Static strength test method for aircraft control surface | |
| CN107958124A (en) | A kind of mixed-scale coupling process based on distribution mode of contact stresses optimization | |
| JP2021002342A (en) | Fast method for computer-based simulation | |
| CN111680370A (en) | Design method and design device of hydraulic valve | |
| CN106844991B (en) | Air spring rigidity self-balancing iterative identification method for air floating type vibration control system | |
| CN107688691A (en) | A kind of method for numerical simulation of timber structure truss plate connection joints performance | |
| KR101158637B1 (en) | Experimental frame for efficient simulation data collection, and simulation method and system using it | |
| Kranjc et al. | An interface force measurements-based substructure identification and an analysis of the uncertainty propagation | |
| CN104008234B (en) | Method for correcting closely spaced mode model with damping structure | |
| CN115374667A (en) | Inverse analysis method based on influence of steel structure construction deformation on structure design performance | |
| CN103246785A (en) | Force-directed virtual assembly method | |
| da Silva et al. | Design and analysis of steel structures considering the 3D behaviour of the joints | |
| CN115357976A (en) | Iterative calculation method of large-span steel structure construction scheme based on structural performance | |
| Barreto et al. | Low uncertainty method for inertia tensor identification | |
| CN112528528B (en) | Earthquake-resistant calculation mode superposition method for hybrid structure | |
| Chernyatin et al. | Experimental and computational method for determining parameters of stress-strain state from the data obtainable by interference optical techniques |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |