CN110132122A - Solid rocket motor grain strain measurement method based on the big strain transducer of Grazing condition - Google Patents
Solid rocket motor grain strain measurement method based on the big strain transducer of Grazing condition Download PDFInfo
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- CN110132122A CN110132122A CN201910435205.5A CN201910435205A CN110132122A CN 110132122 A CN110132122 A CN 110132122A CN 201910435205 A CN201910435205 A CN 201910435205A CN 110132122 A CN110132122 A CN 110132122A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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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
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
Abstract
The invention discloses a kind of solid rocket motor grain strain measurement methods based on the big strain transducer of Grazing condition, specifically include: preparing the big strain transducer of Grazing condition that elasticity modulus is less than powder column；The big strain transducer of n Grazing condition is divided into multiple groups, the big strain transducer of each group Grazing condition is axially uniformly pasted on the blast tube surface at powder column center along powder column, and extraction electrode is adhered to blast tube surface, connect with external sensing data processing system；It acquires the resistivity measurements of the big strain transducer of each Grazing condition in real time using sensing data processing system, referring to strain-resistance variation characteristic, obtains powder column in the strain value of the big strain transducer corresponding position of Grazing condition, to obtain the strain of powder column.The present invention uses the big strain transducer of Grazing condition with low elastic modulus, large strain journey, can comply with the big strain of powder column, realizes the big strain long-time real-time measurement of solid rocket motor grain, improves measurement accuracy, reduces measurement cost.
Description
Technical field
The invention belongs to solid engines technical fields, are related to a kind of solid rocket motor grain strain measurement method, especially
It is related to a kind of solid rocket motor grain strain measurement method based on the big strain transducer of Grazing condition.
Background technique
Rocket solid engine is the most important core component of aerospace, and the method batch for generalling use horizontal rest is long
Phase storage.Solid engines enclosure interior is filled with hollow circuit cylinder bodily form powder column (being made of propellant and a small amount of additive), by
There is viscoplasticity (elasticity modulus≤3MPa) in propellant, when engine fixed pose is stood for a long time, powder column can be made in gravity
With lower generation bending strain, in addition, powder column is also also easy to produce uncertain strain during long distance transportation.It is fixed to take at present
Phase, which adjusts the method that solid engines place posture, which weakens powder column strain, influences, and needs regular sampling Detection, as ground igniting,
The reliability of flight test or decomposition run research solid engines, economy, human cost are higher.Therefore, start in solid
Placement sensor is monitored powder column strain in machine, is the novel means for realizing engine health and life appraisal, has weight
The application value wanted.
To realize the monitoring of solid engines internal strain, people are used in the preset fiber-optic grating sensor of engine interior
Method.Such as Chinese patent (publication number CN108194229A) discloses a kind of intelligent solid propellant rocket composite material casing
Production method.Fiber-optic grating sensor is placed in solid rocket motor case structure, solid-rocket is started with realizing
The real-time monitoring of machine enclosure interior strain and defect damage.But the patent is only capable of monitoring engine shell body strain, is not implemented to hair
The powder column of low elastic modulus carries out strain monitoring in motivation.For another example Chinese patent (publication number CN106840012A) discloses one kind
Strengthen the hair powder charge II interface strain measurement method based on grating sensing technique.Optical fiber Bragg grating sensor is preset at II circle
Face is simultaneously contacted with the full surface of boundary material, calculates monitoring point input optical wavelength and reflecting light that fiber-optic grating sensor obtains
Wavelength difference value obtains II interface strain.But the integral, flexible modulus of fiber-optic grating sensor is greater than propellant, can not be suitable with powder column
It should be bonded, therefore, it is difficult to realize to the big strain of low modulus powder column and high-precision measurement.
In conclusion needing a kind of high-precision, the measurement method of the big strain of long-time real-time measurement solid rocket motor grain.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of solid rocket motor grain based on the big strain transducer of Grazing condition
Strain measurement method can comply with powder column using the big strain transducer of Grazing condition with low elastic modulus, large strain journey
Big strain, realizes the big strain long-time real-time measurement of solid rocket motor grain, improves measurement accuracy, reduces measurement cost, for hair
Motivation health and life appraisal provide reliable basis, solve problems of the prior art.
The technical scheme adopted by the invention is that a kind of solid rocket motor grain based on the big strain transducer of Grazing condition is answered
Become measurement method, specifically follow the steps below:
S1 prepares the big strain transducer of Grazing condition that elasticity modulus is less than powder column, and the big strain transducer of Grazing condition includes sensitive layer,
The outside of sensitive layer is enclosed with flexible package layer, and sensitive layer is connect with extraction electrode；Demarcate the big strain transducer of each Grazing condition
Strain-resistance variation characteristic；
The big strain transducer of n Grazing condition is divided into multiple groups, wherein n >=12 by S2, and the big strain transducer of each group Grazing condition is along powder column
The axial blast tube surface for being uniformly pasted on powder column center is located at the same of blast tube with the big strain transducer of Grazing condition is organized
It radial section and is uniformly distributed along the circumferential direction of blast tube；The big strain transducer bottom of Grazing condition and blast tube surface are complete
Contact, extraction electrode is adhered to blast tube surface, and stretches out solid engines shell along powder column axial direction, with external biography
The connection of sensor data processing system；The initial resistance value of the big strain transducer of each Grazing condition is recorded respectively；
S3 acquires the resistance of the big strain transducer of each Grazing condition using sensing data processing system in real time according to certain frequency
Measured value obtains powder column in the big strain transducer of Grazing condition and corresponds to position referring to the strain-resistance variation characteristic demarcated in step S1
The strain value set, to obtain the strain of powder column.
Further, the step S3 is further comprising the steps of: corresponding to position in the big strain transducer of Grazing condition according to powder column
The strain value set obtains the internal strain of powder column using calculating simulation method；Detailed process are as follows: it is assumed that in solid engines shell
Surface and powder column outer surface, according to the strain value of blast tube surface distributed point, obtain powder column inner surface and exist without being detached from and deforming
Initial and the deformation latter two moment size, establishes the three-dimensional finite element model of powder column, in conjunction with the mechanical property of powder column, limited
Analog drug column is calculated in meta software by the internal strain of original state to measuring state.
Further, in the step S1, integral, flexible modulus≤3MPa of the big strain transducer of Grazing condition, strain measurement
Range 0 ~ 40%.
Further, in the step S2, the big strain transducer of Grazing condition is divided into 3 groups, is arranged in powder column along axial length
At 1/4,1/2 and the 3/4 of degree, the big strain transducer of Grazing condition that a radial section of blast tube is uniformly distributed circumferentially
Quantity is no less than 4.
Further, in the step S1, the cross sectional dimensions of the big strain transducer of Grazing condition is no more than long 10mm × wide
5mm, thickness≤3mm of the big strain transducer of Grazing condition, with the flexible package layer contacted at the top and bottom of sensitive layer with a thickness of quick
Feel the 1/2 of thickness degree.
Further, in the step S2, the big strain transducer bottom of Grazing condition, extraction electrode are viscous with blast tube respectively
Bonding agent used by connecing is identical as the bonding agent of propellant in powder column.
Further, in the step S1, sensitive layer uses redox graphene-polyimide foam, reduction-oxidation
Graphene is attached on polyimide foam.
Further, in the step S1, flexible package layer uses dimethyl silicone polymer or Ecoflex 00-30.
Further, in the step S1, extraction electrode is fixedly connected by conductive nano elargol layer with sensitive layer.
Further, in the step S3, the data acquiring frequency of sensing data processing system is 1Hz-100Hz.
The invention has the advantages that the present invention is big by using the Grazing condition with low elastic modulus, large strain journey
Strain transducer can comply with the big strain of powder column, to powder column machine itself during measuring solid rocket motor grain strain
Tool characteristic is nearly free from influence；Realize solid engines stand during storage to the high-precision of the big strain of powder column, it is long when
Between real-time measurement, reduce measurement cost, provide reliable basis for engine health and life appraisal, improve solid engines medicine
The service life of column.
The big strain transducer of Grazing condition is bonded in the blast tube with powder column center by the present invention, due to powder column peripheral surface
Upper and lower side is contacted with solid engines shell, has certain support, cannot reflect the influence of gravity completely, and blast tube
Unbraced structure, the deformation for being affected by gravity generation is maximum, and the miniature deformation inside powder column, which is conducted to blast tube surface, to be generated
Amplification effect, therefore, be monitored to grain deformation has more importantly meaning in the position.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the big strain transducer schematic diagram of Grazing condition of the present invention.
Fig. 2 is the arrangement perspective view of the big strain transducer of Grazing condition of the present invention.
Fig. 3 is the solid rocket motor grain strain measurement hardware diagrammatic cross-section of the big strain transducer of Grazing condition of the present invention.
Fig. 4 is the emergent property curve of Grazing condition hair strain transducer of the present invention.
In figure, 1, sensitive layer, 2, extraction electrode, 3, conductive nano elargol layer, 4, flexible package layer, 5, the big strain of Grazing condition
Sensor, 6, solid engines shell, 7, powder column, 8, blast tube, 9, jet pipe, 10, sensing data processing system.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
A kind of solid rocket motor grain strain measurement method based on the big strain transducer of Grazing condition, specifically according to following step
It is rapid to carry out:
S1 prepares the big strain transducer 5 of Grazing condition, as shown in Figure 1, by sensitive layer 1, extraction electrode 2 and conductive nano elargol layer 3
It is constituted with flexible package layer 4, the outside of sensitive layer 1 is enclosed with flexible package layer 4, and sensitive layer 1 is connect with extraction electrode 2；Calibration
Strain-resistance variation characteristic of each big strain transducer 5 of Grazing condition.
Integral, flexible modulus≤3MPa of the big strain transducer 5 of Grazing condition, strain measurement range reach 0 ~ 40%, realization pair
The strain greatly of powder column 7 is monitored；The elasticity modulus of the big strain transducer 5 of Grazing condition is less than powder column 7, thus has Grazing condition, low
Modulus properties, can comply with 7 inner surface of powder column for being bonded same low elastic modulus, improve measurement accuracy, precision (i.e. sensor
Measurement error)≤5%.
After the completion of S2, the casting of powder column 7 of solid engines and heat preservation solidification, the big strain transducer 5 of n Grazing condition is divided it is
Multiple groups, wherein n >=12, the big strain transducer 5 of each group Grazing condition are logical along the axial combustion gas for being uniformly pasted on 7 center of powder column of powder column 7
8 surface of road is located at the same radial section of blast tube 8 and along the week of blast tube 8 with the big strain transducer 5 of Grazing condition is organized
To being uniformly distributed；Big 5 bottom of strain transducer of Grazing condition and 8 surface of blast tube completely attach to, and extraction electrode 2 is adhered to combustion gas
8 surface of channel, and solid engines shell 6 is stretched out along 7 axial direction of powder column, connect with external sensing data processing system 10
It connects, one end of blast tube 8 is equipped with jet pipe 9；The initial resistance value of the big strain transducer 5 of each Grazing condition is recorded respectively.
Big 5 axial spacing of strain transducer of two adjacent groups Grazing condition can be adjusted according to the health monitoring demand of powder column 7,
It can be optimized according to strain measurement demand, the strain value of measurement core region-of-interest.With the two neighboring big strain of Grazing condition of group
The circumferential spacing of sensor 5 is determined according to the size of blast tube 8；Number of sensors crosses major general's limitation to solid rocket motor grain
The monitoring accuracy of the strain in 7 same regions.If setting annular for the big strain transducer 5 of Grazing condition, powder column 7 can be only provided
Circumferential overall strain, can not strain at the circumferential different location of fine-resolution powder column 7；The big strain transducer 5 of Grazing condition of the present invention is adopted
It is bonded, is improved a little or the precision of zonule strain measurement with distribution.
Thickness≤3mm of the big strain transducer 5 of Grazing condition greatly reduces the influence generated to 7 mechanical property of powder column, can
Comply with deformation；Contacted at the top and bottom of flexible package layer 4 and sensitive layer 1 with a thickness of the 1/2 of 1 thickness of sensitive layer, excessively thin is soft
Property encapsulated layer 4 be easily damaged in sensor drawing process, such as only cover 1 surface of sensitive layer, due to 4 material of flexible package layer
It is different with extensibility with the elasticity modulus of foam used in sensitive layer 1, therefore tearable flexible package when strain transducer Tensile
Layer 4；And blocked up flexible package layer 4 increases the elasticity modulus of sensor entirety, by the mechanical property to powder column 7 and should sell of one's property
Raw interference also will affect the compliance of Grazing condition big strain transducer 5 and powder column 7.
The cross sectional dimensions of the big strain transducer 5 of Grazing condition is not more than long 10mm × wide 5mm, the big strain transducer of Grazing condition
5 size is smaller, be adapted for placement in blast tube 8, and there is low cost compared to fibre optical sensor etc., can distribution measuring
Advantage；Arrangement quantity in blast tube 8 can increase according to demand, due to the ruler of the big strain transducer 5 of n Grazing condition
It is very little, performance is consistent, quantity in measurement process or layout density change do not need to redesign measuring device, only adjust
The processing circuit of the output connection of extraction electrode 2, versatility is preferable, easy to operate, scalability is strong.
Bonding agent used by big 5 bottom of strain transducer of Grazing condition, extraction electrode 2 are be bonded with blast tube 8 respectively with
The bonding agent of propellant is identical in powder column 7, is all made of fourth hydroxyl glue and does adhesive, fourth hydroxyl glue, that is, terminal hydroxy polybutadiene liquid rubber
Glue, also known as polybutadiene diol, mainly for the manufacture of solid propellant.
S3 acquires the big strain transducer of each Grazing condition using sensing data processing system 10 in real time according to certain frequency
5 resistivity measurements obtain powder column 7 in the big strain sensing of Grazing condition referring to the strain-resistance variation characteristic demarcated in step S1
The strain value of 5 its corresponding position of device, and each test point strain value is drawn or shown in host computer, to obtain powder column 7
Strain.
The data acquiring frequency of sensing data processing system 10 is 1Hz-100Hz, using the big strain transducer 5 of Grazing condition
Measurement solid engines stand the powder column 7 during saving for a long time and strain, since the deformation of powder column 7 carries out slowly, measurement frequency
Rate is not required to excessively high, and 1Hz-100Hz can meet, and otherwise increases the data volume of measurement and processing, improves testing cost.
Embodiment,
Based on the solid rocket motor grain strain measurement method of the big strain transducer of Grazing condition, specifically follow the steps below:
S1 prepares the big strain transducer 5 of Grazing condition, and as Figure 2-3, sensitive layer 1 uses redox graphene-polyimides
Foam, redox graphene are attached on polyimide foam, redox graphene-polyimide foam natural resiliency mould
Measure minimum, flexible package layer 4 uses dimethyl silicone polymer or Ecoflex 00-30(product composition for silicon rubber, manufacturer
For Smooth-On company, the U.S.) etc. low elastic modulus silicon rubber；Big 5 low elastic modulus of strain transducer (≤3MPa) of Grazing condition,
Big strain (0 ~ 40%) is mainly realized by sensitive layer 1 and flexible package layer 4.Sensitive layer 1 is connected by extraction electrode 2 and digital sourcemeter
It connects, strain-resistance variation characteristic of the big strain transducer 5 of each Grazing condition is demarcated using pull and push dynamometer and digital sourcemeter；Due to
The curing process of conductive nano elargol is simple, resistivity is low, therefore extraction electrode 2 passes through conductive nano elargol layer 3 and sensitive layer 1
It is fixedly connected；Extraction electrode 2 is the wire electrode for being coated with insulating materials, is connected with external digital sourcemeter or measurement processing circuit
It connects, wire electrode is using high metal materials of conductivity such as copper, silver or aluminium.Using pull and push dynamometer and sensing data processing system
10, strain-resistance variation characteristic of the big strain transducer 5 of each Grazing condition is demarcated, as shown in Figure 4.
Flexible package layer 4 selects dimethyl silicone polymer or Ecoflex 00-30, and sensitive layer 1 and nanometer can be protected to lead
Electric elargol layer 3.Since the elasticity modulus of extraction electrode 2 and sensitive layer 1 has very big difference, connected by conductive nano elargol layer 3
Extraction electrode 2 and sensitive layer 1 are easy to occur to be detached from here to destroy to become stress concentration point；Increase flexible package layer
After 4, the distortional stress in drawing process is distributed in flexible package layer 4, is alleviated the stress of conductive nano elargol layer 3, is played knot
The effect of structure protection.
The powder column 7 of S2, solid engines are poured and after the completion of heat preservation solidifications, and the big strain transducer 5 of 12 Grazing conditions is pressed
According to partially arrangement is successively pasted before, during and after 7 axial direction of powder column for 3 groups, the big strain transducer 5 of Grazing condition is arranged in powder column 7 along axis
It is more appropriate to 1/4,1/2 and the 3/4 of length, due to solid engines be it is horizontal positioned, it is under the effect of gravity, axial
Deformation at 1/2 is maximum, and the position at 1/4 and 3/4 can be used as the monitoring point with reference to auxiliary.Effect is to powder column 7 along axial direction
Accurate monitoring has been carried out by the strained situation under gravity on direction；The big strain transducer 5 of 4 Grazing conditions is one group, and 4 complete
Flexible big strain transducer 5 is uniformly distributed circumferentially a radial section in blast tube 8, using 90 degree of circle distributions, energy
Enough intermediate position strains to away from ground distalmost end, away from ground most proximal end and left and right are monitored, to powder column 7 along circumferential direction on by weighing
Strained situation under power effect has carried out accurate monitoring.
The quantity for the big strain transducer 5 of Grazing condition that one radial section of blast tube 8 is uniformly distributed circumferentially is many
In 4, the reason of limiting the number be powder column 7 stand save in be affected by gravity that deformation occurs, it is therefore desirable to along weight
Power direction placement sensor, to the same axial position vertical direction in 8 surface of blast tube away from ground distalmost end, away from ground most proximal end point
It Bu Zhi not strain transducer；The strain transducer for being located at middle part bilateral symmetry distribution can supervise the deformation of 7 side of powder column
It surveys.Strain transducer less than the number cannot reflect 7 inner wall of powder column along the deformation of gravity direction well.
S3 records the resistance value of the big strain transducer 5 of each Grazing condition using 2450 digital sourcemeter of Keithley, can
Then the dynamic change of real-time monitoring resistance carries out processing to resistance value and obtains strain value；Sensing data processing system 10 can
To be SCM Based processing circuit, the functions such as integrated resistor measurement, data processing, output display realize setting for the function
Meter method is known in the art.By the resistance value of the big strain transducer 5 of each Grazing condition of digital sourcemeter record, referring to step S1
Strain-resistance variation characteristic of middle calibration, obtains powder column 7 in the strain value of big 5 its corresponding position of strain transducer of Grazing condition, from
And the strain of powder column 7 is obtained, the strain value of distribution is drawn or shown in host computer.
The strain monitoring of solid engines mostly uses the strain transducer of metal or glass optical fiber at present, tough due to lacking
Property, 7 large deformation of powder column cannot accurately be monitored.Solid rocket motor grain 7 is strained for example, by using arch metal strain plate
It is monitored, maximum strain 20%；And the big strain transducer 5 of Grazing condition of the present invention is answered with conventional metal strain plate and optical fiber
Become sensor to compare, elasticity modulus is low (≤3MPa), and elasticity modulus is less than powder column 7, oxygen reduction fossil used in the examples
The big strain transducer 5 of black alkene-polyimide foam base Grazing condition can reach 40% big strain, therefore can be fitted in powder column 7
8 surface of blast tube, and have good compliance；It overcomes since fibre optic strain sensor and metal strain plate are from height
Elasticity modulus can not comply with the deformation of low elastic modulus powder column 7, the technical difficulty to be difficult to the strain of accurate measurements powder column 7, solve
Solid engines for a long time stand the real-time monitoring problem strained during storage to powder column 7.
Because powder column 7 is that casting solidifies inside solid engines shell 6 in solid engines manufacturing process, and carries out
Surface modification, therefore, it is impossible to which strain transducer 5 is embedded to inside powder column 7；The present invention arranges the big strain transducer 5 of Grazing condition
On 8 surface of blast tube, the mechanical property of powder column 7 can not be had an impact.In addition, the present invention is by the big strain sensing of Grazing condition
The bonding of device 5 is not set to the peripheral surface of powder column 7 in the blast tube 8 at 7 center of powder column, due in 7 peripheral surface of powder column,
Downside is contacted with solid engines shell, has certain support, cannot reflect the influence of gravity completely, and 8 nothing of blast tube
Support construction, the deformation for being affected by gravity generation is maximum, and the miniature deformation inside powder column 7, which is conducted to 8 surface of blast tube, to be generated
Amplification effect, therefore, be monitored to the deformation of powder column 7 has more importantly meaning in the position；It can start in solid
The deformation of accurate measurements powder column 7 during machine standing saves.
The big strain transducer 5 of Grazing condition is arranged in blast tube 8 by the present invention, is obtained the corresponding strain of specific location and is surveyed
Examination value obtains the strain inside powder column 7 using calculating simulation method, and numerical fitting goes out the deformation of inner surface entirety, thus
Reflect the internal strain of powder column 7；Detailed process are as follows: it is assumed that 6 inner surface of solid engines shell and 7 outer surface of powder column without being detached from and
Deformation obtains 7 inner surface of powder column initial and the deformation latter two moment according to the strain value of 8 surface distributed point of blast tube
Size establishes the three-dimensional finite element model of powder column 7, in conjunction with the mechanical property (such as elasticity modulus, density) of powder column 7, in finite element
Internal stress of the analog drug column 7 by original state to measuring state, strain are calculated in software, to the strain value of distribution in host computer
Drawn or shown solve the problems, such as directly monitor 7 internal strain of powder column.The measurement result is closer to medicine
The truth that column 7 deforms improves accuracy of measurement, provides truer, reliable foundation for engine health and life appraisal,
It is of great significance to solid rocket motor grain service life is improved.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (10)
1. a kind of solid rocket motor grain strain measurement method based on the big strain transducer of Grazing condition, which is characterized in that specific
It follows the steps below:
S1 prepares the big strain transducer of Grazing condition (5) that elasticity modulus is less than powder column (7), the big strain transducer of Grazing condition (5) packet
It includes sensitive layer (1), the outside of sensitive layer (1) is enclosed with flexible package layer (4), and sensitive layer (1) is connect with extraction electrode (2)；Mark
Strain-resistance variation characteristic of fixed each big strain transducer of Grazing condition (5)；
The big strain transducer of n Grazing condition (5) is divided into multiple groups, wherein n >=12, the big strain transducer of each group Grazing condition (5) by S2
Blast tube (8) surface at powder column (7) center is axially uniformly pasted on along powder column (7), with the group big strain transducer of Grazing condition (5)
Positioned at blast tube (8) same radial section and be uniformly distributed along the circumferential direction of blast tube (8)；The big strain sensing of Grazing condition
Device (5) bottom and blast tube (8) surface completely attach to, and extraction electrode (2) is adhered to blast tube (8) surface, and along powder column
(7) axial direction stretches out solid engines shell (6), connect with external sensing data processing system (10)；It records respectively
The initial resistance value of each big strain transducer of Grazing condition (5)；
S3 acquires the big strain transducer of each Grazing condition according to certain frequency using sensing data processing system (10) in real time
(5) resistivity measurements obtain powder column (7) in the big strain of Grazing condition referring to the strain-resistance variation characteristic demarcated in step S1
The strain value of sensor (5) corresponding position, to obtain the strain of powder column (7).
2. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that the step S3 is further comprising the steps of: corresponding in the big strain transducer of Grazing condition (5) according to powder column (7)
The strain value of position obtains the internal strain of powder column (7) using calculating simulation method；Detailed process are as follows: it is assumed that solid engines
Shell (6) inner surface and powder column (7) outer surface, according to the strain value of blast tube (8) surface distributed point, are obtained without being detached from and deforming
To powder column (7) inner surface in initial and the deformation latter two moment size, the three-dimensional finite element model of powder column (7) is established, in conjunction with
The mechanical property of powder column (7) calculates analog drug column (7) in finite element software and is answered by the inside of original state to measuring state
Become.
3. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S1, integral, flexible modulus≤3MPa of the big strain transducer of Grazing condition (5), strain measurement
Range 0 ~ 40%.
4. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S2, the big strain transducer of Grazing condition (5) is divided into 3 groups, is arranged in powder column (7) along axis
At 1/4,1/2 and the 3/4 of length, the big strain of the Grazing condition that a radial section of blast tube (8) is uniformly distributed circumferentially is passed
The quantity of sensor (5) is no less than 4.
5. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S1, the cross sectional dimensions of the big strain transducer of Grazing condition (5) is no more than long 10mm × wide
5mm, thickness≤3mm of the big strain transducer of Grazing condition (5), with the flexible package layer (4) contacted at the top and bottom of sensitive layer (1)
With a thickness of the 1/2 of sensitive layer (1) thickness.
6. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S2, the big strain transducer of Grazing condition (5) bottom, extraction electrode (2) are logical with combustion gas respectively
Bonding agent used by road (8) is bonded is identical as the bonding agent of powder column (7) interior propellant.
7. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S1, sensitive layer (1) uses redox graphene-polyimide foam, reduction-oxidation
Graphene is attached on polyimide foam.
8. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S1, flexible package layer (4) uses dimethyl silicone polymer or Ecoflex 00-30.
9. a kind of solid rocket motor grain strain measurement side based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S1, extraction electrode (2) connects by the way that conductive nano elargol layer (3) and sensitive layer (1) are fixed
It connects.
10. a kind of solid rocket motor grain strain measurement based on the big strain transducer of Grazing condition according to claim 1
Method, which is characterized in that in the step S3, the data acquiring frequency of sensing data processing system (10) is 1Hz-100Hz.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779593A (en) * | 2020-06-09 | 2020-10-16 | 湖北航天技术研究院总体设计所 | Solid rocket engine shell, solid rocket engine and manufacturing method thereof |
| CN114413741A (en) * | 2021-12-16 | 2022-04-29 | 陕西电器研究所 | Eddy current sensor for measuring strain of explosive column and measuring method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07113769A (en) * | 1993-10-13 | 1995-05-02 | Ishikawajima Harima Heavy Ind Co Ltd | Creep life estimting method |
| CN103487165A (en) * | 2013-09-22 | 2014-01-01 | 中北大学 | Testing system for internal temperature distribution in process of fusion cast forming of explosives |
| CN106404409A (en) * | 2016-11-16 | 2017-02-15 | 中国科学院工程热物理研究所 | Probe assembly suitable for strong-shearing unsteady flow test of aeroengine |
| CN109580228A (en) * | 2018-11-07 | 2019-04-05 | 北京灵动飞天动力科技有限公司 | The cold test run pilot system of solid propellant rocket |
-
2019
- 2019-05-23 CN CN201910435205.5A patent/CN110132122B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07113769A (en) * | 1993-10-13 | 1995-05-02 | Ishikawajima Harima Heavy Ind Co Ltd | Creep life estimting method |
| CN103487165A (en) * | 2013-09-22 | 2014-01-01 | 中北大学 | Testing system for internal temperature distribution in process of fusion cast forming of explosives |
| CN106404409A (en) * | 2016-11-16 | 2017-02-15 | 中国科学院工程热物理研究所 | Probe assembly suitable for strong-shearing unsteady flow test of aeroengine |
| CN109580228A (en) * | 2018-11-07 | 2019-04-05 | 北京灵动飞天动力科技有限公司 | The cold test run pilot system of solid propellant rocket |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111779593A (en) * | 2020-06-09 | 2020-10-16 | 湖北航天技术研究院总体设计所 | Solid rocket engine shell, solid rocket engine and manufacturing method thereof |
| CN111779593B (en) * | 2020-06-09 | 2021-09-07 | 湖北航天技术研究院总体设计所 | Solid rocket engine shell, solid rocket engine and manufacturing method thereof |
| CN114413741A (en) * | 2021-12-16 | 2022-04-29 | 陕西电器研究所 | Eddy current sensor for measuring strain of explosive column and measuring method |
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|---|---|
| CN110132122B (en) | 2020-03-17 |
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