CN106908205A - A kind of test device of engine mounting dynamic stiffness - Google Patents
A kind of test device of engine mounting dynamic stiffness Download PDFInfo
- Publication number
- CN106908205A CN106908205A CN201710138408.9A CN201710138408A CN106908205A CN 106908205 A CN106908205 A CN 106908205A CN 201710138408 A CN201710138408 A CN 201710138408A CN 106908205 A CN106908205 A CN 106908205A
- Authority
- CN
- China
- Prior art keywords
- suspension
- data collecting
- vibrator
- measured
- collecting systems
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0066—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by exciting or detecting vibration or acceleration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0075—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by means of external apparatus, e.g. test benches or portable test systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a kind of test device of engine mounting dynamic stiffness, belong to Vehicular vibration testing field.Including the control system being made up of 32 passage LMS data collecting systems and power amplifier, the excitation system being made up of vibrator, exciting rod and power hammer, force snesor and acceleration transducer, suspension to be measured, mass, pedestal and bolt are preloaded.Control system control vibrator produces exciting force simulated engine dynamic loading, and sensor collection is responded and is transmitted to LMS data collecting systems, and the dynamic stiffness that data processing obtains suspension to be measured is carried out in LMS data collecting systems.Compared with prior art, the present invention is using vibrator loading, can more accurate simulated engine be suspended at stressing conditions under actual working state, more accurate dynamic stiffness value can be obtained, with promotional value higher.
Description
Technical field
The present invention relates to a kind of test device of engine mounting dynamic stiffness, belong to Vehicular vibration testing field.
Background technology
In recent years, auto NVH performance is increasingly taken seriously, and Engine Mounting System connects power assembly and vehicle frame elasticity
Connect, the two-way isolation can be carried out to the vibration between power assembly and vehicle frame.Therefore, the design quality of Engine Mounting System is straight
Connect and have influence on transmission of the engine luggine to vehicle frame, influence the NVH performances of vehicle.
Engine work, the active force to suspending is dynamic loading, therefore to the energy of resistance to deformation under suspension dynamic loading
Probing into for power, i.e. dynamic stiffness has very strong practical significance to the improvement of suspension system.
Prior art is mainly firmly leadman's work and taps suspension to simulate dynamic loading, and the precision of test is low.Now with sharp
The device that shakes produces self-defined exciting force to simulate.
The content of the invention
Present invention aim to address the low problem of engine mounting dynamic stiffness measuring accuracy, there is provided a kind of engine mounting
The test device of dynamic stiffness.
The purpose of the present invention is achieved through the following technical solutions.
A kind of test device of engine mounting dynamic stiffness, including control system, vibrator, exciting rod, power hammer, preloading
Mass, suspension to be measured, sensor, pedestal and bolt；
Annexation：
Control system includes 32 passage LMS data collecting systems and power amplifier；Power amplifier one end and 32 passages
LMS data collecting systems are connected, and the other end is connected with vibrator；
Pedestal top is sequentially placed suspension to be measured and preloads mass, then by bolt by suspension to be measured and preloading
Mass is fixedly mounted on pedestal；Different preloading can be applied to suspension to be measured by regulating bolt；Preload mass
Top is fixedly connected sequentially power hammer, exciting rod and vibrator；Suspended surface to be measured is connected with sensor；
The sensor includes force snesor and acceleration transducer；
The course of work：
Step has an active force when not working once, engine to suspension, and this active force is referred to as preloading.Pass through
Mass is preloaded to the active force that suspension applies to simulate preloading suffered by suspension, the size for preloading passes through regulating bolt
Pretightning force control.
When step 2, engine work, dynamic load effect is received in suspension.LMS data collecting systems send control signal, pass through
Power amplifier, control vibrator produces exciting force, exciting force to be hammered into shape by exciting rod and power and be applied in suspension, simulation suspension institute
The dynamic loading received, the loading direction of exciting force is consistent with suspension Impact direction.
Force snesor and acceleration transducer that step 3, suspended surface are installed, the power that will be collected and acceleration signal
Pass to LMS data collecting systems.
The power and acceleration information that step 4, LMS data collecting systems are gathered to step 3 are processed, and calculate the suspension
Dynamic stiffness.
Beneficial effect
Patent utilization vibrator of the present invention loading, can more accurate simulated engine be suspended at receiving under actual working state
Power situation, can obtain more accurate dynamic stiffness value.
Brief description of the drawings
Fig. 1 is that device constitutes figure；
Fig. 2 is workflow diagram；
Fig. 3 is the frequency response curve of embodiment test；
Fig. 4 is the test dynamic stiffness curve of embodiment；
Fig. 5 is the emulation dynamic stiffness curve of embodiment.
Wherein, 1-control system, 2-vibrator, 3-exciting rod, 4-power hammer, 5-preload mass, 6-it is to be measured
Suspension, 7-sensor, 8-pedestal, 9-bolt.
Specific embodiment
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment 1
The dynamic stiffness of the engine rubber suspension that certain military diesel machine research institute provides, including control are tested using the present invention
System 1, vibrator 2, exciting rod 3, power hammer 4, preloading mass 5, suspension 6, sensor 7 to be measured, pedestal 8 and bolt 9；As schemed
Shown in 1.
Annexation：
Control system 1 includes 32 passage LMS data collecting systems and power amplifier；Power amplifier one end and 32 passages
LMS data collecting systems are connected, and the other end is connected with vibrator 2；
The top of pedestal 8 is sequentially placed suspension 6 to be measured and preloads mass 5, then suspends 6 Hes by be measured by bolt 9
Preload mass 5 and be fixedly mounted on pedestal 8；Different preloading can be applied to suspension 6 to be measured by regulating bolt 9；In advance
The power that is fixedly connected sequentially above load mass block 5 hammer 4, exciting rod 3 and vibrator 2；6 surfaces of suspension to be measured are connected with sensor 7；
The sensor 7 includes force snesor and acceleration transducer；
The course of work, as shown in Figure 2：
Above suspension, the gravity of engine is born in suspension, therefore engine is not when working for step one, engine arrangement
Just there is an active force to suspension, this active force is referred to as preloading.By preloading the active force that mass applies to suspension
To simulate preloading suffered by suspension, the size for preloading is controlled by the pretightning force of regulating bolt.This suspension is corresponding
Engine quality is 1290Kg, the pretightning force of regulating bolt, until the power size that the force snesor in suspension is surveyed is 12900N,
Now complete the loading that suspension is preloaded.
When step 2, engine work, dynamic load effect is received in suspension.LMS data collecting systems send control signal, pass through
Power amplifier, control vibrator produces exciting force, exciting force to be hammered into shape by exciting rod and power and be applied in suspension, simulation suspension institute
The dynamic loading received, the loading direction of exciting force is consistent with suspension Impact direction.Analysis frequency is set in LMS data collecting systems
Section is 0~1000Hz, is loaded by test-sweep-with load.
Force snesor and acceleration transducer that step 3, suspended surface are installed, the power that will be collected and acceleration signal
Pass to LMS data collecting systems.After test-sweep-with load load test, Z-direction between two measuring points is obtained
That is the frequency response function (FRF) of vertical direction, including real part and imaginary part.Accompanying drawing 3 show the system input and output two that test is obtained
The frequency response curve of end points.
The power and acceleration information that step 4, LMS data collecting systems are gathered to step 3 are processed, and calculate the suspension
Dynamic stiffness.Fitting of a polynomial further is carried out to data, dynamic stiffness curve is finally given, as shown in Figure 4.On this basis,
The dynamic stiffness limited features unit simulation calculation within 1000Hz is carried out to the rubber mounting that this is tested, has obtained changing with frequency
Load-deflection curve, as shown in Figure 5.The comparative study of system is finally done, analysis finds that emulation data and test data become
Change curve basically identical, while numerical error can keep within the specific limits, illustrating suspension device for testing dynamic stiffness of the invention
It is feasible.
Claims (3)
1. a kind of test device of engine mounting dynamic stiffness, it is characterised in that：Including control system (1), vibrator (2), swash
Shake bar (3), power hammer (4), preloading mass (5), suspension to be measured (6), sensor (7), pedestal (8) and bolt (9)；
Control system (1) includes 32 passage LMS data collecting systems and power amplifier；Power amplifier one end and 32 passages
LMS data collecting systems are connected, and the other end is connected with vibrator (2)；
Pedestal (8) top is sequentially placed suspension to be measured (6) and preloading mass (5), then by bolt (9) by suspension to be measured
(6) and preload mass (5) be fixedly mounted on pedestal (8)；Can be applied not to suspension to be measured (6) by regulating bolt (9)
Same preloads；Preload be fixedly connected sequentially above mass (5) power hammer (4), exciting rod (3) and vibrator (2)；It is to be measured outstanding
Put (6) surface and be connected with sensor (7).
2. a kind of test device of engine mounting dynamic stiffness as claimed in claim 1, it is characterised in that：The sensor
(7) including force snesor and acceleration transducer.
3. a kind of test device of engine mounting dynamic stiffness as claimed in claim 1 or 2, it is characterised in that：Described device
Test process be：
Step has an active force when not working once, engine to suspension, and this active force is referred to as preloading；By pre-add
Charge material gauge block simulates preloading suffered by suspension to the active force that suspension applies, and the size for preloading is pre- by regulating bolt
Clamp force is controlled；
When step 2, engine work, dynamic load effect is received in suspension；LMS data collecting systems send control signal, through overpower
Amplifier, control vibrator produces exciting force, exciting force to be hammered into shape by exciting rod and power and be applied in suspension, suffered by simulation suspension
Dynamic loading, the loading direction of exciting force is consistent with suspension Impact direction；
Force snesor and acceleration transducer that step 3, suspended surface are installed, the power that will be collected and acceleration signal are transmitted
Give LMS data collecting systems；
The power and acceleration information that step 4, LMS data collecting systems are gathered to step 3 are processed, and calculate the dynamic firm of the suspension
Degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138408.9A CN106908205A (en) | 2017-03-09 | 2017-03-09 | A kind of test device of engine mounting dynamic stiffness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138408.9A CN106908205A (en) | 2017-03-09 | 2017-03-09 | A kind of test device of engine mounting dynamic stiffness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106908205A true CN106908205A (en) | 2017-06-30 |
Family
ID=59186951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710138408.9A Pending CN106908205A (en) | 2017-03-09 | 2017-03-09 | A kind of test device of engine mounting dynamic stiffness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106908205A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141719A (en) * | 2018-09-10 | 2019-01-04 | 宁波拓普集团股份有限公司 | A kind of device and its measurement method that measurement automobile power assembly suspension system is preloading |
| CN113639942A (en) * | 2021-07-12 | 2021-11-12 | 江铃汽车股份有限公司 | Dynamic stiffness evaluation and test method for vehicle body attachment point |
| CN114136667A (en) * | 2021-11-16 | 2022-03-04 | 东风汽车集团股份有限公司 | Device and method for testing dynamic stiffness of vehicle body suspension in Y direction |
| CN115219124A (en) * | 2021-04-22 | 2022-10-21 | 广州汽车集团股份有限公司 | Buckle performance testing device and method and automotive interior system |
| CN115219125A (en) * | 2021-09-10 | 2022-10-21 | 广州汽车集团股份有限公司 | Dynamic stiffness testing method and system for rubber elastic part |
| CN117288411A (en) * | 2023-11-23 | 2023-12-26 | 沈阳欧施盾新材料科技有限公司 | Transmission shaft deflection detection method and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203772527U (en) * | 2013-11-28 | 2014-08-13 | 同济大学 | Engine rubber mount dynamic stiffness testing device |
| CN204241198U (en) * | 2014-10-23 | 2015-04-01 | 北京汽车研究总院有限公司 | A kind of frock for suspending sound stiffness test |
| CN106033027A (en) * | 2015-03-09 | 2016-10-19 | 陕西重型汽车有限公司 | Rigid modal testing device and rigid modal testing method of heavy type automotive power assembly suspension system |
-
2017
- 2017-03-09 CN CN201710138408.9A patent/CN106908205A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203772527U (en) * | 2013-11-28 | 2014-08-13 | 同济大学 | Engine rubber mount dynamic stiffness testing device |
| CN204241198U (en) * | 2014-10-23 | 2015-04-01 | 北京汽车研究总院有限公司 | A kind of frock for suspending sound stiffness test |
| CN106033027A (en) * | 2015-03-09 | 2016-10-19 | 陕西重型汽车有限公司 | Rigid modal testing device and rigid modal testing method of heavy type automotive power assembly suspension system |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109141719A (en) * | 2018-09-10 | 2019-01-04 | 宁波拓普集团股份有限公司 | A kind of device and its measurement method that measurement automobile power assembly suspension system is preloading |
| CN109141719B (en) * | 2018-09-10 | 2020-08-04 | 宁波拓普集团股份有限公司 | Device and method for measuring preload of automobile power assembly suspension system |
| CN115219124A (en) * | 2021-04-22 | 2022-10-21 | 广州汽车集团股份有限公司 | Buckle performance testing device and method and automotive interior system |
| CN115219124B (en) * | 2021-04-22 | 2024-06-14 | 广州汽车集团股份有限公司 | Buckle performance testing device and method and automobile interior system |
| CN113639942A (en) * | 2021-07-12 | 2021-11-12 | 江铃汽车股份有限公司 | Dynamic stiffness evaluation and test method for vehicle body attachment point |
| CN113639942B (en) * | 2021-07-12 | 2024-05-10 | 江铃汽车股份有限公司 | Dynamic stiffness evaluation and test method for vehicle body attachment point |
| CN115219125A (en) * | 2021-09-10 | 2022-10-21 | 广州汽车集团股份有限公司 | Dynamic stiffness testing method and system for rubber elastic part |
| CN114136667A (en) * | 2021-11-16 | 2022-03-04 | 东风汽车集团股份有限公司 | Device and method for testing dynamic stiffness of vehicle body suspension in Y direction |
| CN117288411A (en) * | 2023-11-23 | 2023-12-26 | 沈阳欧施盾新材料科技有限公司 | Transmission shaft deflection detection method and equipment |
| CN117288411B (en) * | 2023-11-23 | 2024-02-09 | 沈阳欧施盾新材料科技有限公司 | Transmission shaft deflection detection method and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106908205A (en) | A kind of test device of engine mounting dynamic stiffness | |
| CN101907523B (en) | Rigid body mode testing method for powertrain suspension system under loading condition | |
| CN203772527U (en) | Engine rubber mount dynamic stiffness testing device | |
| CN106033027A (en) | Rigid modal testing device and rigid modal testing method of heavy type automotive power assembly suspension system | |
| CN105416609A (en) | Multi-field coupling testing system and method | |
| CN104198197A (en) | Method and device for testing dynamic stiffness of car-body mounting points | |
| CN105092194A (en) | Inverse substructure technology-based transmission path analysis method | |
| CN110210179B (en) | Method for acquiring dynamic stiffness of elastic element and loads at two ends of elastic element | |
| EP1976760B1 (en) | System for and method of monitoring free play of aircraft control surfaces | |
| CN112697448A (en) | Method for identifying driving side exciting force of power assembly suspension under vehicle idling working condition | |
| CN106248332B (en) | Test the test-bed and method of clamped Vibration of Rectangular Plates and acoustic radiation | |
| CN102680214B (en) | Vibration isolation performance test device and method for corrugated pipe | |
| CN115270296A (en) | Method and system for analyzing fatigue durability of commercial vehicle cab | |
| Almeida et al. | Further developments on the estimation of rigid body properties from experimental data | |
| CN202547906U (en) | Vibration isolation performance testing device for corrugated pipe | |
| CN104280229B (en) | The unblock test method of vibrating isolation system | |
| CN112014125A (en) | Power assembly suspension virtual load endurance test device and test method | |
| KR101204165B1 (en) | Material long life that use electronic vibration tester high speed fatigue test chamber and system | |
| Jin et al. | Research on vibration reduction test and frame modal analysis of rice transplanter based on vibration evaluation | |
| CN204677678U (en) | A kind of viscous damper with connection set | |
| CN107588918A (en) | A kind of test crossbeam fastens the experimental provision for connecing joint portion dynamic characteristic | |
| CN109827785A (en) | CDC damper Performance Test System | |
| CN208076122U (en) | A kind of device for body structure road spectrum vibration experiment | |
| CN111209643B (en) | Method and system for determining rotational inertia of rail transit converter | |
| CN109839282A (en) | Electro-hydraulic servo formula damper test platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170630 |