CN1302743A - Restricting rod type experiment apparatus and method for simulating car collision - Google Patents
Restricting rod type experiment apparatus and method for simulating car collision Download PDFInfo
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- CN1302743A CN1302743A CN 01101906 CN01101906A CN1302743A CN 1302743 A CN1302743 A CN 1302743A CN 01101906 CN01101906 CN 01101906 CN 01101906 A CN01101906 A CN 01101906A CN 1302743 A CN1302743 A CN 1302743A
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Abstract
A restricting rod type experiment equipment for simulating the car collision to find out the collision results of car, safety belt, safety seat, safety air bag and internal decoration is disclosed. The impact piston rod to which the restricting rod with variable cross-section is installed is set up in external barrel. Said restricting rod is linked to the base. There is a gap between a restricting ring installed to the top of piston and the said restricting rod. Different restricting rods are designed to simulate actual decleration and acceleration waveforms. Its advantages include high simulation precision, compact structure and small size.
Description
The present invention is a kind of restricting rod type experiment simulated automotive collision energy-absorbing device that is used for the simulated crash environmental experiment of car belt, safety seat and safety air bag and automobile inner ornament.
In automobile design, full scale vehicle collision is the important means of check vehicle safety performance, but the full scale vehicle collision experimental expenses is very high, particularly to the design and the quality control surveillance of auto parts and components such as safety air bag, safety seat, safety strap, owing to need real collision process, its key be must can simulated automotive endergonic process in the collision, identical with the deceleration/decel waveform and the real vehicle relevant acceleration that guarantee to be measured on the coaster, simulated experiment just is counted as merit.
In the prior art, simulative automobile collision energy-absorbing device mainly contains the elasticity energy-absorbing pad that MTS company forms with rubber and pneumatic tyre, regulates this technology of its endergonic process by the thickness of regulating rubber pad and can only simulate half-sine wave; The steel wire floor that SEATTLE SAFETY company adopts the coaster cutting to be wound in certain-length and height is simulated the collision energy-absorbing process of real vehicle, and this technological debugging complexity is difficult for accuracy control; MGA company adopts gaseous tension in the needle-valve regulation and control cylinder, and control action produces corresponding deceleration/decel waveform at supratrochlear application force; HYGE company and BSRS company then adopt the computer servo-system one control air valve to promote coaster and produce the acceleration waveform that is similar to the collision process real vehicle, and it adopts the mode with emission, and the cost height has limited the popularization of these products in China.
Domestic mainly is to utilize flute shape damping hole buffering coaster to produce corresponding deceleration/decel waveform, and this technology is to open a series of holes according to different waveforms on urceolus, and the quantity of decision plug-hole, shortcoming are that the simulation difficulty is big, and precision is low, the equipment cost height.
The purpose of this invention is to provide a kind ofly, designed different variable cross section throttling rods, made simulative pulley produce the restricting rod type experiment simulated automotive crash device of the acceleration waveform identical with real vehicle according to different vehicles and collision velocity.
The present invention realizes by following scheme, restricting rod type experiment simulated automotive collision test device is characterized in that the impact piston bar that variable cross section throttling rod is housed is contained in the urceolus, and variable cross section throttling rod links to each other with base, throttling ring is contained in pistons end, leaves the gap between throttling ring and the variable cross section throttling rod.The gap of leaving between throttling ring and the variable cross section throttling rod is according to different vehicles and collision velocity, designing different variable cross section throttling rods realizes, by designing different variable cross section throttling rods, reach the purpose that simulative pulley produces the acceleration waveform identical with real vehicle.
Interval area between throttling ring of the present invention and the variable cross section throttling rod is;
Wherein: a
x: interval area
k
1: the flowed friction coefficient that liquid flows at this interval area
V: actual measurement vehicle speed
R: density of liquid
G: acceleration due to gravity
M: coaster quality
A: survey the acceleration/accel that subtracts in the car collision
F
c: the friction force of coaster and collision piston rod
A: piston effective area
Variable cross section throttling rod of the present invention can be provided with on the equal diameter graduating stem and become the size groove.Variable cross section throttling rod also can be provided with on the equal diameter graduating stem and become the size groove, equally also can change the interval area between throttling ring and the graduating stem, with the pressure resistance of controlling liquid.
A kind of method of using restricting rod type experiment simulated automotive collision test device, it is characterized in that colliding the impact piston bar that is contained in the urceolus with simulative pulley, liquid in the pistons end extruding high pressure chest of impact piston bar, liquid flows into low-pressure cavity through the throttling ring and the gap between variable cross section throttling rod of pistons end, change the interval area between throttling ring and the variable cross section throttling rod, fluid pressure in the control high pressure chest is regulated the resistance that impact piston pole pair coaster produces, and obtains the accelerating curve that subtracts of coaster simulated automotive collision.
Description of drawings:
Fig. 1 is the constructional drawing of restricting rod type experiment simulated automotive crash device
Fig. 2 is the A-A cutaway view of Fig. 1
Fig. 3 is for being provided with the constructional drawing of groove on the equal diameter graduating stem
Among the figure: 1, impact piston bar 2, fastener 3, orienting sleeve 4,7,10 seal rings 5, urceolus 6, outage 8, throttling ring 9, pressure tap 11, base 12 inlets 13, throttling ring 14, groove A, high pressure chest B, adapter cavity C, low-pressure cavity
In automobile design, full scale vehicle collision is the important means of check vehicle safety performance.But the full scale vehicle collision experiment, because the expense height will strengthen the fee for survey of local parts.Need be constantly under true impact environment for parts such as safety air bag, safety strap, seats, the research of repetition test check and modification product and associated biomolecule mechanics is non-remunerative.This also is unfavorable for obtaining a certain reliability of products and dynamic mechanics parameter.Adopt coaster simulation full scale vehicle collision, reproduce true collision dynamic process, experimental expenses is cheap.It is very favorable for the design and the check of these products.With red flag " century is new " impact simulation is example, pass through real vehicle collision test, can obtain acceleration/accel, speed-time, the displacement curve of full scale vehicle collision, convert, can obtain the cooresponding resistance-displacement curve of coaster and energy absorber through force of inertia, relatively determine coaster quality 1500kg with real vehicle, by strength analysis and calculating,, determine the diameter 190mm of piston according to the hydraulic technique level, determine the internal diameter 190mm of urceolus, external diameter 210mm.Determine material 40Cr, internal diameter 80mm and the external diameter 100mm of drop bar by maximum impact.Directly determine the internal diameter 80mm of throttling ring by the internal diameter of drop bar.
According to interval area computing formula design calculation graduating stem of the present invention, its design process is as follows:
Obtain the positive computational mathematics model of full scale vehicle collision data (speed, acceleration/accel, displacement waveform) → carry out coaster and energy saver force analysis → energy absorber → energy-conservation bar profile calculating → energy-conservation bar profile adjustment → hydraulic pressure coefficient experimental fit → energy absorber reverse side computational mathematics model → calculating coaster waveform → be processed at last product.
According to design calculation and test repeatedly, determine the liquid stream COEFFICIENT K of system
1=1.34, determine the size of graduating stem.Press graduating stem leading dimensions processing graduating stem.What design was relevant with manufacturing is connected and the leak free parts, finishes the assembly of energy absorber.According to user's needs,, design different graduating stems to different collision velocitys and collision mass.Design the different support bodys that is connected according to client's the proving ground and the actual conditions of coaster.
By test, the speed that coaster is accelerated to appointment is clashed into (between adds enough padded coamings), the inertia loading process of approximate reproduction auto against.This equipment does not provide a dynamic process that reproduces vehicle collision for safety air bag, safety strap, seat etc. are not subjected to the facility of vehicle collision deformation effect.
Restricting rod type experiment simulated automotive crash device is matching used with simulative pulley, be used for the acceleration/accel that subtracts of simulated automotive collision, make coaster produce the acceleration waveform identical with real vehicle, be made up of urceolus 5, impact piston bar 1, graduating stem 8 etc., impact piston bar 1 is contained in the urceolus 5, and variable cross section throttling rod 8 links to each other with base 11, and be contained in the impact piston bar 1, head is equipped with seal ring 7, and guide collar 3 and the seal ring made from copper material 4 is equipped with at the top of outer letter 5, and is then fixing with fastener 2.Design variable cross section throttling rod 1 according to test requirements document, because of the diameter of throttling ring 13 is so that sectional area that unmodified changes graduating stem can change the interval area between throttling ring and the graduating stem, the controlling liquid resistance, during test, move impact piston bar 1 to assigned address, left end bears the impact from coaster, throttling ring and gap graduating stem between of liquid in the middle of piston that is full of in the right-hand member pistons end extruding high pressure chest A space flows into adapter cavity B, flow into low-pressure cavity C by liquid flow hole again, unnecessary liquid is discharged from outage 6.Before the test, inject liquid, piezoelectric transducer is installed on pressure tap 9 in the debug process is used for monitoring that the pressure in the urceolus 5 changes from feed liquor valve 12.
Through restricting rod type experiment simulated automotive Collision test, thereby on coaster, reproduce the crash dynamics process of this real vehicle, obtain the accelerating curve that subtracts of coaster simulated automotive.
The present invention compared with prior art has the following advantages: 1) can simulate bumping of different automobile types Hit acceleration waveform, and repeatability is fine, the precision height; 2) design program simply, be easy to Operation. The reliability height, security is good; 3) apparatus structure compactness, volume is little, the installation and debugging letter Single, for ease of maintenaince maintenance; 4) test and equipment cost are low.
Claims (4)
1, a kind of restricting rod type experiment simulated automotive collision test device, it is characterized in that the impact piston bar (1) that variable cross section throttling rod (8) is housed is contained in the urceolus (5), variable cross section throttling rod (8) links to each other with base (11), throttling ring (13) is contained in pistons end, leaves the gap between throttling ring (13) and the variable cross section throttling rod (8).
2,, it is characterized in that the interval area between throttling ring and the variable cross section throttling rod is according to the described restricting rod type experiment simulated automotive of claim 1 collision test method:
3, restricting rod type experiment simulated automotive crash tests device according to claim 1 is characterized in that described variable cross section throttling rod (8) can be provided with change size groove (14) on the equal diameter graduating stem.
4, a kind of method of using restricting rod type experiment simulated automotive collision test device, it is characterized in that colliding the impact piston bar that is contained in the urceolus with simulative pulley, liquid in the pistons end extruding high pressure chest of impact piston bar, liquid flows into low-pressure cavity through the throttling ring and the gap between variable cross section throttling rod of pistons end, change the interval area between throttling ring and the variable cross section throttling rod, fluid pressure in the control high pressure chest is regulated the resistance that impact piston pole pair coaster produces, and obtains the accelerating curve that subtracts of coaster simulated automotive collision.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011019069A CN1133873C (en) | 2001-01-18 | 2001-01-18 | Restricting rod type experiment apparatus and method for simulating car collision |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011019069A CN1133873C (en) | 2001-01-18 | 2001-01-18 | Restricting rod type experiment apparatus and method for simulating car collision |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1302743A true CN1302743A (en) | 2001-07-11 |
| CN1133873C CN1133873C (en) | 2004-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011019069A Expired - Fee Related CN1133873C (en) | 2001-01-18 | 2001-01-18 | Restricting rod type experiment apparatus and method for simulating car collision |
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| Country | Link |
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| CN (1) | CN1133873C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086440A1 (en) * | 2001-04-23 | 2002-10-31 | Yu, Tao | Trolley for simulating vehicle impacting |
| CN100545617C (en) * | 2006-05-23 | 2009-09-30 | 比亚迪股份有限公司 | Acceleration imitation platform |
| CN101271050B (en) * | 2007-03-23 | 2010-10-13 | 宝山钢铁股份有限公司 | Vehicle B column impact material selection method an device |
| CN103217975A (en) * | 2013-05-06 | 2013-07-24 | 湖南大学 | Algorithm verification test device for air bag restraint system controller |
| CN103959034A (en) * | 2012-01-26 | 2014-07-30 | 三菱重工业株式会社 | Automobile crash simulation test apparatus, and method of controlling automobile crash simulation test |
-
2001
- 2001-01-18 CN CNB011019069A patent/CN1133873C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002086440A1 (en) * | 2001-04-23 | 2002-10-31 | Yu, Tao | Trolley for simulating vehicle impacting |
| CN100545617C (en) * | 2006-05-23 | 2009-09-30 | 比亚迪股份有限公司 | Acceleration imitation platform |
| CN101271050B (en) * | 2007-03-23 | 2010-10-13 | 宝山钢铁股份有限公司 | Vehicle B column impact material selection method an device |
| CN103959034A (en) * | 2012-01-26 | 2014-07-30 | 三菱重工业株式会社 | Automobile crash simulation test apparatus, and method of controlling automobile crash simulation test |
| CN103217975A (en) * | 2013-05-06 | 2013-07-24 | 湖南大学 | Algorithm verification test device for air bag restraint system controller |
| CN103217975B (en) * | 2013-05-06 | 2015-06-03 | 湖南大学 | Algorithm verification test device for air bag restraint system controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1133873C (en) | 2004-01-07 |
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According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 1101906.9 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 1201813.9 utility model patent to be given up, and in the 20 volume of the 1 issue of the new type of communique on the patent right to abandon the announcement. |
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