CN109458430A - Based on quality, tuning, mixes and cut down vibrating isolation system optimum design method to the floating of effect - Google Patents
Based on quality, tuning, mixes and cut down vibrating isolation system optimum design method to the floating of effect Download PDFInfo
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- CN109458430A CN109458430A CN201811423932.1A CN201811423932A CN109458430A CN 109458430 A CN109458430 A CN 109458430A CN 201811423932 A CN201811423932 A CN 201811423932A CN 109458430 A CN109458430 A CN 109458430A
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- raft frame
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/002—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion characterised by the control method or circuitry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
- B63B17/0081—Vibration isolation or damping elements or arrangements, e.g. elastic support of deck-houses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/04—Frequency effects
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The present invention relates to a kind of based on quality, tuning, mixes and cuts down vibrating isolation system optimum design method to the floating of effect, optimize including mass effect optimization, tuning effect optimization and mixed effect of supporting, mass effect is optimized on the intermediate raft frame that non-disturbance equipment is rigidly attached to buoyant raft shock-resistant system；Tuning effect is optimized for for non-powered equipment or idle stand-by power equipment being fixed on intermediate raft frame using elastic installation way, the dynamic vibration absorber as raft frame；The mixed power-equipment run while effect is optimized for two or more that supports is resiliently mounted on intermediate raft frame；Respectively for above three effect propose different equipment in groups, different installation form scheme, using installation pedestal vibration control effect as target, it is preferred to carry out scheme, forms global optimum application isolation scheme.The present invention, which rationally makes good use of buoyant raft quality, tuning and mixes, supports effect, realizes maximum vibration isolating effect with the smallest impost and space cost.
Description
Technical field
The invention belongs to the technical field of Noise and Vibration Control, in particular to it is a kind of based on quality, it is tuning, mixed to effect
It is floating to cut down vibrating isolation system optimum design method.
Background technique
Noise and Vibration Control is both that the emphasis of ships used for military purposes Stealth Fighter development and ship for civil use navigate by water the strong of comfort
Property requirement processed, has increasingly important role in modern day marine vessel designs.For the naval vessels of lowsteaming, by ship
The mechanical noise that main and auxiliary machine equipment and pipeline generate is its Main Noise Sources.Mechanical noise transmit and radiate to hull first
Sound channel is hull pedestal, and using vibration isolation way to the vibration that mechanical equipment generates is a kind of most effective means.Equipment vibration isolation master
There are single-layer partiting polarization, double-layer vibration isolating and buoyant raft vibration isolation.Buoyant raft vibration isolation is made an uproar to the control vibration of Sound stealth demanding ships used for military purposes
The effective means of sound.
Buoyant raft is the second level vibration isolation system that greater than two independent equipment (including disturbing and non-disturbance) concentrate with vibration isolation
System.Buoyant raft shock-resistant system is made of multiple by the equipment of vibration isolation, upper layer vibration isolator, intermediate raft frame and lower layer's vibration isolator etc., buoyant raft
Isolation mounting is typically mounted on hull pedestal.
Buoyant raft shock-resistant system is in single-layer partiting polarization system-based, based on the higher vibration isolating effect of pursuit, smaller Resources Consumption
And the result developed.In double-layer vibration isolating device, intermediate raft frame is handled generally as rigid body, and in buoyant raft shock-resistant system,
Since raft frame is larger, the flexible deformation of intermediate raft frame has important influence to integral vibration isolation effect.For as rigid centre
For the double-layer vibration isolating device of raft frame, the analytic solutions of vibrating isolation system are obtained there are many classical theories, and pass through theory analysis
To optimize vibration isolating effect.And for buoyant raft shock-resistant system, need to consider the elasticity effect of intermediate raft frame, on mechanics on raft frame
Various equipment and vibration isolator be discrete lumped mass system, and raft frame is flexible distributed mass system, and combination exists
Buoyant Raft Shock-resistant System together is kinetically being referred to as Hybrid dynamic systems.And the dynamic characteristic of Hybrid dynamic systems point
Analysis is always problem kinetically, obtains complete parsing using the method for theory analysis to complicated buoyant raft shock-resistant system
Solution, be also just difficult to disclose deeply in it mechanistic problem, constrain the global optimization of buoyant raft shock-resistant system engineer application.
The vibration isolating effect of double-layer vibration isolating device and the quality of intermediate raft frame are closely related, the general quality for requiring intermediate raft frame
For by 0.5 times or more of device for vibration insutation quality；In double-layer vibration isolating system, the quality of raft frame is bigger, and second-order Mounting frequency is got over
Close to the first rank Mounting frequency, the initial frequency in effective vibration isolation region is lower, and effective vibration isolation range is bigger.It is general next
It says, intermediate raft frame quality is bigger, and vibration isolating effect is better.But for ship, it is being inserted between device for vibration insutation and basis
One intermediate mass is equivalent to and increases an intermediate raft frame without other purposes, occupies valuable control and weight cost.
For the extremely nervous ships used for military purposes in the spaces such as submarine, cost is huge for this.Such as to one 100 tons of host,
According to double-layer vibration isolating, then need additionally to increase the intermediate raft frame that quality is 50 tons or more, not only dramatically increase weight with
Space requirement also greatly improves cost.
Buoyant raft shock-resistant system is similar with double-layer vibration isolating system, and vibration isolating effect is equally closely related with intermediate raft frame quality,
The difference is that being mounted with multiple disturbing sources on its raft frame.On the raft frame of buoyant raft shock-resistant system, existing multiple disturbance equipments,
There is non-disturbance equipment again, both the equipment of flexible installation, also there is the equipment rigidly installed.Disturbance of the different disturbing sources to raft frame
Drive characteristic is different, and final purpose is the exciting force that control is transmitted to hull pedestal by lower layer's vibration isolator.So limited
Under space, weight resources supplIes, such as how the smallest cost realizes that maximum vibration isolating effect is that buoyant raft master-plan needs emphasis
It solves the problems, such as.
Summary of the invention
It is provided it is an object of the invention to demand in view of the above technology a kind of based on quality, tuning, mixed floating to effect
Vibrating isolation system optimum design method is cut down, by disclosing its inherent mechanism to buoyant raft shock-resistant system dynamic analysis, is based on engineering
Design proposes buoyant raft shock-resistant system and installs and configure realization raising vibration isolating effect by vibration isolation, reduces weight-space, in system
Realize that the design principle of line spectrum target is offset and inhibited to vibrational energy in inside.
To achieve the goals above, the present invention adopts the following technical scheme: buoyant raft shock-resistant system based on inherent mechanism
Optimum design method, it is characterised in that: optimize including mass effect optimization, tuning effect optimization and mixed effect of supporting, the quality
Effect is optimized on the intermediate raft frame that non-disturbance equipment is rigidly attached to buoyant raft shock-resistant system；The tuning effect be optimized for by
Non-powered equipment or idle stand-by power equipment are fixed on intermediate raft frame using elastic installation way, as the dynamic of raft frame
Power bump leveller；The mixed power-equipment run while effect is optimized for two or more that supports is resiliently mounted on intermediate raft frame
On；Respectively for above three effect propose different equipment in groups, different installation form scheme, with installation pedestal vibration control
Effect is target, and development scheme is preferred, forms global optimum application isolation scheme.
According to the above scheme, the mass effect optimization specifically comprises the following steps:
A1) non-powered equipment is mounted on intermediate raft frame, including fuel tank, liquid tank, gas cylinder and oil storage cylinder；
A2) stand-by equipment for not running normal condition is rigidly attached on intermediate raft frame；
A3) equipment that will only open in the not high operating condition of acoustical demands, i.e., the hidden idle equipment of operating condition are rigidly attached at
On intermediate raft frame.
According to the above scheme, the tuning effect optimization specifically comprises the following steps:
B1) for the equipment for intending installation on buoyant raft, the drive characteristic of selective analysis equipment confirms and installs equipment on buoyant raft
Principal vibration incentive characteristic line spectrum；
B2) according to vibrational excitation characteristic curve spectrum analysis as a result, main one or several feature line spectrums are selected, as tuning
The object of effect control accurately measures the frequency of its stable state；
B3 the quality m of non-powered equipment or idle stand-by power equipment as dynamic vibration absorber) is selected, as needed
The line spectral frequencies f of control, using line spectral frequencies f as the elastic Mounting frequency of the equipment, according to Mounting frequency selection accordingly every
Vibration device dynamic stiffness.
According to the above scheme, mixed optimize to effect further includes the coated with viscoelastic layer inside intermediate raft frame.
It a kind of cut down vibrating isolation system optimization based on quality, tuning, mixed floating to effect the beneficial effects of the present invention are: providing and sets
Meter method discloses the mass effect of buoyant raft shock-resistant system, tuning effect, mixes and support effect, by rationally utilizing mass effect, adjusting
Humorous effect and it is mixed support effect, vibrating isolation system can be made not only to have met the strict demand such as function, general layout, but be able to achieve optimization every
Shake effect target, for delivery to pedestal exciting force be target, make full use of three effects, it can be achieved that buoyant raft shock-resistant system it is complete
Office is optimal, provides optimum theory method for buoyant raft design in engineering, Buoyant Raft Shock-resistant System vibration isolating effect can be improved and reduce total
Body resource.
Detailed description of the invention
Fig. 1 is the optimization scheme of installation of one embodiment of the invention.
Specific embodiment
Embodiment of the present invention is illustrated now in conjunction with attached drawing, the present invention is not limited to the following examples.
The present invention includes the mechanism of three aspects of buoyant raft shock-resistant system:
1, " mass effect " of buoyant raft.
The quality size of raft frame directly affects buoyant raft vibration isolating effect among Buoyant Raft Shock-resistant System, in general, intermediate raft frame 2
Quality should be 0.5 times or more of maximum power equipment quality on intermediate raft frame, and the increase of intermediate raft frame quality is to submarine etc.
Naval vessels totally bring larger burden.Equipment is rigidly attached on intermediate raft frame, then the quality of equipment can be equivalent to intermediate raft frame
A part of quality.And when equipment elasticity is installed on intermediate raft frame, then elasticity installation equipment 4 conversion to the equivalent matter on raft frame
Amount is smaller, almost without contribution.So the mass effect of buoyant raft is: being installed no motion of equipment as a mass rigid
On intermediate raft frame, the quality that rigidity installs equipment 3 can be equivalent to a part of raft frame quality, increase intermediate raft frame matter
Amount, increases the mass ratio of entire Buoyant Raft Shock-resistant System, to improve vibration isolating effect.Conversely, reaching same vibration isolation effect
Under the premise of fruit, it can accordingly reduce raft frame weight, to reduce the space of naval vessel preciousness, weight resource.Rationally utilize " quality
Effect " can reduce the weight of practical raft frame, reduce useless additional mass to greatest extent.In design, raft can be rigidly fixed in
Equipment on frame mainly includes three classes: first is that non-powered equipment, such as fuel tank, liquid tank, gas cylinder, oil storage cylinder etc.；Second is that backup is used
Power-equipment, for, to improve reliability and active and standby two sets of equipment features for configuring, normal condition not being run on naval vessels
Stand-by equipment is using rigidity installation；Third is that the hidden idle equipment of operating condition will be only in acoustical demands according to equipment operation characteristic
The equipment that not high operating condition is opened rigidly is installed.
2, " tuning effect " of buoyant raft.
The tuning effect of buoyant raft, the equipment of thrum installation is to dynamic tuning characteristic possessed by other equipment and raft frame.
I.e. using the non-powered equipment or idle stand-by power equipment installed on raft frame, is installed using elasticity and be designed as raft frame
One dynamic vibration absorber improves buoyant raft integral vibration isolation to be tuned to one or several feature line spectrum main on raft frame
Effect.It is tuned mounting design using non-disturbance equipment or idle disturbance equipment on submarine, can reduce or eliminate
Structure-borne sound leak point on some Frequency point of buoyant raft, and it is increased without additional impost.
Step 1: the equipment for installation is intended on buoyant raft, the drive characteristic of selective analysis equipment, confirms to install on buoyant raft and set
Standby principal vibration incentive characteristic line spectrum；
Step 2: according to vibrational excitation characteristic curve spectrum analysis as a result, select main one or several feature line spectrums, as
The object of tuning effect control, accurately measures the frequency of its stable state.
Step 3: selecting quality m of the non-disturbance equipment as dynamic vibration absorber, the line spectral frequencies f controlled as needed will
Elastic Mounting frequency of the line spectral frequencies f as the non-disturbance equipment selects corresponding vibration isolator dynamic stiffness according to Mounting frequency.
3, " mixed to support effect " of buoyant raft.
Since buoyant raft raft frame has certain elasticity, when installing multiple disturbance source devices on buoyant raft, multiple disturbing sources are same
When vibrational perturbation is generated on raft frame, more disturbing sources are made defeated due to the influence of the parameters such as amplitude, initial phase and rigidity, damping
Entering to the vibration wave in raft frame has different phase and size, for elastic raft frame, the vibration of various different wave lengths, out of phase
Dynamic component is propagated in elastic raft frame, so that the perturbed force acted on raft frame is generated certain effect of cancelling out each other, is reduced work
With the whole perturbed force on raft frame, energy transmission of the raft frame to hull pedestal 1 is reduced, buoyant raft overall effect is improved.Cause
This, installs the power-equipment elasticity of more different size on the same buoyant raft, can effectively improve " mixed to support " effect of buoyant raft
It answers；In addition, can be improved by the way of coated with viscoelastic layer for high frequency inside raft frame to improve " mixed to support " effect of raft frame
The transmitting of noise is lost.
Buoyant raft " mass effect " proposed by the present invention, " tuning effect ", " mixed to support effect " three effects, are disclosed from mechanism
The principle and inherent law of buoyant raft vibration isolating effect are improved, is designed for engineering buoyant raft and provides optimization method and direction, can had
Under the premise of effect reduces buoyant raft to the aggregate resources cost such as weight, space, the optimized design of buoyant raft vibration isolating effect is realized.It is floating
The theoretical direction that raft technology requires applications stringent, that acoustical demands are high to provide the foundation in Weight controls such as submarines.
" mass effect ", " tuning effect " and " mixed to support effect " for reasonably making good use of buoyant raft, had made buoyant raft shock-resistant system both
Meet the job requirement, general layout and weight demands of system, and be able to satisfy the requirement of vibration isolation optimizing, is one and concerns the overall situation most
Excellent system schema.Three effector mechanisms of buoyant raft proposed by the present invention contain the optimization of buoyant raft additional mass, line spectrum feature
Inhibit the loss with vibrational energy, gives the design process of buoyant raft global optimization.In buoyant raft design, consider to pacify on raft frame comprehensively
The disturbance equipment of dress and non-disturbance equipment elasticity or the reasonable combination rigidly installed, may be implemented to reduce aggregate resource and improve every
The purpose for effect of shaking.
It requires, is proposed respectively for three effects different in conjunction with the scale of buoyant raft shock-resistant system, equipment feature and control
Equipment in groups, different installation form scheme, using installation pedestal vibration control effect as target, it is preferred to carry out scheme, is formed overall
It is optimal to apply isolation scheme.
Claims (4)
1. based on quality, tuning, mixing and cutting down vibrating isolation system optimum design method to the floating of effect, it is characterised in that: imitated including quality
Should optimize, tuning effect optimization and mixed effect of supporting optimize, the mass effect is optimized for for non-disturbance equipment being rigidly attached at floating
On the intermediate raft frame of raft vibrating isolation system；The tuning effect is optimized for adopting non-powered equipment or idle stand-by power equipment
It is fixed on intermediate raft frame with elastic installation way, the dynamic vibration absorber as raft frame；The mixed effect of supporting is optimized for two
The power-equipment run while above is resiliently mounted on intermediate raft frame；Different set is proposed for above three effect respectively
It is standby in groups, different installation form schemes, using installation pedestal vibration control effect as target, it is preferred to carry out scheme, formed it is overall most
It is excellent to apply isolation scheme.
2. the optimum design method of the buoyant raft shock-resistant system according to claim 1 based on inherent mechanism, it is characterised in that
The mass effect optimization specifically comprises the following steps:
A1) non-powered equipment is mounted on intermediate raft frame, including fuel tank, liquid tank, gas cylinder and oil storage cylinder；
A2) stand-by equipment for not running normal condition is rigidly attached on intermediate raft frame；
A3) equipment that will only open in the not high operating condition of acoustical demands, i.e., the hidden idle equipment of operating condition are rigidly attached at centre
On raft frame.
3. the optimum design method of the buoyant raft shock-resistant system according to claim 1 based on inherent mechanism, it is characterised in that
The tuning effect optimization specifically comprises the following steps:
B1) for the equipment for intending installation on buoyant raft, the drive characteristic of selective analysis equipment confirms and installs the main of equipment on buoyant raft
Vibrational excitation feature line spectrum；
B2) according to vibrational excitation characteristic curve spectrum analysis as a result, main one or several feature line spectrums are selected, as tuning effect
The object of control accurately measures the frequency of its stable state；
B3 the quality m of non-powered equipment or idle stand-by power equipment as dynamic vibration absorber) is selected, is controlled as needed
Line spectral frequencies f corresponding vibration isolator is selected according to Mounting frequency using line spectral frequencies f as the elastic Mounting frequency of the equipment
Dynamic stiffness.
4. the optimum design method of the buoyant raft shock-resistant system according to claim 1 based on inherent mechanism, it is characterised in that
Mixed optimize to effect further includes the coated with viscoelastic layer inside intermediate raft frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811423932.1A CN109458430A (en) | 2018-11-27 | 2018-11-27 | Based on quality, tuning, mixes and cut down vibrating isolation system optimum design method to the floating of effect |
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| CN201811423932.1A CN109458430A (en) | 2018-11-27 | 2018-11-27 | Based on quality, tuning, mixes and cut down vibrating isolation system optimum design method to the floating of effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202200005282A1 (en) * | 2022-03-17 | 2022-06-17 | Mv Marine Srl | CUSHIONED PLEASURE VESSEL |
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