CN105784347A - System and method for testing dynamic characteristics of helical spring - Google Patents
System and method for testing dynamic characteristics of helical spring Download PDFInfo
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- CN105784347A CN105784347A CN201610250622.9A CN201610250622A CN105784347A CN 105784347 A CN105784347 A CN 105784347A CN 201610250622 A CN201610250622 A CN 201610250622A CN 105784347 A CN105784347 A CN 105784347A
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- G01M13/00—Testing of machine parts
Abstract
The invention relates to a system for testing the dynamic characteristics of a helical spring. The system comprises a pedestal, a vertical vibration bench, a displacement sensor, a spring clamp, two sets of force sensors contacted with two ends of the helical spring to be tested, accelerometers fixed to each wound spring of the helical spring to be tested, and signal acquisition and processing devices connected with each sensor, wherein the vertical vibration bench and the spring clamp are fixed on the pedestal, a first load-bearing platform and a second load-bearing platform are respectively arranged on the excitation end of the vertical vibration bench and the spring clamp, the helical spring to be tested is pre-compressed by adjusting the distance between the first load-bearing platform and the second load-bearing platform, the displacement sensor is arranged on the second load-bearing platform, and the two sets of force sensors are respectively arranged on the first load-bearing platform and the second load-bearing platform. Compared with the prior art, the system has the advantages of wide application scope, simple clamping procedure and wide excitation frequency band, and dynamic parameters of helical springs under different pre-compression amount and different vibration amplitude can be tested.
Description
Technical field
The present invention relates to dynamic characteristic test technical field, especially relate to a kind of helical spring dynamic characteristic (including both ends of the spring dynamic stiffness and modal parameter thereof) and test System and method for.
Background technology
In current dynamics of vehicle models, all coil springs units all represent with the constant Static stiffness value parameter simplified without quality, and this is applicable in the dynamic analysis for below 20Hz.But, along with improving constantly of the speed of service, driving frequency continues to increase, vibration frequency band is widened, vibrational excitation frequency suffered by vehicle structure also increases substantially, conventional spring Static stiffness parameter model is no longer able to accurate expression system characteristic, thus extremely it is necessary that the dynamic characteristic of the helical spring to suspension carries out test determination, to provide for vehicle dynamics simulation and to hang dynamic characteristic parameter accurately, better for the calculating of dynamics of vehicle performance and assessment, provide foundation for the design of Car design especially hot-short.
Nowadays there are many scholars to emulate angle from theoretical and dynamics software and the dynamic characteristic of helical spring has been carried out the research of different angles in various degree, as established the kinetic model of the cylindrically coiled spring being made by different spring silks, and utilize this mode inference to go out the deflection of each circle helical spring and the time history curve of speed and acceleration thereof, and prove that the phantom of the type can provide theories integration for the design of helical spring by special test.When the ratio of spring filament diameter Yu mean diameter of coil is less, the dynamic differential equation of existing helical spring is carried out gradual analysis, it is determined that about the notable coefficient of wave equation.The dynamic analysis that these researchs are helical spring provides theoretical basis, but the rigidity test currently for vehicle hanging helical spring remains in low-frequency range, and the method and system that relatively the dynamic characteristic to helical spring of specification is not tested.Additionally, relevant document also discloses that method of testing and the system of dynamic rate, these method of testings and system are effective just for ad hoc structure (such as rail, track switch etc.), versatility is strong, fresh so far it has been proposed that the method for testing that is specifically designed in railway vehicle suspension system and automobile suspension system the adjustable dynamic characteristic of helical spring pre compressed magnitude and system.In addition, owing to helical spring exists fluctuation effect, under excitation, produce resonance inside himself cause that the dynamic rate value of both ends of the spring is different, there is no people at present and consider this factor.Based on this, the present invention proposes a kind of System and method for that can measure helical spring dynamic characteristic parameter, is mainly used in various helical spring, mainly includes the mensuration of the dynamic characteristic parameter of helical compression steel spring in single stage suspension structure of rail car.
Chinese patent CN101666730B discloses a kind of vibration characteristics test instrunment and method of testing thereof, and its technical scheme is: the equipment of testing vibration performance of air spring, including Electrodynamic Vibrators, laser displacement sensor, acceleration transducer and force transducer；Signal generator and power amplifier are connected by electric signal with Electrodynamic Vibrators successively；Its signal is delivered to after charge amplifier carries out signal amplification by laser displacement sensor, acceleration transducer and force transducer, is then stored in computer；The unsettled setting of Electrodynamic Vibrators；The signal of charge amplifier is introduced into data collecting system, enters described computer then through data collecting system.This patent, for air spring system, adopts electric activator that empty spring one end is carried out power excitation, is respectively mounted 2 acceleration transducers, 1 force transducer and 2 displacement transducers, only obtains sky spring one end movement and acceleration responsive.It is loaded down with trivial details and accurate not that it adopts mass to regulate spring precommpression value program by mass size.In empty spring one end, loading force tests this place's displacement and accekeration, the shape overall due to spring and height, only obtains the vibratory response of one end and just represents the vibration characteristics of whole air spring and be inaccurate, excessively simplifies.The defect that this patent exists includes: only for air spring system, pre compressed magnitude regulates not accurate enough, test target is only displacement and the acceleration responsive of air spring one end, spring body vibration characteristic can not be reflected, cannot obtain including the spring inherent character parameter of spring dynamic stiffness value, the required dynamic characteristic parameter of offer of more can not analyzing and researching further for its frame for movement installed.
Summary of the invention
Defect that the purpose of the present invention is contemplated to overcome above-mentioned prior art to exist and provide a kind of have applied widely, clamping operation succinct and the helical spring dynamical property test system of the advantage such as excitation frequency band width and method of testing, it may be achieved the mensuration of dynamic parameter under helical spring difference pre compressed magnitude difference vibration amplitude.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of helical spring dynamical property test system, for testing the dynamic property of the helical spring of different length and pre compressed magnitude, including pedestal, vertical vibration table, displacement transducer, spring perch, for two groups of force transducers with helical spring two end in contact to be measured, it is fixed on the acceleration transducer on helical spring to be measured each ring spring bar and the signal acquisition and processing apparatus being connected with each sensor, described vertical vibration table and spring perch are each attached on pedestal, the excitation end of described vertical vibration table and spring perch are respectively equipped with the first carrying platform and the second carrying platform, by the distance regulated therebetween, helical spring to be measured is carried out precommpression, described displacement transducer is arranged on the second carrying platform, two groups of force transducers are separately positioned on the first carrying platform and the second carrying platform.
Described spring perch includes crossbeam and curb girder, and one end of curb girder is fixed on pedestal, and the other end is connected with crossbeam by the connecting plate of bolt and variable thickness, by the distance between thickness adjusted the first carrying platform and second carrying platform of change connecting plate.
Described crossbeam is formed by two H profile steel chain intermittent weld.
Described curb girder is welded, by four channel-section steels, the day character form structure formed.
The first described carrying platform and the second carrying platform are respectively through on the excitation end and the crossbeam that are bolted to vertical vibration table.
Often group force transducer forms by three force transducers, and three force transducers are isosceles triangle arrangement, are uniformly distributed along helical spring end circle to be measured.
Described displacement transducer is laser displacement sensor, is oppositely arranged with the first carrying platform.
Described acceleration transducer is three-way vibration acceleration transducer.
A kind of adopt described helical spring dynamical property test system to carry out the method tested, comprise the following steps:
(1) acceleration transducer is separately fixed on each ring spring bar of helical spring to be measured, then helical spring to be measured is placed between the first carrying platform and the second carrying platform, two ends contact with the force transducer being arranged on each carrying platform respectively, by regulating the distance between the first carrying platform and the second carrying platform, the pre compressed magnitude of helical spring to be measured are adjusted；
(2) controlling vertical vibration table makes excitation end produce random sinusoidal vibration, signal acquisition and processing apparatus to helical spring two ends to be measured force-responsive, excitation end movement input, each ring spring bar is vertical and radial vibration acceleration responsive signal is acquired and post processing, obtains the spring Mode Shape under the two ends dynamic stiffness characteristic of helical spring to be measured and constraint operating mode and model frequency value.
The amplitude of random sinusoidal vibration of the excitation end of vertical vibration table is 0.025～51mm, frequency is 5～2500Hz, and the amplitude of vibration is less than the pre compressed magnitude of helical spring to be measured.
It is helical spring that the present invention tests object, test target is some rigidity and transmission two dynamic rate values of rigidity at helical spring upper and lower two ends place, rather than the vibratory response of spring self one end, and the spring modal parameter obtained under the fixed boundary condition of two ends can be tested simultaneously.Secondly, the present invention proposes to adopt the spring perch that crossbeam and curb girder connect to form that helical spring to be measured is retrained, and utilizes the sheet devices that connects of variable thickness to reach accurately to regulate the purpose of spring precommpression to be measured height to the pre-load amount arranging spring.In addition, what the present invention adopted is the direct displacement input of vertical vibration excitation system, it is respectively provided with 3 force transducers at the upper and lower two ends of helical spring and is uniformly and symmetrically distributed in isosceles triangle along spring one circle, reach the effect of bearing coil 3 and force transducer contact equilibrium, reduce the load data error that test system collects as far as possible, improve measuring accuracy further.
The present invention is for ensureing that helical spring one end to be measured is fixed, excited vibration freely input bit can be moved in one end, utilizes H profile steel beam as crossbeam, and grooved girder steel is as curb girder, the bolt adopting high intensity between crossbeam and curb girder connects, and adopts the foundation bolt of high intensity to be connected between curb girder with pedestal.The first carrying platform and the spacing of the second carrying platform is regulated by changing the thickness of connecting plate between curb girder and crossbeam, realize the adjustment of the decrement that helical spring to be measured is different, ensure the whole process of the test of helical spring is in compressive state more than the amplitude of sinusoidal vibration by pre compressed magnitude.
Displacement lasers sensor in the present invention is positioned on the second carrying platform on spring perch, test process keep fixing, coordinate with the first carrying platform, record the relative displacement between two carrying platforms, such that it is able to the relative displacement recorded between helical spring two ends；Force transducer lays respectively at the force-responsive for recording helical spring two ends；Acceleration transducer is positioned on each ring spring bar, it is possible to record the vertical vibratory response with radial direction of each ring spring bar under this operating mode.
This test system excitation end by vertical vibration table, to the sinusoidal displacement excitation applying specific peaks, characteristic frequency bottom helical spring to be measured, lower spring end actual displacement x and upper and lower two ends force signal F can be gathered by the force transducer of the laser displacement sensor affixed with the second carrying platform and helical spring upper and lower two ends place1And F2, dynamic rate (the some stiffness K of helical spring can be drawn by following formulapWith transmission stiffness Kt) value curve:
This set test system excitation end by vertical vibration table, can to the sinusoidal displacement excitation applying specific peaks, characteristic frequency bottom helical spring to be measured, each ring spring bar vibratory response and the transmission function based on bottom displacement under this operating mode can be obtained by the three-way vibration acceleration transducer consolidated with helical spring to be measured each ring spring bar, and then the elastic modal parameters of helical spring to be measured under this operating mode can be obtained.
Compared with prior art, present invention have the advantage that
(1) applied widely: the mensuration of the dynamic characteristic (both ends of the spring dynamic rate value and elastic modal parameters) of present invention helical spring (group) element suitable in various rail vehicles and automotive system.
(2) clamping operation is succinct: owing to displacement transducer is positioned on the second carrying platform on support, and fixing in measurement process, certainty of measurement is high；Force transducer mounting means is simple, and this makes helical spring clamping operation few, it is simple to operation；First carrying platform and the second carrying platform are bolted with the excitation end of vertical vibration table and crossbeam respectively, easy-to-dismount while, this set Special clamp tool is suitable for the mensuration of different helical spring dynamic characteristic, has again certain universal flexible on special basis.
(3) excitation frequency band width: the electric vibration experiment excitation range in the present invention is 5～2500Hz, can be adjusted according to different pre compressed magnitude springs, it is ensured that enough helical spring dynamic frequencies use scope.
(4) test accuracy is high: the vertical vibration table of the present invention is electric vertical vibration table, and driving frequency least unit is 0.005Hz, and laser displacement sensor resolution is 0.005mm, and test excitation and test result precision are high.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of the present invention；
Fig. 2-1 is the main TV structure schematic diagram of the present invention；
Fig. 2-2 is the distribution schematic diagram of one group of force transducer on the first carrying platform；
Fig. 3 is the structural representation of the crossbeam of the present invention；
Fig. 4 is the left view structural representation of the crossbeam of the present invention；
Fig. 5 is the structural representation of the curb girder of the present invention；
Fig. 6 is the plan structure schematic diagram of the curb girder of the present invention；
Fig. 7 is the structural representation of the second carrying platform；
Fig. 8 is the power during helical spring test of the embodiment of the present invention 1, displacement signal time domain and frequency domain result of the test figure；
Fig. 9 is the dynamic point rigidity value curve of the helical spring of the embodiment of the present invention 1；
Figure 10 is the dynamically transmission rigidity value curve of the helical spring of the embodiment of the present invention 1；
Figure 11 is certain first-order modal bending vibation mode picture (containing modal parameter) of the helical spring of the embodiment of the present invention 1.
In figure, 1 is vertical vibration table, and 2 is crossbeam, and 21 is H profile steel, and 3 is curb girder, and 31 is channel-section steel, and 4 is pedestal, and 5 is connecting plate, and 6 is the second carrying platform, and 7 is the first carrying platform, and 8 is helical spring to be measured, and 9 is force transducer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
A kind of helical spring dynamical property test system, for testing the dynamic property of helical spring, fundamental diagram is as shown in Figure 1, composition structural representation such as shown in Fig. 2-1, including pedestal 4, vertical vibration table 1, displacement transducer, special fixture, for two groups of force transducers 9 of 8 liang of end in contact of helical spring to be measured, the acceleration transducer being fixed on helical spring 8 to be measured each ring spring bar and the signal acquisition and processing apparatus being connected with each sensor.Wherein, vertical vibration table 1 is fixed on pedestal 4, the excitation end of vertical vibration table 1 has been bolted the first carrying platform 7, special fixture includes crossbeam 2 and curb girder 3, crossbeam 2 is formed by two H profile steel 21 chain intermittent weld, it has been bolted the second carrying platform 6, first carrying platform 7 and the second carrying platform 6 are oppositely arranged, curb girder 3 is welded, by four channel-section steels 31, the day character form structure formed, one end is fixed on pedestal 4 by foundation bolt and bottom connecting plate, the other end is connected with crossbeam 2 by the connecting plate 5 of bolt and variable thickness, connecting plate 5 is arranged between crossbeam 2 and curb girder 3, by the distance between thickness adjusted the first carrying platform 7 and second carrying platform 6 of control connecting plate 5.Displacement transducer is laser displacement sensor, it is oppositely arranged with the first carrying platform 7, reflect the distance change between the first carrying platform 7 and the second carrying platform 6, such that it is able to the relative displacement recorded between helical spring 8 two ends to be measured, two groups of force transducers 9 are separately positioned on the first carrying platform 7 and the second carrying platform 6, often group force transducer 9 forms by three force transducers 9, three force transducers are isosceles triangle arrangement, it is uniformly distributed along helical spring end circle to be measured, force transducer 9 on first carrying platform 7 is distributed as shown in Fig. 2-2, acceleration transducer adopts three-way vibration acceleration transducer, it is used for measuring the vertical vibratory response with radial direction of each ring spring bar.
Helical spring to be measured 8 in the present embodiment is coil spring in certain type bullet train primary spring axle box.
H profile steel 21 model in the present embodiment is 200mm × 200mm, two butt welding arranged side by side during use, and the sectional dimension of the crossbeam 2 of formation is 400mm × 200mm, as shown in figs. 34；Channel-section steel 31 model is 14#a, sectional dimension 140mm × 58mm, four butt welding during use, and the curb girder 3 of formation is in day character form structure, and sectional dimension 280mm × 116mm, crossbeam 2 two ends respectively set one, as shown in Fig. 5～6；The sectional dimension of the bottom connecting plate between curb girder 3 and pedestal 4 is 200mm × 400mm, thickness 10mm, and one end is welded with curb girder 3, and other end and pedestal 4 are by foundation bolt concrete mutually；Connecting plate 5 is of a size of 200mm × 400mm, thickness 10mm, is connected by bolt with crossbeam 2 and curb girder 3；First carrying platform 7 is of a size of 400mm × 400mm, thickness 10mm, and one end is connected by soket head cap screw with the excitation end of vertical vibration table 1, and the other end mutually extrudes with the force transducer 9 of helical spring 8 lower end to be measured and contacts；Second carrying platform 6 is of a size of 400mm × 400mm, thickness 10mm, as it is shown in fig. 7, one end is connected by bolt with crossbeam 2, other end mutually extrudes with the force transducer 9 of helical spring 8 upper end to be measured and contacts.
The operation principle of this test system is as shown in Figure 1, signal acquisition and processing apparatus includes data collecting card and computer, signal generator is passed through in the vibration of the excitation end of vertical vibration table, controller and power amplifier control, signal generator produces pumping signal, by controller and power amplifier, it is applied on vertical vibration table, the excitation end of vertical vibration table produces vibration, acceleration transducer and displacement transducer on helical spring spacer ring spring bar to be measured transmit signals to data collecting card, signal is transferred to data collecting card by force transducer after front-end amplifier amplifies, then each data entrance computer system processes.
Adopt this helical spring dynamical property test system to carry out the method tested, comprise the following steps:
(1) acceleration transducer is rigidly fixed in respectively on each ring spring bar of helical spring 8 to be measured, then helical spring 8 to be measured is placed between the first carrying platform 7 and the second carrying platform 6, two ends contact with the force transducer being arranged on each carrying platform respectively, and the pre compressed magnitude of helical spring 8 to be measured is adjusted by the distance regulated between the first carrying platform 7 and the second carrying platform 6；
(2) the random sinusoidal vibration of vertical vibration table 1 make excitation end produce amplitude to be 0.025～51mm, frequency be 5～2500Hz is controlled, and the amplitude of vibration is less than the pre compressed magnitude of helical spring to be measured, signal acquisition and processing apparatus to helical spring 8 two ends to be measured force-responsive, excitation end movement input, each ring spring bar is vertical and radial vibration acceleration responsive signal is acquired and post processing, obtains the spring Mode Shape under the two ends dynamic stiffness characteristic of helical spring 8 to be measured and constraint operating mode and model frequency value.
Fig. 8 is under certain frequency excitation amplitude, helical spring lower end, upper end force signal, lower end displacement signal time-domain and frequency-domain result.It is available for the single power of frequency after the signal that data process processes after filtering and displacement signal from Fig. 8, so can ensure that the data collected obtain the accuracy of Fig. 9 and Figure 10 dynamic stiffness value curve by Rigidity Calculation formula.
From the point of Fig. 9 and Figure 10 respectively helical spring and transmission dynamic stiffness, in low-frequency range, the dynamic rate (some rigidity and transmission rigidity value) of (about 20Hz) helical spring is less compared with the change of Static stiffness value as seen from the figure, raising along with driving frequency, dynamic rate value presents the big ups and downs change of multiple order of magnitude, the High Frequency Dynamic parameter of spring is obtained by this test, and this provides test parameters for Full Vehicle Dynamics Performance Calculation.
Figure 11 is helical spring mode test result under the boundary condition that precommpression and two ends are fixed, corresponding to certain order mode state bending vibation mode picture therein and model frequency value, damping ratios result.
Claims (10)
1. a helical spring dynamical property test system, for testing the dynamic property of the helical spring of different length and pre compressed magnitude, it is characterized in that, including pedestal, vertical vibration table, displacement transducer, spring perch, for two groups of force transducers with helical spring two end in contact to be measured, it is fixed on the acceleration transducer on helical spring to be measured each ring spring bar and the signal acquisition and processing apparatus being connected with each sensor, described vertical vibration table and spring perch are each attached on pedestal, the excitation end of described vertical vibration table and spring perch are respectively equipped with the first carrying platform and the second carrying platform, by the distance regulated therebetween, helical spring to be measured is carried out precommpression, described displacement transducer is arranged on the second carrying platform, two groups of force transducers are separately positioned on the first carrying platform and the second carrying platform.
2. a kind of helical spring dynamical property test system according to claim 1, it is characterized in that, described spring perch includes crossbeam and curb girder, one end of curb girder is fixed on pedestal, the other end is connected with crossbeam by the connecting plate of bolt and variable thickness, by the distance between thickness adjusted the first carrying platform and second carrying platform of change connecting plate.
3. a kind of helical spring dynamical property test system according to claim 2, it is characterised in that described crossbeam is formed by two H profile steel chain intermittent weld.
4. a kind of helical spring dynamical property test system according to claim 2, it is characterised in that described curb girder is welded, by four channel-section steels, the day character form structure formed.
5. a kind of helical spring dynamical property test system according to claim 2, it is characterised in that the first described carrying platform and the second carrying platform are respectively through on the excitation end and the crossbeam that are bolted to vertical vibration table.
6. a kind of helical spring dynamical property test system according to claim 1, it is characterised in that often group force transducer forms by three force transducers, three force transducers are isosceles triangle arrangement, are uniformly distributed along helical spring end circle to be measured.
7. a kind of helical spring dynamical property test system according to claim 1, it is characterised in that described displacement transducer is laser displacement sensor, is oppositely arranged with the first carrying platform.
8. a kind of helical spring dynamical property test system according to claim 1, it is characterised in that described acceleration transducer is three-way vibration acceleration transducer.
9. one kind adopts the method that the arbitrary described helical spring dynamical property test system of claim 1～8 carries out testing, it is characterised in that comprise the following steps:
(1) acceleration transducer is separately fixed on each ring spring bar of helical spring to be measured, then helical spring to be measured is placed between the first carrying platform and the second carrying platform, two ends contact with the force transducer being arranged on each carrying platform respectively, by regulating the distance between the first carrying platform and the second carrying platform, the pre compressed magnitude of helical spring to be measured are adjusted；
(2) controlling vertical vibration table makes excitation end produce random sinusoidal vibration, signal acquisition and processing apparatus to helical spring two ends to be measured force-responsive, excitation end movement input, each ring spring bar is vertical and radial vibration acceleration responsive signal is acquired and post processing, obtains the spring Mode Shape under the two ends dynamic stiffness characteristic of helical spring to be measured and constraint operating mode and model frequency value.
10. a kind of method adopting helical spring dynamical property test system to carry out testing according to claim 9, it is characterized in that, the amplitude of random sinusoidal vibration of the excitation end of vertical vibration table is 0.025～51mm, frequency is 5～2500Hz, and the amplitude of vibration is less than the pre compressed magnitude of helical spring to be measured.
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| CN106768942A (en) * | 2016-12-16 | 2017-05-31 | 哈尔滨工业大学 | Experiment test platform for demarcating rotary-type flexible member rigidity, damping characteristic |
| CN106872288A (en) * | 2017-01-16 | 2017-06-20 | 株洲时代新材料科技股份有限公司 | Air spring is across test shearing dynamic stiffness experimental rig and a test method |
| CN107356317A (en) * | 2017-08-21 | 2017-11-17 | 兰州交通大学 | Shear wave attenuation measurement device and method |
| CN109029883A (en) * | 2018-07-26 | 2018-12-18 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of spring rate measurement experimental rig |
| RU2676220C1 (en) * | 2017-12-22 | 2018-12-26 | Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Казанский Национальный Исследовательский Технический Университет Им. А.Н. Туполева-Каи", Книту-Каи | Spiral springs moment automated meter |
| CN110470439A (en) * | 2018-05-11 | 2019-11-19 | 东风德纳车桥有限公司 | A kind of air spring rigidity characteristic test system and method |
| CN110470440A (en) * | 2019-06-12 | 2019-11-19 | 宁波高悦精密机械有限公司 | A kind of elastomer performance test equipment and elastomer performance test method |
| CN112903222A (en) * | 2020-12-25 | 2021-06-04 | 日照华斯特林科技有限公司 | System and method for measuring quality of deformation part of plate spring |
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| CN106197912A (en) * | 2016-08-26 | 2016-12-07 | 常州市莱特气弹簧有限公司 | Stiffness test device with auxiliary chamber air spring |
| CN106768942A (en) * | 2016-12-16 | 2017-05-31 | 哈尔滨工业大学 | Experiment test platform for demarcating rotary-type flexible member rigidity, damping characteristic |
| CN106872288A (en) * | 2017-01-16 | 2017-06-20 | 株洲时代新材料科技股份有限公司 | Air spring is across test shearing dynamic stiffness experimental rig and a test method |
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| CN107356317B (en) * | 2017-08-21 | 2023-04-07 | 兰州交通大学 | Transverse wave attenuation measuring device and method |
| CN107356317A (en) * | 2017-08-21 | 2017-11-17 | 兰州交通大学 | Shear wave attenuation measurement device and method |
| RU2676220C1 (en) * | 2017-12-22 | 2018-12-26 | Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Казанский Национальный Исследовательский Технический Университет Им. А.Н. Туполева-Каи", Книту-Каи | Spiral springs moment automated meter |
| CN110470439A (en) * | 2018-05-11 | 2019-11-19 | 东风德纳车桥有限公司 | A kind of air spring rigidity characteristic test system and method |
| CN109029883A (en) * | 2018-07-26 | 2018-12-18 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of spring rate measurement experimental rig |
| CN109029883B (en) * | 2018-07-26 | 2020-06-30 | 中国航空工业集团公司沈阳飞机设计研究所 | Spring stiffness measurement test device |
| CN110470440A (en) * | 2019-06-12 | 2019-11-19 | 宁波高悦精密机械有限公司 | A kind of elastomer performance test equipment and elastomer performance test method |
| CN115135899A (en) * | 2020-03-24 | 2022-09-30 | 日立安斯泰莫株式会社 | Coil spring clamp, manufacturing method of coil spring and testing method of coil spring |
| CN115135899B (en) * | 2020-03-24 | 2024-01-23 | 日立安斯泰莫株式会社 | Coil spring clamp, manufacturing method of coil spring and testing method of coil spring |
| CN112903222B (en) * | 2020-12-25 | 2022-09-30 | 日照华斯特林科技有限公司 | System and method for measuring quality of deformation part of plate spring |
| CN112903222A (en) * | 2020-12-25 | 2021-06-04 | 日照华斯特林科技有限公司 | System and method for measuring quality of deformation part of plate spring |
| CN113358304A (en) * | 2021-06-02 | 2021-09-07 | 苏州睿策汽车零部件有限公司 | Comprehensive testing system and method for spiral spring |
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