CN104020005A - Vibration isolation simulation device for marine engine room auxiliary machines - Google Patents
Vibration isolation simulation device for marine engine room auxiliary machines Download PDFInfo
- Publication number
- CN104020005A CN104020005A CN201410271333.8A CN201410271333A CN104020005A CN 104020005 A CN104020005 A CN 104020005A CN 201410271333 A CN201410271333 A CN 201410271333A CN 104020005 A CN104020005 A CN 104020005A
- Authority
- CN
- China
- Prior art keywords
- engine room
- vibration isolation
- vibration
- air spring
- equipment
- 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.)
- Granted
Links
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a vibration isolation simulation device for marine engine room auxiliary machines. The vibration isolation simulation device for marine engine room auxiliary machines comprises an engine room bottom simulation structure, at least one vibration isolation system and a movable type elastic support, wherein the movable type elastic support comprises air springs and idler wheels; the vibration isolation systems are detachably installed on the engine room bottom simulation structure; the air springs are symmetrically arranged below the engine room bottom simulation structure. The vibration isolation simulation device for marine engine room auxiliary machines integrates a marine engine room ship body structure, typical power equipment and the vibration isolation systems of various types, the manufacturing and operating cost is low, the low-frequency air springs are adopted for vibration isolation, installation and movement are convenient, the vibration isolation simulation device can be used for simulating a vibration noise source of marine engine room auxiliary machines, carrying out a simulation experiment of vibration noise characteristics of various marine engine room auxiliary machines and experimental verification of vibration attenuation and noise reduction design comprehensive effects of marine engine room auxiliary machines, and the application prospects are wide.
Description
Technical field
The present invention relates to a kind of isolation mounting, specifically relate to a kind of watercraft engine room subsidiary engine equipment vibration isolation analogue means.
Background technology
Vibration noise is one of Specifeca tion speeification of boats and ships, and cabin power-equipment is the main source of Ship Vibration noise, and along with the fast development of shipbuilding technology, noise reduction technology is more and more subject to people and pays close attention to.
Kind and the One's name is legion of cabin medium power equipment, various power-equipments are arranged in engine room inside according to certain requirement, to realize the allomeric function in cabin.In cabin, various power-equipments are due to the difference of its principle of work, and vibration noise source characteristic there are differences, and the vibration isolation measure that it is taked is also different.Due to Arrangement of Engine-room compactness, the vibration noise that various power-equipments produce in the time of operation influences each other while being delivered to cabin, interacts, and has jointly formed the vibration noise in cabin.Therefore,, in research individual equipment vibration noise characteristic, be necessary the effect of vibration and noise reduction under studying various power-equipments installs in cabin.
Vibration isolation is most study in vibration control, a most widely used vibration control technology, common vibration isolation way comprises single-layer partiting polarization, double-layer vibration isolating and buoyant raft vibration isolation, for different plant equipment and use occasion, many plant equipment vibration and noise reducing devices are developed and apply.For the needs of experimental study, marine mechanical equipment vibration and noise reducing device is divided into device in kind and 2 kinds of situations of modeling device.Device in kind can reflect actual conditions better, but often has high input, and operating cost is high, modeling device simulating actual conditions to a certain extent, and drop into littlely, operating cost is low.
Taking ton boats and ships as example, because volume and the power of cabin power-equipment are very large, kind and One's name is legion, device in kind operating cost hourly is up to several thousand yuan, the cost of manufacture, installation and operation of engine room facilities being carried out to the checking of vibration noise performance test and vibration and noise reducing contrived experiment is very expensive, and experimental implementation person's the operating ability of putting into practice is had to very high requirement.Therefore, analogue means is more suitable for carrying out the experimental study of engine room facilities vibration noise performance and effect of vibration and noise reduction.
Summary of the invention
Goal of the invention: in order to overcome the device manufacture in kind of spot ship cabin power machine, costly technical matters and the defect of installation and operation, the invention provides a kind of vibration isolation analogue means of carrying out engine room facilities vibration noise performance and effect of vibration and noise reduction experimental study, can simulate the floating state of boats and ships in water, and little on the impact of surrounding ambient vibration, thereby can directly on normal concrete flooring, move, and without special ground.
Technical scheme: a kind of watercraft engine room subsidiary engine equipment vibration isolation analogue means, comprise bilge model configuration, at least one vibrating isolation system and Mobile elastic supporting, Mobile elastic supporting comprises air spring and roller, vibrating isolation system is removably mounted on bilge model configuration, and air spring is arranged symmetrically in bilge model configuration below.
Preferably, the height of described air spring under inflated condition is higher than roller.
Preferably, described air spring quantity is more than four.
Preferably, described air spring is low frequency air spring.
Preferably, the natural frequency of described low frequency air spring is 1～5Hz.
Preferably, described bilge model configuration adopts all steel material to be welded.Boats and ships bilge structure with simulation taking plate muscle structure as feature.
Further, described vibrating isolation system comprises power-equipment and isolation mounting, and power-equipment is removably mounted on isolation mounting.Jointly to simulate the vibration noise source of various subsidiary engine equipment in cabin and the effect that intercouples thereof.
Further, described power-equipment is small diesel engine, air compressor machine, motor or blower fan.
Further, the vibration isolation way of described isolation mounting is single-layer partiting polarization, double-layer vibration isolating, dynamic absorber or buoyant raft vibration isolation.
Further, described air compressor machine is connected with described air spring, is the air spring inflation of bottom support.Air compressor machine both produced vibration noise source as engine-room auxiliary machine equipment, was inflated by the air spring that can be bottom support, had saved equipment cost.
Beneficial effect: the present invention integrates watercraft engine room Ship Structure, typical power-equipment and various forms vibrating isolation system, containing the power-equipment combination of various vibration noises source feature, and various vibration isolation ways and absorbing combination, can be used for carrying out the experimental study of cabin motive power machine equipment, remarkable to effectiveness in vibration suppression, manufacture, operation, maintenance cost are low, install and conveniently moving.Adopt air spring vibration isolation, install and conveniently moving, can be used for simulating the vibration noise source of watercraft engine room subsidiary engine equipment, carry out the vibration noise simulated behavior experiment of the multiple subsidiary engine equipment in cabin and the experimental verification of vibration and noise reducing design synthesis effect thereof, have a extensive future.
The present invention is taking typical vessel engine-room auxiliary machines such as diesel engine common in watercraft cabinet equipment, air compressor machine, motor and blower fans as object, taking bilge model configuration as platform, set up integrate these typical power-equipments dwindle model generalization isolation mounting, can be used for carrying out the experimental study of engine room facilities vibration noise performance, and the experimental verification of vibrating isolation system and isolation products performance design, can be marine engine room power category Major the perceptual knowledge of watercraft cabinet equipment and various typical vibration isolation ways is provided, as the experimental study work of analogue experiment installation.
Selected power-equipment, the vibration damper of the present invention is the matured product on market, build, the expense of operation and maintenance is low, be suitable as experimental provision, overcome the shortcoming of boats and ships device manufactures in kind, installation and operation cost costliness, save installing space, reduced the weight of device.
The present invention adopts multiple power-equipment type and vibration isolation method, and vibration and noise source characteristic are abundant, are convenient to carry out vibration noise experimental study; The isolation effect of power-equipment vibrating isolation system reaches more than 85%, and isolation effect is good; The vibration damping that is delivered to ground can reach more than 90%, little to the vibration effect of surrounding environment, can directly on normal concrete flooring, move, and without special ground.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the vertical view of model configuration at the bottom of middle deck of the present invention;
Fig. 3 is the schematic diagram of double-layer vibration isolating system in the present invention;
Fig. 4 is the schematic diagram of buoyant raft vibrating isolation system in the present invention;
Fig. 5 is the schematic diagram of medium power shock absorption system of the present invention.
Embodiment
As shown in Figure 1, a kind of watercraft engine room subsidiary engine equipment vibration isolation analogue means comprises bilge model configuration 5, at least one vibrating isolation system and Mobile elastic supporting, Mobile elastic supporting comprises air spring V and roller VI, vibrating isolation system is removably mounted on bilge model configuration, and air spring V is arranged symmetrically in bilge model configuration 5 belows.Whole watercraft engine room subsidiary engine equipment vibration isolation analogue means is supported and is supported on ground by Mobile elastic, floating state with simulation boats and ships in water, and reduce little on the impact of surrounding ambient vibration, thereby can directly on normal concrete flooring, move, the bottom design of bilge model configuration has multiple roller supportings, can realize fast moving.
Vibrating isolation system comprises isolation mounting and power-equipment, multiple typical power-equipment utilizes different vibration isolation ways that isolation mounting is set as required, power-equipment can be selected common small sized diesel engine, air compressor machine, the combination of the typical vessel such as motor and blower fan engine-room auxiliary machine, isolation mounting can we selected typical single-layer partiting polarization, double-layer vibration isolating, the vibration isolation ways such as dynamic absorber and buoyant raft vibration isolation, power-equipment is dismountable to be arranged on isolation mounting, different dynamic equipment can be combined from different isolation mountings, for simulating the vibration noise source of watercraft engine room subsidiary engine equipment, carry out the vibration noise simulated behavior experiment of the multiple subsidiary engine equipment in cabin and the experimental verification of vibration and noise reducing design synthesis effect thereof.
The present embodiment comprises three vibrating isolation systems, be respectively double-layer vibration isolating system I, buoyant raft vibrating isolation system II, dynamic absorber system III, all vibrating isolation systems are all mounted by means of bolts on bilge model configuration 5, the bottom of bilge model configuration 5 is bolted to connection in air spring V and roller VI upper, then is supported on ground by air spring V or roller VI.Floating state with simulation boats and ships in water, and minimizing is little on the impact of surrounding ambient vibration, thus can directly on normal concrete flooring, move, the bottom design of bilge model configuration has multiple roller VI, can realize fast moving.Adopt four and low frequency air spring support above, that be arranged symmetrically with, the natural frequency of air spring is 1～5Hz, and the vibration damping that is delivered to ground can reach more than 90%, little to the vibration effect of surrounding environment, can directly on normal concrete flooring, move, and without special ground.
As shown in Figure 2, bilge model configuration 5 is welded on the ship hull top of certain thickness steel plate simulation by the solid floor of the stringers being equidistantly arranged in parallel successively, homeotropic alignment, to simulate the plate muscle structure of the hull bilge.Be preferably the ship hull top that is welded on the simulation of 6mm steel plate by two solid floors of the six roots of sensation stringers being equidistantly arranged in parallel successively, homeotropic alignment, to simulate hull Ceiling muscle structure and dynamic perfromance thereof, the long 1900mm of bilge model configuration 5, wide 1000mm.
As shown in Figure 3, double-layer vibration isolating system I comprises diesel engine 1, upper strata vibration isolator 2, intermediate mass piece 3, lower floor's vibration isolator 4 and bilge model configuration 5.Upper strata vibration isolator 2 adopts rubber shock absorber, and model is B-25, and quantity is four, is arranged symmetrically with, and is joined with bolts between diesel engine 1 and intermediate mass piece 3.Lower floor's vibration isolator 4 adopts rubber shock absorber, and model is B-40, and quantity is four, is arranged symmetrically with, and is joined with bolts between intermediate mass piece 3 and bilge model configuration 5.
As shown in Figure 4, buoyant raft vibrating isolation system II comprises motor 6, blower fan 7, motor below vibration isolator 8, blower fan below vibration isolator 9, raft structure below vibration isolator 10, raft structure 11 and bilge model configuration 5.Motor below vibration isolator 8 adopts rubber shock absorber, and model is B-15, and quantity is four, is arranged symmetrically with, and is joined with bolts between motor 6 and bilge model configuration 5.Blower fan below vibration isolator 9 adopts rubber shock absorber, and model is B-10, and quantity is four, is arranged symmetrically with, and is joined with bolts between blower fan 7 and bilge model configuration 5.Raft structure below vibration isolator 10 adopts rubber shock absorber, and model is B-25, and quantity is six, is arranged symmetrically with, and is joined with bolts between raft structure 11 and bilge model configuration 5.
Above-mentioned intermediate mass piece 3, raft structure 11 are welded by 6mm steel plate and reinforced structure, planar dimension is installed as suitable to be applicable to the power-equipment of its support, and improving as far as possible integrally-built rigidity, its quality is 0.5～1.2 times of institute's supporting motive force equipment quality.
As shown in Figure 5, dynamic absorber system III comprises air compressor machine 12, air compressor machine vibration isolator 13, absorber block vibration isolator 14, absorber block 15 and bilge model configuration 5.Air compressor machine vibration isolator 13 adopts rubber shock absorber, and model is B-160, and quantity is four, is arranged symmetrically with, and is joined with bolts between air compressor machine 12 and bilge model configuration 5.Absorber block vibration isolator 14 is rubber shock absorber, and model is B-25, and quantity is two, is joined with bolts between air compressor machine 12 and absorber block 15.Air compressor machine 12 both produced vibration noise source as engine-room auxiliary machine equipment, also can be the air spring inflation of bottom support, had saved equipment cost.When the operation of watercraft engine room subsidiary engine equipment vibration isolation analogue means, can utilize air compressor machine 12 to inflate air spring V, in the time of height design, should make the height of air spring V under inflated condition higher than roller VI, thereby support bilge model configuration 5 by air spring V after making to be inflated to design pressure; When watercraft engine room subsidiary engine equipment vibration isolation analogue means does not move, pressure-air in air spring V can be emitted, make the height of air spring V lower than roller VI, now support bilge model configuration 5 by roller VI, just can promote by hand boats and ships engine-room auxiliary machine equipment isolation mounting model without hoisting device, thereby realize fast moving, and extend the serviceable life of air spring V.
In addition, remove absorber block vibration isolator 14, absorber block 15 in dynamic absorber system III and become typical single-layer partiting polarization system, can be used as another kind of vibrating isolation system of the present invention.
For improving the vibration isolating effect of vibrating isolation system, the natural frequency of vibrating isolation system should be less than 0.5 times of the main forcing frequency of power-equipment; Determined after the rigidity of vibration isolator by parameters such as the quality of power-equipment and the natural frequencys of vibrating isolation system, then select vibration isolator model.All vibration isolator convenient disassemblies, can carry out the damping property contrast experiment of different model product easily.
The present invention, taking power-equipment common in watercraft cabinet equipment as object, taking the local plate muscle of bilge structure as platform, builds the watercraft engine room subsidiary engine equipment isolation mounting model that integrates various power-equipments, multiple vibrating isolation system and bilge partial structurtes; Can simulate common power-equipment vibration noise source, cabin feature, analyze respectively the effectiveness in vibration suppression of single-layer partiting polarization, double-layer vibration isolating, buoyant raft vibration isolation, dynamic absorber system, contrast the vibration transmissibility of different vibration isolation ways; Various power-equipments can isolated operation, carries out targetedly the vibration noise performance test of certain power-equipment, also can move many power-equipments simultaneously, analyzes the main vibration noise source characteristic in cabin and influences each other.
Claims (10)
1. a watercraft engine room subsidiary engine equipment vibration isolation analogue means, it is characterized in that, comprise bilge model configuration, at least one vibrating isolation system and Mobile elastic supporting, Mobile elastic supporting comprises air spring and roller, vibrating isolation system is removably mounted on bilge model configuration, and air spring is arranged symmetrically in bilge model configuration below.
2. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 1, is characterized in that, the height of described air spring under inflated condition is higher than roller.
3. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 1, is characterized in that, described air spring quantity is more than four.
4. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 1, is characterized in that, described air spring is low frequency air spring.
5. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 1, is characterized in that, the natural frequency of described low frequency air spring is 1～5Hz.
6. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 1, is characterized in that, described bilge model configuration adopts all steel material to be welded.
7. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 1, is characterized in that, described vibrating isolation system comprises power-equipment and isolation mounting, and power-equipment is removably mounted on isolation mounting.
8. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 7, is characterized in that, described power-equipment is small diesel engine, air compressor machine, motor or blower fan.
9. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 7, is characterized in that, the vibration isolation way of described isolation mounting is single-layer partiting polarization, double-layer vibration isolating, dynamic absorber or buoyant raft vibration isolation.
10. watercraft engine room subsidiary engine equipment vibration isolation analogue means according to claim 8, is characterized in that, described air compressor machine is connected with described air spring, is the air spring inflation of bottom support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271333.8A CN104020005B (en) | 2014-06-17 | 2014-06-17 | Watercraft engine room subsidiary engine equipment vibration isolation analog |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410271333.8A CN104020005B (en) | 2014-06-17 | 2014-06-17 | Watercraft engine room subsidiary engine equipment vibration isolation analog |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104020005A true CN104020005A (en) | 2014-09-03 |
| CN104020005B CN104020005B (en) | 2016-08-31 |
Family
ID=51436885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410271333.8A Active CN104020005B (en) | 2014-06-17 | 2014-06-17 | Watercraft engine room subsidiary engine equipment vibration isolation analog |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104020005B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244015A (en) * | 2015-10-22 | 2016-01-13 | 中国船舶重工集团公司第七二四研究所 | Accommodation device with sound absorbing function |
| CN108195580A (en) * | 2018-01-29 | 2018-06-22 | 西北工业大学 | A kind of buoyant raft vibration isolation gear train assembly vibration is transmitted and noise testing experimental rig |
| CN111532403A (en) * | 2020-05-15 | 2020-08-14 | 中国科学院声学研究所 | Formula cabin raft is embraced in sinking |
| CN113323986A (en) * | 2021-06-30 | 2021-08-31 | 中国人民解放军海军工程大学 | Marine double-pump module symmetric floating raft vibration isolation structure |
| CN113374823A (en) * | 2021-06-30 | 2021-09-10 | 中国人民解放军海军工程大学 | Marine multi-pump module symmetrical floating raft vibration isolation structure |
| CN113428291A (en) * | 2021-06-21 | 2021-09-24 | 中国舰船研究设计中心 | Integrated arrangement method for marine diesel engine power station |
| CN114658797A (en) * | 2022-02-24 | 2022-06-24 | 中船澄西船舶修造有限公司 | Lateral thrust vibration reduction structure and thrust vibration reduction method for marine auxiliary machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000356247A (en) * | 1999-06-16 | 2000-12-26 | Nisshinbo Ind Inc | Structure of having automobile part on board in vibration isolation state |
| CN1651892A (en) * | 2004-02-02 | 2005-08-10 | 沈光新 | Simulated test platform system for mechanical structure vibration resistant performance |
| CN200962274Y (en) * | 2006-10-20 | 2007-10-17 | 秦树人 | Virtual test vibration and control integrated experimental device |
| CN204008165U (en) * | 2014-06-17 | 2014-12-10 | 江苏省镇江船厂（集团）有限公司 | Watercraft engine room subsidiary engine equipment vibration isolation analogue means |
-
2014
- 2014-06-17 CN CN201410271333.8A patent/CN104020005B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000356247A (en) * | 1999-06-16 | 2000-12-26 | Nisshinbo Ind Inc | Structure of having automobile part on board in vibration isolation state |
| CN1651892A (en) * | 2004-02-02 | 2005-08-10 | 沈光新 | Simulated test platform system for mechanical structure vibration resistant performance |
| CN200962274Y (en) * | 2006-10-20 | 2007-10-17 | 秦树人 | Virtual test vibration and control integrated experimental device |
| CN204008165U (en) * | 2014-06-17 | 2014-12-10 | 江苏省镇江船厂（集团）有限公司 | Watercraft engine room subsidiary engine equipment vibration isolation analogue means |
Non-Patent Citations (1)
| Title |
|---|
| 左中杰: "弹性支承平台结构的振动控制研究", 《中国优秀硕士学位论文全文数据库》, no. 2, 15 June 2004 (2004-06-15), pages 42 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244015A (en) * | 2015-10-22 | 2016-01-13 | 中国船舶重工集团公司第七二四研究所 | Accommodation device with sound absorbing function |
| CN108195580A (en) * | 2018-01-29 | 2018-06-22 | 西北工业大学 | A kind of buoyant raft vibration isolation gear train assembly vibration is transmitted and noise testing experimental rig |
| CN111532403A (en) * | 2020-05-15 | 2020-08-14 | 中国科学院声学研究所 | Formula cabin raft is embraced in sinking |
| CN113428291A (en) * | 2021-06-21 | 2021-09-24 | 中国舰船研究设计中心 | Integrated arrangement method for marine diesel engine power station |
| CN113323986A (en) * | 2021-06-30 | 2021-08-31 | 中国人民解放军海军工程大学 | Marine double-pump module symmetric floating raft vibration isolation structure |
| CN113374823A (en) * | 2021-06-30 | 2021-09-10 | 中国人民解放军海军工程大学 | Marine multi-pump module symmetrical floating raft vibration isolation structure |
| CN113323986B (en) * | 2021-06-30 | 2022-03-04 | 中国人民解放军海军工程大学 | Marine double-pump module symmetric floating raft vibration isolation structure |
| CN113374823B (en) * | 2021-06-30 | 2022-03-04 | 中国人民解放军海军工程大学 | Marine multi-pump module symmetrical floating raft vibration isolation structure |
| CN114658797A (en) * | 2022-02-24 | 2022-06-24 | 中船澄西船舶修造有限公司 | Lateral thrust vibration reduction structure and thrust vibration reduction method for marine auxiliary machine |
| CN114658797B (en) * | 2022-02-24 | 2023-09-05 | 中船澄西船舶修造有限公司 | Lateral thrust vibration reduction structure and thrust vibration reduction method for ship auxiliary machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104020005B (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104020005A (en) | Vibration isolation simulation device for marine engine room auxiliary machines | |
| CN201153012Y (en) | Large loaded 6 freedom degree electricity driving platform | |
| CN204008165U (en) | Watercraft engine room subsidiary engine equipment vibration isolation analogue means | |
| CN108195599A (en) | A kind of automobile vibration experimental rig | |
| CN105404718B (en) | A kind of computational methods of Mid and minor spans continuous bridge hogging moment impact coefficient | |
| EP2995524B1 (en) | Carriage body for multiple unit train | |
| CN205175642U (en) | Bilayer and individual layer vibration isolation system vibration test bench with adjustable | |
| CN105235823B (en) | A kind of six-freedom parallel stable chair | |
| CN101877193A (en) | Earthquake simulator capable of carrying out earthquake drill | |
| CN103267084B (en) | Three-dimensional frame type buoyant raft vibration isolation device | |
| CN102644694A (en) | Vibration isolation system of elastic foundation buoyancy raft for marine machinery | |
| CN109625193A (en) | A kind of scientific surveying ship with buoyant raft vibration insulating system | |
| CN203910062U (en) | Helicopter cabin base plate dynamic simulation platform | |
| CN106500981A (en) | A kind of rubber laminated spring is comprehensive performance test bed and its test method | |
| CN204056247U (en) | A kind of inflatable target ship of remote-controlled movement | |
| CN203809590U (en) | Vibration attenuation mechanism | |
| CN209014258U (en) | Sound state multifunction test servo loading system | |
| CN201255958Y (en) | Movable simulated earthquake escape training house | |
| CN203463533U (en) | Spliced L-shaped double-layer vibration isolation device | |
| CN2833502Y (en) | Vibration damping apparatus for blasting of composite steel sheet | |
| CN201540204U (en) | Base of automobile precision gauge | |
| CN109764079A (en) | A kind of marine generator device systems vibration and noise reducing device | |
| CN201429494Y (en) | Elastic supporting device for modal test | |
| CN214277342U (en) | Cabin structure vibration and air noise forecast verification test device | |
| CN110539842B (en) | Non-linear elastic vibration reduction bed plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |