CN107167230A - The method that building secondary radiation noise is assessed using building construction vibration attenuation rate - Google Patents
The method that building secondary radiation noise is assessed using building construction vibration attenuation rate Download PDFInfo
- Publication number
- CN107167230A CN107167230A CN201710250493.8A CN201710250493A CN107167230A CN 107167230 A CN107167230 A CN 107167230A CN 201710250493 A CN201710250493 A CN 201710250493A CN 107167230 A CN107167230 A CN 107167230A
- Authority
- CN
- China
- Prior art keywords
- hammer
- point
- mrow
- measuring point
- building
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The embodiments of the invention provide the method that building secondary radiation noise is assessed using building construction vibration attenuation rate, including：Measuring point and multiple hammer points are set in Indoor environment structure, in point layout vibrating speed sensors, vibrating speed sensors connection data collecting instrument；Each hammer point is hammered at least one times by power hammer, power hammer is connected with data collecting instrument；The vibration velocity and the hammer force of hammer point of measuring point when being gathered by vibrating speed sensors, power hammer and data collecting instrument and recording each hammering；Building construction vibration attenuation rate is calculated according to the distance of vibration velocity, hammer force and each hammer point to measuring point；The radiation magnitude and noise reduction of building secondary radiation noise are assessed according to building construction vibration attenuation rate.The method that the embodiment of the present invention is proposed is easy to operate, takes less, eliminates the influence of human factor, and accuracy and reliability are high.
Description
Technical field
The present invention relates to noise detection technique field, more particularly to a kind of test and calculating of building construction vibration attenuation rate
Method, and utilize the radiation magnitude and noise reduction of building construction vibration attenuation rate assessment Indoor environment secondary radiation noise
Method.
Background technology
At present, China has more than 40 city just in Efforts To Develop underground railway construction.Underground railway goes out facilitating citizen
While row, also bring many environmental problems, wherein, subway train operation caused by vibration and noise be main Environmental Problems it
One.Subway line is often passed through from dense population areas, subway train operation can cause along fabric structure vibration, and build
The vibration of structure can produce secondary radiation noise in Indoor environment, largely effect on the life of subway subjective reflection.
When subway not yet opens operation, in order to prevent the secondary radiation noise that metro operation is produced in the future to disturb residents, subway
The sensitive existing building in planning circuit both sides or New Buildings can take corresponding measure to reduce indoor secondary spoke in advance
Noise is penetrated, for example, restriction damping layer or sound insulating layer are laid on floor and wall, or using floating floor etc..Evaluate these measures
Noise reduction depend on the calculating of computer numerical model emulation, but the accuracy of this numerical model emulation mode at present
It is relatively low with reliability, and because the determination of input parameter in numerical model needs human intervention, influenceed larger by human factor.
In addition, for a certain specific building, under conditions of its structure type and construction material are determined, how
The contribution of this structure type and construction material to the radiation magnitude of the Indoor environment secondary radiation noise is evaluated, is also people pass
The problem of note.
The content of the invention
Built The embodiment provides a kind of test of building construction vibration attenuation rate and computational methods, and utilization
The method that building structure vibration attenuation rate assesses Indoor environment secondary radiation noise.
To achieve these goals, this invention takes following technical scheme.
A kind of method that utilization building construction vibration attenuation rate assesses building secondary radiation noise, including：
Measuring point and multiple hammer points are set in Indoor environment structure, in the point layout vibrating speed sensors,
Wherein, the vibrating speed sensors connection data collecting instrument；
Each hammer point is hammered at least one times by power hammer, wherein, the power hammer connects with the data collecting instrument
Connect；
The vibration of measuring point when being gathered by power hammer, vibrating speed sensors and data collecting instrument and recording each hammering
The hammer force of speed and hammer point；
Building construction vibration is calculated according to the distance of the vibration velocity, the hammer force and each hammer point to measuring point
Attenuation rate, wherein, the building construction vibration attenuation rate refers under hammer action, and the vibration that hammer point is produced is in the building
The speed decayed when being propagated in doors structure；
The secondary radiation noise of the building is assessed according to the building construction vibration attenuation rate.
Further, setting measuring point and multiple hammer points in Indoor environment structure, including：
One or more of surveys line are set in Indoor environment structure, at interval of a setpoint distance on every survey line
Value sets a hammer point；
Measuring point is set by first hammer point of every survey line initiating terminal, wherein, first hammer point with it is described
The hammering direction that the distance between vibrating sensor arranged at measuring point is less than or equal on preset value, all hammer points is identical,
The measurement direction of the vibrating speed sensors is identical with the hammering direction on all hammer points.
Further, described method also includes：
A plurality of survey line is set on Indoor environment floor, sets and surveys by first hammer point of every survey line initiating terminal
Point；
A plurality of survey line is set on the wall of Indoor environment, set by first hammer point of every survey line initiating terminal
Measuring point；
One survey line is set on the post of Indoor environment, sets and surveys by first hammer point of the initiating terminal of the survey line
Point；
The vibrating speed sensors of vertical direction are arranged at the measuring point on floor, level is arranged at the measuring point of wall and post
The vibrating speed sensors in direction, wherein, the vibrating speed sensors connect data collecting instrument.
Further, it is described that each hammer point is hammered at least one times by power hammer, wherein, the power hammer and institute
State data collecting instrument connection；When being gathered by power hammer, vibrating speed sensors and data collecting instrument and recording each hammering
The vibration velocity of measuring point and the hammer force of hammer point, including：
Hammered successively on each hammer point according to identical hammering direction using power hammer；
The vibration velocity of measuring point when the vibrating speed sensors gather with data collecting instrument and record each hammering；
The hammer force of hammer point when the power hammer gathers with data collecting instrument and records each hammering.
Further, the distance according to the vibration velocity, the hammer force and each hammer point to measuring point
Building construction vibration attenuation rate is calculated, including；
The vibration velocity and hammer force are handled, 1/3rd frequencys multiplication at corresponding measuring point are hammered every time
Journey vibration velocity frequency response function；
When setting a survey line in the Indoor environment structure, when being located at first hammer point hammering at measuring point
/ 3rd octave vibration velocity frequency response functions are A (x0), 1/3rd frequencys multiplication in n-th of hammer point hammering at measuring point
Journey vibration velocity frequency response function is A (xn), the distance between n-th of hammer point and measuring point are Δ xn, hammer point on the survey line
Quantity is nmax+ 1, then the calculation formula of the building construction vibration attenuation rate SDR is as follows：
When setting a plurality of survey line in the Indoor environment structure, if the quantity of survey line is m, the then building structure
The calculation formula for vibrating attenuation rate SDR is as follows：
Wherein, Am(x0) represent on the m bars survey line, 1/3rd frequencys multiplication in first hammer point hammering at measuring point
Journey vibration velocity frequency response function；Am(xn) represent on the m bars survey line, in the hammering of n-th hammer point at measuring point 1/3rd
Octave vibration velocity frequency response function；Represent on the m bars survey line, the distance between n-th of hammer point and measuring point.
Further, the secondary radiation for assessing the building according to the building construction vibration attenuation rate is made an uproar
Sound, including：
It is located under hammer action, the vibration velocity amplitude of hammer point decays according to exponential form in building structure, then exists
The calculating of vibration velocity amplitude v (x) when the distance away from measuring point is hammers in the Indoor environment structure at x point at measuring point
Formula is as follows：
| v (x) |=| v (x0)e-βx|
Wherein, β is the attenuation coefficient of vibration velocity frequency response function, v (x0) it is in the hammering of first hammer point at measuring point
Vibration velocity amplitude；
Then building secondary radiation Noisy acoustic power W calculation formula is as follows：
Wherein, ρ0For atmospheric density, c0For the velocity of sound, σ is radiance.
Further, the secondary radiation for assessing the building according to the building construction vibration attenuation rate is made an uproar
Sound, in addition to：
What is obtained according to testing takes the building construction vibration attenuation rate before and after noise reduction measure, and calculating is taken before noise reduction measure
The acoustical power of building secondary radiation noise afterwards is poor；
The noise reduction of the noise reduction measure is assessed according to acoustical power difference.
The embodiment of the present invention passes through in building room it can be seen from the technical scheme that embodiments of the invention described above are provided
Measuring point and hammer point are set in inner structure, vibrating speed sensors are arranged at measuring point, each hammer point is carried out by power hammer
Hammer at least one times, hammered into shape according to power, each hammering that vibrating speed sensors and data collecting instrument are gathered and recorded when measuring point
The distance of the hammer force and each hammer point of vibration velocity and hammer point to measuring point calculates building construction vibration attenuation rate, can be with
It is effectively measuring go out building structure vibration attenuation rate, and then can be built using the vibration attenuation rate index of building structure to evaluate
The noise reduction of noise reduction measure in thing is built, and evaluates the room of specific constructive form and construction material to the building of building
The contribution of interior secondary radiation noise radiation magnitude.The method that the embodiment of the present invention is proposed is easy to operate, takes less, eliminates artificial
The influence of factor, accuracy and reliability are high.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 assesses building secondary radiation using building construction vibration attenuation rate for one kind provided in an embodiment of the present invention and made an uproar
The flow chart of the method for sound；
Fig. 2 is a kind of measuring point on rectangle floor provided in an embodiment of the present invention and the arrangement schematic diagram of hammer point；
Fig. 3 is a kind of measuring point of rectangle wall provided in an embodiment of the present invention and the arrangement schematic diagram of hammer point；
Fig. 4 is a kind of measuring point of post provided in an embodiment of the present invention and the arrangement schematic diagram of hammer point.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
The art those of ordinary skill is appreciated that unless expressly stated, singulative " one " used herein,
" one ", " described " and "the" may also comprise plural form.It is to be further understood that used in the specification of the present invention
Wording " comprising " refers to there is the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or add
Plus other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim
Element is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also deposit
In intermediary element.In addition, " connection " used herein or " coupling " can include wireless connection or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combined.
The art those of ordinary skill is appreciated that unless otherwise defined, all terms used herein (including skill
Art term and scientific terminology) with the general understanding identical meaning with the those of ordinary skill in art of the present invention.Also
It should be understood that those terms defined in such as general dictionary should be understood that with the context of prior art
The consistent meaning of meaning, and unless defined as here, will not be explained with idealization or excessively formal implication.
For ease of the understanding to the embodiment of the present invention, done below in conjunction with accompanying drawing by taking several specific embodiments as an example further
Ground is illustrated, and each embodiment does not constitute the restriction to the embodiment of the present invention.
The embodiment of the present invention defines the vibration attenuation rate index of building structure, it is proposed that the building construction vibration attenuation rate
The test of index and computational methods, and then assess Indoor environment noise reduction measure using this building construction vibration attenuation rate index
Noise reduction, and assess building specific constructive form and construction material to Indoor environment secondary radiation noise radiation
The contribution of magnitude.
Fig. 1 is that one kind provided in an embodiment of the present invention is made an uproar using the assessment building secondary radiation of building construction vibration attenuation rate
The flow chart of the method for sound.As shown in figure 1, this method comprises the following steps.
Step S110, sets measuring point and multiple hammer points in Indoor environment structure, and speed is vibrated in the point layout
Sensor is spent, wherein, the vibrating speed sensors connect data collecting instrument.
Step S120, is hammered at least one times by power hammer to each hammer point, wherein, the power hammer and the data
Acquisition Instrument is connected.
Step S130, when being gathered by power hammer, vibrating speed sensors and data collecting instrument and recording each hammering
The vibration velocity of measuring point and the hammer force of hammer point.
Step S140, calculates according to the distance of the vibration velocity, the hammer force and each hammer point to measuring point and builds
Building structure vibrates attenuation rate, wherein, the building construction vibration attenuation rate refers under hammer action, and the vibration that hammer point is produced exists
The speed decayed when being propagated in the Indoor environment structure.
Step S150, the secondary radiation noise of the building is assessed according to the building construction vibration attenuation rate.
According to embodiments of the present invention, building secondary radiation noise refers to by building structure (such as beam, plate, cylinder system)
Vibration caused by building room noise.The acoustical power of Indoor environment secondary radiation noise can be used to assess the interior two
The radiation magnitude of secondary radiated noise.Specifically, the acoustical power of indoor secondary radiated noise is bigger, represents indoor secondary radiated noise
Radiation magnitude it is bigger, also just explanation indoor secondary radiated noise it is bigger；The acoustical power of indoor secondary radiated noise is smaller, represents
The radiation magnitude of indoor secondary radiated noise is smaller, illustrates that indoor secondary radiated noise is smaller.
The acoustical power of Indoor environment secondary radiation noise has following relation with structural vibration speed：
In above formula, W is the acoustical power of indoor secondary radiated noise, ρ0For atmospheric density, c0For the velocity of sound, σ is radiance, and S is
Structural radiation area,For the mean squared vibration speed on structural radiation area.
, on the one hand can be by reducing because there is above-mentioned relation between indoor secondary radiated noise and structural vibration
Structural vibration reduces indoor secondary radiated noise；On the other hand, indoor secondary spoke can be assessed by test structure vibration
Penetrate noise.The embodiment of the present invention gives building construction vibration attenuation rate index and its test needed for test architecture structural vibration
Method.
According to embodiments of the present invention, building construction vibration attenuation rate is defined as follows：Under outside incentive action, point is encouraged
The speed that produced vibration decays when being propagated in Indoor environment structure.According to embodiments of the present invention, said external is encouraged
Can be hammer stimulating, excitation point is hammer point, therefore the building construction vibration attenuation rate can refer under hammer action, hammering
The speed that the vibration that point is produced decays when being propagated in Indoor environment structure.
If building construction vibration attenuation rate is big, then it represents that vibration decays very fast in structure；If building construction vibration is decayed
Rate is small, then it represents that vibration decays slower in structure.If implemented after certain noise reduction measure, building construction vibration attenuation rate increases
Greatly, then it represents that this measure has noise reduction；The increase of building construction vibration attenuation rate is more, then it represents that noise reduction is better.
Building construction vibration attenuation rate is the inherent characteristic of structure, and only the structure type and material properties with building have
Close, and it is unrelated with external drive.If under the conditions of the specific structure form and construction material of a certain building, building structure is shaken
Dynamic attenuation rate is smaller, then it represents that the spoke of the indoor secondary radiated noise of the building under the conditions of this structure type and construction material
Penetrating magnitude can be larger, namely indoor secondary radiated noise can be larger.
Test and the computational methods of building construction vibration attenuation rate are explained in detail below.
First, one or more of surveys line are set in Indoor environment structure, set on every survey line at interval of one
Set a distance value sets a hammer point.The embodiment of the present invention is illustrated using the setpoint distance value as 0.2 meter.In every survey
Measuring point is set by first hammer point of line initiating terminal, and first hammer point will be close to measuring point and the measuring point should be close proximity to wall
Wall or floor.The embodiment of the present invention is illustrated by measuring point exemplified by 0.1 meter of wall or floor.Specifically, on floor
Measuring point, the measuring point is apart from 0.1 meter of wall, for the measuring point on wall or post, and the measuring point is apart from 0.1 meter of floor.At measuring point
Arrange vibrating speed sensors.According to embodiments of the present invention, first close proximity between hammer point and measuring point refers to first
Hammer point should be close to the vibrating speed sensors at measuring point, i.e., first hammer point and the vibration velocity at measuring point as much as possible
The distance between sensor is less than or equal to a preset value, and the preset value should be as close possible to 0, and the embodiment of the present invention is with this
Preset value be 1 centimetre exemplified by illustrate.The vibrating speed sensors are connected by wired or wireless form and data collecting instrument
Connect, the embodiment of the present invention is not specifically limited to connected mode.Hammering direction on all hammer points is identical, above-mentioned vibration velocity
The measurement direction of sensor is identical with the hammering direction on all hammer points.
Then, hammered successively on each hammer point according to identical hammering direction using power hammer.The power is hammered into shape with before
The data collecting instrument connection stated.Every time during hammering, the vibrating speed sensors and data collecting instrument cooperate to collection simultaneously
The vibration velocity of measuring point is recorded, the power hammer and data collecting instrument cooperate to gather and record the hammer force of hammer point.
Above-mentioned vibration velocity and hammering force data are handled, 1/3rd at corresponding measuring point are hammered every time
Octave vibration velocity frequency response function.According to embodiments of the present invention, 1/3rd octave vibration velocity frequency response functions refer to three
The vibration velocity response of the lower measuring point of unit hammer force effect in/mono- octave.
According to embodiments of the present invention, the calculation formula of building construction vibration attenuation rate can derive as follows.
Be located in Indoor environment structure and be provided with a survey line, it is assumed that under hammer action, structural vibration wave amplitude from
Hammer point starts according to exponential damping in structure, and 1/3rd octaves when being located at first hammer point hammering at measuring point are shaken
Dynamic speed frequency response function is A (x0), then 1/3rd octaves when the distance away from measuring point is hammers at x point at measuring point are shaken
Dynamic speed frequency response function A (x) can be expressed as：
A(x)≈A(x0)e-βx (2)
Wherein, β is the attenuation coefficient of vibration velocity frequency response function, and the coefficient is converted into building construction vibration attenuation rate
Form, then have：
SDR=20log10(eβThe β of)=8.686 (3)
Wherein, SDR is building construction vibration attenuation rate.
Building structure radiates vibrational energy and β relation and can be expressed as：
According to embodiments of the present invention, hammer point can be several discrete points, if the quantity of hammer point is n on this bar survey linemax
+ 1, then formula (4) form can be expressed as：
Wherein, Δ xnFor the distance between n-th of hammer point and measuring point, A (xn) it is the measuring point in n-th of hammer point hammering
/ 3rd octave vibration velocity frequency response functions at place.
Convolution (3) and formula (5), can be obtained：
Formula (6) is public for the calculating of the building construction vibration attenuation rate in Indoor environment structure during one survey line of setting
Formula.If being provided with a plurality of survey line in Indoor environment structure, the corresponding building construction vibration of every survey line is first calculated respectively
Attenuation rate, then the average value of the corresponding building construction vibration attenuation rate of a plurality of survey line is calculated, the average value is that the structure is final
Building construction vibration attenuation rate.Specifically, if the quantity of survey line is m, then building construction vibration attenuation rate is represented by：
Wherein, Am(x0) represent on the m bars survey line, 1/3rd frequencys multiplication in first hammer point hammering at measuring point
Journey vibration velocity frequency response function；Am(xn) represent on the m bars survey line, in the hammering of n-th hammer point at measuring point 1/3rd
Octave vibration velocity frequency response function；Represent on the m bars survey line, the distance between n-th of hammer point and measuring point.
Moreover, it is assumed that under hammer action, the vibration velocity amplitude of hammer point declines according to exponential form in building structure
Subtract, then vibration velocity amplitude when being hammered at the point that the distance away from measuring point is x in building structure at measuring point is：
| v (x) |=| v (x0)e-βx| (8)
Wherein, v (x0) it is vibration velocity amplitude in the hammering of first hammer point at measuring point.Then formula (1) can be represented
For：
Formula (9) illustrates Indoor environment secondary radiation Noisy acoustic power W and building construction vibration attenuation rate SDR pass
System, i.e., SDR is bigger, and W is smaller；SDR is smaller, and W is bigger.According to embodiments of the present invention, indoor secondary radiated noise sound work(can be used
Rate weighs the radiation magnitude of indoor secondary radiated noise, i.e. acoustical power is bigger, represents the amount of radiation of indoor secondary radiated noise
Level is bigger.Simultaneously as building construction vibration attenuation rate is the inherent feature of building structure, the only concrete structure shape with building
Formula is relevant with construction material, it is possible to assessed using building construction vibration attenuation rate in specific constructive form and construction material
Under the conditions of Indoor environment secondary radiation noise radiation magnitude, i.e., W is calculated by SDR, recycles W to assess indoor secondary spoke
Penetrate the radiation magnitude of noise.
If in addition, employing certain noise reduction measure on fabric structure, restriction damping layer is such as laid on floor, then
The noise reduction of such a measure can be assessed using building construction vibration attenuation rate.According to embodiments of the present invention, pass through first
Test respectively obtains the building construction vibration attenuation rate taken before and after the noise reduction measure, then calculates before and after taking the noise reduction measure
Indoor environment secondary radiation noise acoustical power it is poor, it is secondary further according to the Indoor environment taken before and after noise reduction measure
The acoustical power difference of radiated noise assesses the noise reduction of the noise reduction measure.Specifically, before using noise reduction measure, measurement building
Structural vibration attenuation rate SDR1, according to SDR1The acoustical power W of indoor secondary radiated noise can be calculated1：
After using noise reduction measure, then measure building construction vibration attenuation rate SDR2, according to SDR2Indoor secondary spoke is calculated again
Penetrate the acoustical power W of noise2：
It can be then calculated as follows using the difference of Indoor environment secondary radiation Noisy acoustic power before and after the noise reduction measure：
Δ W=W1-W2 (12)
According to embodiments of the present invention, the noise reduction of the noise reduction measure can be assessed with Δ W, i.e. Δ W is bigger, illustrates the drop
Make an uproar measure noise reduction it is better.
In addition, by taking the structures such as the floor of Indoor environment, wall and post as an example, the embodiment of the present invention is given using hammer
The method for hitting excitation on-the-spot test building construction vibration attenuation rate.It will appreciated by the skilled person that described herein
Building structure can be the structure in floor, wall, post or other buildings, such as beam, and the embodiment of the present invention is to this
It is not especially limited.According to embodiments of the present invention, the side of above-mentioned use hammer stimulating on-the-spot test building construction vibration attenuation rate
Method may include following processing procedure.
Step 1, the position of measuring point and hammer point is determined.
A plurality of survey line is set on Indoor environment floor, sets and surveys by first hammer point of every survey line initiating terminal
Point；A plurality of survey line is set on the wall of Indoor environment, measuring point is set by first hammer point of every survey line initiating terminal；
One survey line is set on the post of Indoor environment, measuring point is set by first hammer point of the initiating terminal of survey line.Wherein, survey
The arrangement principle of point and hammer point is as it was previously stated, will not be repeated here.
According to embodiments of the present invention, measuring point and hammer point are divided into floor, wall, post three kinds of operating modes and arranged.For floor,
The embodiment of the present invention provides the measuring point on rectangle floor and the arrangement example of hammer point, and the floor of other shapes can be in concrete analysis
The arrangement principle with reference to rectangle floor carries out measuring point and hammer point arrangement afterwards, and the embodiment of the present invention will not be repeated here.It is rectangular
Measuring point and the hammer point arrangement on shape floor are as shown in Fig. 2 be located at the arrangement of the long side side on rectangle floor including measuring point
Figure and measuring point are located at the layout drawing of the short side side on rectangle floor.Measuring point and the hammer point arrangement of wall are as shown in Figure 3.Post
Measuring point and hammer point arrangement it is as shown in Figure 4.
In addition, a plurality of survey line intersects at measuring point in the example that Fig. 2 and Fig. 3 are provided, it is arranged so as to be conducive to reducing always
Testing time.According to embodiments of the present invention, a plurality of survey line can intersect also non-intersect, and the embodiment of the present invention does not do specific limit to this
It is fixed.
Step 2, vibrating speed sensors, vibrating speed sensors connection data collecting instrument are arranged at measuring point.
According to embodiments of the present invention, the vibrating speed sensors of vertical direction are arranged at the measuring point of floor, in wall and post
Measuring point at arrange horizontal direction vibrating speed sensors.
Step 3, each hammer point is hammered using power hammer, power hammer is connected with the data collecting instrument in step 2.
The vibration velocity data of measuring point, power when vibrating speed sensors can gather and record each hammering with data collecting instrument
The hammering force data of hammer point when hammer can gather and record each hammering with data collecting instrument.
Step 4, after the hammering of all hammer points is finished, vibrating speed sensors, power hammer, data collecting instrument etc. is removed and is set
It is standby.Data processing is carried out, the vibration attenuation rate for obtaining building structure is calculated according to formula (7).
In summary, the embodiment of the present invention propose method can with effectively measuring building construction vibration attenuation rate, and then
The noise reduction of noise reduction measure in building can be assessed using building construction vibration attenuation rate index, and assesses building
The radiation magnitude of indoor secondary radiated noise under the conditions of specific constructive form and construction material.
At present, when subway train not yet opens operation, for taking steps to reduction building room in building structure
The evaluation of the noise reduction of interior secondary radiation noise and in the case of building specific constructive form and construction material to building
Thing indoor secondary radiated noise radiates the assessment of magnitude, depends on computer numerical model emulation method.This Numerical-Mode
Type emulation mode needs to set up complicated numerical model and carries out substantial amounts of calculating, and time-consuming more, accuracy and reliability are relatively low；
And because the determination of input parameter in numerical model needs human intervention, so this numerical model emulation mode by it is artificial because
The influence of element is larger.And the building construction vibration attenuation rate index that the embodiment of the present invention is proposed can be used for assessing drop in building
Make an uproar measure noise reduction and assess under the conditions of building specific constructive form and construction material the subradius of Indoor environment two
Penetrate the radiation magnitude of noise.The building construction vibration attenuation rate index clear concept, can be determined by the method for field experiment.
The method that the embodiment of the present invention is proposed is easy to operate, takes less, eliminates the influence of human factor, and accuracy and reliability are high.
One of ordinary skill in the art will appreciate that：Accompanying drawing be module in the schematic diagram of one embodiment, accompanying drawing or
Flow is not necessarily implemented necessary to the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
Realized by the mode of software plus required general hardware platform.Understood based on such, technical scheme essence
On the part that is contributed in other words to prior art can be embodied in the form of software product, the computer software product
It can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are to cause a computer equipment
(can be personal computer, server, or network equipment etc.) performs some of each of the invention embodiment or embodiment
Method described in part.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment was stressed is the difference with other embodiment.Especially for device or
For system embodiment, because it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method
The part explanation of embodiment.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates can be or may not be it is physically separate, the part shown as unit can be or
Person may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can root
Some or all of module therein is factually selected to realize the purpose of this embodiment scheme the need for border.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (7)
1. a kind of method that utilization building construction vibration attenuation rate assesses building secondary radiation noise, it is characterised in that including：
Measuring point and multiple hammer points are set in Indoor environment structure, in the point layout vibrating speed sensors, wherein,
The vibrating speed sensors connect data collecting instrument；
Each hammer point is hammered at least one times by power hammer, wherein, the power hammer is connected with the data collecting instrument；
The vibration velocity of measuring point when being gathered by power hammer, vibrating speed sensors and data collecting instrument and recording each hammering
With the hammer force of hammer point；
Building construction vibration decay is calculated according to the distance of the vibration velocity, the hammer force and each hammer point to measuring point
Rate, wherein, the building construction vibration attenuation rate refers under hammer action, and the vibration that hammer point is produced is in the Indoor environment
The speed decayed when being propagated in structure；
The secondary radiation noise of the building is assessed according to the building construction vibration attenuation rate.
2. according to the method described in claim 1, it is characterised in that described that measuring point is set in Indoor environment structure and many
Individual hammer point, including：
One or more of surveys line are set in Indoor environment structure, set on every survey line at interval of a setpoint distance value
Put a hammer point；
Measuring point is set by first hammer point of every survey line initiating terminal, wherein, first hammer point and the measuring point
The hammering direction that the distance between vibrating sensor of place's arrangement is less than or equal on preset value, all hammer points is identical, described
The measurement direction of vibrating speed sensors is identical with the hammering direction on all hammer points.
3. method according to claim 2, it is characterised in that described method also includes：
A plurality of survey line is set on Indoor environment floor, measuring point is set by first hammer point of every survey line initiating terminal；
A plurality of survey line is set on the wall of Indoor environment, sets and surveys by first hammer point of every survey line initiating terminal
Point；
One survey line is set on the post of Indoor environment, measuring point is set by first hammer point of the initiating terminal of the survey line；
The vibrating speed sensors of vertical direction are arranged at the measuring point on floor, horizontal direction is arranged at the measuring point of wall and post
Vibrating speed sensors, wherein, the vibrating speed sensors connect data collecting instrument.
4. according to the method in claim 2 or 3, it is characterised in that it is described by power hammer each hammer point is carried out to
It is few once to hammer, wherein, the power hammer is connected with the data collecting instrument；Pass through power hammer, vibrating speed sensors sum
The vibration velocity and the hammer force of hammer point of measuring point when being gathered according to Acquisition Instrument and recording each hammering, including：
Hammered successively on each hammer point according to identical hammering direction using power hammer；
The vibration velocity of measuring point when the vibrating speed sensors gather with data collecting instrument and record each hammering；
The hammer force of hammer point when the power hammer gathers with data collecting instrument and records each hammering.
5. method according to claim 4, it is characterised in that it is described according to the vibration velocity, the hammer force with
And the distance of each hammer point to measuring point calculates building construction vibration attenuation rate, including；
The vibration velocity and hammer force are handled, 1/3rd octaves at corresponding measuring point are hammered every time and are shaken
Dynamic speed frequency response function；
When setting a survey line in the Indoor environment structure, three points when being located at first hammer point hammering at measuring point
One of octave vibration velocity frequency response function be A (x0), 1/3rd octaves in n-th of hammer point hammering at measuring point are shaken
Dynamic speed frequency response function is A (xn), the distance between n-th of hammer point and measuring point are Δ xn, the quantity of hammer point on the survey line
For nmax+ 1, then the calculation formula of the building construction vibration attenuation rate SDR is as follows：
<mrow>
<mi>S</mi>
<mi>D</mi>
<mi>R</mi>
<mo>=</mo>
<mfrac>
<mn>4.343</mn>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>n</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<msub>
<mi>n</mi>
<mi>max</mi>
</msub>
</munderover>
<mfrac>
<mrow>
<mo>|</mo>
<mi>A</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mi>n</mi>
</msub>
<mo>)</mo>
</mrow>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mo>|</mo>
<mi>A</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
<msub>
<mi>&Delta;x</mi>
<mi>n</mi>
</msub>
</mrow>
</mfrac>
</mrow>
When setting a plurality of survey line in the Indoor environment structure, if the quantity of survey line is m, the then building construction vibration
Attenuation rate SDR calculation formula is as follows：
<mrow>
<mi>S</mi>
<mi>D</mi>
<mi>R</mi>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mi>m</mi>
</mfrac>
<munderover>
<mo>&Sigma;</mo>
<mn>1</mn>
<mi>m</mi>
</munderover>
<mfrac>
<mn>4.343</mn>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>n</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<msub>
<mi>n</mi>
<mi>max</mi>
</msub>
</munderover>
<mfrac>
<mrow>
<mo>|</mo>
<msup>
<mi>A</mi>
<mi>m</mi>
</msup>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mi>n</mi>
</msub>
<mo>)</mo>
</mrow>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mo>|</mo>
<msup>
<mi>A</mi>
<mi>m</mi>
</msup>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
<msup>
<mo>|</mo>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
<msubsup>
<mi>&Delta;x</mi>
<mi>n</mi>
<mi>m</mi>
</msubsup>
</mrow>
</mfrac>
</mrow>
Wherein, Am(x0) represent on the m bars survey line, 1/3rd octaves in first hammer point hammering at measuring point are shaken
Dynamic speed frequency response function；Am(xn) represent on the m bars survey line, 1/3rd frequencys multiplication in n-th of hammer point hammering at measuring point
Journey vibration velocity frequency response function；Represent on the m bars survey line, the distance between n-th of hammer point and measuring point.
6. method according to claim 5, it is characterised in that described to be assessed according to the building construction vibration attenuation rate
The secondary radiation noise of the building, including：
It is located under hammer action, the vibration velocity amplitude of hammer point decays according to exponential form in building structure, then described
The calculation formula of vibration velocity amplitude v (x) when the distance away from measuring point is hammers in Indoor environment structure at x point at measuring point
It is as follows：
| v (x) |=| v (x0)e-βx|
| v (x) |=| v (x0) e- β x |
Wherein, β is the attenuation coefficient of vibration velocity frequency response function, v (x0) it is vibration in the hammering of first hammer point at measuring point
Velocity amplitude；
Then building secondary radiation Noisy acoustic power W calculation formula is as follows：
<mrow>
<mi>W</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mn>4.343</mn>
<msub>
<mi>&rho;</mi>
<mn>0</mn>
</msub>
<msub>
<mi>c</mi>
<mn>0</mn>
</msub>
<msup>
<mi>&sigma;v</mi>
<mn>2</mn>
</msup>
<mrow>
<mo>(</mo>
<msub>
<mi>x</mi>
<mn>0</mn>
</msub>
<mo>)</mo>
</mrow>
</mrow>
<mrow>
<mi>S</mi>
<mi>D</mi>
<mi>R</mi>
</mrow>
</mfrac>
</mrow>
Wherein, ρ0For atmospheric density, c0For the velocity of sound, σ is radiance.
7. the method according to any one of claim 1 to 6, it is characterised in that described according to the building construction vibration
Attenuation rate assesses the secondary radiation noise of the building, in addition to：
What is obtained according to testing takes the building construction vibration attenuation rate before and after noise reduction measure, and calculating is taken before and after noise reduction measure
The acoustical power of building secondary radiation noise is poor；
The noise reduction of the noise reduction measure is assessed according to acoustical power difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710250493.8A CN107167230B (en) | 2017-04-17 | 2017-04-17 | Utilize the method for building construction vibration attenuation rate assessment building secondary radiation noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710250493.8A CN107167230B (en) | 2017-04-17 | 2017-04-17 | Utilize the method for building construction vibration attenuation rate assessment building secondary radiation noise |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107167230A true CN107167230A (en) | 2017-09-15 |
| CN107167230B CN107167230B (en) | 2019-06-28 |
Family
ID=59849080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710250493.8A Active CN107167230B (en) | 2017-04-17 | 2017-04-17 | Utilize the method for building construction vibration attenuation rate assessment building secondary radiation noise |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107167230B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112948987A (en) * | 2021-01-15 | 2021-06-11 | 西南交通大学 | Comprehensive evaluation method for sound vibration performance and service performance of vibration reduction track |
| CN115828358A (en) * | 2022-09-14 | 2023-03-21 | 中国铁路设计集团有限公司 | Vehicle section upper cover building vibration reduction design method based on secondary structure noise control |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102880767A (en) * | 2012-10-19 | 2013-01-16 | 西南交通大学 | Method for predicating noise simulation of rail transit bridge structure |
| CN105510009A (en) * | 2015-11-25 | 2016-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Pedestal vibration and structural noise testing analytical apparatus for gas turbine |
| CN205874857U (en) * | 2016-08-01 | 2017-01-11 | 南京润超铁路配件有限公司 | High -efficient underground railway track abatvoix |
-
2017
- 2017-04-17 CN CN201710250493.8A patent/CN107167230B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102880767A (en) * | 2012-10-19 | 2013-01-16 | 西南交通大学 | Method for predicating noise simulation of rail transit bridge structure |
| CN105510009A (en) * | 2015-11-25 | 2016-04-20 | 沈阳黎明航空发动机(集团)有限责任公司 | Pedestal vibration and structural noise testing analytical apparatus for gas turbine |
| CN205874857U (en) * | 2016-08-01 | 2017-01-11 | 南京润超铁路配件有限公司 | High -efficient underground railway track abatvoix |
Non-Patent Citations (3)
| Title |
|---|
| 储益萍: "地铁引起的结构振动与噪声及其相关性分析", 《噪声与振动控制》 * |
| 刘卫丰等: "北京地铁采用调频式钢轨减振器抑制钢轨振动的试验研究", 《振动工程学报》 * |
| 孙晓静等: "轨道系统钢轨振动衰减率动力测试研究", 《铁道工程学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112948987A (en) * | 2021-01-15 | 2021-06-11 | 西南交通大学 | Comprehensive evaluation method for sound vibration performance and service performance of vibration reduction track |
| CN115828358A (en) * | 2022-09-14 | 2023-03-21 | 中国铁路设计集团有限公司 | Vehicle section upper cover building vibration reduction design method based on secondary structure noise control |
| CN115828358B (en) * | 2022-09-14 | 2024-03-26 | 中国铁路设计集团有限公司 | Vehicle section upper cover building vibration reduction design method based on secondary structure noise control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107167230B (en) | 2019-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Coulier et al. | Experimental and numerical evaluation of the effectiveness of a stiff wave barrier in the soil | |
| Woods | Dynamic effects of pile installations on adjacent structures | |
| Newland et al. | Isolation of buildings from ground vibration: a review of recent progress | |
| Kim et al. | A shear wave velocity tomography system for geotechnical centrifuge testing | |
| CN108491646A (en) | A kind of tunnel low coverage passes through the identification method that important building explosion causes vibration damage | |
| Li et al. | Building coupling loss measurement and prediction due to train-induced vertical vibrations | |
| Ha et al. | Simulation of soil–foundation–structure interaction of Hualien large-scale seismic test using dynamic centrifuge test | |
| Azzara et al. | Experimental and numerical investigations on the seismic behaviour of the San Frediano bell tower in Lucca | |
| CN107167230A (en) | The method that building secondary radiation noise is assessed using building construction vibration attenuation rate | |
| Lai et al. | Prediction of railway-induced ground vibrations in tunnels | |
| CN106323575A (en) | Method for testing performance of reinforced concrete frame structure of bottom concrete-filled steel-tubular column | |
| Calcina et al. | Vibration analysis of historic bell towers by means of contact and remote sensing measurements | |
| JP2003042892A (en) | Method of evaluating dynamic earthquake resistance of building | |
| CN104807607B (en) | The structures Defect inspection system and its detection method of spectral property are responded during based on excitation state | |
| CN116502307A (en) | Method for evaluating influence of subway operation on vibration and secondary noise of adjacent building projects | |
| CN116090051A (en) | Method and device for establishing rail transit-soil-structure coupling model | |
| Chui | VIBRATIONAL PERFORMANCE OF WOODEN FLOORS IN DOMESTIC DWELLINGS. | |
| François et al. | A 2.5 D finite element-boundary element model for vibration isolating screens | |
| Attenborough et al. | Overview of the theoretical development and experimental validation of blast sound-absorbing surfaces | |
| JP6997431B2 (en) | How to determine the amount of displacement of a building due to an earthquake | |
| JP2002348949A (en) | Dynamic seismic resistance assessment system for building | |
| JP3285787B2 (en) | Countermeasure effect judgment method and countermeasure effect judgment device | |
| JP3696298B2 (en) | Seismic evaluation method and apparatus for buildings | |
| Chen et al. | Evaluation of ground vibration induced by high-speed trains on embankments | |
| Dashti | A Ground Borne Noise Prediction Model for Railway Traffic in Tunnels in Bedrock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221011 Address after: 100176 601, Floor 6, Building 2, No. 19 Courtyard, Kechuang 9th Street, Beijing Economic and Technological Development Zone, Daxing District, Beijing (Yizhuang Cluster, High end Industrial Zone, Beijing Pilot Free Trade Zone) Patentee after: Beijiao Zhen'an Rail Technology (Beijing) Co.,Ltd. Address before: 100044 Beijing city Haidian District Xizhimen Shangyuan Village No. 3 Patentee before: Beijing Jiaotong University |
|
| TR01 | Transfer of patent right |