CN102507736A - Nondestructive testing method of paste quality of marine constrained damping rubber plate - Google Patents
Nondestructive testing method of paste quality of marine constrained damping rubber plate Download PDFInfo
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- CN102507736A CN102507736A CN2011103452115A CN201110345211A CN102507736A CN 102507736 A CN102507736 A CN 102507736A CN 2011103452115 A CN2011103452115 A CN 2011103452115A CN 201110345211 A CN201110345211 A CN 201110345211A CN 102507736 A CN102507736 A CN 102507736A
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Abstract
The invention provides a nondestructive testing method of paste quality of a marine constrained damping rubber plate, which solves the problem that only interface paste quality between a thinner steel plate and a thinner damping rubber plate can be effectively detected during back multi-layer rubber interface paste quality detection of a steel plate by adopting a multi-pulse echo method. The nondestructive testing method comprises the steps of: 1, conditioning a signal, 2, meshing, 3, collecting a detection signal, 4, collecting a contrast signal, 5, drawing an extreme envelope, and 6, judging. The nondestructive testing method, provided by the invention, fills the blank of the nondestructive testing method of paste quality of the constrained damping rubber plate and a metal base body in domestic marine industry at present, can carry out 100% of nondestructive testing as to interface debonding situation of a constrained plate, a damping material and a metal plate, and have the advantages of good repeatability, high reliability, large economic benefit and social benefit; and the detection result is not affected by experience and levels of testing staff.
Description
Technical field
The invention belongs to lossless detection method, the lossless detection method of particularly a kind of damping-constraining rubber slab peculiar to vessel and metallic matrix sticking Quality is used for the detection of damping-constraining rubber slab sticking Quality peculiar to vessel.
Background technology
In the ship ' s equipment process, the damping rubber material can be installed to reduce the structural vibrations noise by general assembly factory on Ship Structure at present.Bonding defect when the damping rubber material lays directly has influence on its laying quality and result of use thereof.Ceng You researchist based on the resonance matching theory, attempts detecting steel plate multilayer rubber interface unsticking behind with square-wave frequency modulation multiple-pulse echo method in the research of " steel plate is multilayer rubber debonding interface train of impulses echo analysis behind ".This method has only been studied sheet steel (4mm) and TR thin rubber layer (0～5mm) bonded structure, but not mentioned to the detection validity greater than steel plate Yu the thicker building rubber compound of 4mm thickness.
Summary of the invention
The present invention provides a kind of lossless detection method of damping-constraining rubber slab sticking Quality peculiar to vessel, solves to adopt the multiple-pulse echo method to carry out the problem that multilayer rubber interface, steel plate behind sticking Quality detects interface sticking Quality between the damping rubber blanket that can only effectively detect thin steel plate and approach.
The lossless detection method of a kind of damping-constraining rubber slab sticking Quality peculiar to vessel of the present invention may further comprise the steps:
The first step: ultrasonic testing system is carried out instrument connect; Parameter to ultra-sonic defect detector and digital oscilloscope is regulated; Make a Bottom echo height of damping-constraining rubber slab moderate, regulate SF and make the data of collection can record the multiple back reflection of metallic matrix;
Second step: damping-constraining rubber slab specimen surface is divided square net;
Wherein square net nodal pitch L=2mm～10mm obtains N node, and N=[a/L] * [b/L], a, b are respectively the length of sound eliminating tile and wide, the mm of unit, and [.] expression is to the numerical value round in [.].
The 3rd step: the compressional wave normal probe of centre frequency directly is coupling on the square net of damping-constraining rubber slab specimen surface; Along mesh lines damping-constraining rubber slab sample is scanned line by line; Gather echoed signal on each node; Through ultra-sonic defect detector echoed signal on the node and corresponding node position are sent into computing machine, obtain N detection signal;
The 4th step: keep under the state of ultra-sonic defect detector and digital oscilloscope parameter constant the compressional wave normal probe being coupling in the control sample surface, gather the lip-deep echoed signal of control sample and send into computing machine, obtain 1 contrast signal;
Wherein control sample is formed by a good damping-constraining rubber slab and the sheet metal splicing of bonding.
The 5th step: computing machine reads in each detection signal damping-constraining rubber slab sample M time, the moment t of Bottom echo maximum value appearance
iWith moment t
iCorresponding maximum value amplitude P
i, i=1,2 ... M; The moment t that occurs with damping-constraining rubber slab sample Bottom echo maximum value is the x axle of rectangular coordinate system, and the maximum value amplitude P that t is corresponding constantly is the y axle of rectangular coordinate system, and (0,0) is the rectangular coordinate system initial point, (t
i, P
i) be the data point on the extreme value envelope in the rectangular coordinate system, the extreme value envelope at computer drawing detection signal corresponding node place obtains N extreme value envelope of damping-constraining rubber slab sample; With the extreme value envelope of same method computer drawing contrast signal, obtain the extreme value envelope of control sample;
The 6th step: computing machine is inserted N the extreme value envelope of damping-constraining rubber slab sample and the extreme value envelope of control sample in the same rectangular coordinate system; Observe the position relation of extreme value envelope of N extreme value envelope and the control sample of damping-constraining rubber slab sample respectively; If the extreme value envelope basically identical of 1 extreme value envelope of damping-constraining rubber slab sample and comparison sample; The node place that the corresponding damping-constraining rubber slab of this extreme value envelope sample then is described is bonding good; If 1 extreme value envelope of damping-constraining rubber slab sample is higher than the extreme value envelope of comparing sample, the node place unsticking of the corresponding damping-constraining rubber slab of this extreme value envelope sample is described then.
Beneficial effect of the present invention:
The present invention provides technical support for the requirement of " the actual bond area of every damping material should be not less than every total bond area 70% " that damping-constraining elastomeric material installation quality satisfies that GJB3045-97 " visco-elastic damping material general specification " clearly stipulates; Filled up the blank of the lossless detection method of present domestic naval vessel industry damping-constraining rubber slab and metallic matrix sticking Quality; Can be directed against restraining plate-damping material-sticking situation of sheet metal splicing emaciated face and implement 100% Non-Destructive Testing; Good reproducibility, reliability height; And not examined personnel's experience of testing result and level affects have bigger economic benefit and social benefit.
Description of drawings
Fig. 1 glueds joint the structural representation of sample for the damping-constraining rubber slab;
Fig. 2 is a ultrasonic testing system;
Fig. 3 glueds joint the extreme value envelope of sample and the extreme value envelope line chart of control sample for the damping-constraining rubber slab.
Embodiment
For making the object of the invention, technical scheme and advantage clearer; Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with technical scheme of the present invention; Provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Like Fig. 1, shown in 2, wherein retrain sheet metal 1, bonding region 2, damping material 3, sheet metal 4, unsticking zone 5, ultra-sonic defect detector 6, digital oscilloscope 7, compressional wave normal probe 8, the damping-constraining rubber slab glueds joint sample 9, computing machine 10.With a sectional dimension be 120 * 100mm D-803-Y type damping-constraining rubber slab (production of Tianjin rubber research institute) and the thick Q235 steel plate bonding of 5.5mm; Wherein two kinds of material surface of contact have 1/3 regional uncoated tackifier, and the damping-constraining rubber slab for preparing local unsticking glueds joint sample.D-803-Y type damping-constraining rubber slab and a Q235 base steel test block that is of a size of Φ 70mm * 5.5mm of being Φ 68mm with a sectional dimension bond fully, prepare control sample;
Embodiments of the invention comprise the steps:
1) Signal Regulation step
Parameter to ultra-sonic defect detector 6 and digital oscilloscope 7 is regulated, and makes a Bottom echo height of free damping rubber slab moderate, regulates SF and makes the data of collection can record the multiple back reflection of metallic matrix.Regulating the selected parameter in back is: CTS-32 ultra-sonic defect detector 9: gain is set to 46dB; The signal large buttons of DPO4032 digital oscilloscope are transferred to 1v; SI: 10 * 10
-6S; Collection all over the screen is counted: 10000;
2) divide the grid step
Square net is divided on damping-constraining rubber slab sample 9 surfaces, and square net nodal pitch L=2mm obtains 3000 nodes;
3) detection signal acquisition step
With centre frequency f
mThe compressional wave normal probe 8 of=2MHz directly is coupling on the square net of damping-constraining rubber slab sample bonded areas 2; Along mesh lines damping-constraining rubber slab sample is scanned line by line; Gather echoed signal on each node; Through ultra-sonic defect detector 6 echoed signal on the node and corresponding node position are sent into computing machine 10, obtain 2000 detection signals; Keep under the state of ultra-sonic defect detector 6 and digital oscilloscope 7 parameter constants; Compressional wave normal probe 8 is moved in the unsticking zone 5 of damping-constraining rubber slab sample according to above-mentioned steps; Grid on the unsticking zone scans line by line, obtains 1000 detection signals;
4) contrast signal acquisition step
Keep under the state of ultra-sonic defect detector 6 and digital oscilloscope 7 parameter constants compressional wave normal probe 8 being coupling on the control sample 9, gather the echoed signal on control sample surface, digital oscilloscope is sent echoed signal into computing machine 10, obtains 1 contrast signal;
5) extreme value envelope plot step
Computing machine reads the moment t that 7 Bottom echo maximum value of damping-constraining rubber slab sample occur in 2000 detection signals
iWith moment t
iCorresponding maximum value amplitude P
i, i=1,2 ... 7;
The moment t that occurs with damping-constraining rubber slab sample Bottom echo maximum value is the x axle of rectangular coordinate system, and the maximum value amplitude P that t is corresponding constantly is the y axle of rectangular coordinate system, and (0,0) is the rectangular coordinate system initial point, (t
i, P
i) be the data point on the extreme value envelope in the rectangular coordinate system, the extreme value envelope at computer drawing detection signal corresponding node place obtains the extreme value envelope of 2000 damping-constraining rubber slab samples; Fig. 3 has provided the extreme value envelope of one of them detection signal, sees curve a;
With same method; The extreme value envelope of 1000 detection signals in computer drawing damping-constraining rubber slab unsticking zone and the extreme value envelope of control sample obtain the extreme value envelope of 1000 damping-constraining rubber slab samples and the extreme value envelope of 1 control sample; Fig. 3 has provided the extreme value envelope of one of them detection signal, sees curve b; Fig. 3 has provided the extreme value envelope of control sample, sees curve j;
6) determination step
Computing machine is inserted 3000 the extreme value envelopes of damping-constraining rubber slab sample and the extreme value envelope of control sample in the same rectangular coordinate system, observes the position relation of extreme value envelope of 3000 extreme value envelopes and the control sample of damping-constraining rubber slab sample respectively;
As shown in Figure 3; Curve a representes that the damping-constraining rubber slab glueds joint the bonded areas detection signal extreme value envelope of sample; Curve b representes that the damping-constraining rubber slab glueds joint the unsticking zone detection signal extreme value envelope of sample, and curve j representes the extreme value envelope of control sample contrast signal.Observation can be known: the position basically identical of curve a and curve j, judge that thus the node place of the damping-constraining rubber slab sample that curve a is corresponding is bonding good; Curve b judges the node place unsticking of the damping-constraining rubber slab sample that curve b is corresponding thus apparently higher than curve j.
Claims (3)
1. the lossless detection method of a damping-constraining rubber slab sticking Quality peculiar to vessel is characterized in that, may further comprise the steps:
The first step: ultrasonic testing system is carried out instrument connect; Parameter to ultra-sonic defect detector and digital oscilloscope is regulated; Make a Bottom echo height of damping-constraining rubber slab moderate, regulate SF and make the data of collection can record the multiple back reflection of metallic matrix;
Second step: damping-constraining rubber slab specimen surface is divided square net;
The 3rd step: the compressional wave normal probe of centre frequency directly is coupling on the square net of damping-constraining rubber slab specimen surface; Along mesh lines damping-constraining rubber slab sample is scanned line by line; Gather echoed signal on each node; Through ultra-sonic defect detector echoed signal on the node and corresponding node position are sent into computing machine, obtain N detection signal;
The 4th step: keep under the state of ultra-sonic defect detector and digital oscilloscope parameter constant the compressional wave normal probe being coupling in the control sample surface, gather the lip-deep echoed signal of control sample and send into computing machine, obtain 1 contrast signal;
The 5th step: computing machine reads in each detection signal damping-constraining rubber slab sample M time, the moment t of Bottom echo maximum value appearance
iWith moment t
iCorresponding maximum value amplitude P
i, i=1,2 ... M; The moment t that occurs with damping-constraining rubber slab sample Bottom echo maximum value is the x axle of rectangular coordinate system, and the maximum value amplitude P that t is corresponding constantly is the y axle of rectangular coordinate system, and (0,0) is the rectangular coordinate system initial point, (t
i, P
i) be the data point on the extreme value envelope in the rectangular coordinate system, the extreme value envelope at computer drawing detection signal corresponding node place obtains N extreme value envelope of damping-constraining rubber slab sample; With the extreme value envelope of same method computer drawing contrast signal, obtain the extreme value envelope of control sample;
The 6th step: computing machine is inserted N the extreme value envelope of damping-constraining rubber slab sample and the extreme value envelope of control sample in the same rectangular coordinate system; Observe the position relation of extreme value envelope of N extreme value envelope and the control sample of damping-constraining rubber slab sample respectively; If the extreme value envelope basically identical of 1 extreme value envelope of damping-constraining rubber slab sample and comparison sample; The node place that the corresponding damping-constraining rubber slab of this extreme value envelope sample then is described is bonding good; If 1 extreme value envelope of damping-constraining rubber slab sample is higher than the extreme value envelope of comparing sample, the node place unsticking of the corresponding damping-constraining rubber slab of this extreme value envelope sample is described then.
2. the lossless detection method of a kind of damping-constraining rubber slab sticking Quality peculiar to vessel as claimed in claim 1; It is characterized in that wherein square net nodal pitch L=2mm～10mm obtains N node; N=[a/L] * [b/L]; A, b are respectively the length of sound eliminating tile and wide, the mm of unit, and [.] expression is to the numerical value round in [.].
3. according to claim 1 or claim 2 the lossless detection method of damping-constraining rubber slab sticking Quality a kind of peculiar to vessel is characterized in that wherein control sample is formed with a sheet metal splicing by a good damping-constraining rubber slab of bonding.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102998366A (en) * | 2012-12-18 | 2013-03-27 | 西安航天化学动力厂 | Ultrasonic testing method for bonding quality of coated steel sheet and rubber |
| CN103335852A (en) * | 2013-07-02 | 2013-10-02 | 无锡吉兴汽车声学部件科技有限公司 | Auxiliary grid tooling for automotive front barricading sound test |
| CN110308204A (en) * | 2019-07-05 | 2019-10-08 | 北京理工大学 | A kind of three-decker thin intermediate physical characteristic measurement method of parameters |
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| JP2005300286A (en) * | 2004-04-09 | 2005-10-27 | Mitsubishi Heavy Ind Ltd | Ultrasonic probe and ultrasonic measuring device |
| CN102087203A (en) * | 2010-11-19 | 2011-06-08 | 北京工业大学 | Ultrasonic wave measurement method for interface bonding stress in bonding structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998366A (en) * | 2012-12-18 | 2013-03-27 | 西安航天化学动力厂 | Ultrasonic testing method for bonding quality of coated steel sheet and rubber |
| CN103335852A (en) * | 2013-07-02 | 2013-10-02 | 无锡吉兴汽车声学部件科技有限公司 | Auxiliary grid tooling for automotive front barricading sound test |
| CN103335852B (en) * | 2013-07-02 | 2015-12-09 | 无锡吉兴汽车声学部件科技有限公司 | The auxiliary grid frock of automobile front wall sound insulation measurement |
| CN110308204A (en) * | 2019-07-05 | 2019-10-08 | 北京理工大学 | A kind of three-decker thin intermediate physical characteristic measurement method of parameters |
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