CN110907109A - Cylindrical shell modal vibration sound radiation testing device based on laser scanning - Google Patents
Cylindrical shell modal vibration sound radiation testing device based on laser scanning Download PDFInfo
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- CN110907109A CN110907109A CN201911267913.9A CN201911267913A CN110907109A CN 110907109 A CN110907109 A CN 110907109A CN 201911267913 A CN201911267913 A CN 201911267913A CN 110907109 A CN110907109 A CN 110907109A
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- cylindrical shell
- vibration
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- shell
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
Abstract
The invention discloses a cylindrical shell modal vibration sound radiation testing device based on laser scanning, and relates to the field of cylindrical shell modal vibration sound radiation testing devices. The invention utilizes the testing devices comprising the exciting device, the laser vibration meter translation device, the shell rotating device, the data acquisition analyzer, the microprocessor and the like to measure the characteristic parameters of the cylindrical shell vibration such as the modal vibration mode, the natural frequency, the damping and the like under any boundary conditions, can directly measure the sound pressure (near field or far field) or the sound power through experiments or indirectly calculate the sound pressure (near field or far field) or the sound power generated by the cylindrical shell vibration through measuring the shell vibration velocity, and has certain application prospect.
Description
Technical Field
The invention relates to the field of cylindrical shell modal vibration sound radiation testing devices, in particular to a cylindrical shell modal vibration sound radiation testing device based on laser scanning.
Background
The cylindrical shell is a typical engineering structural member and widely applied to aviation, aerospace and other general mechanical equipment, such as a case of an aircraft engine, various cabin bodies of a spacecraft and a rotary drum in a granulator, and the obtained modal shape of the cylindrical shell has important significance on the dynamic design and vibration suppression of the structural member.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a cylindrical shell modal vibration acoustic radiation testing device based on laser scanning, and laser vibration measurement is a novel vibration testing technology, and a modal vibration mode with an approximate plane structure can be quickly and accurately obtained through a full-field scanning type laser vibration meter.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a cylinder shell modal vibration acoustic radiation testing arrangement based on laser scanning, includes excitation device, laser vibrometer translation device, casing rotary device, data acquisition analysis appearance, microprocessor and constant voltage power supply, casing rotary device is located excitation device's upper end, the laser vibrometer is located casing rotary device's top, laser vibrometer translation device is located the rear end of laser vibrometer, the data acquisition analysis appearance is located one side of laser vibrometer, the microprocessor is located one side of data acquisition analysis appearance, constant voltage power supply is located excitation device's lower extreme.
Preferably, the outer surface of the shell rotating device is provided with a cylindrical shell, the shell rotating device is used for driving the cylindrical shell to rotate, and the exciting device is used for exciting the cylindrical shell to generate stable vibration.
Preferably, the laser vibration meter is used for emitting laser beams, and the laser vibration meter is moved by the laser vibration meter translation device to carry out omnibearing laser scanning on the cylindrical shell on the outer surface of the shell rotating device.
Preferably, the stabilized voltage power supply is electrically connected with the excitation device, the stabilized voltage power supply is electrically connected with the shell rotating device, the stabilized voltage power supply is electrically connected with the laser vibration meter, the laser vibration meter is electrically connected with the data acquisition and analysis meter, and the data acquisition and analysis meter is electrically connected with the microprocessor.
Preferably, the data acquisition analyzer is used for acquiring and recording the vibration response signal of the cylindrical shell in real time and transmitting the vibration response signal to the microprocessor.
Preferably, the microprocessor is used for analyzing and calculating the vibration response signal of the cylindrical shell, and finally drawing the pseudo-mode shape of the cylindrical shell.
Compared with the prior art, the invention has the beneficial effects that:
the invention can utilize the testing devices comprising the exciting device, the laser vibration meter translation device, the shell rotating device, the data acquisition analyzer, the microprocessor and the like to measure the characteristic parameters of the cylindrical shell vibration such as modal vibration mode, natural frequency, damping and the like under any boundary conditions, can directly measure the sound pressure (near field or far field) or the sound power through experiments or indirectly calculate the sound pressure (near field or far field) or the sound power generated by the cylindrical shell vibration through measuring the shell vibration velocity, and is beneficial to the use of people.
Drawings
FIG. 1 is a schematic structural diagram of a cylindrical shell modal vibration acoustic radiation testing device based on laser scanning according to the present invention;
FIG. 2 is a schematic connection diagram of a cylindrical shell modal vibration acoustic radiation testing device based on laser scanning according to the present invention;
in the figure: 1. an excitation device; 2. a laser vibrometer; 3. a laser vibrometer translation device; 4. a housing rotating device; 5. a data acquisition analyzer; 6. a microprocessor; 7. a regulated power supply.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a cylinder shell modal vibration acoustic radiation testing arrangement based on laser scanning, including exciting arrangement 1, laser vibrometer 2, laser vibrometer translation device 3, casing rotary device 4, data acquisition analysis appearance 5, microprocessor 6 and constant voltage power supply 7, casing rotary device 4 is located exciting arrangement 1's upper end, laser vibrometer 2 is located casing rotary device 4's top, laser vibrometer translation device 3 is located the rear end of laser vibrometer 2, data acquisition analysis appearance 5 is located one side of laser vibrometer 2, microprocessor 6 is located one side of data acquisition analysis appearance 5, constant voltage power supply 7 is located exciting arrangement 1's lower extreme.
Illustrating the effect of the shell rotating device 4 and the excitation device 1, in this embodiment, preferably, the outer surface of the shell rotating device 4 is installed with a cylindrical shell, the shell rotating device 4 is used for driving the cylindrical shell to rotate, and the excitation device 1 is used for exciting the cylindrical shell to make it generate steady-state vibration.
The effects of the laser vibration meter 2 and the laser vibration meter translation device 3 are expressed, in the embodiment, preferably, the laser vibration meter 2 is used for emitting laser beams, and the laser vibration meter 2 is moved through the laser vibration meter translation device 3 to carry out omnibearing laser scanning on the cylindrical shell on the outer surface of the shell rotating device 4.
The connection between the electronic components inside the device is further explained, the whole component cooperation work of being convenient for, in this embodiment, preferably, constant voltage power supply 7 and excitation device 1 electric connection, constant voltage power supply 7 and 4 electric connections of casing rotary device, constant voltage power supply 7 and 2 electric connections of laser vibrometer, 2 electric connections of laser vibrometer and data acquisition and analysis appearance 5, data acquisition and analysis appearance 5 and 6 electric connections of microprocessor.
Describing the role of the data acquisition and analysis instrument 5, in this embodiment, the data acquisition and analysis instrument 5 is preferably used for acquiring and recording the vibration response signal of the cylindrical shell in real time and transmitting the vibration response signal to the microprocessor 6.
Describing the function of the microprocessor 6, in the embodiment, the microprocessor 6 is preferably used for analyzing and calculating the vibration response signal of the cylindrical shell, and finally drawing the pseudo-mode shape of the cylindrical shell.
The working principle and the using process of the invention are as follows: the device comprises an excitation device 1, a laser vibration meter 2, a laser vibration meter translation device 3, a shell rotating device 4, a data acquisition analyzer 5, a microprocessor 6, a voltage-stabilized power supply 7 and the like, wherein finite element analysis is carried out on a cylindrical shell on the microprocessor 6 to obtain each order natural frequency of the cylindrical shell, and a sweep frequency range of sweep frequency excitation is determined according to each order natural frequency of the cylindrical shell; starting the laser vibration meter 2, and projecting a laser beam to any point on the outer wall of the cylindrical shell; simultaneously starting the excitation device 1 to perform coarse scanning on the cylindrical shell to obtain coarse scanning values of the natural frequency of each order of the cylindrical shell and modal damping ratios of each order of the cylindrical shell; setting a rough scanning frequency sweeping speed, and exciting the steady-state vibration of the cylindrical shell within a frequency sweeping frequency range; the laser vibration meter 2 collects vibration response signals of the cylindrical shell in real time and sends the vibration response signals to the data acquisition analyzer 5; the data acquisition analyzer 5 acquires and records vibration response signals of each measuring point of the cylindrical shell in real time and transmits the vibration response signals to the microprocessor 6; according to the vibration response signal of each measuring point of the cylindrical shell, the microprocessor 6 obtains the coarse sweeping value of each order of natural frequency of the cylindrical shell and the modal damping ratio of each order of the cylindrical shell; according to the coarse scanning value of each stage of natural frequency of the cylindrical shell, the microprocessor 6 divides a new frequency scanning frequency range and performs fine scanning on the cylindrical shell; in the scanning process, the laser beam projection point position can be movably replaced through the laser vibration meter translation device 3, the fine scanning frequency sweeping speed is set in the excitation device 1, the fine scanning frequency sweeping speed is smaller than the maximum frequency sweeping speed, and the cylindrical shell is excited to vibrate in a stable state within each new frequency sweeping frequency range; the laser vibration meter 2 collects a new cylindrical shell vibration response signal in real time and sends the new cylindrical shell vibration response signal to the data acquisition analyzer 5; the data acquisition analyzer 5 acquires and records new vibration response signals of each measuring point of the cylindrical shell in real time and transmits the new vibration response signals to the microprocessor 6; according to the new vibration response signal of each measuring point of the cylindrical shell, the micro-processor 6 identifies the fine scanning value of each stage of natural frequency of the cylindrical shell; setting an excitation amplitude in an excitation device 1, and exciting the same position of the outer wall of the cylindrical shell by the excitation device 1 according to each order of natural frequency fine scanning value of the cylindrical shell and any frequency value of a non-resonance region corresponding to each order of natural frequency fine scanning value; the laser vibration meter 2 respectively obtains vibration response signals for exciting the cylindrical shell by using the natural frequency of each step of the cylindrical shell and vibration response signals for exciting the cylindrical shell by using any frequency value of a non-resonance region corresponding to the fine scanning value of each step of the natural frequency, and transmits the vibration response signals to the microprocessor 6 in real time through the data acquisition analyzer 5; after the frequency spectrum analysis, the microprocessor 6 respectively obtains the vibration response amplitude corresponding to the excitation of the cylindrical shell by each order of natural frequency of the cylindrical shell and the vibration response amplitude corresponding to the excitation of the cylindrical shell by any frequency value of the non-resonance region corresponding to each order of natural frequency; the micro-processor 6 compares the vibration response amplitude corresponding to the excitation of the cylindrical shell by each order of natural frequency of the cylindrical shell with the vibration response amplitude corresponding to the excitation of the cylindrical shell by any frequency value of a non-resonance region corresponding to each order of natural frequency respectively, and judges whether the cylindrical shell is in a resonance state according to the judgment standard of the resonance state amplitude of the cylindrical shell; if not, repeating the operation, and if so, exciting the cylindrical shell to vibrate by the excitation device 1 according to the corresponding excitation amplitude and the corresponding natural frequency of each step of the cylindrical shell when the cylindrical shell is in the resonance state; starting from any initial position of the outer wall of the cylindrical shell, the laser vibration meter translation device 3 drives a laser beam projection point position, namely the laser beam finishes scanning of a section of circular arc outer wall of the cylindrical shell corresponding to the angle, so that the laser vibration meter 2 obtains a vibration response signal of a measuring point of the section of circular arc outer wall of the cylindrical shell and transmits the vibration response signal to the microprocessor 6 in real time through the data acquisition analyzer 5; the microprocessor 6 obtains the phase of the vibration response signal of the measuring point on the outer wall of a section of circular arc of the cylindrical shell, calculates the phase difference of each adjacent measuring point, judges whether the cylindrical shell is in a phase resonance state or not according to each phase difference, and if each phase difference is close to 0 degree or 180 degrees, the cylindrical shell is in the phase resonance state; the laser vibration meter translation device 3 drives the laser vibration meter 2 to rotate for a circle to complete laser scanning for a circle; the laser vibration meter 2 obtains vibration response signals of a circumferential measuring point on the outer wall of the cylindrical shell and transmits the vibration response signals to the microprocessor 6 in real time through the data acquisition analyzer 5; the laser vibration meter translation device 3 drives the laser vibration meter 2 to complete multi-cycle laser scanning along the central axis of the inner cavity of the cylindrical shell; the laser vibration meter 2 obtains vibration response signals of a plurality of circumferential measuring points on the outer wall of the cylindrical shell and transmits the vibration response signals to the microprocessor 6 in real time through the data acquisition analyzer 5; according to the vibration response data of the measuring point on the outer wall of the cylindrical shell, the microprocessor 6 draws the modal shape of each order of the cylindrical shell; the micro processor 6 carries out time domain response signal denoising processing and windowing processing on the vibration response data of a circumferential measuring point on the outer wall of the cylindrical shell and the vibration response data of a plurality of circumferential measuring points on the outer wall of the cylindrical shell, and the micro processor 6 carries out reduction extraction processing on the vibration response signal on the data subjected to the time domain response signal denoising processing; drawing a wire frame model of the measuring points after the cylindrical shell is reduced and extracted by the microprocessor 6 according to the size parameters of the cylindrical shell and the number of the measuring points obtained after the reduction and extraction; the micro-processor 6 loads vibration response data after reduction processing under certain order resonance excitation to the coordinate values of the measuring points of the wire frame model corresponding to the vibration response data, and draws the modal vibration modes of the orders, and the testing devices including the excitation device 1, the laser vibration meter 2, the laser vibration meter translation device 3, the shell rotation device 4, the data acquisition analyzer 5, the micro-processor 6 and the like are utilized to measure the modal vibration modes, the natural frequency, the damping and other characteristic parameters of the cylindrical shell vibration under any boundary conditions, so that the acoustic pressure or the acoustic power can be directly measured through experiments or the acoustic pressure or the acoustic power generated by the cylindrical shell vibration can be indirectly calculated through measuring the shell vibration speed, and the micro-processor has a certain application prospect.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a cylinder shell modal vibration acoustic radiation testing arrangement based on laser scanning, includes excitation device (1), laser vibrometer (2), laser vibrometer translation device (3), casing rotary device (4), data acquisition analysis appearance (5), microprocessor (6) and constant voltage power supply (7), its characterized in that: the shell rotating device (4) is located at the upper end of the exciting device (1), the laser vibration meter (2) is located above the shell rotating device (4), the laser vibration meter translation device (3) is located at the rear end of the laser vibration meter (2), the data acquisition analyzer (5) is located on one side of the laser vibration meter (2), the micro processor (6) is located on one side of the data acquisition analyzer (5), and the stabilized voltage power supply (7) is located at the lower end of the exciting device (1).
2. The device for testing the modal vibration sound radiation of the cylindrical shell based on the laser scanning as claimed in claim 1, wherein: the outer surface of the shell rotating device (4) is provided with a cylindrical shell, the shell rotating device (4) is used for driving the cylindrical shell to rotate, and the exciting device (1) is used for exciting the cylindrical shell to generate stable vibration.
3. The device for testing the modal vibration sound radiation of the cylindrical shell based on the laser scanning as claimed in claim 1, wherein: the laser vibration meter (2) is used for emitting laser beams, and the laser vibration meter (2) is moved through the laser vibration meter translation device (3) to carry out all-dimensional laser scanning on the cylindrical shell on the outer surface of the shell rotating device (4).
4. The device for testing the modal vibration sound radiation of the cylindrical shell based on the laser scanning as claimed in claim 1, wherein: the device is characterized in that the stabilized voltage power supply (7) is electrically connected with the excitation device (1), the stabilized voltage power supply (7) is electrically connected with the shell rotating device (4), the stabilized voltage power supply (7) is electrically connected with the laser vibration meter (2), the laser vibration meter (2) is electrically connected with the data acquisition analyzer (5), and the data acquisition analyzer (5) is electrically connected with the micro processor (6).
5. The device for testing the modal vibration sound radiation of the cylindrical shell based on the laser scanning as claimed in claim 1, wherein: the data acquisition analyzer (5) is used for acquiring and recording vibration response signals of the cylindrical shell in real time and transmitting the vibration response signals to the microprocessor (6).
6. The device for testing the modal vibration sound radiation of the cylindrical shell based on the laser scanning as claimed in claim 1, wherein: and the microprocessor (6) is used for analyzing and calculating the vibration response signal of the cylindrical shell and finally drawing the vibration mode of the cylindrical shell.
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| CN201911267913.9A CN110907109A (en) | 2019-12-11 | 2019-12-11 | Cylindrical shell modal vibration sound radiation testing device based on laser scanning |
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| CN201911267913.9A CN110907109A (en) | 2019-12-11 | 2019-12-11 | Cylindrical shell modal vibration sound radiation testing device based on laser scanning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686489A (en) * | 2021-08-25 | 2021-11-23 | 西安航天精密机电研究所 | Detection device and method for mass unbalance defect of hemispherical harmonic oscillator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528667A (en) * | 2013-10-23 | 2014-01-22 | 东北大学 | Laser scanning based cylindrical shell modal shape testing device and method |
| CN104457608A (en) * | 2013-09-16 | 2015-03-25 | 上海航天精密机械研究所 | Cylinder size error detection system |
| CN106054158A (en) * | 2016-08-09 | 2016-10-26 | 北方民族大学 | Detection Raman laser radar light path system |
| CN106767418A (en) * | 2017-01-13 | 2017-05-31 | 大连理工大学 | A kind of large revolving body profile scanning and measuring apparatus and method |
-
2019
- 2019-12-11 CN CN201911267913.9A patent/CN110907109A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457608A (en) * | 2013-09-16 | 2015-03-25 | 上海航天精密机械研究所 | Cylinder size error detection system |
| CN103528667A (en) * | 2013-10-23 | 2014-01-22 | 东北大学 | Laser scanning based cylindrical shell modal shape testing device and method |
| CN106054158A (en) * | 2016-08-09 | 2016-10-26 | 北方民族大学 | Detection Raman laser radar light path system |
| CN106767418A (en) * | 2017-01-13 | 2017-05-31 | 大连理工大学 | A kind of large revolving body profile scanning and measuring apparatus and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686489A (en) * | 2021-08-25 | 2021-11-23 | 西安航天精密机电研究所 | Detection device and method for mass unbalance defect of hemispherical harmonic oscillator |
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