CN111024349A - High-temperature multi-axis vibration fatigue test method - Google Patents
High-temperature multi-axis vibration fatigue test method Download PDFInfo
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- CN111024349A CN111024349A CN201911338760.2A CN201911338760A CN111024349A CN 111024349 A CN111024349 A CN 111024349A CN 201911338760 A CN201911338760 A CN 201911338760A CN 111024349 A CN111024349 A CN 111024349A
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0208—Specific programs of loading, e.g. incremental loading or pre-loading
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a high-temperature multi-axis vibration fatigue test method, which relates to the technical field of high-temperature vibration fatigue performance test of materials, and comprises the following test instruments: the device comprises a vibration controller, a power amplifier, vibration exciters (two vibration exciters), a slide block guide rail (two slide block guide rails), a square platform, a test piece, a clamp, a high-frequency magnetic induction heating machine, an acceleration sensor, an infrared temperature detector and a paperless recorder. The test steps are as follows: inputting vibration parameters into a vibration controller, and controlling the two vibration exciters through a power amplifier; the method comprises the steps of (starting a high-frequency magnetic induction heating machine to heat a test piece, setting a test heating temperature, detecting the temperature of the test piece through an infrared temperature detector, controlling whether the high-frequency magnetic induction heating machine is heated or not in a closed loop mode, finishing the test according to failure criteria or preset time, and deriving test data.
Description
Technical Field
The invention belongs to the technical field of material vibration fatigue performance testing, and particularly relates to a high-temperature multi-axis vibration fatigue testing method.
Background
The service environment of equipment such as hypersonic critical space aircraft, aircraft engines, gas turbines, etc. is extremely harsh. The important parts of the above equipment are not only exposed to the severe challenge of the ultra-high temperature environment, but also affected by vibration excitation from different directions. Under the action of alternating service load and alternating service temperature, the fatigue life of the material is greatly shortened. And fatigue failure is sudden and often causes serious casualties and economic loss.
At present, the high-temperature vibration research on materials mostly focuses on a single axis, namely, the fatigue behavior of the materials under the conditions of high temperature and single-direction vibration excitation is researched. In practice, however, the components are often subjected to vibration excitations from different directions. In order to improve the reliability of products and ensure the safe operation of equipment, a high-temperature multi-axis vibration fatigue test method is urgently needed for researching the high-temperature vibration fatigue performance of materials for designers to use.
Disclosure of Invention
The invention aims to provide a high-temperature multi-axis vibration fatigue test method aiming at the requirements of high-temperature vibration fatigue performance tests of materials. The failure phenomenon of a material or part under multidirectional cyclic loading is called multi-axial fatigue. The method of the invention takes two vibration exciters with mutually vertical thrust directions as excitation sources, gives the test piece vibration load action with mutually vertical two directions, provides heating of hundreds to thousands of degrees centigrade high temperature for the test piece, and can simulate the working condition of materials which suffer high temperature multi-axis vibration in equipment such as an aircraft engine. At present, the vibration table is used for the research of the vibration fatigue performance of the material, the price of the vibration table is high, the area of a mounting area of the test piece is constant, the vibration table needs to be replaced when the large test piece is replaced, and in addition, the vibration table does not comprise a heating source. The device used in the method is flexible to install, the test piece is installed on a square platform, and the two vibration exciters apply load to the test piece by pushing the square platform. And (5) replacing the square platform when the test piece is large. And the device can also heat the test piece. The whole set of device is flexible to install, complete in function and small in occupied area, and high-temperature multi-axis vibration fatigue performance testing of materials is achieved at a low price.
The technical scheme adopted by the invention is a high-temperature multi-axis vibration fatigue test method, and an assembled test bed comprises the following steps:
the device comprises a vibration controller, a power amplifier, vibration exciters (two vibration exciters), a slide block guide rail (two slide block guide rails), a square platform, a test piece, a clamp, a high-frequency magnetic induction heating machine, an acceleration sensor, an infrared temperature detector and a paperless recorder. The construction method is shown in figure 1.
The connection relation of the components is as follows:
the vibration controller is connected with the power amplifier and the acceleration sensor and controls the power amplifier and the acceleration sensor through computer software;
the two vibration exciters are arranged on the fixed platform or the ground, the thrust directions are horizontal and vertical to each other, and the vibration exciters are connected with the power amplifier;
the side surface of the square platform and the table surface are provided with a certain number of threaded holes, a certain adjacent side of the square platform is selected, and the square platform is connected with a slide block guide rail through a bolt;
the vibration exciter push rod is connected with the slide block guide rail through a bolt;
the clamp is fixed on the table top through a bolt, and the test piece is arranged on the clamp;
the acceleration sensor is adhered to the table top near the clamp;
an induction coil of the high-frequency magnetic induction heating machine is sleeved on the test piece but is not contacted with the test piece;
the infrared temperature detector is connected with the paperless recorder, the mounting positions of the infrared temperature detector and the paperless recorder are random, and the infrared temperature detector can be guaranteed to be aligned to the heating part of the test piece during testing.
Description of the apparatus:
(1) a vibration controller: and controlling vibration parameters of the vibration exciter and collecting data of the acceleration sensor.
(2) A power amplifier: maximum power output is generated to drive the exciter.
(3) Vibration exciter: an exciting force is generated to vibrate the test piece.
(4) High-frequency magnetic induction heating machine: the induction current generated by the conductor under the action of the high-frequency magnetic field and the action of the magnetic field in the conductor cause the conductor to generate heat to heat.
(5) An infrared temperature sensor: and detecting the temperature change of the test piece by using the radiant heat effect, and feeding back the temperature change to the high-frequency magnetic induction heating machine so as to form closed-loop control on the high-frequency magnetic induction heating machine.
(6) The paperless recorder: and the temperature sensor is connected with the infrared temperature sensor and records the temperature change process of the test piece.
(7) An acceleration sensor: and collecting the vibration acceleration of the test piece.
The experimental procedure of the method is as follows:
s1, starting the vibration controller, inputting vibration parameters, and driving the vibration exciter through the power amplifier.
And S2, starting the high-frequency magnetic induction heating machine to heat the test piece.
S3, the infrared temperature detector is aligned to the heating part of the test piece, and the heating temperature of the test piece reaches the preset temperature through closed-loop control.
S4 the test is ended when the test reaches a failure criterion or a predetermined vibration time.
S5 derives the paperless recorder data and the acceleration sensor data.
The invention has the advantages that: a high-temperature multi-axis vibration fatigue test method is provided. The method can simulate the loading condition of the heated end part, embody the mechanical property of the material under high-temperature multi-axis vibration fatigue loading, provide for the research of designers, and provide a fatigue life prediction model and a related mechanical model with physical significance. Moreover, the method can reduce the bench test of the equipment structure design and reduce the design resource and time cost.
Drawings
FIG. 1 is a high temperature multi-axis vibration loading test stand.
Fig. 2 shows an example of a vibration signal, where a is the power spectral density of the vibration signal and b is the time domain version of the vibration signal.
Detailed Description
The invention is further illustrated by a high temperature multi-axial vibration fatigue test with vibration control of nickel-base superalloy GH 4169.
A high-temperature multi-axis vibration fatigue test method is characterized in that: the method comprises the following implementation steps:
step (1): the vibration controller and the power amplifier are started, and the vibration signal shown in fig. 2 is input into the vibration controller. Fig. 2 (a) is a power spectral density of the vibration signal, and fig. 2 (b) is a time domain version of the vibration signal. The vibration controller controls the two vibration exciters, and the vibration directions of the two vibration exciters are horizontal and vertical to each other.
Step (2): and starting the high-frequency magnetic induction heating machine to heat the test piece.
And (3): setting the heating temperature of the test piece in an infrared temperature detector to be 650 ℃, and aligning the infrared temperature detector to the heating part of the test piece.
And (4): and when the test reaches the failure criterion or the preset vibration time, ending the test.
And (5): and (4) deriving test data, including vibration time, test piece vibration acceleration and test piece temperature change history.
The invention provides a high-temperature multi-axis vibration fatigue test method, which relates to the technical field of high-temperature vibration fatigue performance test of materials, and comprises the following test instruments: the device comprises a vibration controller, a power amplifier, vibration exciters (two vibration exciters), a slide block guide rail (two slide block guide rails), a square platform, a test piece, a clamp, a high-frequency magnetic induction heating machine, an acceleration sensor, an infrared temperature detector and a paperless recorder. The test steps are as follows: (1) inputting vibration parameters into a vibration controller, and controlling the two vibration exciters through a power amplifier; (2) starting a high-frequency magnetic induction heating machine to heat the test piece; (3) setting a test heating temperature, detecting the temperature of the test piece by an infrared temperature detector, and controlling whether the high-frequency magnetic induction heating machine is heated or not in a closed loop manner; (4) ending the test according to a failure criterion or a predetermined time; (5) and (6) deriving test data. The method can be used for measuring the high-temperature multi-axial vibration fatigue performance of the material, reduces the design cost and improves the design level.
Claims (2)
1. A high-temperature multi-axis vibration fatigue test method is characterized in that: the device comprises a vibration controller, a power amplifier, a vibration exciter, a slide block guide rail, a square platform, a test piece, a clamp, a high-frequency magnetic induction heating machine, an acceleration sensor, an infrared temperature detector and a paperless recorder;
the vibration controller is connected with the power amplifier and the acceleration sensor and controls the power amplifier and the acceleration sensor through computer software; the two vibration exciters are arranged on the fixed platform or the ground, the thrust directions are horizontal and vertical to each other, and the vibration exciters are connected with the power amplifier; the side surface of the square platform and the table surface are provided with a certain number of threaded holes, a certain adjacent side of the square platform is selected, and the square platform is connected with a slide block guide rail through a bolt;
the vibration exciter push rod is connected with the slide block guide rail through a bolt;
the clamp is fixed on the table top through a bolt, and the test piece is arranged on the clamp;
the acceleration sensor is adhered to the table top near the clamp;
an induction coil of the high-frequency magnetic induction heating machine is sleeved on the test piece but is not contacted with the test piece;
the infrared temperature detector is connected with the paperless recorder, and the mounting positions of the infrared temperature detector and the paperless recorder are arbitrary, so that the infrared temperature detector can be aligned to the heating part of the test piece during testing;
(1) a vibration controller: controlling vibration parameters of a vibration exciter and collecting acceleration sensor data;
(2) a power amplifier: generating a maximum power output to drive the vibration exciter;
(3) vibration exciter: generating an excitation force to vibrate the test piece;
(4) high-frequency magnetic induction heating machine: generating a high-frequency magnetic field, and heating the conductor by utilizing the induced current generated by the conductor under the action of the high-frequency magnetic field and the action of the magnetic field in the conductor to cause the conductor to generate heat;
(5) an infrared temperature sensor: detecting the temperature change of the test piece by using the radiant heat effect, and feeding back the temperature change to the high-frequency magnetic induction heating machine so as to form closed-loop control on the high-frequency magnetic induction heating machine;
(6) the paperless recorder: the infrared temperature sensor is connected with the test piece and used for recording the temperature change process of the test piece;
(7) an acceleration sensor: and collecting the vibration acceleration of the test piece.
2. A high temperature multi-axial vibration fatigue test method as claimed in claim 1, wherein:
the experimental procedure of the method is as follows:
s1, starting a vibration controller, inputting vibration parameters, and driving a vibration exciter through a power amplifier;
s2, starting the high-frequency magnetic induction heating machine to heat the test piece;
s3, aligning the infrared temperature detector to the heating part of the test piece, and leading the heating temperature of the test piece to reach the preset temperature through closed-loop control;
s4, when the test reaches the failure criterion or the preset vibration time, ending the test;
s5 derives the paperless recorder data and the acceleration sensor data.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795792A (en) * | 2020-07-14 | 2020-10-20 | 中国航发沈阳发动机研究所 | Large-diameter U-shaped pipeline vibration fatigue test bed for aircraft engine and using method thereof |
| CN112179596A (en) * | 2020-09-25 | 2021-01-05 | 中国直升机设计研究所 | Durability test method and device for vibration active control actuator |
| CN113504020A (en) * | 2021-05-24 | 2021-10-15 | 国网江苏省电力有限公司电力科学研究院 | GIS vibration defect simulation system and method |
| CN113804379A (en) * | 2021-08-20 | 2021-12-17 | 北京工业大学 | Composite material ultra-high temperature vibration fatigue test method |
| CN114791364A (en) * | 2022-06-23 | 2022-07-26 | 岚图汽车科技有限公司 | Multi-axial bench vibration durability test method and device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111795792A (en) * | 2020-07-14 | 2020-10-20 | 中国航发沈阳发动机研究所 | Large-diameter U-shaped pipeline vibration fatigue test bed for aircraft engine and using method thereof |
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| CN112179596B (en) * | 2020-09-25 | 2022-07-29 | 中国直升机设计研究所 | Durability test method and device for vibration active control actuator |
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| CN114791364A (en) * | 2022-06-23 | 2022-07-26 | 岚图汽车科技有限公司 | Multi-axial bench vibration durability test method and device |
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Application publication date: 20200417 |
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