CN109932150B - Micro-vibration control device of towering suspension detection structure - Google Patents
Micro-vibration control device of towering suspension detection structure Download PDFInfo
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Abstract
The invention provides a micro-vibration control device of a towering suspension detection structure, which comprises: the steel rigid T-shaped platform (1) is a horizontal platform, is used for placing radar detected equipment, is used for supporting a frame counterweight and keeps balance; the limiter system comprises a class I limiter (2) and a class II limiter (4) and is used for preventing impact vibration and sudden load from separating the steel rigid T-shaped table (1) from the supporting device and improving stability, wherein the class I limiter (2) is used for limiting the relative position of the steel rigid T-shaped table (1) and the air spring in the air floatation system (3), and the class II limiter (4) is used for limiting the relative position of the supporting rigid frame upright post (5) and the air spring in the air floatation system (3); the air floating device (3) is provided with 6 air springs to ensure that the table top of the steel rigid T-shaped table (1) is stable horizontally; the building structure foundation terrace (10) is used for bearing all loads of a building and transmitting the loads to a foundation, and has the vibration resistance effect.
Description
Technical Field
The invention relates to the field of micro-vibration control of detection structures, in particular to a micro-vibration control device of a towering suspension detection structure.
Background
For a space independent detection environment, such as radar and electromagnetic shielding performance detection of similar electronic components, a high-performance micro-vibration environment needs to be provided in a closed electromagnetic wave darkroom in the space independent detection environment, and a micron-scale or sub-nanometer-scale vibration environment guarantee needs to be provided under the influence of frequent random pulsation when the electromagnetic shielding performance of the radar components in the closed electromagnetic wave darkroom is detected.
At present, radar electronic components are used for controlling micro-vibration of an electromagnetic shielding room during performance calibration detection experiments, and a large-section steel truss structure is mainly adopted and combined with an air floatation vibration isolation system arranged on a base. In the working process, the two technologies are difficult to meet the requirement of vibration reduction design, and have the following defects respectively:
(1) the vibration isolation cannot be reduced, and only the vibration isolation can be carried out. The steel truss structure is adopted, the profile steel is used as a main material to be assembled into a multi-layer frame form, a structural system and the micro-vibration environment vibration load are overlapped in a local resonance range, and the resonance phenomenon is easy to occur; the truss is high in rigidity and only can resist vibration, and vibration reduction and isolation cannot be realized; the large-mass support system has poor vibration isolation effect of the whole substrate; if the construction mode adopts once only to pour and take shape, consuming time and difficultly, if adopt the assembled, the structural flexibility is big, and the vibration isolation performance is poor.
(2) The vibration damping device is easy to generate resonance at low frequency, the vibration damping efficiency is low, and the foundation pit can not be reused. The scheme that the air floatation vibration isolation system is arranged below the supporting frame is adopted, a pit is required to be arranged below the shielding chamber, the air floatation vibration isolation system is arranged, cement is poured and formed, the engineering period is long, the pit maintenance cost is high, the pit cannot be reused after being discarded, and the environment is damaged; the natural frequency of the air floatation platform is low, so that resonance is easily generated at low frequency, and the micro-vibration control effect is limited; the air floatation vibration isolation system is provided with the high-rise structure, the bearing weight is large, the number of air springs is large, the cost is high, the rigidity of the frame structure is greatly reduced, the vibration isolation effect of the top radar electronic equipment placing area cannot meet the requirement, and the cost performance is low.
Disclosure of Invention
The invention provides a micro-vibration control device of a towering suspension detection structure, aiming at the problems that the towering suspension detection structure is influenced by the frequent random pulsation and needs to provide a micron-scale or sub-nanometer-scale vibration environment guarantee when the electromagnetic shielding performance of radar components in a closed electromagnetic wave darkroom is detected in a space independent detection environment, and the micro-vibration environment in the closed electromagnetic wave darkroom is effectively controlled by adopting a towering rigid support system, an air-floating suspension vibration isolation device and a T-shaped rigid platform integrated vibration control technology when the electromagnetic shielding performance of the radar components is detected in the space independent detection environment, so that the micron-scale or sub-nanometer-scale vibration requirement is met.
The invention aims to provide a micro-vibration control device of a towering suspension detection structure, which comprises:
the radar detection device comprises a steel rigid T-shaped platform (1), wherein the steel rigid T-shaped platform (1) is a horizontal platform and is used for placing radar detected equipment, and meanwhile, a support frame is used for balancing weight to keep balance;
the limiter system comprises a class I limiter (2) and a class II limiter (4) and is used for preventing impact vibration and sudden load from separating the steel rigid T-shaped table (1) from the supporting device and improving stability, wherein the class I limiter (2) is used for limiting the relative position of the steel rigid T-shaped table (1) and the air spring in the air floatation system (3), and the class II limiter (4) is used for limiting the relative position of the supporting rigid frame upright post (5) and the air spring in the air floatation system (3);
the air floating device (3) is provided with 6 air springs, the natural frequency of each air spring is low, the damping is high in resonance, and is small in high frequency, so that the resonance can be effectively avoided, the vibration transmitted by the ground can be absorbed, the energy consumption and vibration reduction can be realized, and the horizontal stability of the table top of the steel rigid T-shaped table (1) can be ensured;
the building structure foundation terrace (10) is used for bearing all loads of a building and transmitting the loads to a foundation to play a role in resisting vibration.
Preferably, the supporting frame comprises supporting rigid frame columns (5), supporting rigid frame coupling beams (7) and supporting rigid frame ground coupling beams (8), the supporting rigid frame coupling beams (7) are connected with the supporting rigid frame columns (5) and integrated to enhance the rigidity and stability of the supporting structure, and the supporting rigid frame ground coupling beams (8) are used for adjusting the uneven settlement which can occur, enhancing the integrity of the foundation, enabling the foundation reaction force to be more uniform and improving the stability of the foundation connected with the supporting rigid frame columns (5).
Preferably, support rigidity frame stand (5) and set up on building structure basis terrace (10), for six round section concrete material stands of setting up, the stand is regular hexagon and distributes, guarantees braced frame's rigidity and overall stability for support air supporting device (3) and steel rigidity T type platform (1), provide suitable the height of placing for the radar is examined equipment and is provided.
Preferably, the electromagnetic signal reflecting plate (6) is a steel plate, is placed in the middle of the supporting frame and penetrates through the whole control device, and is used for shielding electromagnetic signals, blocking electromagnetic radiation from entering and exiting and providing an electromagnetic wave closed environment for detection experiments.
Preferably, the anti-static return air floor also comprises an anti-static return air floor (9) which is used for dissipating electric charges to achieve the purpose of static prevention and simultaneously plays a role of ventilating the foundation terrace (10) of the lower building structure.
Preferably, the steel rigid T-shaped table (1) has certain mass and is designed for a symmetrical structure, so that the rigidity of the whole structure is improved, and the modal distribution is optimized.
Preferably, the table top supporting thickness and the T-shaped interval thickness of the steel rigid T-shaped table (1) are designed according to the micro-scale or sub-nano-scale vibration requirements.
The invention has the beneficial effects that:
the rigid supporting frame is adopted and combined to form a stable system similar to a hexagon, so that the whole structure has the characteristics of high rise and stability; the air-float suspension vibration isolation device is arranged at the top of the supporting system, so that the vibration isolation efficiency is effectively improved; the T-shaped rigid platform is optimally designed, and a plurality of limiters are arranged on the periphery of the platform, so that the whole structure is uniformly balanced, and the stability is enhanced. The micro-vibration control technology for the detection structure effectively isolates and removes the influence of random ground pulsation, so that a micron-scale or sub-nanometer-scale vibration environment can be provided for radar components during electromagnetic performance detection.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 is a schematic view of a towering type suspension micro-vibration equipment construction structure according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the embodiment is applied to the field of micro-vibration control of the detection structure in the electromagnetic shielding performance calibration detection experiment of radar electronic components. The embodiment provides a high-performance micro-vibration environment for a detection experiment, and the micro-vibration is effectively controlled while a detection space is provided by matching the rigid support frame with the air floatation control system.
According to the micro-vibration control device of the high-rise suspension detection structure, the rigid support structure and the air-floatation suspension vibration-proof system jointly form a high-efficiency vibration-reduction and isolation system. The method comprises the following steps: the steel rigid T-shaped platform 1 is a horizontal platform, is used for placing radar detected equipment, and meanwhile is a support frame counterweight to keep balance; stopper system, including I type stopper 2 and II type stoppers 4 for prevent that shock vibration and sudden load from making steel rigidity T type platform 1 break away from strutting arrangement, promote stability, I type stopper 2 is used for restricting the relative position of air spring in steel rigidity T type platform 1 and the air supporting system 3, and II type stoppers 4 are used for restricting the relative position of air spring in rigid frame stand 5 and the air supporting system 3 of support. And the T-shaped rigid platform and the multi-stage limiters ensure the stability of the system. According to micron order or sub-nanometer vibration requirement, rationally carry out optimal design to T type rigidity platform mesa support thickness, T type interval thickness, make entire system mass distribution even, be favorable to overall balance, and the platform is easily assembled, and the later stage is demolishd and is reformed transform and is possessed the convenience. The periphery of the platform is provided with a plurality of limiters, so that the T-shaped rigid platform is prevented from being separated from the supporting device under the action of impact vibration and sudden load, and the overall safety is ensured. The air floating device 3 is provided with 6 air springs, the natural frequency of the air springs is low, the damping is high in resonance, the damping is small in high frequency, the resonance can be effectively avoided, the vibration transmitted by the ground can be absorbed, the energy consumption and vibration reduction can be realized, and the horizontal stability of the table top of the steel rigid T-shaped table 1 can be ensured; the building structure foundation terrace 10 is used for bearing all loads of a building and transmitting the loads to a foundation, and has the vibration resistance effect.
The braced frame is including supporting rigidity frame stand 5, support rigidity frame antithetical couplet roof beam 7 and support rigidity frame ground antithetical couplet roof beam 8, support rigidity frame antithetical couplet roof beam 7 and connect and support rigidity frame stand 5 and become a whole, strengthen bearing structure's rigidity and stability, support rigidity frame ground antithetical couplet roof beam 8 and be used for adjusting the inhomogeneous settlement that probably takes place, strengthen the wholeness on basis, make the ground counter-force more even, promote the steadiness that ground and support rigidity frame stand 5 are connected. Support rigid frame stand 5 and set up on building structure basis terrace 10, for six round section concrete material stands of erectting, support concrete structure and have certain aspect ratio, wherein the circle roof beam, stand, the ground roof beam of each part in top insole constitutes the similar hexagon rigid support structure of shape with the yoke, guarantees braced frame's rigidity and overall stability, improves stability through improving overall rigidity. Settle air supporting suspension antivibration system at whole bearing structure top, this system natural frequency is low, and damping coefficient is big, and the vibration decay is fast, but automatically regulated vibration balance, effectively weakens the vibration conduction, and the micro-vibration environment that provides high performance for the detection of radar class precision electronic components is used for supporting air supporting device 3 and steel rigidity T type platform 1, is examined equipment for the radar and provides suitable the height of placing. Still include electromagnetic signal reflecting plate 6, electromagnetic signal reflecting plate 6 is the steel sheet, places in braced frame's middle part and runs through whole controlling means for shielding electromagnetic signal blocks the electromagnetic radiation and comes in and go out, provides the electromagnetic wave closed environment for the detection experiment. The anti-static return air floor comprises an anti-static return air floor 9 which is used for dissipating charges to achieve the purpose of static prevention and has the function of ventilating a foundation terrace 10 of a lower building structure. The steel rigid T-shaped platform 1 has certain mass and is designed to be a symmetrical structure, so that the rigidity of the whole structure is improved, and the modal distribution is optimized.
The control effect achieved by this embodiment includes:
(1) the efficiency of the constant random pulsation vibration isolation is high. Under the independent detection environment of space, when the electromagnetic shielding performance of the radar component is detected, the influence of the frequent random pulsation is avoided, and the high-performance micro-vibration environment is difficult to provide for the closed electromagnetic wave darkroom. The whole system is combined with the flexible air floating platform through the rigid supporting frame, the supporting frame is large in mass, the overall rigidity is improved, the air floating platform has a high damping characteristic, the natural frequency is low, the vibration isolation performance is good, and the influence of random ground pulsation is effectively removed.
(2) High rise and good stability. The hexagonal supporting structure provides a high-rise space for detection experiments, and the supporting structure is a set of relatively rigid supporting frame, so that the system has high rigidity and good stability. A plurality of limiting devices are arranged under the T-shaped rigid platform, so that the phenomenon that the whole system breaks away from the supporting system under the action of large impact vibration and sudden load is avoided, and the structural stability is ensured.
(3) And the assembly is easy. The high-rise suspension structure adopts beams and columns made of concrete materials, and a frame structure system is formed in an assembly mode according to a certain height-width ratio. The beam and the column at the lower part of the system have smaller sections and lighter weight due to a certain height-width ratio. The beam and the column have good assembly performance, are convenient to construct, shorten the construction period and bring convenience for dismantling and transforming.
(4) The cost performance is high. Compared with the traditional mode, the assembly type construction is adopted, cast-in-place is not needed, the construction process is less, the period is short, the cost is low, a large amount of manpower and material resources are saved, the rigid supporting frame is combined with the air floatation platform, and the influence of micro-vibration on the detection experiment is effectively controlled.
While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It will be understood by those skilled in the art that variations and modifications of the embodiments of the present invention can be made without departing from the scope and spirit of the invention.
Claims (5)
1. A micro-vibration control device of a towering suspension detection structure is characterized by comprising:
the radar detection device comprises a steel rigid T-shaped platform (1), wherein the steel rigid T-shaped platform (1) is a horizontal platform and is used for placing radar detected equipment, and meanwhile, a support frame is used for balancing weight to keep balance;
the limiter system comprises a class I limiter (2) and a class II limiter (4) and is used for preventing impact vibration and sudden load from separating the steel rigid T-shaped table (1) from the supporting device and improving stability, wherein the class I limiter (2) is used for limiting the relative position of the air spring in the steel rigid T-shaped table (1) and the air floatation device (3), and the class II limiter (4) is used for limiting the relative position of the air spring in the supporting rigid frame upright post (5) and the air floatation device (3);
the air floatation device (3), the air floatation device (3) is provided with 6 air springs;
the building structure foundation terrace (10) is used for bearing all loads of a building and transmitting the loads to a foundation to play a role in resisting vibration;
the micro-vibration control device for the high-rise suspension detection structure further comprises an electromagnetic signal reflecting plate (6) and an anti-static return air floor (9), wherein the electromagnetic signal reflecting plate (6) is a steel plate, is placed in the middle of the supporting frame and penetrates through the whole control device, is used for shielding electromagnetic signals, blocking the entrance and exit of electromagnetic radiation and providing an electromagnetic wave closed environment for a detection experiment; the anti-static return air floor (9) is used for dissipating charges to achieve the purpose of static prevention and has the function of ventilating the foundation terrace (10) of the lower building structure.
2. The micro-vibration control device of the towering levitation detection structure as claimed in claim 1, wherein: the supporting frame comprises supporting rigid frame columns (5), supporting rigid frame coupling beams (7) and supporting rigid frame ground coupling beams (8), the supporting rigid frame coupling beams (7) are connected with the supporting rigid frame columns (5) and connected into a whole, the rigidity and the stability of the supporting structure are enhanced, the supporting rigid frame ground coupling beams (8) are used for adjusting the possible uneven settlement, the integrity of the foundation is enhanced, the foundation counter force is more uniform, and the stability of the foundation and the connection of the supporting rigid frame columns (5) is improved.
3. The micro-vibration control device of the towering levitation detection structure as claimed in claim 2, wherein: support rigidity frame stand (5) and set up on building structure basis terrace (10), for six round section concrete material stands of setting, the stand is regular hexagon and distributes, guarantees braced frame's rigidity and overall stability for support air supporting device (3) and steel rigidity T type platform (1), examined equipment for the radar and provide suitable height of placing.
4. The micro-vibration control device of the towering levitation detection structure as claimed in claim 1, wherein: the steel rigid T-shaped platform (1) has certain mass and is designed to be a symmetrical structure, so that the rigidity of the whole structure is improved, and the modal distribution is optimized.
5. The device for controlling the micro-vibration of the towering levitation detection structure as claimed in claim 4, wherein: and designing the table top support thickness and the T-shaped interval thickness of the steel rigid T-shaped table (1) according to the micron-scale or sub-nanometer-scale vibration requirement.
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| CN110807228B (en) * | 2019-10-30 | 2023-10-27 | 中国中元国际工程有限公司 | Air flotation platform performance design method based on influence of aspect ratio factors |
| CN113846666B (en) * | 2021-12-01 | 2022-04-12 | 中国铁路设计集团有限公司 | Micro-vibration multiple control foundation and control method thereof |
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