CN100482509C - Non-linear rigidity vibration isolator for natural frequency of floating floorboard in high-speed vehicle - Google Patents
Non-linear rigidity vibration isolator for natural frequency of floating floorboard in high-speed vehicle Download PDFInfo
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- CN100482509C CN100482509C CNB2007100442261A CN200710044226A CN100482509C CN 100482509 C CN100482509 C CN 100482509C CN B2007100442261 A CNB2007100442261 A CN B2007100442261A CN 200710044226 A CN200710044226 A CN 200710044226A CN 100482509 C CN100482509 C CN 100482509C
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- floor
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- vibration isolator
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- 238000007667 floating Methods 0.000 title claims abstract description 16
- 238000002955 isolation Methods 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000003292 glue Substances 0.000 abstract 1
- 239000006096 absorbing agent Substances 0.000 description 5
- 230000035939 shock Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005339 levitation Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 238000013332 literature search Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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Abstract
The invention relates to a nonlinear rigidity vibration isolator of natural frequency for high speed vehicle floating floor board. It is made from vibration reduction glue and frame board. It has the nonlinear hardening rigidity feature and low system natural frequency and low influence of load to natural frequency. It has good vibration reduction effect and keeps low noise in the vehicle.
Description
Technical field
What the present invention relates to is the vibration isolator in a kind of noise and vibration control technology field, the particularly a kind of hot-short hot-short on floor non-linear rigidity vibration isolator that waits natural frequency on floor of floating of floating.
Background technology
Can the control problem of internal car noise more and more be subject to people's attention, and especially the internal car noise of High-speed Wheel vehicle and high-speed magnetic levitation vehicle is the important indicator of riding traveling comfort, even be related to hot-short and normally operate.For the High-speed Wheel vehicle, wheel track vibration and noise pass to floor compartment by suspension, excite floor compartment to vibrate, thus in car radiated noise, the noise that transmits in the car into by the floor is the main part of internal car noise.For the high-speed magnetic levitation vehicle, though there is not the vibrational excitation of wheel track, but because the following body construction in floor is more than both sides and roof complexity, gap apart from track girder is again little, when running at high speed, the car back noise of high-speed magnetic levitation vehicle is far above the noise of both sides and roof, so the car back noise noise that enters the compartment by the floor transmission also is the main part in the car.In order to reduce internal car noise, vibration and radiation sound especially in order to reduce the floor, researcher and engineer have proposed technology such as damping floor, composite floor board, the damping by increasing flooring material respectively, improve measure such as ground panel stiffness and reduce floor vibration.In recent years, have again researcher and engineer proposed to float ground plate technique, promptly on original floor compartment, one deck floor is installed again, forms double floor, the noise insulation factor of double floor is usually above the individual layer floor, can reduce the vibration radiation sound of floor in the compartment, thereby reach the purpose that reduces internal car noise, existing both at home and abroad many moneys high speed train has adopted the double floor design, has obtained certain noise reduction.Because the last floor weight that will carry passenger, luggage and seat, must and lower floor between support and connection are arranged, and the connection mode between the floor is one of greatest factor that influences the double floor noise reduction up and down.If coupling stiffness is excessive, just can not play good vibration isolation effect, the vibration of lower floor still can pass to upper floor, excite the upper floor vibration and radiated noise in the compartment, but behind the fully loaded passenger,, can cause the unequal other problems in floor if the sedimentation on floor is excessive.Therefore, the vibration isolator of supporting upper floor is the gordian technique of double floor, and the low frequency vibration isolation device of natural frequencys such as exploitation is necessary.
Connect with rubber damper between the at present common double floor, promptly rubber damper is installed, again upper floor is installed on the rubber damper at the upper surface of lower floor.The vibration isolating pad design of this mode is usually according to sound insulation, vibration isolation requirement, and load quality on the setting floor and vibration isolator constitute the best natural frequency scope of vibrating system, determine vibration isolator rigidity according to the total mass of floor, seat, passenger and luggage again.Because the weight of passenger and luggage and to distribute all be ccasual, can be from the zero load to the overload, and also they are main group of load quality.Usually set vibration isolator rigidity according to the expectation natural frequency of full-loading condition at present, in zero load or in semi-load, because total mass is much smaller than fully loaded, natural frequency is just much higher, the vibration isolating effect of unloaded vehicle double floor is just not as fully loaded, be empty wagons or passenger seldom the time, the noise in the compartment can be bigger.Therefore, in order to design the good vehicle double floor of defening effect, change with load with regard to the rigidity that requires vibration isolator, can guarantee within the best natural frequency scope that the natural frequency of system under the different loads is all being set, i.e. the vibrating isolation system of so-called " equifrequency ".
Find through literature search prior art,＜＜noise and vibration control〉in the 6th phase delivered 2003 years the paper " design of passenger vehicle floating floor and seat are to the influence of ride quality ", the author has introduced the design of bullet train floating floor, vibration isolator wherein adopts shearing-type shock absorber and two kinds of forms of compression-type shock absorber, two kinds of bumpers are installed in parallel, and wherein the compression-type shock absorber is installed in the position of the fulcrum of seat.The natural frequency of the system that the total mass of vibration isolator and floor, seat, passenger and luggage constitutes is set at 20Hz, and designs vibration isolator rigidity according to the total weight of full operating mode.Therefore, this type vibration isolation float the floor under the less situation of zero load or passenger, natural frequency will be far above design value 20Hz, the vibration isolating effect just design conditions not as full is good, floor vibration just increases, radiated noise also can be bigger in car for floor vibration.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art and defective, the hot-short that provides hot-short to float the floor non-linear rigidity vibration isolator that waits natural frequency on floor of floating, during application, can make hot-short float the upper floor on floor at vehicle unloaded and fully loaded the time, the natural frequency of system is all in optimum range, therefore, internal car noise and vibration can not change because of unloaded and fully loaded difference.
The present invention is achieved by the following technical solutions, the present invention includes vibration isolation rubber, skeleton base plate, and both vulcanize the fixed one that is.Described vibration isolation rubber, or its upper surface is provided with the assembling notch, and the assembling notch can cooperate with the upper floor support beam, makes the upper floor support beam can snap in vibration isolator of the present invention, and facility is installed.Described vibration isolation rubber, or its upper surface is by vulcanizing the bonding metal sheet that is provided with.Metal sheet is connected with floor-supporting by bonding or mechanical type of attachment.
Described vibration isolation rubber, its central authorities are provided with two holes, by position, the shape and size in design hole, can further regulate the relation curve of vibration isolator load of the present invention and rigidity, to satisfy different stiffness characteristics requirements.Kong Yueda, the rigidity of vibration isolator is overall just more little; The centre distance in hole is more little, and the rigidity of vibration isolator is just big more with the rate of change that load increases.Kong Yue is near circular, and the stress of vibration isolator elastomeric material is just even more.
The base of described vibration isolation rubber is curved.Under the underloading condition, vibration isolation rubber has only the central area between the diplopore to be out of shape by compression, and the form of distortion of vibration isolation rubber main region is shear deformation, and rigidity is very little, and the natural frequency of system is low; Along with load increases, the vibration isolation rubber deformation in compression, the area of contact of its arcuate bottom and skeleton base plate also increases thereupon, and the part of vibration isolation rubber compressive deformation increases gradually, and rigidity also increases thereupon.Shock absorber of the present invention has the gradually hard stiffness characteristics that rigidity increases with load, and load change is less to the influence of system frequency.Therefore, the vibrating isolation system that vibration isolator of the present invention and upper floor constitute can have close natural frequency when fully loaded and unloaded, also promptly have identical effectiveness in vibration suppression, and when can guarantee that the occupant is less, interior car noise is also lower.
Be provided with vertical skeleton in the described skeleton base plate.Described vertical skeleton not only can increase rubber and metal piece bond area, improves bind strength and reliability, also has position-limiting action, can limit vibration isolator of the present invention and produce distortion and damage under excessive improper loading.Be subjected to excessive improper load at vibration isolator of the present invention, under part overload, uneven loading action, can limitedly protect, both can prevent that vibration isolator of the present invention from damaging because of overload, more can be because of the excessive damage that causes other to involve parts of floor sinking displacement.
Described vertical skeleton, its top are cylinders, and the bottom is an inverted T section bar, and the two is an one.End shape is a cylinder, can reduce the stress concentration on this zone rubber and the metal bonding plane, improves the life-span of vibration isolator.
Described skeleton base plate, its material are special-purpose aluminium section bar.
Show after tested, vibration isolator of the present invention is subjected to load 150N (being equivalent to the vehicle zero load), 300N (be equivalent to vehicle semi-load), 480N (it is fully loaded to be equivalent to vehicle), 550N respectively when (being equivalent to overload of vehicle 20%), rigidity is respectively 170N/mm, 220N/mm, 270N/mm, 300N/mm, and intrinsic effect frequency is respectively: 16.8Hz, 13.4Hz, 11.8Hz, 11.6Hz; Maximum displacement was less than 2mm when vibration isolator of the present invention was fully loaded.System frequency is very little with the variation of load, and all within the low frequency ranges of the best, can so that hot-short float the floor underloading and full in all have good vibration isolating effect, satisfy the noise reduction requirement of hot-short.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a cross section structure scheme drawing of the present invention
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment has provided detailed embodiment being to implement under the prerequisite with the technical solution of the present invention, but protection scope of the present invention is not limited to following embodiment.
As depicted in figs. 1 and 2, present embodiment is that one forms by vibration isolation rubber 1 with 2 sulfurations of skeleton base plate, and wherein, the assembling notch 3 of vibration isolation rubber 2 is used for cooperating with the upper floor support beam, make the support beam 5 of upper floor 4 can snap in vibration isolator of the present invention, it is convenient to install.Skeleton base plate 2 is special-purpose aluminium section bar, and its top is a cylinder, and the bottom is an inverted T section bar, and the two is an one, the common shaping.The lower shoe of skeleton base plate 2 can adopt the form of lining cement or mechanical connection to be connected with basis 7.
Described vibration isolation rubber 1, or its upper surface is by vulcanizing the bonding metal sheet 6 that is provided with.Metal sheet 6 is connected with basis 7 with the support beam 5 of upper floor 4 respectively by bonding or mechanical type of attachment.Vibration isolation rubber 1, its central authorities are provided with two holes, by position, the shape and size in design hole, can further regulate the relation curve of vibration isolator load of the present invention and rigidity, to satisfy different stiffness characteristics requirements.The base of vibration isolation rubber 1 is curved.Under the underloading condition, vibration isolation rubber has only the central area between the diplopore to be out of shape by compression, and the form of distortion of vibration isolation rubber main region is shear deformation, and rigidity is very little, and the natural frequency of system is low; Along with load increases, the vibration isolation rubber deformation in compression, the area of contact of its arcuate bottom and skeleton base plate also increases thereupon, and the part of vibration isolation rubber compressive deformation increases gradually, and rigidity also increases thereupon.The shock absorber of present embodiment has the gradually hard stiffness characteristics that rigidity increases with load, and load change is less to the influence of system frequency.Therefore, the vibrating isolation system that the vibration isolator of present embodiment and upper floor constitute can have close natural frequency when fully loaded and unloaded, also promptly have identical effectiveness in vibration suppression, and when can guarantee that the occupant is less, interior car noise is also lower.
Be provided with vertical skeleton in the described skeleton base plate 2.Vertical skeleton not only can increase rubber and metal piece bond area, improves bind strength and reliability, also has position-limiting action, can limit vibration isolator of the present invention and produce distortion and damage under excessive improper loading.Be subjected to excessive improper load at the embodiment vibration isolator, under part overload, uneven loading action, can limitedly protect, both can prevent that vibration isolator of the present invention from damaging because of overload, more can be because of the excessive damage that causes other to involve parts of floor sinking displacement.
Claims (7)
1. the hot-short non-linear rigidity vibration isolator that waits natural frequency on floor of floating, it is characterized in that, comprise vibration isolation rubber (1), skeleton base plate (2), both vulcanize the fixed one that is, described vibration isolation rubber (1) or its upper surface are provided with assembling notch (3), and the assembling notch cooperates with the support beam (5) of upper floor (4); Or its upper surface is by vulcanizing the bonding metal sheet (6) that is provided with, and metal sheet is connected with the support beam (5) on floor by bonding or mechanical connection form.
2. the hot-short as claimed in claim 1 non-linear rigidity vibration isolator that waits natural frequency on floor of floating is characterized in that, described vibration isolation rubber (1), and its central authorities are provided with two holes.
3. the hot-short as claimed in claim 2 non-linear rigidity vibration isolator that waits natural frequency on floor of floating is characterized in that described hole be a circle.
4. the hot-short as claimed in claim 1 hot-short on the floor non-linear rigidity vibration isolator that waits natural frequency on floor of floating of floating is characterized in that the base of described vibration isolation rubber (1) is curved.
5. the hot-short as claimed in claim 1 non-linear rigidity vibration isolator that waits natural frequency on floor of floating is characterized in that, is provided with vertical skeleton in the described skeleton base plate (2).
6. the hot-short as claimed in claim 5 non-linear rigidity vibration isolator that waits natural frequency on floor of floating is characterized in that, described vertical skeleton, and its top is a cylinder, and the bottom is an inverted T section bar, and the two is an one.
7. the hot-short as claimed in claim 1 non-linear rigidity vibration isolator that waits natural frequency on floor of floating is characterized in that described skeleton base plate (2), its material are aluminium section bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100442261A CN100482509C (en) | 2007-07-26 | 2007-07-26 | Non-linear rigidity vibration isolator for natural frequency of floating floorboard in high-speed vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100442261A CN100482509C (en) | 2007-07-26 | 2007-07-26 | Non-linear rigidity vibration isolator for natural frequency of floating floorboard in high-speed vehicle |
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| CN101092142A CN101092142A (en) | 2007-12-26 |
| CN100482509C true CN100482509C (en) | 2009-04-29 |
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| CNB2007100442261A Expired - Fee Related CN100482509C (en) | 2007-07-26 | 2007-07-26 | Non-linear rigidity vibration isolator for natural frequency of floating floorboard in high-speed vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699098B (en) * | 2009-10-30 | 2011-09-21 | 奇瑞汽车股份有限公司 | Steering system dynamic vibration absorber and design method thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020245A1 (en) * | 2009-08-21 | 2011-02-24 | 上海磁浮交通发展有限公司 | Floating floor structure of rail vehicle |
| CN104608783B (en) * | 2014-12-03 | 2018-08-28 | 青岛澳泰交通设备有限公司 | Rubber shock absorber |
| CN105183025A (en) * | 2015-07-16 | 2015-12-23 | 南京航空航天大学 | Quasi-zero stiffness vibration isolation system and nonlinear feedback control method thereof |
| CN105046008B (en) * | 2015-07-30 | 2018-01-19 | 南京航空航天大学 | Piecewise nonlinear vibration isolator and its design method |
| GB2551582B (en) * | 2016-06-24 | 2019-11-13 | Bombardier Transp Gmbh | Vehicle body of a public transportation vehicle provided with floating floor panels |
| CN113864394A (en) * | 2021-09-02 | 2021-12-31 | 中车唐山机车车辆有限公司 | Floor damper, railway vehicle and panel preparation method of floor damper |
| CN114407945B (en) * | 2022-02-07 | 2022-09-16 | 中电建十一局工程有限公司 | Dynamic vibration and noise reduction structure and method for carriage of light rail vehicle |
-
2007
- 2007-07-26 CN CNB2007100442261A patent/CN100482509C/en not_active Expired - Fee Related
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101699098B (en) * | 2009-10-30 | 2011-09-21 | 奇瑞汽车股份有限公司 | Steering system dynamic vibration absorber and design method thereof |
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| CN101092142A (en) | 2007-12-26 |
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