CN114062493B - Nonlinear ultrasonic in-situ online detection characterization method for dehumidifying damage of solid propellant - Google Patents
Nonlinear ultrasonic in-situ online detection characterization method for dehumidifying damage of solid propellant Download PDFInfo
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- CN114062493B CN114062493B CN202111281900.4A CN202111281900A CN114062493B CN 114062493 B CN114062493 B CN 114062493B CN 202111281900 A CN202111281900 A CN 202111281900A CN 114062493 B CN114062493 B CN 114062493B
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- 239000004449 solid propellant Substances 0.000 title claims abstract description 67
- 238000012512 characterization method Methods 0.000 title claims abstract description 45
- 230000006378 damage Effects 0.000 title claims abstract description 43
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 230000005284 excitation Effects 0.000 claims abstract description 63
- 230000004044 response Effects 0.000 claims abstract description 25
- 238000007791 dehumidification Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000002474 experimental method Methods 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 11
- 239000003380 propellant Substances 0.000 abstract description 6
- 208000027418 Wounds and injury Diseases 0.000 description 4
- 208000014674 injury Diseases 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/11—Analysing solids by measuring attenuation of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/12—Analysing solids by measuring frequency or resonance of acoustic waves
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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
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0421—Longitudinal waves
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to a nonlinear ultrasonic in-situ online detection characterization method for dehumidifying damage of a solid propellant, which comprises the following steps: measuring the length l of a solid propellant dumbbell test piece; constructing a solid propellant dehumidifying damage nonlinear ultrasonic characterization system; setting an excitation frequency f through nonlinear ultrasonic in-situ online detection characterization software, giving an excitation signal with the excitation frequency f to an excitation piezoelectric wafer by using a signal excitation device, acquiring a response time domain signal on the acquisition piezoelectric wafer by using a signal acquisition device, and carrying out Fourier transform on the response time domain signal to obtain a response frequency domain signal; selecting a signal amplitude A corresponding to the excitation frequency f on the response frequency domain signal 1 Signal amplitude a corresponding to excitation frequency 2f 2 And calculating to obtain nonlinear ultrasonic characterization parameters. The invention relates to a method for directly and effectively detecting and characterizing the dehumidification damage of a propellant material on line in situ.
Description
Technical Field
The invention relates to a method for detecting solid propellant dehumidification damage, in particular to a nonlinear ultrasonic in-situ online detection characterization method for solid propellant dehumidification damage.
Background
The composite solid propellants currently in widespread use are highly filled elastomers containing a large number of solid particles, which are heterogeneous on a microscopic scale. When the composite solid propellant material is stretched, factors such as the size and distribution of the filler particles, the variation in bond strength between the particles and the binder, etc., all result in highly non-uniform local stress and strength fields, such that the location and extent of the damage will vary in a random manner. The form of damage may be in the form of particles separated from the binder, known as de-wetting. The main form of damage and destruction of the propellant caused by the interface dehumidification of the composite solid propellant is a key factor influencing the mechanical properties of the solid propellant, so that the online characterization of the dehumidification damage behavior of the solid propellant is of great significance.
At present, the technology in the aspect of nonlinear ultrasonic in-situ online detection and characterization of the solid propellant dehumidification injury does not exist, but the nonlinear ultrasonic nondestructive detection method utilizes various ultrasonic nonlinear response signals when ultrasonic waves are transmitted in the material, and can be used as an effective method for in-situ online characterization of the solid propellant material dehumidification injury.
Disclosure of Invention
Aiming at the problems, the invention provides a nonlinear ultrasonic in-situ online detection characterization method for dehumidifying damage of a solid propellant. The method comprises the steps of carrying out in-situ online detection and characterization on the dehumidification damage of the solid propellant material by using a nonlinear ultrasonic method, constructing a health detection system for the nonlinear ultrasonic characterization of the dehumidification damage of the solid propellant, carrying out in-situ stretching experiments on a dumbbell-shaped solid propellant test piece, obtaining nonlinear characterization parameters of the dehumidification damage of the solid propellant material under the action of load, and constructing the nonlinear ultrasonic online characterization method of the dehumidification damage of the propellant material.
The technical scheme of the invention is as follows:
the invention provides a nonlinear ultrasonic characterization system for dehumidifying damage of a solid propellant
A nonlinear ultrasonic characterization system for dehumidifying damage of a solid propellant comprises a solid propellant dumbbell test piece; the upper surface of the solid propellant dumbbell test piece is coupled with an excitation piezoelectric wafer, and the lower surface of the solid propellant dumbbell test piece is coupled with a collection piezoelectric wafer; the system also comprises a computer provided with nonlinear ultrasonic in-situ on-line detection characterization software, wherein the computer is connected with the exciting piezoelectric wafer through a signal exciting device and connected with the collecting piezoelectric wafer through a signal collecting device.
The invention provides a nonlinear ultrasonic in-situ online detection characterization method of solid propellant dehumidifying damage, which comprises the following steps:
step 1: measuring the length l of a solid propellant dumbbell test piece;
step 2: construction of solid propellant dehumidifying damage nonlinear ultrasonic characterization system
The upper surface of the solid propellant dumbbell test piece is coupled with an excitation piezoelectric wafer, and the lower surface of the solid propellant dumbbell test piece is coupled with a collection piezoelectric wafer;
the system also comprises a computer provided with nonlinear ultrasonic in-situ on-line detection characterization software, wherein the computer is connected with the exciting piezoelectric wafer through a signal exciting device and connected with the collecting piezoelectric wafer through a signal collecting device;
step 3: setting an excitation frequency f through nonlinear ultrasonic in-situ online detection characterization software, giving an excitation signal with the excitation frequency f to an excitation piezoelectric wafer by using a signal excitation device, acquiring a response time domain signal on the acquisition piezoelectric wafer by using a signal acquisition device, and carrying out Fourier transform on the response time domain signal to obtain a response frequency domain signal;
step 4: selecting a signal amplitude A corresponding to the excitation frequency f on the response frequency domain signal 1 Signal amplitude a corresponding to excitation frequency 2f 2 Calculating to obtain nonlinear ultrasonic characterization parameter beta
Wherein, beta is nonlinear ultrasonic characterization parameter, unit: s;
f is the fundamental frequency of the excitation signal, unit: kHz;
A 1 signal amplitude corresponding to excitation frequency f, unit: dimensionless;
A 2 the unit is the signal amplitude corresponding to the excitation frequency 2 f: dimensionless;
l is the length of the solid propellant dumbbell test piece in units: mm;
c is the longitudinal wave velocity of the excitation signal in the solid propellant dumbbell test piece, in units of: km/s; c=l/t; t is the initial time of acquiring the response time domain signal, and the unit is: us;
step 5: and (3) through carrying out an in-situ stretching experiment on the solid propellant dumbbell test piece, calculating nonlinear ultrasonic characterization parameters beta under different stretching displacements, and comparing the change of beta to obtain the online characterization information of the dehumidification damage of the solid propellant dumbbell test piece in the in-situ stretching process.
Preferably, the excitation signal is a multicycle sinusoidal excitation signal.
The invention has the technical effects that:
compared with other methods, the method for directly and effectively in-situ online detecting and characterizing the dehumidification damage of the propellant material has the advantages that the nonlinear ultrasonic characterization parameters are used for online characterizing the dehumidification damage of the solid propellant material, so that the accuracy and the simplicity of the detection of the dehumidification damage of the propellant material can be greatly improved, and the method for directly and effectively in-situ online detecting and characterizing the dehumidification damage of the propellant material is provided.
Drawings
FIG. 1 is a schematic diagram of a solid propellant dehumidifying damage nonlinear ultrasonic characterization system of the present invention.
Fig. 2 is a schematic diagram showing the variation of the nonlinear ultrasonic characterization parameter beta of the solid propellant dumbbell test piece in the in-situ stretching experiment.
Reference numerals: 1. a computer; 2. a signal excitation device; 3. exciting the piezoelectric wafer; 4. solid propellant dumbbell test pieces; 5. collecting a piezoelectric wafer; 6. and a signal acquisition device.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1- -solid propellant dehumidification injury nonlinear ultrasound characterization System
A nonlinear ultrasonic characterization system for dehumidifying damage of a solid propellant comprises a solid propellant dumbbell test piece 4; the upper surface of the solid propellant dumbbell test piece 4 is coupled with an excitation piezoelectric wafer 3, and the lower surface is coupled with a collection piezoelectric wafer 5; the system also comprises a computer 1 provided with nonlinear ultrasonic in-situ on-line detection characterization software, wherein the computer 1 is connected with an exciting piezoelectric wafer 3 through a signal exciting device 2 and is connected with an collecting piezoelectric wafer 5 through a signal collecting device 6.
Example 2-a method for characterization of solid propellant dehumidification injury by nonlinear ultrasonic in situ on-line detection, the method is as follows:
step 1: measuring the length l of the solid propellant dumbbell test piece 4;
step 2: construction of solid propellant dehumidifying damage nonlinear ultrasonic characterization system
The upper surface of the solid propellant dumbbell test piece 4 is coupled with an excitation piezoelectric wafer 3, and the lower surface is coupled with a collection piezoelectric wafer 5; the system also comprises a computer 1 provided with nonlinear ultrasonic in-situ on-line detection characterization software, wherein the computer 1 is connected with an excitation piezoelectric wafer 3 through a signal excitation device 2 and is connected with an acquisition piezoelectric wafer 5 through a signal acquisition device 6;
step 3: setting an excitation frequency f through nonlinear ultrasonic in-situ online detection characterization software, giving an excitation signal with the excitation frequency f to an excitation piezoelectric wafer 3 by using a signal excitation device 2, acquiring a response time domain signal on an acquisition piezoelectric wafer 5 by using a signal acquisition device 6, and carrying out Fourier transform on the response time domain signal to obtain a response frequency domain signal;
step 4: on the response frequency domain signal, selectSignal amplitude a corresponding to excitation frequency f 1 Signal amplitude a corresponding to excitation frequency 2f 2 Calculating to obtain nonlinear ultrasonic characterization parameter beta
Wherein, beta is nonlinear ultrasonic characterization parameter, unit: s;
f is the fundamental frequency of the excitation signal, unit: kHz;
A 1 signal amplitude corresponding to excitation frequency f, unit: dimensionless;
A 2 the unit is the signal amplitude corresponding to the excitation frequency 2 f: dimensionless;
l is the length of the solid propellant dumbbell test piece 4 in units: mm;
c is the longitudinal wave velocity of the excitation signal in the solid propellant dumbbell test piece 4, in units of: km/s; c=l/t; t is the initial time of acquiring the response time domain signal, and the unit is: us;
step 5: and (3) through carrying out an in-situ stretching experiment on the solid propellant dumbbell test piece 4, calculating nonlinear ultrasonic characterization parameters beta under different stretching displacements, and comparing the changes of beta to obtain the online characterization information of the dehumidification damage of the solid propellant dumbbell test piece 4 in the in-situ stretching process.
Specific experimental example
A nonlinear ultrasonic in-situ on-line detection characterization method for dehumidifying damage of a solid propellant comprises the following steps:
step 1: the length l=120 mm of the solid propellant dumbbell test piece 4 was measured;
step 2: construction of solid propellant dehumidifying damage nonlinear ultrasonic characterization system
The upper surface of the solid propellant dumbbell test piece 4 is coupled with an excitation piezoelectric wafer 3, and the lower surface is coupled with a collection piezoelectric wafer 5; the system also comprises a computer 1 provided with nonlinear ultrasonic in-situ on-line detection characterization software, wherein the computer 1 is connected with an excitation piezoelectric wafer 3 through a signal excitation device 2 and is connected with an acquisition piezoelectric wafer 5 through a signal acquisition device 6;
step 3: setting excitation frequency f=130 kHz by nonlinear ultrasonic in-situ online detection characterization software, giving a multicycle sine excitation signal with the excitation frequency of 130kHz to an excitation piezoelectric wafer 3 by using a signal excitation device 2, acquiring a response time domain signal on an acquisition piezoelectric wafer 5 by using a signal acquisition device 6, and carrying out Fourier transform on the response time domain signal to obtain a response frequency domain signal; according to the initial time t of the response time domain signal, calculating the longitudinal wave speed c=1.86 km/s of the excitation signal in the solid propellant dumbbell test piece 4 through c=l/t;
step 4: selecting a signal amplitude A corresponding to an excitation frequency of 130kHz from the response frequency domain signal 1 Signal amplitude A corresponding to excitation frequency of 260kHz 2 Calculating to obtain nonlinear ultrasonic characterization parameter beta=2.176×10 -6 s；
Step 5: as shown in fig. 2, an in-situ stretching experiment is carried out on the solid propellant dumbbell test piece 4, nonlinear ultrasonic characterization parameters beta are calculated under different stretching displacements, and the change of beta is compared to obtain the online characterization information of the dehumidification damage of the solid propellant dumbbell test piece 4 in the in-situ stretching process; from the graph, after the tensile displacement reaches 10.95mm, the beta value is suddenly changed, namely the solid propellant dumbbell test piece 4 generates the dehumidification damage, which indicates that the invention can effectively perform in-situ on-line detection and characterization on the dehumidification damage of the solid propellant.
Claims (2)
1. The nonlinear ultrasonic in-situ on-line detection characterization method of the solid propellant dehumidifying damage is characterized by comprising the following steps of:
step 1: measuring the length l of a solid propellant dumbbell test piece (4);
step 2: construction of solid propellant dehumidifying damage nonlinear ultrasonic characterization system
The upper surface of the solid propellant dumbbell test piece (4) is coupled with an excitation piezoelectric wafer (3), and the lower surface is coupled with a collection piezoelectric wafer (5); the system also comprises a computer (1) provided with nonlinear ultrasonic in-situ on-line detection characterization software, wherein the computer (1) is connected with the exciting piezoelectric wafer (3) through a signal exciting device (2) and is connected with the collecting piezoelectric wafer (5) through a signal collecting device (6);
step 3: setting an excitation frequency f through nonlinear ultrasonic in-situ online detection characterization software, giving an excitation signal with the excitation frequency f to an excitation piezoelectric wafer (3) by using a signal excitation device (2), acquiring a response time domain signal on an acquisition piezoelectric wafer (5) by using a signal acquisition device (6), and carrying out Fourier transform on the response time domain signal to obtain a response frequency domain signal;
step 4: selecting a signal amplitude A corresponding to the excitation frequency f on the response frequency domain signal 1 Signal amplitude a corresponding to excitation frequency 2f 2 Calculating to obtain nonlinear ultrasonic characterization parameter beta
Wherein, beta is nonlinear ultrasonic characterization parameter, unit: s;
f is the fundamental frequency of the excitation signal, unit: kHz;
A 1 signal amplitude corresponding to excitation frequency f, unit: dimensionless;
A 2 the unit is the signal amplitude corresponding to the excitation frequency 2 f: dimensionless;
l is the length of a solid propellant dumbbell test piece (4), and the unit is: mm;
c is the longitudinal wave velocity of the excitation signal in the solid propellant dumbbell test piece (4), and the unit is: km/s; c=l/t; t is the initial time of acquiring the response time domain signal, and the unit is: us;
step 5: and (3) carrying out an in-situ stretching experiment on the solid propellant dumbbell test piece (4), calculating nonlinear ultrasonic characterization parameters beta under different stretching displacements, and comparing the changes of beta to obtain the online characterization information of the dehumidification damage of the solid propellant dumbbell test piece (4) in the in-situ stretching process.
2. The method for characterizing nonlinear ultrasonic in-situ online detection of dehumidification damage of a solid propellant according to claim 1, wherein the method comprises the following steps: the excitation signal is a multicycle sinusoidal excitation signal.
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| FR2285611A1 (en) * | 1974-09-17 | 1976-04-16 | Poudres & Explosifs Ste Nale | Non destructive testing of propellant charge - to determine onset and progress of damage e.g. development of voids and cracks |
| CN107843552A (en) * | 2017-03-17 | 2018-03-27 | 湖北航天化学技术研究所 | The quantitative detecting method of filler grain and basal body interface dehumidification after propellant moisture absorption |
| CN107917958A (en) * | 2017-11-03 | 2018-04-17 | 河南工业大学 | Utilize the anti-phase method to rayleigh waves inspection material surface micro-damage |
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- 2021-11-01 CN CN202111281900.4A patent/CN114062493B/en active Active
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|---|---|---|---|---|
| US3534590A (en) * | 1966-10-06 | 1970-10-20 | Imp Metal Ind Kynoch Ltd | Ultrasonic testing apparatus and method |
| FR2285611A1 (en) * | 1974-09-17 | 1976-04-16 | Poudres & Explosifs Ste Nale | Non destructive testing of propellant charge - to determine onset and progress of damage e.g. development of voids and cracks |
| CN107843552A (en) * | 2017-03-17 | 2018-03-27 | 湖北航天化学技术研究所 | The quantitative detecting method of filler grain and basal body interface dehumidification after propellant moisture absorption |
| CN107917958A (en) * | 2017-11-03 | 2018-04-17 | 河南工业大学 | Utilize the anti-phase method to rayleigh waves inspection material surface micro-damage |
| CN110243941A (en) * | 2019-07-08 | 2019-09-17 | 西安航天化学动力有限公司 | A kind of lossless detection method of solid propellant rocket interfacial detachment defect |
Non-Patent Citations (1)
| Title |
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| 复合固体推进剂脱湿研究进展;刘新国;刘佩进;强洪夫;;固体火箭技术(第03期);全文 * |
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