CN109211452A - A kind of absolute exciting force acquisition methods of equipment eccentric annular flow - Google Patents
A kind of absolute exciting force acquisition methods of equipment eccentric annular flow Download PDFInfo
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- CN109211452A CN109211452A CN201811107442.0A CN201811107442A CN109211452A CN 109211452 A CN109211452 A CN 109211452A CN 201811107442 A CN201811107442 A CN 201811107442A CN 109211452 A CN109211452 A CN 109211452A
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- absolute
- exciting force
- annular flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a kind of absolute exciting force acquisition methods of equipment eccentric annular flow, include: 1, test suite is installed on Devices to test, test suite includes the supporting surface for connecting Devices to test bottom, the bottom of supporting surface connects pedestals by two stiffness springs, the center point symmetry of the positions of two stiffness springs with respect to Devices to test bottom surface；2, it under the power-equipment normal operating condition of vehicle where Devices to test, acquires and corresponds respectively to the force data at two stiffness spring positions on Devices to test bottom；3, the absolute exciting force of the eccentric annular flow of Devices to test and the eccentric position of absolute exciting force are calculated in conjunction with quality and the inertia rotated about the axis of Devices to test according to the force data.Compared with prior art, the present invention is only it is to be understood that the quality and inertia of equipment, the time domain data of the absolute exciting force of eccentric annular flow and the eccentric position of absolute exciting force can be acquired by the force data collected, method is simple and reliable easily and fast.
Description
Technical field
The present invention relates to equipment dynamic performance evaluation technical fields, more particularly, to a kind of the absolute of equipment eccentric annular flow
Exciting force acquisition methods.
Background technique
On the large-scale apparatus of transport such as steamer, train, many self-vibration equipment are often equipped with, such as: bullet train is adopted
With power decentralized technology, some large scale equipments are directly hung under high-speed train, mainly have braking equipment (air compressor,
Brake cylinder, brak control unit etc.), electrical equipment (accumulator box, inverter, transformer, resistance box etc.) etc..These equipment
It according to the difference of weight and performance, hangs below car body in various ways, some weights of equipment are up to 3 tons or more, often certainly
Body also has vibration stimulus source.Under these vehicles equipment will have a direct impact on vehicle operation comfort and stationarity, it is serious even
It will affect the reliability and safety of car operation.In order to improve iron nitride films performance, the dynamic of analytical equipment is needed
Characteristic, therefore, it is necessary to the absolute exciting force of equipment under accurate perception vehicle.Force snesor is not utilized still at present to obtain equipment bias
The method for motivating absolute exciting force.
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 equipment eccentric annular flows
Absolute exciting force acquisition methods.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of absolute exciting force acquisition methods of equipment eccentric annular flow, comprising the following steps:
S1, test suite is installed on Devices to test, the test suite includes the supporting surface for connecting Devices to test bottom,
The bottom of the supporting surface connects pedestal by two stiffness springs, and the position of two stiffness springs is with respect to Devices to test bottom surface
Center point symmetry；
S2, under the power-equipment normal operating condition of vehicle where Devices to test, acquire Devices to test bottom on respectively
Corresponding to the force data at two stiffness spring positions；
S3, to be measured set is calculated in conjunction with quality and the inertia rotated about the axis of Devices to test according to the force data
The absolute exciting force of standby eccentric annular flow and the eccentric position of absolute exciting force.
Preferably, the force data in the step S2 on Devices to test bottom by corresponding respectively to two stiffness springs
The force snesor installed at position collects.
Preferably, in the step S3 eccentric annular flow of Devices to test absolute exciting force F are as follows:
Wherein, FA、FBTo correspond respectively to the power at two stiffness spring positions on Devices to test bottom,ω
Indicate the frequency of the absolute exciting force of Devices to test, ωnIndicate the frequency of drifting along of Devices to test.
Preferably, the eccentric position of the absolute exciting force of Devices to test is absolutely motivated by Devices to test in the step S3
The distance h of power to Devices to test mass center is indicated:
Wherein, FA、FBTo correspond respectively to the power at two stiffness spring positions on Devices to test bottom, L expression two is just
Property the distance between spring and supporting surface bottom junctions,ω indicates the frequency of the absolute exciting force of Devices to test,
ωnIndicate the frequency of drifting along of Devices to test,ωoIndicate the rotational frequency of Devices to test.
Preferably, describedAre as follows:
Wherein, m indicates the quality of Devices to test, and k indicates the equivalent stiffness of stiffness spring.
Preferably, describedAre as follows:
Wherein, L indicates that the distance between two stiffness springs and supporting surface bottom junctions, J indicate Devices to test around axis
The inertia of line rotation, k indicate the equivalent stiffness of stiffness spring.Compared with prior art, the present invention is only it is to be understood that the quality of equipment
And inertia, the time domain data of the absolute exciting force of eccentric annular flow can be acquired easily and fast by the force data collected
With the eccentric position of absolute exciting force, method is simple and reliable, has highly important engineering application value.
Detailed description of the invention
Fig. 1 is the flow chart of the absolute exciting force acquisition methods of present device eccentric annular flow；
Fig. 2 is the hardware structural diagram of the method for the present invention testing scheme.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in Figure 1, the application proposes a kind of absolute exciting force acquisition methods of equipment eccentric annular flow, including following step
It is rapid:
S1, test suite is installed on Devices to test, as described in Figure 2, test suite includes connection Devices to test bottom
The bottom of supporting surface, supporting surface connects pedestal by two stiffness springs, and the position of two stiffness springs is with respect to Devices to test bottom
The center point symmetry in face, the respectively A of Fig. 2 point and B point；Two stiffness spring positions are corresponded respectively on Devices to test bottom
Installation force snesor in place's disposes force snesor in A point and B point respectively, force snesor connects data collecting instrument；
S2, under the power-equipment normal operating condition of vehicle where Devices to test, to be measured set is acquired by force snesor
The force data at two stiffness spring positions is corresponded respectively on standby bottom；
S3, Devices to test is calculated in conjunction with quality and the inertia rotated about the axis of Devices to test according to force data
The absolute exciting force of eccentric annular flow and the eccentric position of absolute exciting force.
In conjunction with Fig. 2, in the present embodiment, Devices to test is equipment under vehicle, and power-equipment operates normally under stationary vehicle, vehicle
Under state, the kinetics equation of equipment is writeable under vehicle are as follows:
In formula, m indicates the quality of Devices to test；X indicates vertical deviation,It indicates to the secondary derivation of displacement x, i.e. acceleration；
θ indicates that Devices to test is nodded the angle of rotation,Indicate the secondary derivation to θ；J indicates that Devices to test rotates about the axis used
Amount；The absolute exciting force of F expression Devices to test；K=kA=kBIndicate the equivalent rigid of the stiffness spring between pedestal and supporting surface
Degree；L indicates the distance between two stiffness springs and supporting surface bottom junctions A point to B point；H indicates that Devices to test absolutely swashs
Power is encouraged to the distance of Devices to test mass center, i.e. eccentricity.
The frequencies omega of drifting along of Devices to testnMeet:
The rotational frequency ω of Devices to testoMeet:
Had according to geometrical relationship:
Wherein, xA、xBThe dynamic respond of stiffness spring respectively at A, B.
Dividing into standby kinetics equation to measuring car can convert are as follows:
According to mechanical oscillation relevant knowledge, F=Ye can be enablediωt, wherein Y indicates the amplitude of the absolute exciting force F of Devices to test,
ω indicates the frequency of the absolute exciting force F of Devices to test, and t indicates the time, and e is natural logrithm, thenSo
xA=YAeiωt,In formula, YAIndicate the amplitude of the pumping signal measured at measuring point A；
xB=YBeiωt,In formula, YBIndicate the amplitude of the pumping signal measured at measuring point B.
Use FA、FBIt indicates to correspond respectively to the power at two stiffness spring positions, and F on Devices to test bottomA=kxA, FB
=kxB, then the eccentric position for obtaining absolute exciting force and absolute exciting force is respectively as follows:
Wherein,
Claims (6)
1. a kind of absolute exciting force acquisition methods of equipment eccentric annular flow, which comprises the following steps:
S1, test suite is installed on Devices to test, the test suite includes the supporting surface for connecting Devices to test bottom, described
The bottom of supporting surface connects pedestals by two stiffness springs, the center of the positions of two stiffness springs with respect to Devices to test bottom surface
Point symmetry；
S2, under the power-equipment normal operating condition of vehicle where Devices to test, acquire Devices to test bottom on respectively correspond
Force data at two stiffness spring positions；
S3, Devices to test is calculated in conjunction with quality and the inertia rotated about the axis of Devices to test according to the force data
The absolute exciting force of eccentric annular flow and the eccentric position of absolute exciting force.
2. the absolute exciting force acquisition methods of equipment eccentric annular flow under a kind of railway vehicle truck according to claim 1,
It is characterized in that, the force data in the step S2 on Devices to test bottom by corresponding respectively at two stiffness spring positions
The force snesor of installation collects.
3. a kind of absolute exciting force acquisition methods of equipment eccentric annular flow according to claim 1, which is characterized in that described
The absolute exciting force F of the eccentric annular flow of Devices to test in step S3 are as follows:
Wherein, FA、FBTo correspond respectively to the power at two stiffness spring positions on Devices to test bottom,ω is indicated
The frequency of the absolute exciting force of Devices to test, ωnIndicate the frequency of drifting along of Devices to test.
4. a kind of absolute exciting force acquisition methods of equipment eccentric annular flow according to claim 1, which is characterized in that described
The eccentric position of the absolute exciting force of Devices to test passes through the absolute exciting force of Devices to test to Devices to test mass center in step S3
Distance h is indicated:
Wherein, FA、FBTo correspond respectively to the power at two stiffness spring positions on Devices to test bottom, L indicates two Rigid Projectiles
The distance between spring and supporting surface bottom junctions,ω indicates the frequency of the absolute exciting force of Devices to test, ωnTable
Show the frequency of drifting along of Devices to test,ωoIndicate the rotational frequency of Devices to test.
5. a kind of absolute exciting force acquisition methods of equipment eccentric annular flow according to claim 3 or 4, which is characterized in that
It is describedAre as follows:
Wherein, m indicates the quality of Devices to test, and k indicates the equivalent stiffness of stiffness spring.
6. a kind of absolute exciting force acquisition methods of equipment eccentric annular flow according to claim 4, which is characterized in that describedAre as follows:
Wherein, L indicates that the distance between two stiffness springs and supporting surface bottom junctions, J indicate that Devices to test is revolved around axis
The inertia turned, k indicate the equivalent stiffness of stiffness spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107442.0A CN109211452B (en) | 2018-09-21 | 2018-09-21 | Method for acquiring absolute excitation force of equipment eccentric excitation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811107442.0A CN109211452B (en) | 2018-09-21 | 2018-09-21 | Method for acquiring absolute excitation force of equipment eccentric excitation |
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| CN109211452A true CN109211452A (en) | 2019-01-15 |
| CN109211452B CN109211452B (en) | 2020-07-28 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001309503A (en) * | 2000-04-24 | 2001-11-02 | Railway Technical Res Inst | Contact force measuring method and contact force measuring apparatus of pantograph |
| CN102680270A (en) * | 2012-06-07 | 2012-09-19 | 哈尔滨工程大学 | Indirect measurement method for ship excitation load caused by equipment under combined effect of unbalanced excitation force and unbalanced bending moment |
| CN102692331A (en) * | 2012-06-07 | 2012-09-26 | 哈尔滨工程大学 | Indirect testing method for equipment to excitation load of hull structure under vertical unbalance excitation force |
| CN102706527A (en) * | 2012-05-30 | 2012-10-03 | 哈尔滨工程大学 | Quantitative test method for endogenous excitation load of equipment under joint action of unbalanced turbulence force and unbalanced turbulence moment |
| CN104792450A (en) * | 2015-04-09 | 2015-07-22 | 哈尔滨工程大学 | Method for indirectly measuring exciting force of equipment acting on mounting base |
-
2018
- 2018-09-21 CN CN201811107442.0A patent/CN109211452B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001309503A (en) * | 2000-04-24 | 2001-11-02 | Railway Technical Res Inst | Contact force measuring method and contact force measuring apparatus of pantograph |
| CN102706527A (en) * | 2012-05-30 | 2012-10-03 | 哈尔滨工程大学 | Quantitative test method for endogenous excitation load of equipment under joint action of unbalanced turbulence force and unbalanced turbulence moment |
| CN102680270A (en) * | 2012-06-07 | 2012-09-19 | 哈尔滨工程大学 | Indirect measurement method for ship excitation load caused by equipment under combined effect of unbalanced excitation force and unbalanced bending moment |
| CN102692331A (en) * | 2012-06-07 | 2012-09-26 | 哈尔滨工程大学 | Indirect testing method for equipment to excitation load of hull structure under vertical unbalance excitation force |
| CN104792450A (en) * | 2015-04-09 | 2015-07-22 | 哈尔滨工程大学 | Method for indirectly measuring exciting force of equipment acting on mounting base |
Non-Patent Citations (1)
| Title |
|---|
| 郑律: "设备对船体结构激励力估算方法研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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