CN109783847A - Multiple continuous thunder and lightning flow component acts on the appraisal procedure that lower carbon fibre composite damages more influence factors - Google Patents
Multiple continuous thunder and lightning flow component acts on the appraisal procedure that lower carbon fibre composite damages more influence factors Download PDFInfo
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Abstract
The present invention discloses a kind of appraisal procedure that multiple continuous thunder and lightning flow component acts on carbon fibre composite to damage more influence factors, it studies under multiple continuous thunder and lightning flow component effect, the various influence factors of carbon fibre composite thunder and lightning damage, obtain carbon fibre composite thunder and lightning damaged area, the peak value of lesion depths and multiple thunder and lightning flow component, climbing speed, transfer charge amount, related law between specific energy and effect clearance distance, on this basis, establish the multifactor assessment models that multiple continuous thunder and lightning flow component acts on lower thunder and lightning damage, obtain carbon fibre composite thunder and lightning damaged area, the amplitude of lesion depths and the more heavy thunder and lightning flow component, climbing speed, charge transfer quantity, specific energy, act on the multifactor impact factor such as clearance distance and its between mathematic(al) representation, probe into the thunder and lightning damage of carbon fibre composite Mechanism, the research for carbon fibre composite laminated plate prescription, technique provide theoretical foundation.
Description
Technical field
The invention belongs to the appraisal procedure of carbon fibre composite thunder and lightning damage, in particular to a kind of multiple continuous thunder and lightning streams
Component acts on the appraisal procedure that lower carbon fibre composite damages more influence factors.
Background technique
Carbon fibre composite had not only had the characteristics such as low-density, high intensity, high-modulus, high temperature resistant, resistant to chemical etching, but also tool
There is the soft machinability of textile fabric, is widely used in the every field such as aerospace, military affairs and civilian industry.With aircraft
The improvement of design and the progress of carbon fibre composite technology, high purity carbon fiberreinforced polymer composites CFRP (Carbon
Fiber Reinforced Polymers) dosage on Large Civil Aircraft, military aircraft, unmanned plane and stealth aircraft is not
It is disconnected to increase, from the dosage of CFRP on nineteen sixty McDonnell-Douglas Corporation DC-9 type less than 1%, to 2011 year end Boeing B787 main wing,
Empennage, body, floor isostructural 50% are CFRP materials, and ratio shared by CFRP material reaches on Air Passenger A350XWA
53%.
Compare aluminium, steel and the titanium alloy material that tradition uses in aircraft, and the electrical conduction performance of CFRP is poor.In general,
The resistivity of CFRP layer plywood warp direction is 10-5Ω m magnitude, the resistivity in transverse plane direction are 10-1Ω m magnitude,
Depth/thickness direction resistivity is bigger.This allows for CFRP layer plywood has in lightning stroke without image of Buddha metal material like that
The energy of the ability for having the short time that the charge of accumulation is made to shift or spread rapidly, the accumulation of this part is made in the form of Joule heat
CFRP temperature sharply increases, and seriously damages so as to cause the fibrous fracture of CFRP, resin pyrolysis, Depth Stratification etc..
European Union and American army mark define the direct test requirements document of aircraft thunder and lightning and thunder and lightning flow component, wherein thunder and lightning component packet
It includes component A (Fields of Lightning Return Stroke component for the first time) or Ah (the transition component of Fields of Lightning Return Stroke for the first time), B (intermediate current component), C/C* (is held
Continuous current component) and D (subsequent counterattack component) current wave, wherein lightning current component A, Ah and D wave are that peak value is high (respectively
200kA, 150kA, 100kA), the fast thunder and lightning flow component of climbing speed；When thunder and lightning flow component B can be average current 2kA, rise
Between the short, duration be several milliseconds of double exponential waves, be also possible to the more slow square wave current of rising；Thunder and lightning flow component C
For the rise time is slow, several hundred milliseconds of current wave of duration.
Since CFRP comes out, in terms of research hotspot is just concentrated on the research of its mechanical property by many scholars, obtain
Relationship schedule between the tensile strength of mechanical shock parameter and CFRP, incompressible intensity and damage field and lesion depths.
Presently, the research about the damage of carbon fibre composite thunder and lightning obtains more and more extensive concern, and many researchers exist
In the case that laboratory facilities lack, the thermoelectricity of lower carbon fibre composite thunder and lightning damage is acted on by establishing single thunder and lightning flow component
Coupling model tentatively obtains the affecting laws of carbon fibre composite thunder and lightning damaged area, lesion depths by simulation calculation.
But peak value, the climbing speed, electric charge transfer of carbon fibre composite thunder and lightning damage and single thunder and lightning flow component
The quantitative relationship of amount, specific energy and effect gap does not obtain, and the thunder and lightning of multiple continuous thunder and lightning flow component damages Research Literature
Report is very few, and more influence factor appraisal procedures of the thunder and lightning damage of single or multiple continuous thunder and lightning flow component seriously lag, significantly
Carbon fibre composite formula, the research of technique and the promotion of performance are hindered, thus constrains its answering in aerospace field
With.
Summary of the invention
Carbon fibre composite damage is more under acting on the purpose of the present invention is to provide a kind of multiple continuous thunder and lightning flow component
The appraisal procedure of influence factor obtains the rule between carbon fibre composite thunder and lightning damaged area, lesion depths and many factors
Rule, the research for carbon fibre composite laminated plate prescription, technique provide theoretical foundation.
The present invention uses following scheme to achieve the above object:
Multiple continuous thunder and lightning flow component acts on the appraisal procedure that lower carbon fibre composite damages more influence factors, will include
Between the amplitude of the multiple continuous thunder and lightning stream of lightning current A, B, C and D component, climbing speed, charge transfer quantity, specific energy and effect
Stand-off distance finally obtains thunder from the influence factor for acting on lower carbon fibre composite thunder and lightning damage as multiple continuous thunder and lightning flow component
Various influence factors and carbon fibre composite thunder and lightning damaged area, the experimental data of lesion depths of current component, in this base
On plinth, the multi-factor evaluation model of carbon fibre composite thunder and lightning damaged area, lesion depths is established, it is multiple to obtain carbon fiber
Condensation material thunder and lightning damaged area, lesion depths more influence factors impact factor, be the laminated plate prescription of carbon fibre composite,
The research of technique provides theoretical foundation.
Further, specifically comprise the following steps:
Step 1: act on clearance distance it is certain in the case where, apply single thunder and lightning flow component, double thunder and lightning flow component,
Triple thunder and lightning flow component, quadruple thunder and lightning flow component ..., the multiple continuous timing lightning current of multiple thunder and lightning flow component difference mould group
Component obtains the experimental data sample of carbon fibre composite thunder and lightning damaged area, lesion depths；
Step 2: acting on clearance distance in change, apply single thunder and lightning flow component, double thunder and lightning flow component, triple thunders and lightnings
Flow component, quadruple thunder and lightning flow component ..., the multiple continuous timing lightning current component of multiple thunder and lightning flow component difference mould group, obtain
Obtain the experimental data sample of carbon fibre composite thunder and lightning damaged area, lesion depths；
Step 3: establishing multiple continuous timing lightning current according to step 1 and the obtained experimental data sample of step 2
Component acts on the assessment models of lower carbon fibre composite lesion depths and damaged area, obtains carbon fibre composite thunder and lightning damage
Hurt peak value, climbing speed, transfer charge amount, specific energy and the effect gap of depth, damaged area and multiple thunder and lightning flow component
Related law and its impact factor between distance.
Further, the step 1 includes the following steps:
1.1) the multiple continuous thunder and lightning stream generating loop comprising lightning current A, B, C and D component is established；
1.2) the effect clearance distance of fixed carbon fibre composite thunder and lightning damage measure, clearance distance is within 1-10mm
It is selected；
1.3) test parameters of each thunder and lightning flow component in multiple continuous thunder and lightning stream test is set, and each thunder and lightning flow component is at least
3 test current points are set, and the current range of lightning current A component is arranged within 20-100kA；The electric current model of lightning current B component
It is trapped among within 0.2-1kA and is arranged；The current range of lightning current C component is arranged within 100-400A；The electric current of lightning current D component
Range is arranged within the scope of 10-50kA；
1.4) the carbon fibre composite thunder and lightning damage test of destructive lightning current A component, current test point I are carried outA1、
IA2And IA3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BA1、SA2And SA3With lesion depths DA1、DA2
And DA3；
1.5) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B component, current test point are carried out
For lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, and scanned to obtain carbon fibre composite with C/B
Thunder and lightning damaged area SAB1、SAB2And SAB3With lesion depths DAB1、DAB2And DAB3；
1.6) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B+C component, testing current are carried out
Point is lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, then subsequent lightning current C component IC1、IC2With
IC3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABC1、SABC2And SABC3With lesion depths DABC1、
DABC2And DABC3；
1.7) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B+C+D component is carried out, electric current is surveyed
Pilot is lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, then subsequent lightning current C component IC1、IC2With
IC3With lightning current D component ID1、ID2And ID3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCD1、
SABCD2And SABCD3With lesion depths DABCD1、DABCD2And DABCD3。
Further, the step 2 includes the following steps:
2.1) the multiple continuous thunder and lightning stream generating loop comprising lightning current A, B, C and D component is established；
2.2) the effect clearance distance range and test points m of carbon fibre composite thunder and lightning damage test, gap are set
Distance is selected within 1-10mm, and m is no less than 3；
2.3) the test current value for the test model and thunder and lightning flow component that setting carbon fibre composite thunder and lightning damages；Thunder and lightning
The current range of stream A component is arranged within 20-100kA；The current range of lightning current B component is arranged within 0.2-1kA；Thunder
The current range of electric current C component is arranged within 100-400A；The current range of lightning current D component is set within the scope of 10-50kA
It sets；
2.4) the carbon fibre composite thunder and lightning damage test for carrying out the lightning current A component of predetermined current test value, is used in combination
C/B scans to obtain the thunder and lightning damaged area S of carbon fibre compositeAd1With lesion depths DAd1。
2.5) the carbon fibre composite thunder and lightning damage of the multiple continuous thunder and lightning stream A+B component of predetermined current test value is carried out
Test, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABd1With lesion depths DABd1；
2.6) the carbon fibre composite thunder and lightning damage of the multiple continuous thunder and lightning stream A+B+C component of predetermined current test value is carried out
Wound test, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCd1With lesion depths DABCd1；
2.7) the carbon fibre composite thunder and lightning of the multiple continuous thunder and lightning stream A+B+C+D component of predetermined current test value is carried out
Damage test, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCDd1With lesion depths DABCDd1。
Further, the step 3 includes the following steps:
3.1) the thunder and lightning damaged area (S of lower carbon fibre composite is acted on the multiple continuous thunder and lightning flow component of acquisitionA1、
SA2、SA3)、(SAB1、SAB2、SAB3)、(SABC1、SABC2、SABC3)、(SABCD1、SABCD2、SABCD3) and lesion depths (DA1、DA2、DA3)、
(DAB1、DAB2、DAB3)、(DABC1、DABC2、DABC3)、(DABCD1、DABCD2、DABCD3) test data is analyzed and processed, establishes multiple
Continuous thunder and lightning flow component act on lower carbon fibre composite thunder and lightning damaged area, lesion depths and thunder and lightning flow component amplitude, on
Raising speed rate, charge transfer quantity, the thunder and lightning lesion assessment model between specific energy；
Under the distance condition of fixed interval (FI), multiple continuous thunder and lightning flow component acts on the thunder and lightning damage surface of lower carbon fibre composite
Shown in the relationship such as formula (1) of long-pending and lesion depths and lightning current component parameters, (2):
In formula (1), (2), k1As、k2As、k3AsRespectively the climbing speed of lightning current A component, charge transfer quantity, than energy
Measure the impact factor to carbon fibre composite thunder and lightning damaged area；(k1Bs、k2Bs、k3Bs)、(k1Cs、k2Cs、k3Cs)、(k1Ds、
k2Ds、k3Ds) it is respectively that lightning current B component, C component, the climbing speed of D component, charge transfer quantity, specific energy are compound to carbon fiber
The impact factor of material thunder and lightning damaged area；Similarly, k1Ad、k2Ad、k3AdRespectively the climbing speed of lightning current A component, charge turn
Shifting amount, specific energy are to the impact factors of carbon fibre composite thunder and lightning lesion depths；(k1Bd、k2Bd、k3Bd)、(k1Cd、k2Cd、
k3Cd)、(k1Dd、k2Dd、k3Dd) it is respectively lightning current B component, C component, the climbing speed of D component, charge transfer quantity, specific energy pair
The impact factor of carbon fibre composite thunder and lightning lesion depths；
Consider the influence that the effect clearance distance of thunder and lightning flow component damages carbon fibre composite thunder and lightning, above-mentioned formula becomes
It is changed to:
Wherein, kAdd、kBdd、kCdd、kDddRespectively correspond to effect clearance distance to lightning current A component, B component, C points
The impact factor that amount, D component thunder and lightning damage.
3.2) lower carbon fibre composite thunder and lightning damaged area and lesion depths are acted on according to multiple continuous thunder and lightning flow component,
It calculates multiple continuous thunder and lightning flow component and acts on the impact factor that lower carbon fibre composite thunder and lightning damages multifactor assessment, and
According to thunder and lightning damaged area, lesion depths and lightning current component amplitude, climbing speed, specific energy close relation degree by formula
(1), (2) carry out simple optimization, carry out multifactor assessment to the thunder and lightning damage of carbon fibre composite, and to carbon fiber composite
The model of material thunder and lightning damage is verified and is corrected.
Multiple continuous thunder and lightning flow component of the invention acts on the assessment side that lower carbon fibre composite damages more influence factors
Method, is studied under multiple continuous thunder and lightning flow component effect, and the various influence factors of carbon fibre composite thunder and lightning damage obtain carbon fiber
Tie up peak value, climbing speed, transfer charge amount, the ratio of composite material thunder and lightning damaged area, lesion depths and multiple thunder and lightning flow component
Related law between energy and effect clearance distance establishes multiple continuous thunder and lightning flow component and acts on lower thunder on this basis
The multifactor assessment models of electric injury obtain carbon fibre composite thunder and lightning damaged area, lesion depths and the more heavy lightning current
The multifactor impact factor such as the amplitude of component, climbing speed, charge transfer quantity, specific energy, effect clearance distance and its between
Mathematic(al) representation, probe into the thunder and lightning micromechanism of damage of carbon fibre composite, be the laminated plate prescription of carbon fibre composite, technique
Research provide theoretical foundation.
Detailed description of the invention
Fig. 1 is the schematic diagram of lightning current components R LC test loop of the present invention.
Fig. 2 is the schematic diagram of thunder and lightning flow component CROWBAR test loop of the present invention.
Fig. 3 is the schematic diagram in thunder and lightning flow component LC multichain network test circuit of the present invention
Fig. 4 is the clamping schematic diagram of test item carbon fibre composite of the present invention
The multiple continuous thunder and lightning flow component of Fig. 5 present invention acts on the test model signal of lower carbon fibre composite thunder and lightning damage
Figure
Fig. 6 is the test flow chart that the multiple thunder and lightning flow component of the present invention acts on lower carbon fibre composite thunder and lightning damage
Fig. 7 is that the multiple continuous thunder and lightning flow component of the present invention acts on lower carbon fibre composite thunder and lightning damage and effect clearance gap
Experiment process figure from affecting laws
Fig. 8 is the assessment that the multiple continuous thunder and lightning flow component of the present invention acts on that lower carbon fibre composite damages more influence factors
Method flow diagram
In figure: 1 is controllable DC charging power supply；2 be storage capacitor unit；3 be discharge switch；4 adjust resistance for waveform；
5 adjust inductance for waveform；11 be top electrode stick；12 be top electrode end；13 be upper insulated end cover；14 be copper billet；15 be spring；
16 be the first bolt；17 be the first nut；18 be gasket；19 be insulating supporting；110 be test item insulator foot；111 be second
Bolt；112 be test item；113 be fixed insulation sleeve；114 be the second nut；21 be storage capacitor；31 be main discharge switch；32
For CROWBAR switch；41 be waveform formation resistance；51 be waveform formation inductance.
Specific embodiment
The principle of the present invention and calculation method are described in further detail with reference to the accompanying drawings and embodiments.
Referring to Fig. 1, circuit occurs for the RLC of thunder and lightning flow component of the present invention, can produce lightning current A component, Ah component, D point
Amount.In Fig. 1, controllable DC charging power supply 1 is by pressure regulator T1, transformer T2, rectifier diode D, charging resistor R2Composition；Switch
S and resistance R3Form storage capacitor safety relief circuit；Storage capacitor unit 2 (capacitance C), discharge switch 3, waveform adjustment electricity
Feel 5 (inductance L), waveform adjustment resistance 4 (resistance value R), composition lightning current A component discharge loop.
Below by taking lightning current A component as an example, to illustrate the method for adjustment of non-linear lightning current A component loop parameter, other
Thunder and lightning flow component circuit is referred to the selection that this process carries out loop parameter.
Lightning current A component meets following formula are as follows:
I (t)=I0(e-αt-e-βt), in which: α=11354s-1, β=647265s-1
Thus the rise time T of lightning current A component is calculated1With half time to peak T2It is respectively as follows:
T1=3.56 μ s T2=69 μ s
Non-linear lightning current A component circuit is generated using rlc circuit, and loop parameter selects in accordance with the following steps:
According to following formula (1):
In formula (1), C is storage capacitor unit 2, and L is that waveform adjusts inductance 4, and R is that waveform adjusts resistance 5；U0For energy storage
The charging voltage at capacitor both ends, T1For the wave front time of thunder and lightning flow component, imThe peak value of electric current is exported for circuit, ξ is Fig. 2 circuit
Damped coefficient；T1 *For the normalization coefficient of wave front time, im *For normalized peak factor.
Contain 4 unknown numbers in 3 equations described in formula (1), therefore, equation (1) has infinite multiple groups solution.It is assumed that storage
It, can be according to 1 selection parameter of table under conditions of energy capacitance:
Table 1: the selection of lightning current A component loop parameter
| Serial number | Capacitor C | Resistance R | Inductance L |
| 1 | 100 | 0.9 | 1.4 |
| 2 | 50 | 1.8 | 2.8 |
| 3 | 25 | 3.6 | 4.2 |
| …… | …… | …… | …… |
Other thunder and lightning flow component, such as Ah component, D component can be designed with above-mentioned same method.
Referring to fig. 2, the schematic diagram of the CROWBAR generating loop of thunder and lightning flow component of the present invention can be used to generate lightning current A
Component, Ah component, D component etc..In Fig. 2, the controllable DC charging power supply 1 of the voltage at 21 both ends of storage capacitor as shown in Figure 1 into
Row charging, the discharge loop of thunder and lightning flow component is by storage capacitor 21, main discharge switch 31, CROWBAR switch 32, waveform formation electricity
Sense 51, waveform formation resistance 41 form.Electricity in thunder and lightning flow component occurs for the road of changing of main discharge switch 31 and CROWBAR switch 32
It flows at wave crest, before electric current wave crest, main discharge switch 31 is closed, and after electric current wave crest, main discharge switch 31 is disconnected, CROWBAR
Switch 32 is closed, and completes the wave rear part of thunder and lightning flow component.Waveform formation inductance 51 and wavefront form the selection gist of resistance 41
The impedance of test item is adjustable.
Referring to Fig. 3, circuit occurs for the LC multichain network of thunder and lightning flow component of the present invention, can produce lightning current B component, C point
Amount, in order to ensure the stability of peak point current in the square wave current duration, the chain number in general L-C multichain square wave circuit be should be greater than
It is exactly the square wave current generating loop that LC chain number is 12 in 8, Fig. 3.According to standard requirements, the duration of square wave current is 5ms,
The loop parameter of its LC multichain network selects in accordance with the following steps:
According to following formula (2):
In formula (2), LΣ、CΣEach chain inductance L respectively in inductance capacitance LC chain1、L2……、L11、L12With each chain capacitor
C1、C2……、C11、C12The sum of.Therefore, as long as the capacitance of the inductance of inductance and capacitor is full in inductance capacitance LC multichain circuit
Sufficient equation (1), so that it may the square wave lightning current B component for meeting standard prescribed requirement is generated, it can be according to 2 selection parameter of table:
Table 2: the selection of lightning current B component loop parameter
| Serial number | Total inductance L/mF | Total capacitance C/ μ F |
| 1 | 31.250 | 200 |
| 2 | 15.625 | 400 |
| 3 | 6.250 | 1000 |
| 4 | 3.125 | 2000 |
| …… | …… | …… |
In Fig. 3, controllable DC charging power supply is by pressure regulator Tr, transformer Tt, rectifier diode D, charging resistor R1Composition；
Switch S and resistance R2Form storage capacitor safety relief circuit.
Referring to fig. 4, the clamping schematic diagram of test item carbon fibre composite, top electrode stick 11 and lightning current A component occur
The high-voltage output end in circuit is connected, and top electrode end 12, upper insulated end cover 13, copper billet 14, spring 15 clamp test item；Second
Bolt 111 is for test item insulator foot 110 and insulating supporting 19 to be fixed together；Insulation sleeve 113 is fixed by top electrode stick
11 are fixed together with upper insulation cover plate 13；Second nut 114 is for the electricity between thunder and lightning flow component generating loop and test item
Gas connection.
Referring to Fig. 5, the test model of the invention patent carbon fibre composite thunder and lightning damage, comprising: the lightning stroke area 1A A+B+
The multiple thunder and lightning flow component of Ah+B+C* in the multiple thunder and lightning flow component of C*, the multiple thunder and lightning flow component of the area 1B A+B+C+D and the area 1C, lightning stroke
The A/5+B+C* of the multiple thunder and lightning flow component of D+B+C of the multiple thunder and lightning flow component of the D+B+C* in the area 2A and the area 2B, 3rd area of lightning stroke attachment is more
The multiple thunder and lightning flow component of A+B+C+D in 3rd area of weight thunder and lightning flow component and lightning stroke conduction.
Referring to Fig. 6, the multiple continuous thunder and lightning flow component in fixed function gap acts on lower carbon fibre composite thunder and lightning damage
Experiment process is as follows:
1) the multiple continuous thunder and lightning stream generating loop comprising lightning current A, B, C and D component is established.
2) the effect clearance distance of fixed carbon fibre composite thunder and lightning damage measure, can select within 1-10mm.
3) test parameters of each thunder and lightning flow component in multiple continuous thunder and lightning stream test is set, and each thunder and lightning flow component is at least set
Set 3 test current points.The current range of lightning current A component can be arranged within 20-100kA；The electric current of lightning current B component
Range is arranged within 0.2-1kA；The current range of lightning current C component is arranged within 100-400A；The electricity of lightning current D component
Stream range can be arranged within the scope of 10-50kA.
4) the carbon fibre composite thunder and lightning damage test of destructive lightning current A component, current test point I are carried outA1、
IA2And IA3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BA1、SA2And SA3With lesion depths DA1、DA2
And DA3。
5) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B component is carried out, current test point is
Lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, and scanned to obtain carbon fibre composite with C/B
Thunder and lightning damaged area SAB1、SAB2And SAB3With lesion depths DAB1、DAB2And DAB3。
6) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B+C component, current test point are carried out
For lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, then subsequent lightning current C component IC1、IC2And IC3,
And it is scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABC1、SABC2And SABC3With lesion depths DABC1、DABC2With
DABC3。
7) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B+C+D component, testing current are carried out
Point is lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, then subsequent lightning current C component IC1、IC2And IC3
With lightning current D component ID1、ID2And ID3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCD1、SABCD2
And SABCD3With lesion depths DABCD1、DABCD2And DABCD3。
Referring to Fig. 7, the multiple continuous thunder and lightning flow component of the present invention is acted between lower carbon fibre composite thunder and lightning damage and effect
Stand-off distance is as follows from the experiment process of affecting laws:
1) the multiple continuous thunder and lightning stream generating loop comprising lightning current A, B, C and D component is established
2) the effect clearance distance range (1-10mm) and test points of carbon fibre composite thunder and lightning damage test are set
M, m are at least no less than 3.
3) the test current value for the test model and thunder and lightning flow component that setting carbon fibre composite thunder and lightning damages.Lightning current
The current range of A component can be arranged within 20-100kA；The current range of lightning current B component is arranged within 0.2-1kA；
The current range of lightning current C component is arranged within 100-400A；The current range of lightning current D component can be in 10-50kA model
Enclose interior setting.
4) the carbon fibre composite thunder and lightning damage test of the lightning current A component of predetermined current test value is carried out, and uses C/B
Scanning obtains the thunder and lightning damaged area S of carbon fibre compositeAd1With lesion depths DAd1。
5) the carbon fibre composite thunder and lightning for carrying out the multiple continuous thunder and lightning stream A+B component of predetermined current test value damages examination
It tests, and is scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABd1With lesion depths DABd1。
6) the carbon fibre composite thunder and lightning damage of the multiple continuous thunder and lightning stream A+B+C component of predetermined current test value is carried out
Test, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCd1With lesion depths DABCd1。
7) the carbon fibre composite thunder and lightning damage of the multiple continuous thunder and lightning stream A+B+C+D component of predetermined current test value is carried out
Wound test, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCDd1With lesion depths DABCDd1。
Referring to Fig. 8, more influence factors that multiple continuous thunder and lightning flow component acts on lower carbon fibre composite thunder and lightning damage are commented
It is as follows to estimate method:
1) the thunder and lightning damaged area (S of lower carbon fibre composite is acted on the multiple continuous thunder and lightning flow component of acquisitionA1、
SA2、SA3)、(SAB1、SAB2、SAB3)、(SABC1、SABC2、SABC3)、(SABCD1、SABCD2、SABCD3) and lesion depths (DA1、DA2、DA3)、
(DAB1、DAB2、DAB3)、(DABC1、DABC2、DABC3)、(DABCD1、DABCD2、DABCD3) test data is analyzed and processed, establishes multiple
Continuous thunder and lightning flow component act on lower carbon fibre composite thunder and lightning damaged area, lesion depths and thunder and lightning flow component amplitude, on
Thunder and lightning lesion assessment model between the parameters such as raising speed rate, charge transfer quantity, specific energy.
2) under the distance condition of fixed interval (FI), multiple continuous thunder and lightning flow component acts on lower carbon fibre composite thunder and lightning damage
Influence factor includes: peak value, climbing speed, charge transfer quantity and the specific energy of thunder and lightning flow component, but current peak and charge turn
Shifting amount, specific energy are directly related, then the thunder and lightning damaged area of carbon fibre composite and lesion depths and lightning current component parameters
Relationship such as formula (1), shown in (2):
In formula (1), (2), k1As、k2As、k3AsRespectively the climbing speed of lightning current A component, charge transfer quantity, than energy
Measure the impact factor to carbon fibre composite thunder and lightning damaged area；(k1Bs、k2Bs、k3Bs)、(k1Cs、k2Cs、k3Cs)、(k1Ds、
k2Ds、k3Ds) it is respectively that lightning current B component, C component, the climbing speed of D component, charge transfer quantity, specific energy are compound to carbon fiber
The impact factor of material thunder and lightning damaged area；Similarly, k1Ad、k2Ad、k3AdRespectively the climbing speed of lightning current A component, charge turn
Shifting amount, specific energy are to the impact factors of carbon fibre composite thunder and lightning lesion depths；(k1Bd、k2Bd、k3Bd)、(k1Cd、k2Cd、
k3Cd)、(k1Dd、k2Dd、k3Dd) it is respectively lightning current B component, C component, the climbing speed of D component, charge transfer quantity, specific energy pair
The impact factor of carbon fibre composite thunder and lightning lesion depths.
From above-mentioned formula (1) and (2) it is found that two equations there are 24 unknown numbers, therefore, 12 test points are at least needed
The test data of thunder and lightning damaged area, lesion depths, is folded to each thunder and lightning flow component, and test point is no less than 3；If wanted
The stability that multiple continuous thunder and lightning flow component acts on the lower carbon fibre composite thunder and lightning damage multifactor impact factor is verified, it is each
A thunder and lightning flow component test data point should also continue growing, for example test point is no less than 4.
3) consider the influence that the effect clearance distance of thunder and lightning flow component damages carbon fibre composite thunder and lightning, above-mentioned formula
Transformation are as follows:
Wherein, kAdd、kBdd、kCdd、kDddRespectively correspond to effect clearance distance to lightning current A component, B component, C points
The impact factor that amount, D component thunder and lightning damage.
From above-mentioned formula (3) and (4) it is found that two equations there are 32 unknown numbers, therefore, 16 test points are at least needed
The test data of thunder and lightning damaged area, lesion depths；If it is compound to verify carbon fiber under multiple continuous thunder and lightning flow component acts on
Material thunder and lightning damages the stability of the multifactor impact factor, each thunder and lightning flow component test data point should also continue growing.
Lower carbon fibre composite thunder and lightning damaged area and lesion depths are acted on according to multiple continuous thunder and lightning flow component, it can be with
It calculates multiple continuous thunder and lightning flow component and acts on the impact factor that lower carbon fibre composite thunder and lightning damages multifactor assessment, and
According to thunder and lightning damaged area, lesion depths and lightning current component amplitude, climbing speed, specific energy close relation degree, can be with
Formula (1), (2) are subjected to simple optimization, multifactor assessment rapidly are carried out to the thunder and lightning damage of carbon fibre composite, and right
The model of carbon fibre composite thunder and lightning damage is verified and is corrected.
Finally it should be noted that: the above examples are only used to illustrate the technical scheme of the present invention rather than its limitations, to the greatest extent
Pipe is described the invention in detail referring to above-described embodiment, it should be understood by those ordinary skilled in the art that: still may be used
With modifications or equivalent substitutions are made to specific embodiments of the invention, and repaired without departing from any of spirit and scope of the invention
Change or equivalent replacement, should all cover in present claims range.
Claims (5)
1. multiple continuous thunder and lightning flow component acts on the appraisal procedure that lower carbon fibre composite damages more influence factors, feature exists
In: by amplitude, climbing speed, charge transfer quantity, the specific energy of the multiple continuous thunder and lightning stream comprising lightning current A, B, C and D component
And effect clearance distance acts on the influence factor of lower carbon fibre composite thunder and lightning damage as multiple continuous thunder and lightning flow component,
The experiment number of the final various influence factors for obtaining thunder and lightning flow component and carbon fibre composite thunder and lightning damaged area, lesion depths
According on this basis, establishing the multi-factor evaluation model of carbon fibre composite thunder and lightning damaged area, lesion depths, obtain
Carbon fibre composite thunder and lightning damaged area, lesion depths more influence factors impact factor, be carbon fibre composite
The research of laminated plate prescription, technique provides theoretical foundation.
2. according to the method described in claim 1, it is characterized in that specifically comprising the following steps:
Step 1: act on clearance distance it is certain in the case where, apply single thunder and lightning flow component, double thunder and lightning flow component, triple
Thunder and lightning flow component, quadruple thunder and lightning flow component ..., the multiple continuous timing lightning current of multiple thunder and lightning flow component difference mould group point
Amount obtains the experimental data sample of carbon fibre composite thunder and lightning damaged area, lesion depths；
Step 2: acting on clearance distance in change, apply single thunder and lightning flow component, double thunder and lightning flow component, triple thunder and lightning flow points
Amount, quadruple thunder and lightning flow component ..., the multiple continuous timing lightning current component of multiple thunder and lightning flow component difference mould group, obtain carbon
The experimental data sample of fibrous composite thunder and lightning damaged area, lesion depths；
Step 3: establishing multiple continuous timing lightning current component according to step 1 and the obtained experimental data sample of step 2
The assessment models for acting on lower carbon fibre composite lesion depths and damaged area, it is deep to obtain the damage of carbon fibre composite thunder and lightning
Degree, the peak value of damaged area and multiple thunder and lightning flow component, climbing speed, transfer charge amount, specific energy and effect clearance distance
Between related law and its impact factor.
3. according to the method described in claim 2, it is characterized by:
The step 1 includes the following steps:
1.1) the multiple continuous thunder and lightning stream generating loop comprising lightning current A, B, C and D component is established；
1.2) the effect clearance distance of fixed carbon fibre composite thunder and lightning damage measure, clearance distance select within 1-10mm
It is fixed；
1.3) test parameters of each thunder and lightning flow component in multiple continuous thunder and lightning stream test is set, and each thunder and lightning flow component is at least arranged
3 test current points, the current range of lightning current A component are arranged within 20-100kA；The current range of lightning current B component exists
It is arranged within 0.2-1kA；The current range of lightning current C component is arranged within 100-400A；The current range of lightning current D component
It is arranged within the scope of 10-50kA；
1.4) the carbon fibre composite thunder and lightning damage test of destructive lightning current A component, current test point I are carried outA1、IA2With
IA3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BA1、SA2And SA3With lesion depths DA1、DA2And DA3；
1.5) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B component is carried out, current test point is thunder
Electric current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, and scanned to obtain the thunder of carbon fibre composite with C/B
Injured area SAB1、SAB2And SAB3With lesion depths DAB1、DAB2And DAB3；
1.6) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B+C component is carried out, current test point is
Lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, then subsequent lightning current C component IC1、IC2And IC3, and
It is scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABC1、SABC2And SABC3With lesion depths DABC1、DABC2With
DABC3；
1.7) the carbon fibre composite thunder and lightning damage test of multiple continuous thunder and lightning stream A+B+C+D component, current test point are carried out
For lightning current A component IA1、IA2、IA3Subsequent lightning current B component IB1、IB2And IB3, then subsequent lightning current C component IC1、IC2And IC3With
Lightning current D component ID1、ID2And ID3, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCD1、SABCD2With
SABCD3With lesion depths DABCD1、DABCD2And DABCD3。
4. according to the method described in claim 3, it is characterized by:
The step 2 includes the following steps:
2.1) the multiple continuous thunder and lightning stream generating loop comprising lightning current A, B, C and D component is established；
2.2) the effect clearance distance range and test points m of carbon fibre composite thunder and lightning damage test, clearance distance are set
It is selected within 1-10mm, m is no less than 3；
2.3) the test current value for the test model and thunder and lightning flow component that setting carbon fibre composite thunder and lightning damages；Lightning current A
The current range of component is arranged within 20-100kA；The current range of lightning current B component is arranged within 0.2-1kA；Thunder and lightning
The current range of stream C component is arranged within 100-400A；The current range of lightning current D component is arranged within the scope of 10-50kA；
2.4) the carbon fibre composite thunder and lightning damage test of the lightning current A component of predetermined current test value is carried out, and is swept with C/B
It retouches to obtain the thunder and lightning damaged area S of carbon fibre compositeAd1With lesion depths DAd1；
2.5) the carbon fibre composite thunder and lightning for carrying out the multiple continuous thunder and lightning stream A+B component of predetermined current test value damages examination
It tests, and is scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABd1With lesion depths DABd1；
2.6) the carbon fibre composite thunder and lightning for carrying out the multiple continuous thunder and lightning stream A+B+C component of predetermined current test value damages examination
It tests, and is scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCd1With lesion depths DABCd1；
2.7) the carbon fibre composite thunder and lightning damage of the multiple continuous thunder and lightning stream A+B+C+D component of predetermined current test value is carried out
Test, and scanned to obtain the thunder and lightning damaged area S of carbon fibre composite with C/BABCDd1With lesion depths DABCDd1。
5. according to the method described in claim 2, it is characterized by:
The step 3 includes the following steps:
3.1) the thunder and lightning damaged area (S of lower carbon fibre composite is acted on the multiple continuous thunder and lightning flow component of acquisitionA1、SA2、
SA3)、(SAB1、SAB2、SAB3)、(SABC1、SABC2、SABC3)、(SABCD1、SABCD2、SABCD3) and lesion depths (DA1、DA2、DA3)、
(DAB1、DAB2、DAB3)、(DABC1、DABC2、DABC3)、(DABCD1、DABCD2、DABCD3) test data is analyzed and processed, establishes multiple
Continuous thunder and lightning flow component act on lower carbon fibre composite thunder and lightning damaged area, lesion depths and thunder and lightning flow component amplitude, on
Raising speed rate, charge transfer quantity, the thunder and lightning lesion assessment model between specific energy；
Under the distance condition of fixed interval (FI), multiple continuous thunder and lightning flow component act on lower carbon fibre composite thunder and lightning damaged area and
Shown in the relationship such as formula (1) of lesion depths and lightning current component parameters, (2):
In formula (1), (2), k1As、k2As、k3AsThe respectively climbing speed of lightning current A component, charge transfer quantity, specific energy pair
The impact factor of carbon fibre composite thunder and lightning damaged area；(k1Bs、k2Bs、k3Bs)、(k1Cs、k2Cs、k3Cs)、(k1Ds、k2Ds、
k3Ds) it is respectively lightning current B component, C component, the climbing speed of D component, charge transfer quantity, specific energy to carbon fibre composite
The impact factor of thunder and lightning damaged area；Similarly, k1Ad、k2Ad、k3AdThe respectively climbing speed of lightning current A component, electric charge transfer
Amount, specific energy are to the impact factors of carbon fibre composite thunder and lightning lesion depths；(k1Bd、k2Bd、k3Bd)、(k1Cd、k2Cd、k3Cd)、
(k1Dd、k2Dd、k3Dd) it is respectively lightning current B component, C component, the climbing speed of D component, charge transfer quantity, specific energy to carbon fiber
Tie up the impact factor of composite material thunder and lightning lesion depths；
Consider the influence that the effect clearance distance of thunder and lightning flow component damages carbon fibre composite thunder and lightning, above-mentioned formula transformation
Are as follows:
Wherein, kAdd、kBdd、kCdd、kDddRespectively correspond to effect clearance distance to lightning current A component, B component, C component, D points
Measure the impact factor of thunder and lightning damage；
3.2) lower carbon fibre composite thunder and lightning damaged area and lesion depths are acted on according to multiple continuous thunder and lightning flow component, calculated
Multiple continuous thunder and lightning flow component acts on the impact factor that lower carbon fibre composite thunder and lightning damages multifactor assessment out, and according to
Thunder and lightning damaged area, lesion depths and lightning current component amplitude, climbing speed, specific energy close relation degree by formula (1),
(2) simple optimization is carried out, multifactor assessment is carried out to the thunder and lightning damage of carbon fibre composite, and to carbon fibre composite thunder
The model of electric injury is verified and is corrected.
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