CN102890122A - Deformation damage evaluating system for hot-rolled and quenched 16-Mn steel bearing members based on acoustic emission and self-organized criticality theory - Google Patents
Deformation damage evaluating system for hot-rolled and quenched 16-Mn steel bearing members based on acoustic emission and self-organized criticality theory Download PDFInfo
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Abstract
The invention discloses a deformation damage evaluating system for hot-rolled and quenched 16-Mn steel bearing members based on acoustic emission and self-organized criticality theory. In the system, a primary waveform signal extracting unit (1) performs analogue-digital conversion on multiple sensed information Sn and then outputs acoustic emission waveform information fO(T); a deformation damage state waveform and self-organized criticality parameter analyzing unit (2) analyzes the acoustic emission waveform information fO(T), judges and outputs a deformation damage state waveform and self-organized criticality parameter matrix G=[fk(T), R, alpha]; and a deformation damage evaluating unit (3) evaluates the deformation damage state of the hot-rolled and quenched 16-Mn steel bearing members according to the matrix of G=[fk(T), R, alpha]m and outputs deformation damage state information C (G) to an early warning unit (4) for warning early. According to the invention, by monitoring the hot-rolled and quenched 16-Mn steel bearing members by using an acoustic emission technology, the deformation damage state information represented by the acoustic emission signals is obtained and the deformation damage state is evaluated.
Description
Technical field
The present invention relates to the appraisal procedure that a kind of bearing member to the different heat treatment state in the heavy mechanical equipment of harbour carries out the deformation faulted condition, more particularly, refer to a kind of based on acoustic emission and self-organization Critical Theory, the system that the deformation faulted condition of As rolled and quenching state 16 manganese steel (16Mn steel) bearing member is assessed.
Background technology
Bank equipment in the heavy mechanical equipment of harbour: such as ship loader, ship unloaders, grab claw etc., often use the 16Mn steel as crucial bearing member.Bank equipment in use for some time, as the deformation faulted condition of the 16Mn steel of main bearing member to causing material impact the serviceable life of whole bank equipment.
The 16Mn steel is a kind of low alloy steel that grows up in conjunction with china natural resources situation (manganese is the rich element that produces of China), is widely used.The 16Mn steel force-bearing part uses under the quenching structure state of be everlasting hot rolling microstructure state or heat-affected zone, welding position, after the regular hour, often some failure accidents can occur under arms, and the deformation damage is the one of the main reasons that causes its inefficacy.To make assessment to the deformation faulted condition of 16Mn steel force-bearing part under the different tissues state for this reason, in time, correctly estimate the faulted condition of 16Mn steel force-bearing part under the different tissues state, for its safe operation and life prediction provide foundation.
Acoustic emission (Acoustic Emission Technique) because of have dynamically, the advantage such as in real time detection, be widely used in the damage check of structure and member.Practice shows, damage in various degree can occur when being subjected to load material, and the variation of faulted condition can cause the acoustic emission waveform signal characteristic that a series of variations occur.For example the elasticity faulted condition can occur change the yield damaging state into being subjected to quiet tensile load to do the time spent, these faulted conditions change the variation that all will cause acoustic emission waveform signal amplitude, phase place, frequency; Therefore can utilize acoustic emission as the instrument of monitoring 16Mn steel force-bearing part deformation faulted condition.
The power regularity of distribution of acoustic emission signal amplitude (being that the frequency and the amplitude size that a certain amplitude acoustic emission signal occurs is the power relation) all is ubiquitous in a lot of physical processes, processes such as dislocation avalanche, Crack Extension, martensite phase transformation.In fact, the power of event yardstick distribution (is that a certain physical quantity is the power relation at certain yardstick frequency of occurrence P (X) and its scale size X: P (X)=X
-γ, wherein γ is the power profile exponent of this physical quantity) and form in fact extensively is present in nature, not only is confined to the microprocesses such as dislocation motion or phase transformation, in the natural processes such as earthquake, disaster, solar flare similar rule arranged.The power distribution form declarative procedure of this event yardstick is in complicated nonlinear critical conditions, generally is referred to as the self-organization critical conditions.Self-organization Critical Theory (being the information such as size distribution rule, profile exponent of physical quantity) is suitable for describing the state of these systems and plays predicting function.Different tissues state 16Mn steel different deformation damage process also belongs to the critical process of self-organization in various degree, so the acoustic emission amplitude in the deformation damage process also meets the power regularity of distribution.The power distribution coefficient of acoustic emission amplitude and profile exponent just can in conjunction with features such as acoustic emission waveforms, well be applied in the monitoring to different tissues state 16Mn steel deformation damage process.
Along with modern industry develops to extensive, high-level efficiency day by day, the large-scale bank crane tool as the important Logistics Equipment in harbour has following characteristics:
1, a lot of goliaths in using at present are the sixties in last century to the seventies of China's self design or from the Eastern Europe import, minority is the second-hand equipment from state's imports such as U.S., days in addition, considered by 20～25 years designed lives, also oneself enters be on active service later stage or extended active duty stage to a lot of equipment;
2, task is heavy, and along with production-scale expansion, the work of many cranes is increasingly heavy, and the situation of overload also happens occasionally;
3, the 16Mn steel of crane use exists different heat-treated sturctures such as the quenching state tissue of supply of material As rolled tissue and heat-affected zone, welding position, therefore causes the complicated various of faulted condition.
4, all there is in various degree limitation in present damage detecting method in the large-scale steel structure context of detection, the part sampling Detection of crane being carried out such as methods such as ultrasound examination and magnetic detections, blindness is large, it is long to be prone to the cycle undetected and that detect, and workload is large, somewhat expensive;
5, the early warning evaluating system is not perfect at present, the analysis and distinguishing technology of using at present can't be made accurately early warning and safety assessment to the deformation damage of crane bearing member, especially China harbour heavy mechanical equipment security incident happens occasionally, wherein, the tensile deformation damage that causes of overload is that one of main damage mode of heavy equipment bearing member is played on large-scale bank, harbour.
Therefore, for guaranteeing the safe and reliable operation of large-scale bank crane tool, must detect, judge the deformation faulted condition to the 16Mn steel force-bearing part of different tissues state, thereby carry out safety assessment.Acoustic emission and self-organization Critical Theory are then for realizing that this purpose provides technical method.
Summary of the invention
In order to reduce large-scale bank crane tool in use, because the loss that suddenly fracture of the 16Mn steel force-bearing part that the deformation damage causes causes, the present invention proposes a kind of employing acoustic emission different heat treatment structural state 16Mn steel force-bearing part is monitored, and obtains the deformation faulted condition information of acoustic emission deformation faulted condition waveform and self-organization critical parameters matrix representation.Use monitoring result of the present invention and can assess judgement to different heat treatment structural state 16Mn steel force-bearing part deformation faulted condition, thereby make early warning, reduce the losses such as equipment and casualties.
As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory of the present invention, this system is comprised of original waveform signal extraction unit (1), deformation faulted condition waveform and self-organization critical parameters analytic unit (2), deformation Damage condition evaluation unit (3) and prewarning unit (4);
Wherein, deformation faulted condition waveform and self-organization critical parameters analytic unit (2) are comprised of deformation faulted condition wave form analysis module (21), deformation faulted condition amplitude power distribution coefficient analysis module (22) and deformation faulted condition amplitude distribution index analysis module (23);
The multichannel heat transfer agent S of original waveform signal extraction unit (1) to receiving
nCarry out exporting the acoustic emission waveform information f after the analog to digital conversion
O(T);
Deformation faulted condition waveform and self-organization critical parameters analytic unit (2) are to the acoustic emission waveform information f
O(T) analyze, judge and output deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α];
Deformation Damage condition evaluation unit (3) is to deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] carry out As rolled and quenching state 16 manganese steel bearing member deformation Damage condition evaluations, and output deformation faulted condition information C (G) is to prewarning unit (4);
After prewarning unit (4) receives the warning enabling signal, trigger starting switch output prompt tone.
The As rolled and the quenching state 16 manganese steel bearing member deformation lesion assessment system advantages that the present invention is based on acoustic emission and self-organization Critical Theory are:
(A) the present invention adopts acoustic emission, extract acoustic emission waveform and parameter information, and in conjunction with the self-organization Critical Theory, by analyzing acoustic emission signal amplitude distribution situation, obtained the sign matrix of reflection As rolled and quenching state 16Mn steel force-bearing part deformation faulted condition.This method combines the information such as the waveform of acoustic emission signal and amplitude, has the characteristics of quantification, can make correct assessment by comprehensive and accurate deformation faulted condition to the 16Mn steel.
(B) the present invention utilizes acoustic emission, can carry out qualitative assessment to the deformation faulted condition that easily occurs in the 16Mn steel force-bearing part of different heat treatment state, be applicable to actual components, and can make assessment to As rolled and quenching state 16Mn steel force-bearing part deformation faulted condition more accurately.
(C) As rolled and quenching state 16Mn steel force-bearing part division and the evaluation of deformation faulted condition have been carried out.Can make the evaluation of deformation damage location, deformation degree of injury to the 16Mn steel force-bearing part of unknown deformation faulted condition simplely.
(D) use the present invention to carry out Real-Time Monitoring to the deformation damage of the 16Mn steel force-bearing part under the operating mode, therefore in time early warning when dangerous situation occurring can greatly reduce the loss of personnel's property, guarantees safety and economic benefit.
Description of drawings
Fig. 1 is the schematic diagram that Acoustic radiating instrument is connected with a plurality of sensors.
Fig. 2 stores in the Acoustic radiating instrument based on the As rolled of acoustic emission and self-organization Critical Theory and the structured flowchart of quenching state 16 manganese steel bearing member deformation lesion assessment systems.
Fig. 2 A is deformation faulted condition waveform of the present invention and self-organization critical parameters analytic unit structured flowchart.
Fig. 3 is acoustic emission waveform information schematic diagram.
Fig. 4 A is As rolled and quenching state 16 manganese steel bearing member elastoplastic Damage and sclerosis faulted condition waveform f among the present invention
A(T) schematic diagram.
Fig. 4 B is As rolled and quenching state 16 manganese steel bearing member yield damaging state waveform f among the present invention
B(T) schematic diagram.
Number in the figure: 1. original waveform signal extraction unit; 2. deformation faulted condition waveform and self-organization critical parameters analytic unit; 21. deformation faulted condition wave form analysis module; 22. deformation faulted condition amplitude power distribution coefficient analysis module; 23. deformation faulted condition amplitude distribution index analysis module; 3. deformation Damage condition evaluation unit; 4. prewarning unit.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention arranges a plurality of calibrate AE sensors by the bearing member at large-scale bank crane tool, and the output terminal of a plurality of calibrate AE sensors is connected with Acoustic radiating instrument respectively.This Acoustic radiating instrument is used As rolled and the quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory of the present invention to the multichannel heat transfer agent that receives and is processed, thereby the deformation faulted condition of measurand (bearing member of large-scale bank crane tool) is carried out qualitative assessment.Referring to shown in Figure 1, Acoustic radiating instrument respectively with calibrate AE sensor A, calibrate AE sensor B, calibrate AE sensor C ..., calibrate AE sensor N connects, and realizes collection to the multi-Channel Acoustic information of measurand by a plurality of calibrate AE sensors.
Described calibrate AE sensor is chosen the R15 sensor that PAC company produces.Its resonant frequency is 150kHz.
Described Acoustic radiating instrument is chosen the full digital acoustic emission system that PAC company produces.This acoustic emission system includes host computer system and DiSP system, and 16Mn steel deformation faulted condition quantitative evaluating system of the present invention is stored in the storer of host computer system.Every passage in this DiSP system has the signal sampling rate up to 2MHz.
Shown in Fig. 2, Fig. 2 A, in order to reduce large-scale bank crane tool in use, because adopting acoustic emission that As rolled and quenching state 16Mn steel force-bearing part are carried out the deformation faulted condition, the loss that the suddenly fracture of the As rolled that various deformation damage causes and quenching state 16Mn steel force-bearing part causes, the present invention advance assessment.As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory of the present invention include original waveform signal extraction unit 1, deformation faulted condition waveform and self-organization critical parameters analytic unit 2, deformation Damage condition evaluation unit 3 and prewarning unit 4.
In the present invention, deformation damage state assessment system adopts Matlab language (version 7.0) exploitation, operates in the processor of Acoustic radiating instrument.The present invention adopts digitized technological means As rolled and quenching state 16Mn steel force-bearing part to be carried out the qualitative assessment of deformation faulted condition, thereby realizes giving warning in advance to large-scale bank crane tool dangerous situation.
The below is elaborated to As rolled and the technological means of the employing of the unit in the quenching state 16 manganese steel bearing member deformation lesion assessment systems, the function of realization that the present invention is based on acoustic emission and self-organization Critical Theory respectively:
(1) the original waveform signal extraction unit 1
In the present invention, original waveform signal extraction unit 1 first aspect is used for receiving the heat transfer agent S of the deformation faulted condition that a plurality of acoustic emission transducers (also claiming sensor) export respectively
n, the multichannel heat transfer agent S of second aspect to receiving
nAfter carrying out analog to digital conversion, extract the acoustic emission waveform information f under every kind of faulted condition
O(T), the third aspect is with the acoustic emission waveform information f
O(T) export to deformation faulted condition waveform and parameter analytic unit 2.Described acoustic emission waveform information f
O(T) include the acoustic emission signal amplitude (
A
Max) and acoustic emission energy (
E
Max).
Described acoustic emission waveform information f
O(T) include many information such as amplitude in the acoustic emission signal waveform, frequency, phase place in, the concrete form of acoustic emission waveform information as shown in Figure 3.Be the voltage data point of a sensor output of per 0.0000005 second record shown in the figure, then plot this oscillogram, wherein T represents writing time, waveform f
O(T) with regard to the information of voltage of representative as the function of time.The acoustical vibration of receiving for multiple sensor is converted into voltage signal, and what difference is the different vibration sound source of finding out that can not be quantitative have, so the present invention adopts the double-spectrum analysis method to come signal source is carried out quantization signifying.
At 1 pair of multichannel heat transfer agent of original waveform signal extraction unit S
nExtract the acoustic emission waveform information f that obtains under every kind of deformation faulted condition
O(T) pass of institute's foundation is
In the formula, A represents heat transfer agent S
nAcoustic emission amplitude parameter, A
MinExpression heat transfer agent S
nAcoustic emission amplitude parameter in minimum value, A
MaxExpression heat transfer agent S
nAcoustic emission amplitude parameter in maximal value, E represents heat transfer agent S
nThe acoustic emission energy parameter, E
MinExpression sensor information S
nThe acoustic emission energy parameter in minimum value, E
MaxExpression heat transfer agent S
nThe acoustic emission energy parameter in maximal value.
(2) deformation faulted condition waveform and self-organization critical parameters analytic unit 2
Shown in Fig. 2, Fig. 2 A, in the present invention, deformation faulted condition waveform and self-organization critical parameters analytic unit 2 are comprised of deformation faulted condition wave form analysis module 21, deformation faulted condition amplitude power distribution coefficient analysis module 22 and deformation faulted condition amplitude distribution index analysis module 23;
21 pairs of acoustic emission waveform information f that receive of deformation faulted condition wave form analysis module
O(T) analyze judgement, determine faulted condition type of waveform f
k(T).Wherein, f
k(T) be certain specific waveforms type of determining according to known faulted condition waveform.
In the present invention, first kind waveform: for As rolled and quenching state 16Mn steel bomb Plastic Damage state, type of waveform is designated as f
A(T), shown in Fig. 4 A, it is characterized by and have higher peak signal magnitude of voltage, but rapidly decay of intensity, whole signal is the demblee form waveform.
In the present invention, Equations of The Second Kind waveform: for As rolled and quenching state 16Mn steel yield damaging state, type of waveform is designated as f
B(T), shown in Fig. 4 B, it is characterized by the peak signal magnitude of voltage lower, but decay is also relatively slow, the interior magnitude of voltage of whole signal time domain scope changes not obvious, and whole signal is the continuous type waveform.
In the present invention, the 3rd class waveform: for As rolled and quenching state 16Mn hardening of steel faulted condition, type of waveform is designated as f
C(T); f
C(T) waveform and f
A(T) waveform is identical.
22 pairs of acoustic emission waveform information f that receive of deformation faulted condition amplitude power distribution coefficient analysis module
O(T) carry out signal amplitude and extract, determine the deformation faulted condition amplitude power distribution coefficient R of faulted condition amplitude A.Wherein A is the acoustic emission amplitude, only gets the positive integer less than 100 in system of the present invention, the db of unit.The total n of the non-vanishing amplitude of all acoustie emission event numbers that detects, and be arranged as A according to the amplitude size
1, A
2... A
nAmplitude power distribution coefficient R is defined as
A wherein
jExpression A
1, A
2... A
nIn j amplitude size (j=1,2 ... n);
Represent the amplitude mean value size that all acoustie emission event numbers are non-vanishing, namely
P
jBe the logarithm frequency, i.e. P
j=log
10P (A
j), P (A wherein
j) the expression amplitude is A
jThe acoustie emission event number, dimensionless;
Expression logarithm frequency mean value, namely
Dimensionless.
23 pairs of acoustic emission waveform information f that receive of deformation faulted condition amplitude distribution index analysis module
O(T) carry out the extraction of signal amplitude, determine deformation faulted condition amplitude distribution index α.Amplitude distribution index wherein
Dimensionless.
By deformation faulted condition type of waveform f
k(T), deformation faulted condition amplitude power distribution coefficient R and deformation faulted condition amplitude distribution index α have consisted of reflection As rolled and quenching state 16Mn steel force-bearing part deformation faulted condition waveform and self-organization critical parameters matrix G=[f jointly
k(T), R, α], then with deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] pass to deformation Damage condition evaluation unit 3.
(3) deformation Damage condition evaluation unit 3
In the present invention, this deformation Damage condition evaluation unit 3 is according to the deformation faulted condition waveform and the self-organization critical parameters matrix G=[f that receive
k(T), R, α], and it is made evaluation: occur in As rolled or quenching state 16Mn steel position and the damage extent of injury according to the deformation damage and vary in size the deformation damage is divided into different conditions, as deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] middle f
k(T)=f
i(T), R ∈ R
iAnd α ∈ α
iThe time, then be assessed as deformation faulted condition C (G)=i.
Wherein, C (G) is deformation faulted condition information, and i is deformation faulted condition type, and namely the deformation faulted condition of this deformation damage is the i class;
f
i(T) be the specific acoustic emission waveform type of i class deformation damage, namely during deformation faulted condition C (G)=i, f arranged
k(T)=f
i(T);
R
iBe the special deformation faulted condition amplitude power distribution coefficient of i class deformation damage, namely during deformation faulted condition C (G)=i, R ∈ R arranged
i
α
iBe the special deformation faulted condition amplitude distribution index of i class deformation damage, namely during deformation faulted condition C (G)=i, α ∈ α arranged
i
As deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] do not satisfy state evaluation condition f
k(T)=f
i(T), R ∈ R
iAnd α ∈ α
iThe time, rejected as the open country value.
This deformation faulted condition information C (G) starts prewarning unit 4 as early warning information and carries out early warning.
The criteria for classifying example of As rolled and quenching state 16Mn steel force-bearing part deformation faulted condition can be joined and is shown in Table 1, and all information in this table 1 are stored in the main frame of Acoustic radiating instrument.
Table 1 As rolled and quenching state 16Mn steel force-bearing part deformation damage state assessment exemplary standard
(4) prewarning unit 4
This prewarning unit 4 adopts the prompt tone warning output such as forms such as loudspeaker, loudspeakers.
In the present invention, after prewarning unit 4 receives the warning enabling signal, trigger starting switch output prompt tone.This prompt tone can be as loudspeaker, loudspeaker etc. send such as musical sound.
Embodiment 1:Bearing member to 40 tons of locomotive cranes carries out acoustic emission detection, and this bearing member mainly is made of As rolled 16Mn steel, and comprises the welding position, has the quenching state tissue.
Bearing member: cantilever is degree of stretching 5000mm effectively, detects length 3000mm.
The used 16Mn composition of steel of bearing member sees Table 2:
Table 2 16Mn composition of steel content
| Composition | C | Mn | Si | P | S | Ca | Fe |
| Mass percentage content (%) | 0.16 | 1.42 | 0.31 | 0.022 | 0.033 | 0.10 | Surplus |
Detection has with equipment: (A) 6 R15 type calibrate AE sensors, response frequency 100～400kHz, centre frequency 150kHz.
(B) Acoustic radiating instrument is U.S. PAC company full digital 16 passage DiSP acoustic emission systems.Threshold value 30dB when Acoustic radiating instrument detects, acoustic emission peak value definition time PDT is 300 μ s, and acoustic emission bump limiting time HDT is 600 μ s, and acoustic emission bump blocking time HLT is 1000 μ s.
Bearing in the stretching static load process of 16Mn steel force-bearing part, at first acoustic emission waveform information is collected, and by the present invention the deformation faulted condition is made an appraisal.The part 16Mn steel force-bearing part deformation faulted condition qualitative assessment of randomly drawing the results are shown in Table 3.
Table 3 part 16Mn steel force-bearing part deformation faulted condition qualitative assessment result
Can find out that from the assessment result of table 3 deformation faulted condition type of waveform is f the deformation faulted condition waveform and self-organization critical parameters matrix of selected acoustic emission waveform information
B(T), deformation faulted condition amplitude power distribution coefficient is all greater than 0.95, and deformation faulted condition amplitude distribution index all between 1.1-1.3, therefore all belongs to the yield damaging state of quenching state 16Mn steel.Illustrate that this bearing member may the deformation at yield damage occur in the heat-affected zone, welding position, may have the overload operation, have certain risk, should reach alarm and note Inspection and maintenance.
The present invention has set up the system that As rolled and quenching state 16Mn steel force-bearing part is carried out the deformation damage state assessment based on acoustic emission and self-organization Critical Theory, by acoustic emission to monitoring at labour 16Mn steel force-bearing part, obtain the deformation parameter of damage state information such as acoustic emission waveform, amplitude, and calculate amplitude power distribution coefficient and profile exponent, evaluate the deformation faulted condition.Use the present invention and can carry out to the 16Mn steel force-bearing part deformation faulted condition of different heat treatment structural state directly perceived, quantitative, real-time assessment judgement, thereby make early warning, reduce the losses such as equipment and casualties.
Claims (5)
1. As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and a self-organization Critical Theory, it is characterized in that: this system is comprised of original waveform signal extraction unit (1), deformation faulted condition waveform and self-organization critical parameters analytic unit (2), deformation Damage condition evaluation unit (3) and prewarning unit (4);
Wherein, deformation faulted condition waveform and self-organization critical parameters analytic unit (2) are comprised of deformation faulted condition wave form analysis module (21), deformation faulted condition amplitude power distribution coefficient analysis module (22) and deformation faulted condition amplitude distribution index analysis module (23);
The multichannel heat transfer agent S of original waveform signal extraction unit (1) to receiving
nCarry out exporting the acoustic emission waveform information f after the analog to digital conversion
O(T);
Deformation faulted condition waveform and self-organization critical parameters analytic unit (2) are to the acoustic emission waveform information f
O(T) analyze, judge and output deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α];
Deformation Damage condition evaluation unit (3) is to deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] carry out As rolled and quenching state 16 manganese steel bearing member deformation Damage condition evaluations, and output deformation faulted condition information C (G) is to prewarning unit (4);
After prewarning unit (4) receives the warning enabling signal, trigger starting switch output prompt tone.
2. As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory according to claim 1 is characterized in that: original waveform signal extraction unit (1) first aspect is used for receiving the heat transfer agent S of the deformation faulted condition that a plurality of acoustic emission transducers export respectively
n, the multichannel heat transfer agent S of second aspect to receiving
nAfter carrying out analog to digital conversion, extract the acoustic emission waveform information f under every kind of faulted condition
O(T), the third aspect is with the acoustic emission waveform information f
O(T) export to deformation faulted condition waveform and parameter analytic unit (2); Described acoustic emission waveform information f
O(T) include the acoustic emission signal amplitude (
A
Max) and acoustic emission energy (
E
Max).
3. As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory according to claim 2 is characterized in that: at original waveform signal extraction unit (1) to multichannel heat transfer agent S
nExtract the acoustic emission waveform information f that obtains under every kind of deformation faulted condition
O(T) pass of institute's foundation is
4. As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory according to claim 1 is characterized in that:
The acoustic emission waveform information f of deformation faulted condition wave form analysis module (21) to receiving
O(T) analyze judgement, determine faulted condition type of waveform f
k(T); Wherein, f
k(T) be the specific waveforms type of determining according to known faulted condition waveform;
First kind waveform: for As rolled and quenching state 16Mn steel bomb Plastic Damage state, type of waveform is f
A(T), it is characterized by and have higher peak signal magnitude of voltage, but rapidly decay of intensity, whole signal is the demblee form waveform;
The Equations of The Second Kind waveform: for As rolled and quenching state 16Mn steel yield damaging state, type of waveform is f
B(T), it is characterized by the peak signal magnitude of voltage lower, but decay is also relatively slow, the interior magnitude of voltage of whole signal time domain scope changes not obvious, and whole signal is the continuous type waveform;
The 3rd class waveform: for As rolled and quenching state 16Mn hardening of steel faulted condition, type of waveform is f
C(T); f
C(T) waveform and f
A(T) waveform is identical;
The acoustic emission waveform information f of deformation faulted condition amplitude power distribution coefficient analysis module (22) to receiving
O(T) carry out signal amplitude and extract, determine the deformation faulted condition amplitude power distribution coefficient R of faulted condition amplitude A; The total n of the non-vanishing amplitude of all acoustie emission event numbers that detects, and be arranged as A according to the amplitude size
1, A
2... A
nAmplitude power distribution coefficient R is defined as
A wherein
jExpression A
1, A
2... A
nIn j amplitude size (j=1,2 ... n);
Represent the amplitude mean value size that all acoustie emission event numbers are non-vanishing, namely
P
jBe the logarithm frequency, i.e. P
j=log
10P (A
j), P (A wherein
j) the expression amplitude is A
jThe acoustie emission event number, dimensionless;
Expression logarithm frequency mean value, namely
Dimensionless;
The acoustic emission waveform information f of deformation faulted condition amplitude distribution index analysis module (23) to receiving
O(T) carry out the extraction of signal amplitude, determine deformation faulted condition amplitude distribution index α; Amplitude distribution index wherein
Dimensionless;
By deformation faulted condition type of waveform f
k(T), deformation faulted condition amplitude power distribution coefficient R and deformation faulted condition amplitude distribution index α have consisted of reflection As rolled and quenching state 16Mn steel force-bearing part deformation faulted condition waveform and self-organization critical parameters matrix G=[f jointly
k(T), R, α].
5. As rolled and quenching state 16 manganese steel bearing member deformation lesion assessment systems based on acoustic emission and self-organization Critical Theory according to claim 1 is characterized in that: deformation faulted condition waveform and self-organization critical parameters matrix G=[f that this deformation Damage condition evaluation unit (3) basis receives
k(T), R, α], and it is made evaluation: occur in As rolled or quenching state 16Mn steel position and the damage extent of injury according to the deformation damage and vary in size the deformation damage is divided into different conditions, as deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] middle f
k(T)=f
i(T), R ∈ R
iAnd α ∈ α
iThe time, then being assessed as deformation faulted condition C (G)=i, C (G) is deformation faulted condition information, and i is deformation faulted condition type, and namely the deformation faulted condition of this deformation damage is the i class;
f
i(T) be the specific acoustic emission waveform type of i class deformation damage, namely during deformation faulted condition C (G)=i, f arranged
k(T)=f
i(T);
R
iBe the special deformation faulted condition amplitude power distribution coefficient of i class deformation damage, namely during deformation faulted condition C (G)=i, R ∈ R arranged
i
α
iBe the special deformation faulted condition amplitude distribution index of i class deformation damage, namely during deformation faulted condition C (G)=i, α ∈ α arranged
i
As deformation faulted condition waveform and self-organization critical parameters matrix G=[f
k(T), R, α] do not satisfy state evaluation condition f
k(T)=f
i(T), R ∈ R
iAnd α ∈ α
iThe time, rejected as the open country value.
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|---|---|---|---|
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|---|---|---|---|
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| US20060032313A1 (en) * | 2004-06-04 | 2006-02-16 | Austin Russell K | Distributed mode system for real time acoustic emission monitoring |
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| CN102072939A (en) * | 2010-12-09 | 2011-05-25 | 北京航空航天大学 | System based on acoustic emission for evaluating deformation and damage of in-service 16 manganese steel force-bearing component under two-dimensional stress and three-dimensional stress |
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| US20060032313A1 (en) * | 2004-06-04 | 2006-02-16 | Austin Russell K | Distributed mode system for real time acoustic emission monitoring |
| CN101726750A (en) * | 2009-11-30 | 2010-06-09 | 中国矿业大学(北京) | 'Three-map method' for evaluating ground fissures |
| CN101762634A (en) * | 2009-12-31 | 2010-06-30 | 北京航空航天大学 | In-service 16Mn steel load-bearing member deformation damage condition characteristic and quantitative evaluation system based on double-spectrum analysis |
| CN102072939A (en) * | 2010-12-09 | 2011-05-25 | 北京航空航天大学 | System based on acoustic emission for evaluating deformation and damage of in-service 16 manganese steel force-bearing component under two-dimensional stress and three-dimensional stress |
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| M. SHAIRA ET.AL.: "Evaluation of the strain-induced martensitic transformation by acoustic emission monitoring in 304L austenitic stainless steel: Identification of the AE signature of the martensitic transformation and power-law statistics", 《MATERIALS SCIENCE AND ENGINEERING A》 * |
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