CN104913890A - Demonstrating device and method for body structural vibration of automobile - Google Patents
Demonstrating device and method for body structural vibration of automobile Download PDFInfo
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- CN104913890A CN104913890A CN201510370676.4A CN201510370676A CN104913890A CN 104913890 A CN104913890 A CN 104913890A CN 201510370676 A CN201510370676 A CN 201510370676A CN 104913890 A CN104913890 A CN 104913890A
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Abstract
The invention discloses a demonstrating device and method for body structural vibration of an automobile. The demonstrating device includes a body in white, a support frame, a suspension, an exciter and a dynamic bump leveler. The body in white is supported by the support frame. The rear end of the suspension is connected to a front longitudinal beam of the body in white fixedly. The exciter is connected with the front end of the suspension fixedly and is disposed below the suspension. The dynamic bump leveler is connected with the front end of the suspension fixedly and is disposed above the suspension. The demonstrating method includes a step of assembling the demonstrating device, a step of demonstrating a vehicle body structural vibration process and a step of eliminating vehicle body structural vibration. The device and method can meet requirements of researchers for subjective experience of vehicle body structural vibration and provides direct sensation for vehicle body structural vibration research.
Description
Technical field
The present invention relates to the test of a kind of vibration demonstration, be specifically related to a kind of apparatus for demonstrating and demenstration method of automotive body structure oscillation phenomenon.
Background technology
Automobile vibration performance weighs an important indicator of automobile quality, is also the performance of the most direct feeling of client, as the floor that pin is trampled, and the bearing circle etc. that hand touches.Automobile carries various dynamic loading, and as Engine Excitation, road excitation etc., when the vibration passing of these driving sources is to each position of vehicle body, these vibrations can bring very large fatigue harm to body structure, bring a lot of uncomfortable property to taking people simultaneously.Also do not have at present to allow people undergo the apparatus for demonstrating of body structure oscillation phenomenon, thus cause everybody not comprehensive to the subjectivity and objectivity understanding of body structure oscillation phenomenon.
CN104596718A discloses a kind of demonstration mode of automobile metal plate work sound radiation, it can solve the subjective experience requirement of researcher to Metal Sheets for Body-manufacturing sound radiation phenomenon, there is provided visual sense for better studying sheet metal component sound radiation, but it can not meet the subjective experience requirement of researcher to body structure oscillation phenomenon.
Summary of the invention
The object of this invention is to provide a kind of apparatus for demonstrating and demonstration mode of automotive body structure oscillation phenomenon, to meet the subjective experience requirement of researcher to body structure oscillation phenomenon, for the vibration of research body structure provides visual sense.
The apparatus for demonstrating of automotive body structure oscillation phenomenon of the present invention, comprise body in white, also comprise bracing frame, suspension, vibrator and dynamic vibration absorber, described body in white is supported on bracing frame, the rear end of suspension is fixedly connected on the front longitudinal of body in white, and vibrator is fixedly connected with the front end of suspension, and is positioned at the below of suspension, dynamic vibration absorber can be fixedly connected with the front end of suspension, and is positioned at the top of suspension.The Main Function of suspension is vibrational excitation signal magnitude and the vibration frequency of the generation of decay vibrator, makes the signal being delivered to the front longitudinal of body in white by suspension more weak.
In order to remind the demonstration of body structure oscillation phenomenon to start more easily, described vibrator is that music drives excitation signal generator.Music drives excitation signal generator to be that one can send musical sound, and while sending musical sound, drive inner structure to produce the device of vibrational excitation signal.
The demenstration method of automotive body structure oscillation phenomenon of the present invention is, adopts body in white, bracing frame, suspension, vibrator and dynamic vibration absorber, carries out according to the following steps:
Step one, assembling apparatus for demonstrating: body in white is supported on bracing frame, the rear end of suspension is fixedly connected on the front longitudinal of body in white, vibrator is fixedly connected with the front end of suspension, and make vibrator be positioned at the below of suspension;
Step 2, demonstration trolley body structure vibration processes: the switch opening vibrator, vibrator produces vibration, acts on body in white, and slightly, the rear side wall vibration of body in white is strong for the front longitudinal of body in white and the front portion vibration of body in white;
Step 3, the vibration of elimination body structure: the switch first turning off vibrator; Then dynamic vibration absorber is fixedly connected with the front end of suspension, and makes dynamic vibration absorber be positioned at the top of suspension; Finally open the switch of vibrator, vibrator produces vibration, acts on body in white, and the rear side wall vibration of the front longitudinal of body in white, the front portion of body in white and body in white is slight.
The Demonstrator Trials of above-mentioned body structure oscillation phenomenon, can be described from the physical characteristics of body structure oscillation and wave: after the decay of the vibration that vibrator produces by suspension, be delivered to the front longitudinal of body in white and the front portion of body in white, vibration is herein very slight, researcher is imperceptible vibration almost, but after the transmission of body structure, the vibration at the rear side wall place of body in white is strong, creating researcher can the vibrating effect that arrives of subjective sensation.And produce this can the subjective sensation vibration of arriving, mainly due to vibrator produce vibration by suspension decay after, the physical characteristics being input to body structure there occurs change, the physical characteristics that inherent characteristic and the vibrational excitation signal of body in white first half body structure are input to vehicle body is not mated, therefore vibrate very (slightly) faint, researcher is imperceptible vibration almost; But when vibration is delivered to the rear side wall place of body in white gradually, because the inherent characteristic of the rear side wall structure of body in white is mated with the physical characteristics that vibrational excitation signal is input to vehicle body, therefore the rear side wall of body in white gradually by the energy accumulating of exciting at this, and along with the increase gradually of energy, creating researcher can the vibrating effect that arrives of subjective sensation.When dynamic vibration absorber be installed to suspension upper time, trickle energy is here all blocked, and causes whole body structure almost just not have the input of energy, and body vibrations is slight, the vibration of researcher's almost imperceptible vehicle body.
The Demonstrator Trials of automotive body structure oscillation phenomenon shows, trickle energy is in the process of vibration passing, as long as when the inherent characteristic of body structure is consistent with the inherent characteristic of excitation system, this energy slowly will be assembled at this structure place, thus the amplification gradually reached body structure vibration, even arrive the degree of destruction, for the vibration performance studying body structure provides visual sense.
The present invention compared with prior art has following effect:
(1) adopting above-mentioned apparatus for demonstrating and demenstration method to demonstrate the oscillation phenomenon of body structure to simple, intuitive, enable researcher to body structure oscillation phenomenon subjective experience, providing visual sense for better studying body structure vibration.
(2) vibrator be fixedly connected on suspension front end and be positioned at suspension below, by the attenuation of suspension, the physical characteristics making the inherent characteristic of body in white first half body structure and vibrational excitation signal be input to vehicle body is not mated, and it is faint that the front longitudinal of body in white, the front portion of body in white vibrate very (slightly); And mate with the physical characteristics that vibrational excitation signal is input to vehicle body due to the rear side wall structure inherent characteristic of body in white, the rear side wall vibration of body in white is strong; Thus provide required condition for realizing body structure oscillation phenomenon Demonstrator Trials.
(3) dynamic vibration absorber be fixedly connected on suspension front end and be positioned at suspension top, can simply, directly vibration starting point will vibration energy barrier, blocking the vibrational energy input of body structure, providing required condition for eliminating body structure vibration in body structure oscillation phenomenon Demonstrator Trials.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the apparatus for demonstrating of automotive body structure oscillation phenomenon in the present invention.
In figure: 1-body in white, 2-bracing frame, 3-suspension, 4-vibrator, 5-dynamic vibration absorber, 11-front longitudinal, 12-rear side wall.
Embodiment
Below in conjunction with accompanying drawing, the present invention is elaborated.
The apparatus for demonstrating of automotive body structure oscillation phenomenon as shown in Figure 1 comprises body in white 1, bracing frame 2, suspension 3, vibrator 4 and dynamic vibration absorber 5, and vibrator 4 is music driving excitation signal generator.Body in white 1 is supported on bracing frame 2, the rear end of suspension 3 is fixedly connected on the front longitudinal 11 of body in white, and vibrator 4 is fixedly connected with the front end of suspension 3, and is positioned at the below of suspension 3, dynamic vibration absorber 5 can be fixedly connected with the front end of suspension 3, and is positioned at the top of suspension 3.
The demenstration method adopting above-mentioned apparatus for demonstrating to carry out automotive body structure oscillation phenomenon is, adopts body in white 1, bracing frame 2, suspension 3, vibrator 4 and dynamic vibration absorber 5, carries out according to the following steps:
Step one, assembling apparatus for demonstrating: body in white 1 is supported on bracing frame 2, and require that vehicle body is firm, excitation vehicle body time vehicle body do not rock and can not personal safety be affected; The rear end of suspension 3 is bolted on the front longitudinal 11 of body in white 1 by three, vibrator 4 is connected by the hole of a bolt with suspension 3 front ends, and makes vibrator 4 be positioned at the below of suspension 3.
Step 2, demonstration trolley body structure vibration processes: the switch opening vibrator 4, vibrator 4 sends musical sound, and produce vibration simultaneously, act on body in white 1, the front longitudinal 11 of body in white 1 and the front portion vibration of body in white 1 are slightly, the rear side wall 12 of body in white 1 vibrates strongly, by touching the front longitudinal 11 of body in white 1 and the front portion of body in white 1, researcher is imperceptible vibration almost, when hand moves gradually after vehicle body, vibration, by perception gradually, when touching the rear side wall 12 of body in white 1, can find that the vibration of this position is strong.
Step 3, the vibration of elimination body structure: the switch first turning off vibrator 4, musical sound stops; Then dynamic vibration absorber 5 is connected by the hole of two bolts with suspension 3 front ends, and make dynamic vibration absorber 5 be positioned at the top of suspension 3, the making of dynamic vibration absorber 5 is according to the dynamic vibration absorber classical formulas on textbook, selects suitable quality and suitable rubber to make and obtains; Finally open the switch of vibrator 4, vibrator 4 sends musical sound, and produce vibration simultaneously, act on body in white 1, the rear side wall 12 of the front longitudinal 11 of body in white 1, the front portion of body in white 1 and body in white 1 vibrates slightly, by touching the rear side wall 12 of the front longitudinal 11 of body in white 1, the front portion of body in white 1 and body in white 1, the vibration of researcher's almost imperceptible vehicle body.
The Demonstrator Trials of above-mentioned body structure oscillation phenomenon, can be described from the physical characteristics of body structure oscillation and wave: the vibration that vibrator 4 produces is by after the decay that suspends 3, be delivered to the front longitudinal 11 of body in white 1 and the front portion of body in white 1, vibration is herein very slight, researcher is imperceptible vibration almost, but after the transmission of body structure, the vibration at rear side wall 12 place of body in white 1 is strong, creating researcher can the vibrating effect that arrives of subjective sensation.And produce this can the subjective sensation vibration of arriving, the vibration mainly produced due to vibrator 4 is by after the decay that suspends 2, the physical characteristics being input to body structure there occurs change, the physical characteristics that inherent characteristic and the vibrational excitation signal of body in white first half body structure are input to vehicle body is not mated, therefore vibrate very (slightly) faint, researcher is imperceptible vibration almost; But when vibration is delivered to rear side wall 12 place of body in white 1 gradually, because the inherent characteristic of the rear side wall structure of body in white 1 is mated with the physical characteristics that vibrational excitation signal is input to vehicle body, therefore the rear side wall 12 of body in white 1 gradually by the energy accumulating of exciting at this, and along with the increase gradually of energy, creating researcher can the vibrating effect that arrives of subjective sensation.When dynamic vibration absorber 5 is installed in suspension 3, trickle energy is here all blocked, and causes whole body structure almost just not have the input of energy, and body vibrations is slight, the vibration of researcher's almost imperceptible vehicle body.
Claims (3)
1. the apparatus for demonstrating of an automotive body structure oscillation phenomenon, comprise body in white (1), it is characterized in that, also comprise bracing frame (2), suspension (3), vibrator (4) and dynamic vibration absorber (5), described body in white (1) is supported on bracing frame (2), the rear end of suspension (3) is fixedly connected on the front longitudinal (11) of body in white, vibrator (4) is fixedly connected with the front end of suspension (3), and be positioned at the below of suspension (3), dynamic vibration absorber (5) can be fixedly connected with the front end of suspension (3), and is positioned at the top of suspension (3).
2. the apparatus for demonstrating of automotive body structure oscillation phenomenon according to claim 1, is characterized in that: described vibrator (4) is music driving excitation signal generator.
3. a demenstration method for automotive body structure oscillation phenomenon, is characterized in that, adopts body in white (1), bracing frame (2), suspension (3), vibrator (4) and dynamic vibration absorber (5), carries out according to the following steps:
Step one, assembling apparatus for demonstrating: body in white (1) is supported on bracing frame (2), the rear end suspending (3) is fixedly connected on the front longitudinal (11) of body in white, the front end of vibrator (4) with suspension (3) is fixedly connected with, and makes vibrator be positioned at the below of suspension (3);
Step 2, demonstration trolley body structure vibration processes: the switch opening vibrator (4), vibrator produces vibration, acts on body in white, and slightly, rear side wall (12) vibration of body in white is strong for the front longitudinal (11) of body in white and the front portion vibration of body in white;
Step 3, the vibration of elimination body structure: the switch first turning off vibrator (4); Then the front end of dynamic vibration absorber (5) with suspension (3) is fixedly connected with, and makes dynamic vibration absorber be positioned at the top of suspension (3); Finally open the switch of vibrator (4), vibrator produces vibration, acts on body in white, and rear side wall (12) vibration of the front longitudinal (11) of body in white, the front portion of body in white and body in white is slight.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106840697A (en) * | 2017-01-16 | 2017-06-13 | 同济大学 | The determination method that body side wall cavity blocking block influences on vehicle low-frequency structure vibration |
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| JPH07281676A (en) * | 1994-04-13 | 1995-10-27 | Hitachi Ltd | Active type vibration and noise controller |
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| JP2015102522A (en) * | 2013-11-28 | 2015-06-04 | 公益財団法人鉄道総合技術研究所 | Travel simulation device of overhead wire/pantograph system |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH07281676A (en) * | 1994-04-13 | 1995-10-27 | Hitachi Ltd | Active type vibration and noise controller |
| JPH0843270A (en) * | 1994-07-27 | 1996-02-16 | H N D:Kk | Method and apparatus for measuring attenuation force of shock absorber mounted on vehicle body |
| CN101408486A (en) * | 2008-11-18 | 2009-04-15 | 哈尔滨工业大学 | Power loading method |
| CN201408105Y (en) * | 2009-05-15 | 2010-02-17 | 北京工业大学 | Time-sharing fast steady-state sine sweep frequency shock excitation frequency response function measuring system |
| CN103575382A (en) * | 2013-11-28 | 2014-02-12 | 重庆长安汽车股份有限公司 | Method for testing local mode of automotive sheet part |
| JP2015102522A (en) * | 2013-11-28 | 2015-06-04 | 公益財団法人鉄道総合技術研究所 | Travel simulation device of overhead wire/pantograph system |
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| CN106840697A (en) * | 2017-01-16 | 2017-06-13 | 同济大学 | The determination method that body side wall cavity blocking block influences on vehicle low-frequency structure vibration |
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