WO2023198219A1 - Multi-frequency band synchronous amplification adjustable vibration amplification apparatus - Google Patents

Multi-frequency band synchronous amplification adjustable vibration amplification apparatus Download PDF

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Publication number
WO2023198219A1
WO2023198219A1 PCT/CN2023/091043 CN2023091043W WO2023198219A1 WO 2023198219 A1 WO2023198219 A1 WO 2023198219A1 CN 2023091043 W CN2023091043 W CN 2023091043W WO 2023198219 A1 WO2023198219 A1 WO 2023198219A1
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WIPO (PCT)
Prior art keywords
frequency
vibration
low
amplification
concave ring
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PCT/CN2023/091043
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French (fr)
Chinese (zh)
Inventor
秦晓猛
赵威
胡鑫
宁薇薇
张璇
林淡
呼东亮
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天津航天瑞莱科技有限公司
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Publication of WO2023198219A1 publication Critical patent/WO2023198219A1/en

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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
    • G01M7/022—Vibration control arrangements, e.g. for generating random vibrations

Definitions

  • the present invention relates to a vibration amplification device, more specifically to a vibration amplification device with multi-band synchronous amplification and adjustable adjustment, and belongs to the technical field of mechanical testing.
  • an amplification device is usually designed to implement large-scale vibration tests through laboratory equipment.
  • the current vibration amplification is mainly based on resonance amplification.
  • Most of the vibration amplification is based on a single condition, and it is concentrated on single peak amplification. It is not fully adapted to the current increasingly demanding vibration assessment requirements.
  • some large-scale vibrations not only have power below 1000Hz.
  • the spectral density value is very large, and there are also higher power spectral density requirements at 1000Hz and 2000Hz. Therefore, a more efficient vibration amplification system is urgently needed to achieve vibration amplification.
  • the purpose of the present invention is to provide a vibration amplification device with adjustable multi-band synchronous amplification in order to solve the above-mentioned problems existing in the prior art.
  • a multi-frequency synchronous amplification and adjustable vibration amplification device including a vibrating table, a high-frequency resonant concave ring, a low-frequency resonant plate and a double-headed screw.
  • the high-frequency resonance The concave ring is located above the vibrating table of the vibrating table.
  • a central base is provided between the bottom middle of the high-frequency resonant concave ring and the vibrating table.
  • a support column is provided between the bottom edge of the high-frequency resonating concave ring and the vibrating table.
  • the high-frequency resonant concave The ring is rigidly connected and fixed on the vibrating table through the support column.
  • the low-frequency resonance plate is fixed on the top of the high-frequency resonance concave ring.
  • the double-headed screw passes through the center of the low-frequency resonance plate.
  • the lower part of the double-headed screw has a The lower spring, the upper part of the double-headed screw is penetrated from bottom to top with an upper spring and a compression nut, and the bottom of the double-headed screw passes through the high-frequency resonant concave ring and is fixed on the center base, and a control sensor is pasted on the top of the low-frequency resonant plate.
  • a monitoring sensor is pasted on the top of the vibrating table.
  • the ratio of the distance L between the center of the support column and the center of the high-frequency resonant concave ring and the radius R of the high-frequency resonant concave ring is 2:3.
  • the diameter of the high-frequency resonant concave ring is 420mm and the thickness is 20mm.
  • the diameter of the low-frequency resonance plate is 380mm and the thickness is 10mm.
  • the high-frequency resonant concave ring is rigidly connected and fixed on the vibrating table table through the high-frequency resonant concave ring fixing screws passing through the support column.
  • the low-frequency resonance plate is rigidly connected to the high-frequency resonance concave ring through the low-frequency resonance plate fixing thread.
  • the center base is rigidly connected to the vibrating table surface through the center base fixing screw.
  • This vibration amplification device can achieve multi-band synchronous amplification to meet more demanding vibration test assessments; and can effectively increase the vibration test level; at the same time, it is easy to adjust and use, and can greatly expand the capability range of the current vibration table, which is conducive to a wide range of production Application has great significance in production practice.
  • Figure 1 is a schematic structural diagram of the present invention.
  • Figure 2 is a cross-sectional view of the present invention.
  • Figure 3 is a schematic diagram of large-scale vibration control in the present invention.
  • Figure 4 is a schematic diagram of the frequency sweep transfer rate of the medium and low frequency resonant plate (without tightening the nut) of the present invention.
  • Figure 5 is a schematic diagram of the frequency sweep transfer rate of the medium and low frequency resonant plate (compression nut) of the present invention.
  • vibration table table 1 high-frequency resonant concave ring 2, low-frequency resonant plate fixing thread 3, low-frequency resonant plate 4, lower spring 5, upper spring 6, double-headed screw 7, compression nut 8, test piece 9, control Sensor 10, monitoring sensor 11, high-frequency resonance concave ring fixing screw 12, support column 13, center base 14, center base fixing screw 15, vibration table 16.
  • a multi-band synchronous amplification and adjustable vibration amplification device is mainly used for the assessment of high-level vibration tests on the test piece 9; it includes a vibration table 16, a high-frequency resonant concave ring 2, a low-frequency resonance Plate 4 and stud screw.
  • the high-frequency resonant concave ring 2 is located above the vibrating table top 1 of the vibrating table 16.
  • a center base 14 is provided between the bottom middle of the high-frequency resonating concave ring 2 and the vibrating table top 1; the bottom edge of the high-frequency resonating concave ring 2 is connected to the vibrating table top 1.
  • Support columns 13 are provided between the vibrating table tops 1, and the high-frequency resonant concave ring 2 is rigidly connected and fixed to the vibrating table top 1 through the supporting columns 13.
  • the low-frequency resonant plate 4 is fixed on the top of the high-frequency resonant concave ring 2.
  • the double-headed screw 7 passes through the center of the low-frequency resonant plate 4.
  • the low-frequency resonant plate 4 is used as the interface, and the lower part of the double-headed screw 7 is inserted through the center of the low-frequency resonant plate 4.
  • a flexible connection is formed through the compression nut 8; and the bottom of the double-headed screw 7 passes through the high-frequency resonant concave ring 2 and is threaded Fixed on the central base 14.
  • a control sensor 10 is pasted on the top of the low-frequency resonant plate 4, and a monitoring sensor 11 is pasted on the top of the vibrating table top 1.
  • the ratio of the distance L between the center of the support column 13 and the center of the high-frequency resonant concave ring 2 and the radius R of the high-frequency resonant concave ring 2 is 2:3.
  • the diameter of the high-frequency resonant concave ring 2 is 420mm and the thickness is 20mm.
  • the diameter of the low-frequency resonance plate 4 is 380mm and the thickness is 10mm.
  • the high-frequency resonant concave ring 2 is rigidly connected and fixed to the vibrating table top 1 through the high-frequency resonant concave ring fixing screws 12 passing through the support columns 13.
  • the low-frequency resonance plate 4 is rigidly connected to the high-frequency resonance concave ring 2 through the low-frequency resonance plate fixing thread 3.
  • the center base 14 is rigidly connected to the vibration table top 1 through the center base fixing screws 15.
  • this device is a vibration amplification system based on structural characteristics.
  • the entire device adopts a circular design to ensure the balance of the vibration amplification system.
  • This vibration amplification device includes a high-frequency amplification adjustment mechanism and a low-frequency amplification adjustment mechanism.
  • the measurement control system through the response transfer design, first amplifies the magnitude of the high-frequency vibration segment, and then transfers it to the low-frequency resonance amplification board, and adjusts the frequency and amplitude of the low-frequency resonance amplification through the spring mechanism.
  • This vibration amplification device includes a high-frequency amplification adjustment mechanism and a low-frequency amplification adjustment mechanism.
  • the high-frequency resonant concave ring 2, the high-frequency resonant concave ring fixing screw 12 and the support column 13 form a high-frequency amplification mechanism.
  • the support column 13 is far away from the high-frequency resonant concave
  • the stiffness of the supporting low-frequency resonant plate 4 is increased, and the frequency of high-frequency amplification is also increased accordingly.
  • the low-frequency resonant plate 4, lower spring 5, upper spring 6, double-headed screw 7, compression nut 8, center base 14 and center base fixing screw 15 form a low-frequency amplification adjustment mechanism.
  • the double-headed screw 7 passes through the low-frequency resonant plate 4 and is flexibly connected through the lower spring 5 and the upper spring 6.
  • the modal parameters of the low-frequency resonant plate 4 are changed, and the corresponding low-frequency amplification frequency and amplitude will also change accordingly; the lower end of the double-headed screw 7 is screwed into the center base 14, and passes through the center base
  • the screw 15 fixes the bottom of the entire low-frequency adjustment structure, making it easier to adjust the low-frequency amplification parameters by tightening the nut 8 .
  • the control sensor 10 and the monitoring sensor 11 constitute a measurement control system.
  • the test piece 9 is installed on the low-frequency resonance plate 4.
  • the high-frequency resonance concave ring 2 is excited by the vibration table 1 and generates high-frequency amplification based on the cantilever outer drum structure; the low-frequency resonance plate 4 is used as the test piece.
  • the low-frequency resonant plate 4 generates low-frequency amplification based on the inner drum structure;
  • the control sensor 10 and the monitoring sensor 11 are used to control the vibration test and monitor the capability of the vibration table 16, and the control sensor 10 is used for vibration test control.
  • the monitoring sensor 11 is used for monitoring the response of the vibrating table top 1 .
  • the energy of the excitation source device comes from the vibration excitation of the vibration table 16.
  • the vibration test controller and the sensor measurement system it is also necessary to match the vibration test controller and the sensor measurement system; at the same time, the characteristics and test conditions of the test piece 9 vary widely.
  • the spacing of the supporting high-frequency resonant concave ring 2 can be correspondingly adjusted or the high-frequency resonant concave ring 2 with no thickness can be designed; on the other hand, when the spring adjustment mechanism cannot meet the needs of low-frequency amplification, a low-frequency resonant concave ring 2 can also be designed.
  • the thickness of the resonant ring 4 changes its corresponding low-frequency amplification parameters.
  • this amplification device realizes simultaneous amplification of low frequency and high frequency based on structural characteristics, which can break through the capacity limit of the vibration table 16, reach extremely high vibration levels, effectively amplify low frequency and high frequency vibration test levels at the same time, and achieve different frequency bands.
  • Vibration level amplification meets high-level test requirements under different conditions, and is actually used in the test field to provide reliable test quality assurance and data support for high-level vibration tests on test piece 9; and this device can be used in aviation, It is required for high-level vibration testing near power sources such as aerospace and weapons or in other fields. It has the characteristics of easy adjustment and stable control.
  • the device has resonance amplification characteristics in the range of 600Hz to 900Hz, and in the high frequency band above 1400Hz; at the same time, by comparing Figure 4, it can be seen that the resonance amplification frequency in the low frequency band has shifted backward, indicating that the invention
  • the device can adjust the resonance amplification frequency band to be suitable for high-level vibration tests under different conditions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

A multi-frequency band synchronous amplification adjustable vibration amplification apparatus comprising a vibration table (16), a high-frequency resonance recessed ring (2), a low-frequency resonance plate (4), and a double-ended screw (7); a center base (14) is disposed between the middle of the bottom portion of the high-frequency resonance recessed ring (2) and the vibration table top (1); a supporting column (13) is arranged between the bottom edge of the high-frequency resonance recessed ring (2) and the vibration table top (1); the low-frequency resonance plate (4) is fixed to the top of the high-frequency resonance recessed ring (2); the double-ended screw (7) penetrates through the center of the low-frequency resonance plate (4), a lower spring (5) penetrates through the lower portion of the double-ended screw (7), and an upper spring (6) and a tightening nut (8) penetrate from bottom to top through the upper portion of the double-ended screw (7); a control sensor (10) is adhered to the top of the low-frequency resonance plate (4), and a monitoring sensor (11) is adhered to the vibration table top (1). The vibration amplification apparatus enables multi-frequency band synchronous amplification, satisfying harsher vibration test assessment.

Description

一种多频段同步放大可调的振动放大装置A multi-band synchronous amplification and adjustable vibration amplification device 技术领域Technical field
本发明涉及一种振动放大装置，更具体的说涉及一种多频段同步放大可调的振动放大装置，属于力学试验技术领域。The present invention relates to a vibration amplification device, more specifically to a vibration amplification device with multi-band synchronous amplification and adjustable adjustment, and belongs to the technical field of mechanical testing.
背景技术Background technique
目前，随着航天、航空和其他科技技术的不断发展，产品在运用过程中所处的力学环境日益严苛复杂，如新型战机、超重吨位运载火箭、高速突防导弹和一些靠近动力源位置的部件等都存在大量级的振动或冲击环境。零部件能否适应苛刻的振动环境，需要通过振动试验对关键零部件进行验证。但是，由于这类振动的量级极大，甚至有超过100Grms的振动量级，受制于设备能力限制，依靠现有的设备很难实现；若对试验件采用近场试验，则验证次数较多、成本高昂，难以实现。At present, with the continuous development of aerospace, aviation and other science and technology, the mechanical environment in which products are used is becoming increasingly harsh and complex, such as new fighter aircraft, super-heavy tonnage launch vehicles, high-speed penetration missiles and some missiles close to the power source. Components, etc. are exposed to large-scale vibration or shock environments. Whether components can adapt to harsh vibration environments requires verification of key components through vibration tests. However, due to the extremely high magnitude of this type of vibration, which even exceeds 100Grms, it is difficult to achieve this with existing equipment due to limitations in equipment capabilities. If the test piece is tested using near-field testing, the number of verifications will be greater. , high cost and difficult to achieve.
基于上述情况，为了实现大量级的振动考核，通常设计一种放大装置通过试验室设备来实现大量级的振动试验。但是，当前振动放大主要基于谐振放大，针对单一条件进行振动放大居多，且集中于单峰放大，并未完全适应于当前越来越苛刻的振动考核要求，如部分大量级振动不仅1000Hz以下的功率谱密度值很大，在1000Hz在2000Hz也有较高的功率谱密度要求，因此亟需一套更加高效的振动放大系统来实现振动放大。Based on the above situation, in order to achieve large-scale vibration assessment, an amplification device is usually designed to implement large-scale vibration tests through laboratory equipment. However, the current vibration amplification is mainly based on resonance amplification. Most of the vibration amplification is based on a single condition, and it is concentrated on single peak amplification. It is not fully adapted to the current increasingly demanding vibration assessment requirements. For example, some large-scale vibrations not only have power below 1000Hz. The spectral density value is very large, and there are also higher power spectral density requirements at 1000Hz and 2000Hz. Therefore, a more efficient vibration amplification system is urgently needed to achieve vibration amplification.
发明内容Contents of the invention
本发明的目的在于针对现有技术中存在的上述问题，提供一种多频段同步放大可调的振动放大装置。The purpose of the present invention is to provide a vibration amplification device with adjustable multi-band synchronous amplification in order to solve the above-mentioned problems existing in the prior art.
为实现上述目的，本发明的技术解决方案是：一种多频段同步放大可调的振动放大装置，包括振动台、高频谐振凹环、低频谐振板和双头螺杆，所述的高频谐振凹环位于振动台的振动台台面上方，高频谐振凹环底中部与振动台台面之间设置有中心底座，高频谐振凹环底边缘与振动台台面之间设置支撑柱，高频谐振凹环通过支撑柱刚性连接固定于振动台台面上，所述的低频谐振板固定在高频谐振凹环顶部，所述的双头螺杆穿置过低频谐振板的中心，双头螺杆下部穿置有下弹簧，双头螺杆上部由下至上穿置有上弹簧和压紧螺母，且双头螺杆底部穿过高频谐振凹环定于中心底座上，所述的低频谐振板顶部粘贴有控制传感器，所述的振动台台面顶部粘贴有监测传感器。In order to achieve the above purpose, the technical solution of the present invention is: a multi-frequency synchronous amplification and adjustable vibration amplification device, including a vibrating table, a high-frequency resonant concave ring, a low-frequency resonant plate and a double-headed screw. The high-frequency resonance The concave ring is located above the vibrating table of the vibrating table. A central base is provided between the bottom middle of the high-frequency resonant concave ring and the vibrating table. A support column is provided between the bottom edge of the high-frequency resonating concave ring and the vibrating table. The high-frequency resonant concave The ring is rigidly connected and fixed on the vibrating table through the support column. The low-frequency resonance plate is fixed on the top of the high-frequency resonance concave ring. The double-headed screw passes through the center of the low-frequency resonance plate. The lower part of the double-headed screw has a The lower spring, the upper part of the double-headed screw is penetrated from bottom to top with an upper spring and a compression nut, and the bottom of the double-headed screw passes through the high-frequency resonant concave ring and is fixed on the center base, and a control sensor is pasted on the top of the low-frequency resonant plate. A monitoring sensor is pasted on the top of the vibrating table.
所述的支撑柱中心距离高频谐振凹环中心的距离L与高频谐振凹环的半径R之比为2：3。The ratio of the distance L between the center of the support column and the center of the high-frequency resonant concave ring and the radius R of the high-frequency resonant concave ring is 2:3.
所述的高频谐振凹环的直径为420mm、厚度为20mm。The diameter of the high-frequency resonant concave ring is 420mm and the thickness is 20mm.
所述的低频谐振板的直径为380mm、厚度为10mm。 The diameter of the low-frequency resonance plate is 380mm and the thickness is 10mm.
所述的高频谐振凹环通过高频谐振凹环固定螺钉穿过支撑柱刚性连接固定于振动台台面上。The high-frequency resonant concave ring is rigidly connected and fixed on the vibrating table table through the high-frequency resonant concave ring fixing screws passing through the support column.
所述的低频谐振板通过低频谐振板固定螺纹与高频谐振凹环刚性连接。The low-frequency resonance plate is rigidly connected to the high-frequency resonance concave ring through the low-frequency resonance plate fixing thread.
所述的中心底座通过中心底座固定螺钉刚性连接于振动台台面上。The center base is rigidly connected to the vibrating table surface through the center base fixing screw.
与现有技术相比较，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本振动放大装置能够实现多频段同步放大，满足更加苛刻的振动试验考核；且能有效提高振动试验量级；同时便于调节，使用方便，能够大大扩充当前振动台的能力范围，有利于广泛的生产应用，具有重大的生产实践意义。This vibration amplification device can achieve multi-band synchronous amplification to meet more demanding vibration test assessments; and can effectively increase the vibration test level; at the same time, it is easy to adjust and use, and can greatly expand the capability range of the current vibration table, which is conducive to a wide range of production Application has great significance in production practice.
附图说明Description of the drawings
图1是本发明结构示意图。Figure 1 is a schematic structural diagram of the present invention.
图2是本发明剖视图。Figure 2 is a cross-sectional view of the present invention.
图3是本发明中大量级振动控制示意图。Figure 3 is a schematic diagram of large-scale vibration control in the present invention.
图4是本发明中低频谐振板(未压紧螺母)扫频传递率示意图。Figure 4 is a schematic diagram of the frequency sweep transfer rate of the medium and low frequency resonant plate (without tightening the nut) of the present invention.
图5是本发明中低频谐振板(压紧螺母)扫频传递率示意图。Figure 5 is a schematic diagram of the frequency sweep transfer rate of the medium and low frequency resonant plate (compression nut) of the present invention.
图中：振动台台面1，高频谐振凹环2，低频谐振板固定螺纹3，低频谐振板4，下弹簧5，上弹簧6，双头螺杆7，压紧螺母8，试验件9，控制传感器10，监测传感器11，高频谐振凹环固定螺钉12，支撑柱13，中心底座14，中心底座固定螺钉15，振动台16。In the picture: vibration table table 1, high-frequency resonant concave ring 2, low-frequency resonant plate fixing thread 3, low-frequency resonant plate 4, lower spring 5, upper spring 6, double-headed screw 7, compression nut 8, test piece 9, control Sensor 10, monitoring sensor 11, high-frequency resonance concave ring fixing screw 12, support column 13, center base 14, center base fixing screw 15, vibration table 16.
具体实施方式Detailed ways
以下结合附图说明和具体实施方式对本发明作进一步的详细描述。The present invention will be described in further detail below in conjunction with the description of the drawings and specific embodiments.
参见图1至图2，一种多频段同步放大可调的振动放大装置，主要用于对试验件9进行高量级振动试验的考核；包括振动台16、高频谐振凹环2、低频谐振板4和双头螺杆。所述的高频谐振凹环2位于振动台16的振动台台面1上方，高频谐振凹环2底中部与振动台台面1之间设置有中心底座14；高频谐振凹环2底边缘与振动台台面1之间设置支撑柱13，高频谐振凹环2通过支撑柱13刚性连接固定于振动台台面1上。所述的低频谐振板4固定在高频谐振凹环2顶部，所述的双头螺杆7穿置过低频谐振板4的中心，以低频谐振板4为分界面，双头螺杆7下部穿置有下弹簧5，双头螺杆7上部由下至上穿置有上弹簧6和压紧螺母8，通过压紧螺母8形成柔性连接；且双头螺杆7底部穿过高频谐振凹环2通过螺纹固定于中心底座14上。所述的低频谐振板4顶部粘贴有控制传感器10，所述的振动台台面1顶部粘贴有监测传感器11。Referring to Figures 1 to 2, a multi-band synchronous amplification and adjustable vibration amplification device is mainly used for the assessment of high-level vibration tests on the test piece 9; it includes a vibration table 16, a high-frequency resonant concave ring 2, a low-frequency resonance Plate 4 and stud screw. The high-frequency resonant concave ring 2 is located above the vibrating table top 1 of the vibrating table 16. A center base 14 is provided between the bottom middle of the high-frequency resonating concave ring 2 and the vibrating table top 1; the bottom edge of the high-frequency resonating concave ring 2 is connected to the vibrating table top 1. Support columns 13 are provided between the vibrating table tops 1, and the high-frequency resonant concave ring 2 is rigidly connected and fixed to the vibrating table top 1 through the supporting columns 13. The low-frequency resonant plate 4 is fixed on the top of the high-frequency resonant concave ring 2. The double-headed screw 7 passes through the center of the low-frequency resonant plate 4. The low-frequency resonant plate 4 is used as the interface, and the lower part of the double-headed screw 7 is inserted through the center of the low-frequency resonant plate 4. There is a lower spring 5, and an upper spring 6 and a compression nut 8 are inserted through the upper part of the double-headed screw 7 from bottom to top. A flexible connection is formed through the compression nut 8; and the bottom of the double-headed screw 7 passes through the high-frequency resonant concave ring 2 and is threaded Fixed on the central base 14. A control sensor 10 is pasted on the top of the low-frequency resonant plate 4, and a monitoring sensor 11 is pasted on the top of the vibrating table top 1.
参见图1至图2，具体的，所述的支撑柱13中心距离高频谐振凹环2中心的距离L与高频谐振凹环2的半径R之比为2：3。 Referring to Figures 1 to 2, specifically, the ratio of the distance L between the center of the support column 13 and the center of the high-frequency resonant concave ring 2 and the radius R of the high-frequency resonant concave ring 2 is 2:3.
参见图1至图2，具体的，所述的高频谐振凹环2的直径为420mm、厚度为20mm。Referring to Figures 1 to 2, specifically, the diameter of the high-frequency resonant concave ring 2 is 420mm and the thickness is 20mm.
参见图1至图2，具体的，所述的低频谐振板4的直径为380mm、厚度为10mm。Referring to Figures 1 to 2, specifically, the diameter of the low-frequency resonance plate 4 is 380mm and the thickness is 10mm.
参见图1至图2，具体的，所述的高频谐振凹环2通过高频谐振凹环固定螺钉12穿过支撑柱13刚性连接固定于振动台台面1上。Referring to Figures 1 to 2, specifically, the high-frequency resonant concave ring 2 is rigidly connected and fixed to the vibrating table top 1 through the high-frequency resonant concave ring fixing screws 12 passing through the support columns 13.
参见图1至图2，具体的，所述的低频谐振板4通过低频谐振板固定螺纹3与高频谐振凹环2刚性连接。Referring to Figures 1 to 2, specifically, the low-frequency resonance plate 4 is rigidly connected to the high-frequency resonance concave ring 2 through the low-frequency resonance plate fixing thread 3.
参见图1至图2，具体的，所述的中心底座14通过中心底座固定螺钉15刚性连接于振动台台面1上。Referring to Figures 1 to 2, specifically, the center base 14 is rigidly connected to the vibration table top 1 through the center base fixing screws 15.
参见图1至图2，本装置是一种基于结构特性的振动放大系统，整个装置采用圆形设计能够确保振动放大系统的均衡性，本振动放大装置包括高频放大调节机构、低频放大调节机构和测量控制系统，通过响应传递设计，先对高频振动段的量级放大，然后将其传递到低频谐振放大板上，并通过弹簧机构调整低频谐振放大的频率和幅值。本振动放大装置包括高频放大调节机构和低频放大调节机构，高频谐振凹环2、高频谐振凹环固定螺钉12和支撑柱13组成高频放大机构，当支撑柱13距离高频谐振凹环2中心的距离L接近与高频谐振凹环2的半径R时，支撑低频谐振板4的刚度提高，高频放大的频率也相应提高。低频谐振板4、下弹簧5、上弹簧6、双头螺杆7、压紧螺母8、中心底座14和中心底座固定螺钉15组成低频放大调节机构，当低频谐振板4的尺寸、厚度和材料确定后，其刚度阻尼特性参数恒定，对应的一阶频率也就确定，低频放大处的频率也相应固定；双头螺杆7穿过低频谐振板4，并通过下弹簧5和上弹簧6柔性连接，通过压紧螺母8调节预紧力，则改变低频谐振板4的模态参数，对应的低频放大频率和幅值也会相应变化；双头螺杆7的下端旋入中心底座14，并通过中心底座螺钉15将整个低频调节结构底部固定，使压紧螺母8调整低频放大参数较为容易。控制传感器10和监测传感器11构建成测量控制系统。Referring to Figures 1 to 2, this device is a vibration amplification system based on structural characteristics. The entire device adopts a circular design to ensure the balance of the vibration amplification system. This vibration amplification device includes a high-frequency amplification adjustment mechanism and a low-frequency amplification adjustment mechanism. And the measurement control system, through the response transfer design, first amplifies the magnitude of the high-frequency vibration segment, and then transfers it to the low-frequency resonance amplification board, and adjusts the frequency and amplitude of the low-frequency resonance amplification through the spring mechanism. This vibration amplification device includes a high-frequency amplification adjustment mechanism and a low-frequency amplification adjustment mechanism. The high-frequency resonant concave ring 2, the high-frequency resonant concave ring fixing screw 12 and the support column 13 form a high-frequency amplification mechanism. When the support column 13 is far away from the high-frequency resonant concave When the distance L between the centers of the ring 2 is close to the radius R of the high-frequency resonant concave ring 2, the stiffness of the supporting low-frequency resonant plate 4 is increased, and the frequency of high-frequency amplification is also increased accordingly. The low-frequency resonant plate 4, lower spring 5, upper spring 6, double-headed screw 7, compression nut 8, center base 14 and center base fixing screw 15 form a low-frequency amplification adjustment mechanism. When the size, thickness and material of the low-frequency resonant plate 4 are determined Finally, its stiffness and damping characteristic parameters are constant, the corresponding first-order frequency is determined, and the frequency at the low-frequency amplification point is also fixed accordingly; the double-headed screw 7 passes through the low-frequency resonant plate 4 and is flexibly connected through the lower spring 5 and the upper spring 6. By adjusting the pretightening force through the compression nut 8, the modal parameters of the low-frequency resonant plate 4 are changed, and the corresponding low-frequency amplification frequency and amplitude will also change accordingly; the lower end of the double-headed screw 7 is screwed into the center base 14, and passes through the center base The screw 15 fixes the bottom of the entire low-frequency adjustment structure, making it easier to adjust the low-frequency amplification parameters by tightening the nut 8 . The control sensor 10 and the monitoring sensor 11 constitute a measurement control system.
参见图1至图2，本装置安装时，首先，安装高频谐振凹环2和支撑柱13，并将中心底座14通过螺钉刚性连接固定；其次，安装双头螺杆7、下弹簧5和低频谐振板4，将低频谐振板4刚性连接于高频谐振凹环2上；接着，安装上弹簧6和压紧螺母8，将低频谐振板4中心与双头螺杆7柔性连接；接着，安装控制传感器10和监测传感器11，构建测量控制系统；然后，设置振动放大装置，调节压紧螺母8，以使得试验控制是否能够到达期望控制曲线；然后，分析曲线，若高频存在差异、重新安装调整高频谐振凹环2的支撑间距，若低频存在差异调整压紧螺母8或更换不同厚度的低频谐振板4；然后，在控制曲线满足要求的情况下，安装试验件9，并在试验件9的安装连接附近安装控制传感器10，并在振动台台面安装监测传感器11，以了解实际的放大特性；最后，启动试验，实时观察控制状态，分析附加 质量对其振动的影响，如果附加质量有影响，则需要匹配模拟件进行振动放大调试。进行振动试验时，试验件9安装在低频谐振板4上面，高频谐振凹环2在振动台台面的1的激励下，基于悬臂外鼓型结构产生高频放大；低频谐振板4作为试验件9的安装平面，低频谐振板4基于内鼓型结构产生低频放大；控制传感器10和监测传感器11用于对振动试验的控制和对振动台16的能力监测，控制传感器10用于振动试验控制，监测传感器11用于振动台台面1响应监测。需要明确的是，在本发明中，激励源装置能量来源于振动台16的振动激励，进行试验时，还需要匹配振动试验控制仪和传感器测量系统；同时，试验件9的特性和试验条件千差万别，在不能满足要求，可以对应的调整支撑高频谐振凹环2的间距或设计不用厚度的高频谐振凹环2；另一方面，在弹簧调节机构不能满足低频放大需要时，也可以设计低频谐振环4的厚度改变其对应的低频放大参数。因此，本放大装置基于结构特性实现了低频和高频同时放大，可突破振动台16的能力限制，达到极高的振动量级，有效同时放大低频和高频振动试验量级，实现不同频段的振动量级放大，满足不同条件的高量级的试验需求，并实际应用于试验领域，为试验件9的高量级振动试验提供可靠的试验质量保障和数据支撑；且本装置可用于航空、航天和兵器等动力源附近或其他领域的高量级振动试验要求，具有方便易调、控制稳定的特点。Referring to Figures 1 to 2, when installing this device, first, install the high-frequency resonant concave ring 2 and the support column 13, and rigidly connect and fix the center base 14 with screws; secondly, install the double-headed screw 7, the lower spring 5 and the low-frequency For the resonant plate 4, rigidly connect the low-frequency resonant plate 4 to the high-frequency resonant concave ring 2; then, install the spring 6 and the compression nut 8, and flexibly connect the center of the low-frequency resonant plate 4 to the double-headed screw 7; then, install the control Sensor 10 and monitoring sensor 11 construct a measurement control system; then, set up a vibration amplification device and adjust the compression nut 8 to ensure that the test control can reach the desired control curve; then, analyze the curve, and if there is a difference in high frequency, reinstall and adjust For the support spacing of the high-frequency resonant concave ring 2, if there is a difference in the low frequency, adjust the compression nut 8 or replace the low-frequency resonant plate 4 with different thicknesses; then, when the control curve meets the requirements, install the test piece 9, and install the test piece 9 on the Install the control sensor 10 near the installation connection, and install the monitoring sensor 11 on the vibrating table to understand the actual amplification characteristics; finally, start the test, observe the control status in real time, and analyze the additional The impact of mass on its vibration. If the additional mass has an impact, simulation parts need to be matched for vibration amplification debugging. During the vibration test, the test piece 9 is installed on the low-frequency resonance plate 4. The high-frequency resonance concave ring 2 is excited by the vibration table 1 and generates high-frequency amplification based on the cantilever outer drum structure; the low-frequency resonance plate 4 is used as the test piece. 9, the low-frequency resonant plate 4 generates low-frequency amplification based on the inner drum structure; the control sensor 10 and the monitoring sensor 11 are used to control the vibration test and monitor the capability of the vibration table 16, and the control sensor 10 is used for vibration test control. The monitoring sensor 11 is used for monitoring the response of the vibrating table top 1 . It should be clear that in the present invention, the energy of the excitation source device comes from the vibration excitation of the vibration table 16. When conducting the test, it is also necessary to match the vibration test controller and the sensor measurement system; at the same time, the characteristics and test conditions of the test piece 9 vary widely. , if the requirements cannot be met, the spacing of the supporting high-frequency resonant concave ring 2 can be correspondingly adjusted or the high-frequency resonant concave ring 2 with no thickness can be designed; on the other hand, when the spring adjustment mechanism cannot meet the needs of low-frequency amplification, a low-frequency resonant concave ring 2 can also be designed. The thickness of the resonant ring 4 changes its corresponding low-frequency amplification parameters. Therefore, this amplification device realizes simultaneous amplification of low frequency and high frequency based on structural characteristics, which can break through the capacity limit of the vibration table 16, reach extremely high vibration levels, effectively amplify low frequency and high frequency vibration test levels at the same time, and achieve different frequency bands. Vibration level amplification meets high-level test requirements under different conditions, and is actually used in the test field to provide reliable test quality assurance and data support for high-level vibration tests on test piece 9; and this device can be used in aviation, It is required for high-level vibration testing near power sources such as aerospace and weapons or in other fields. It has the characteristics of easy adjustment and stable control.
参见图3至图5，针对在低频段和高频段均要放大的高量级振动试验，具体参见图3，显示在低频段400Hz处、以及高频段1000Hz以上的频段实现了高量级功率谱密度振动控制，从而实现了总均方根125.4Grms的高量级振动。参见图4，该装置高量级的随机振动谐振放大源于控制点位置的响应特性覆盖试验需求，基于扫频振动，未旋紧压紧螺母状态下，本申请装置控制点位置的响应特性具体参见图4，显示在400Hz处，以及高频段1400Hz以上具有谐振放大特性，故而能轻易实现图3中的高量级振动试验。参见图5，该装置通过压紧螺母改变控制点位置的谐振响应特性，所以针对不同的试验条件，需要调节控制点位置的响应特性；基于扫频振动，旋紧压紧螺母状态下，本装置控制点的响应特性具体参见图5：在600Hz～900Hz范围，以及高频段1400Hz以上具有谐振放大特性；同时，通过对比图4可以看出，低频段的谐振放大频率出现了后移，说明该发明装置可以实现谐振放大频段的调节，以适用于不同条件的高量级振动试验。Refer to Figures 3 to 5. For high-level vibration tests that require amplification in both low-frequency and high-frequency bands, see Figure 3 for details. It shows that a high-level power spectrum is achieved at 400Hz in the low-frequency band and above 1000Hz in the high-frequency band. Density vibration control achieves a high-level vibration with a total root mean square of 125.4Grms. Referring to Figure 4, the high-level random vibration resonance amplification of this device is derived from the response characteristics of the control point position covering the test requirements. Based on the frequency sweep vibration, the response characteristics of the control point position of the device of this application are specific when the compression nut is not tightened. See Figure 4, which shows that it has resonance amplification characteristics at 400Hz and in the high frequency band above 1400Hz, so the high-level vibration test in Figure 3 can be easily realized. Referring to Figure 5, the device changes the resonance response characteristics of the control point position through the compression nut. Therefore, it is necessary to adjust the response characteristics of the control point position according to different test conditions; based on frequency sweep vibration, when the compression nut is tightened, the device The response characteristics of the control point are detailed in Figure 5: it has resonance amplification characteristics in the range of 600Hz to 900Hz, and in the high frequency band above 1400Hz; at the same time, by comparing Figure 4, it can be seen that the resonance amplification frequency in the low frequency band has shifted backward, indicating that the invention The device can adjust the resonance amplification frequency band to be suitable for high-level vibration tests under different conditions.
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，上述结构都应当视为属于本发明的保护范围。 The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be concluded that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, and the above structures should be regarded as belonging to the protection scope of the present invention.

Claims (7)

  1. 一种多频段同步放大可调的振动放大装置，其特征在于：包括振动台(16)、高频谐振凹环(2)、低频谐振板(4)和双头螺杆(7)，所述的高频谐振凹环(2)位于振动台(16)的振动台台面(1)上方，高频谐振凹环(2)底中部与振动台台面(1)之间设置有中心底座(14)，高频谐振凹环(2)底边缘与振动台台面(1)之间设置支撑柱(13)，高频谐振凹环(2)通过支撑柱(13)刚性连接固定于振动台台面(1)上，所述的低频谐振板(4)固定在高频谐振凹环(2)顶部，所述的双头螺杆(7)穿置过低频谐振板(4)的中心，双头螺杆(7)下部穿置有下弹簧(5)，双头螺杆(7)上部由下至上穿置有上弹簧(6)和压紧螺母(8)，且双头螺杆(7)底部穿过高频谐振凹环(2)定于中心底座(14)上，所述的低频谐振板(4)顶部粘贴有控制传感器(10)，所述的振动台台面(1)顶部粘贴有监测传感器(11)。A vibration amplification device with multi-band synchronous amplification and adjustable adjustment, characterized by: including a vibration table (16), a high-frequency resonant concave ring (2), a low-frequency resonant plate (4) and a double-headed screw (7). The high-frequency resonant concave ring (2) is located above the vibrating table surface (1) of the vibrating table (16). A central base (14) is provided between the bottom middle of the high-frequency resonating concave ring (2) and the vibrating table surface (1). A support column (13) is provided between the bottom edge of the high-frequency resonant concave ring (2) and the vibrating table top (1). The high-frequency resonant concave ring (2) is rigidly connected and fixed to the vibrating table top (1) through the support column (13). On the top, the low-frequency resonant plate (4) is fixed on the top of the high-frequency resonant concave ring (2), and the double-headed screw (7) passes through the center of the low-frequency resonant plate (4). The double-headed screw (7) A lower spring (5) is inserted through the lower part, an upper spring (6) and a compression nut (8) are inserted through the upper part of the double-ended screw (7) from bottom to top, and the bottom of the double-ended screw (7) passes through the high-frequency resonance recess. The ring (2) is fixed on the center base (14), a control sensor (10) is pasted on the top of the low-frequency resonance plate (4), and a monitoring sensor (11) is pasted on the top of the vibration table surface (1).
  2. 根据权利要求1所述的一种多频段同步放大可调的振动放大装置，其特征在于：所述的支撑柱(13)中心距离高频谐振凹环(2)中心的距离L与高频谐振凹环(2)的半径R之比为2：3。A multi-frequency synchronous amplification and adjustable vibration amplification device according to claim 1, characterized in that: the distance L between the center of the support column (13) and the center of the high-frequency resonance concave ring (2) is equal to the distance L between the center of the support column (13) and the center of the high-frequency resonance concave ring (2). The ratio of the radii R of the concave ring (2) is 2:3.
  3. 根据权利要求1所述的一种多频段同步放大可调的振动放大装置，其特征在于：所述的高频谐振凹环(2)的直径为420mm、厚度为20mm。A vibration amplification device with multi-band synchronous amplification and adjustable adjustment according to claim 1, characterized in that: the diameter of the high-frequency resonant concave ring (2) is 420 mm and the thickness is 20 mm.
  4. 根据权利要求1所述的一种多频段同步放大可调的振动放大装置，其特征在于：所述的低频谐振板(4)的直径为380mm、厚度为10mm。A vibration amplification device with multi-band synchronous amplification and adjustable adjustment according to claim 1, characterized in that: the diameter of the low-frequency resonance plate (4) is 380 mm and the thickness is 10 mm.
  5. 根据权利要求1所述的一种多频段同步放大可调的振动放大装置，其特征在于：所述的高频谐振凹环(2)通过高频谐振凹环固定螺钉(12)穿过支撑柱(13)刚性连接固定于振动台台面(1)上。A multi-band synchronous amplification and adjustable vibration amplification device according to claim 1, characterized in that: the high-frequency resonant concave ring (2) passes through the support column through the high-frequency resonant concave ring fixing screw (12) (13) Rigidly connected and fixed on the vibration table table (1).
  6. 根据权利要求1所述的一种多频段同步放大可调的振动放大装置，其特征在于：所述的低频谐振板(4)通过低频谐振板固定螺纹(3)与高频谐振凹环(2)刚性连接。A multi-band synchronous amplification and adjustable vibration amplification device according to claim 1, characterized in that: the low-frequency resonance plate (4) is connected to the high-frequency resonance concave ring (2) through the low-frequency resonance plate fixing thread (3) ) rigid connection.
  7. 根据权利要求1所述的一种多频段同步放大可调的振动放大装置，其特征在于：所述的中心底座(14)通过中心底座固定螺钉(15)刚性连接于振动台台面(1)上。 A multi-band synchronous amplification and adjustable vibration amplification device according to claim 1, characterized in that: the center base (14) is rigidly connected to the vibration table table (1) through the center base fixing screw (15) .
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