CN105971148A - Universal swing track supporting tuned mass damper - Google Patents
Universal swing track supporting tuned mass damper Download PDFInfo
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- 238000013016 damping Methods 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
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- 230000004044 response Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/0215—Bearing, supporting or connecting constructions specially adapted for such buildings involving active or passive dynamic mass damping systems
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
- E04H9/023—Bearing, supporting or connecting constructions specially adapted for such buildings and comprising rolling elements, e.g. balls, pins
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Abstract
本发明提供了万向摆动轨道支撑式调谐质量阻尼器,结构包括支座、半球形质量块、斜拉弹簧和阻尼器;所述支座呈柱体状并且支座的上部设有圆弧形凹面,圆弧形凹面上设有重型万向球,所述半球形质量块的底部置于圆弧形凹面中、半球形质量块的上部四周分别通过斜拉弹簧和阻尼器与支座连接。支座的圆弧形凹面上设有高阻尼橡胶缓冲层,所述重型万向球固定在高阻尼橡胶缓冲层上;本发明能够对不同方向的风振和地震结构反应进行控制,在风振和地震作用下半球形质量块可万向摆动,摆动时能够使斜拉弹簧和粘滞流体阻尼器同时运动消能。
The invention provides a tuning mass damper supported by a universal swing track, the structure includes a support, a hemispherical mass block, a diagonal spring and a damper; the support is in the shape of a cylinder and the upper part of the support is provided with a On the concave surface, a heavy-duty universal ball is arranged on the arc-shaped concave surface, the bottom of the hemispherical mass block is placed in the arc-shaped concave surface, and the upper part of the hemispherical mass block is connected to the support through cable-stayed springs and dampers respectively. The arc-shaped concave surface of the support is provided with a high-damping rubber buffer layer, and the heavy-duty universal ball is fixed on the high-damping rubber buffer layer; The hemispherical mass block can swing universally under the action of earthquake and earthquake, and can make the inclined spring and the viscous fluid damper move simultaneously to dissipate energy when swinging.
Description
技术领域 technical field
本发明涉及一种装配于建筑物上部,在重型万向球轨道支撑体系作用下的调谐质量阻尼器,属于土木结构振动控制技术领域,具体的是一种用于结构抗风抗震的可万向运动的调谐质量阻尼器。 The invention relates to a tuned mass damper assembled on the upper part of a building under the action of a heavy-duty universal ball track support system, belonging to the technical field of vibration control of civil structures, in particular to a universal damper for wind and earthquake resistance of structures. Sport's tuned mass dampers.
背景技术 Background technique
随着土木工程结构抗风抗震设计理论的发展,传统的设计方法难以满足抗震抗风设计的需要,人们根据结构在强风和地震作用下的破坏机理,并借鉴机械、航空航天等领域内的结构减振控制理论、技术和应用成果,进行了土木工程结构减振控制技术的研究与应用。随着结构振动控制技术的快速发展和实践,作为传统结构被动减振体系调谐质量阻尼器(Tuned Mass Damper,简称TMD)系统成为土木工程的研究热点,并应用到一些高层建筑、高耸结构中去。 With the development of wind and earthquake resistance design theory of civil engineering structures, traditional design methods are difficult to meet the needs of earthquake and wind resistance design. Vibration control theory, technology and application results, research and application of civil engineering structure vibration control technology. With the rapid development and practice of structural vibration control technology, the Tuned Mass Damper (TMD) system as a traditional structural passive vibration reduction system has become a research hotspot in civil engineering and has been applied to some high-rise buildings and towering structures. .
TMD系统是在建筑结构顶层加上惯性质量,并配以弹簧系统和阻尼系统,通过共振原理,对结构某一振型加以控制,以此达到减振的效果。TMD系统能有效衰减主结构的振动反应,对结构的振动有明显的控制效果,所以主结构可以减小构件截面尺寸、减小配筋、简化施工,明显节省结构工程造价;占用极少的建筑面积,且便于安装、维修和更换;可以充分利用主结构已有的结构作为TMD,不必专门设置调谐装置;采用TMD对于某些难以采取传统加强措施的结构,如高层结构、高层塔架结构、大跨度结构、海洋平台等重大结构,提供了一条可替代的减振措施。调谐质量阻尼器在高层和高耸结构抗震、抗风控制中有广阔的应用前景。与传统的结构抗震设计相比,采用TMD系统较早得到结构工程专家的认可,被用来控制结构的风振与地震反应。 The TMD system adds inertial mass on the top floor of the building structure, and is equipped with a spring system and a damping system. Through the principle of resonance, a certain vibration mode of the structure is controlled to achieve the effect of vibration reduction. The TMD system can effectively attenuate the vibration response of the main structure and have an obvious control effect on the vibration of the structure, so the main structure can reduce the cross-sectional size of the components, reduce the reinforcement, simplify the construction, and obviously save the cost of the structural engineering; it occupies very little building area, and it is easy to install, maintain and replace; the existing structure of the main structure can be fully utilized as the TMD, and no special tuning device is required; TMD is used for some structures that are difficult to take traditional strengthening measures, such as high-rise structures, high-rise tower structures, For major structures such as long-span structures and offshore platforms, an alternative vibration reduction measure is provided. Tuned mass dampers have broad application prospects in the anti-seismic and wind-resistant control of high-rise and towering structures. Compared with the traditional anti-seismic design of structures, the adoption of TMD system has been recognized by structural engineering experts earlier, and it is used to control the wind vibration and earthquake response of structures.
调谐液体阻尼器(Tuned Liquid Damper,简称TLD)作为TMD系统理论的衍生的一种被动耗能减振装置近年来进行了大量的研究和应用。调谐液体阻尼器利用固定水箱中的液体作为惯性质量,在晃动过程中产生的动侧力来提供减振作用。其具有构造简单,安装容易,自动激活性能好,不需要启动装置等优点,可兼作供水水箱使用。 Tuned liquid dampers (Tuned Liquid Damper (TLD for short) is a kind of passive energy dissipation vibration damping device derived from the TMD system theory, and a lot of research and application have been carried out in recent years. The tuned liquid damper uses the liquid in the fixed tank as an inertial mass to provide vibration damping by the dynamic side force generated during the sloshing process. It has the advantages of simple structure, easy installation, good automatic activation performance, no need for a starting device, etc., and can also be used as a water supply tank.
属于被动控制的调谐质量阻尼器目前还存在一些缺陷:建筑结构受到的风振地震作用荷载是来自不同方向,现有轨道支撑体系的TMD只能在水平相对固定的方向运动,无法对不同方向的风振地震作用进行减振控制。 There are still some defects in passively controlled tuned mass dampers: the wind-induced and earthquake-induced loads on the building structure come from different directions, and the TMD of the existing track support system can only move in a relatively fixed direction horizontally, and cannot respond to loads in different directions. Vibration control for wind-induced earthquakes.
发明内容 Contents of the invention
本发明的目的旨在将TMD和TLD结合起来,使其优势互补而提供一种耗能能力明显、形式更简单并可对不同方向的风振和地震反应都能进行控制的调谐质量阻尼器。 The purpose of the present invention is to combine TMD and TLD to complement each other to provide a tuned mass damper with obvious energy dissipation capacity, simpler form and controllable wind vibration and earthquake responses in different directions.
本发明的万向摆动轨道支撑式调谐质量阻尼器的技术方案如下: The technical scheme of the universal swing track supported tuned mass damper of the present invention is as follows:
结构包括支座、半球形质量块、斜拉弹簧和阻尼器;所述支座呈柱体状并且支座的上部设有圆弧形凹面,圆弧形凹面上设有重型万向球,所述半球形质量块的底部置于圆弧形凹面中、半球形质量块的上部四周分别通过斜拉弹簧和阻尼器与支座连接。支座的圆弧形凹面上设有高阻尼橡胶缓冲层,所述重型万向球固定在高阻尼橡胶缓冲层上。 The structure includes a support, a hemispherical mass block, a cable-stayed spring and a damper; the support is in the shape of a cylinder and the upper part of the support is provided with an arc-shaped concave surface, and a heavy-duty universal ball is arranged on the arc-shaped concave surface. The bottom of the hemispherical mass block is placed in the arc-shaped concave surface, and the surroundings of the upper part of the hemispherical mass block are respectively connected to the support through oblique tension springs and dampers. A high-damping rubber buffer layer is provided on the arc-shaped concave surface of the support, and the heavy-duty universal ball is fixed on the high-damping rubber buffer layer.
为了使半球形质量块能够更好的摆动,所述重型万向球设有多个并且从圆弧形凹面的中心向四周辐射式排列设置。 In order to enable the hemispherical mass to swing better, there are multiple heavy-duty universal balls arranged radially from the center of the arc-shaped concave surface to the surroundings.
为了防止半球形质量块摆动过大从轨道脱落进而撞坏结构,所述支座上设有限位装置。 In order to prevent the hemispherical mass from swinging too much and falling off the track to damage the structure, a limiting device is provided on the support.
为了方便安装使用,所述重型万向球的底部设有螺杆,重型万向球通过螺杆嵌入到高阻尼橡胶缓冲层中;所述支座的底部设有固定底板,所述固定底板上设有螺孔。 In order to facilitate installation and use, the bottom of the heavy-duty universal ball is provided with a screw, and the heavy-duty universal ball is embedded in the high-damping rubber buffer layer through the screw; the bottom of the support is provided with a fixed bottom plate, and the fixed bottom plate is provided screw holes.
为了便于半球形质量块的摆动,所述圆弧型凹面的弧度与半球形质量块的半球弧度一致。 In order to facilitate the swing of the hemispherical mass, the arc of the arc-shaped concave surface is consistent with the hemispherical arc of the hemispherical mass.
为了降低成本、方便使用,所述支座为钢壳混凝土实心结构,所述半球形质量块为全钢或钢壳混凝土实心结构。 In order to reduce costs and facilitate use, the support is a solid structure of steel shell concrete, and the hemispherical mass block is a solid structure of all steel or steel shell concrete.
为了更好的控制结构来自不同方向的震动,所述半球形质量块的上部通过四根斜拉弹簧与支座相连接,相邻两个斜拉弹簧的夹角为90°,并且每两个斜拉弹簧之间设有一个阻尼器,相邻两个阻尼器的夹角为90°,相邻的斜拉弹簧和阻尼器的夹角为45°;所述阻尼器的连接处为球头铰接,可发生一定角度的扭转,所述阻尼器为粘滞流体阻尼器。 In order to better control the vibration of the structure from different directions, the upper part of the hemispherical mass block is connected to the support through four oblique springs, the angle between two adjacent oblique springs is 90°, and every two There is a damper between the cable-stayed springs, the angle between two adjacent dampers is 90°, and the angle between the adjacent cable-stayed springs and the damper is 45°; the connection of the dampers is a ball joint Hinged, torsion at a certain angle can occur, and the damper is a viscous fluid damper.
本发明相对于现有技术具有以下优点: Compared with the prior art, the present invention has the following advantages:
本发明能够对不同方向的风振和地震结构反应进行控制,在风振和地震作用下半球形质量块可万向摆动,摆动时能够使斜拉弹簧和粘滞流体阻尼器同时运动消能。 The invention can control the structural responses of wind vibration and earthquake in different directions, and the hemispherical mass block can swing universally under the action of wind vibration and earthquake, and can make the inclined spring and the viscous fluid damper move simultaneously to dissipate energy when swinging.
本发明可根据结构自振周期调整相应的斜拉弹簧刚度,还可调整半球形质量块与重型万向球轨道接触点高度调整频率以适用于不同高层结构的不同频率,并具有自动复位的功能。 The invention can adjust the stiffness of the corresponding cable-stayed spring according to the natural vibration period of the structure, and can also adjust the height of the contact point between the hemispherical mass block and the heavy-duty universal ball track to adjust the frequency to be suitable for different frequencies of different high-rise structures, and has the function of automatic reset .
本发明在重型万向球轨道下方设置缓冲层可有效缓冲半球形质量块竖向的冲击力。 In the present invention, a buffer layer is arranged under the heavy-duty universal ball track, which can effectively buffer the vertical impact force of the hemispherical mass block.
本发明整个装置构造简单、稳定性和耐久性高,耗能效果好;被动反应灵敏,自动激活应能好,提高了高层结构的使用舒适度,能够对高层建筑、高耸结构起很好的保护作用。 The whole device of the present invention has simple structure, high stability and durability, good energy consumption effect; sensitive passive response, good automatic activation performance, improves the use comfort of high-rise structures, and can provide good protection for high-rise buildings and towering structures effect.
附图说明 Description of drawings
图1是本发明的调谐质量阻尼器三维示意图; Fig. 1 is a three-dimensional schematic diagram of a tuned mass damper of the present invention;
图2是本发明的调谐质量阻尼器正立面剖面图示意图; Fig. 2 is a schematic diagram of a front elevation sectional view of a tuned mass damper of the present invention;
图3是本发明中的重型万向球三维示意图; Fig. 3 is a three-dimensional schematic diagram of a heavy-duty universal ball in the present invention;
图4是本发明中的重型万向球剖面图示意图; Fig. 4 is a schematic diagram of a cross-sectional view of a heavy-duty universal ball in the present invention;
图5是本发明的重型万向球轨道排列示意图; Fig. 5 is a schematic diagram of the track arrangement of the heavy-duty universal ball of the present invention;
图6是本发明的调谐质量阻尼器俯视图示意图。 Fig. 6 is a schematic top view of the tuned mass damper of the present invention.
具体实施方式 detailed description
以下结合附图,对本发明的万向摆动轨道支撑式调谐质量阻尼器做进一步的详细说明。 The universal oscillating track supported tuned mass damper of the present invention will be further described in detail below with reference to the accompanying drawings.
如图1至图6所示,本发明的万向摆动轨道支撑式调谐质量阻尼器,包括支座1、半球形质量块2、四个斜拉弹簧3和四个粘滞流体阻尼器4;支座1为柱体状并且上部设有圆弧形凹面,支座1的圆弧形凹面上设有高阻尼橡胶缓冲层8,高阻尼橡胶缓冲层8上设有多个重型万向球6,重型万向球6从圆弧形凹面的中心向四周辐射式排列设置。半球形质量块2的底部置于圆弧形凹面中,圆弧型凹面的弧度与半球形质量块2的半球弧度一致,半球形质量块2的上部通过四根斜拉弹簧3与支座1相连接,相邻两个斜拉弹簧3的夹角为90°,并且每两个斜拉弹簧3之间设有一个粘滞流体阻尼器4,相邻两个粘滞流体阻尼器4的夹角为90°,相邻的斜拉弹簧3和粘滞流体阻尼器4的夹角为45°,粘滞流体阻尼器4的连接处为球头铰接,可发生一定角度的扭转。 As shown in Figures 1 to 6, the universal swing track supported tuning mass damper of the present invention includes a support 1, a hemispherical mass block 2, four oblique springs 3 and four viscous fluid dampers 4; The support 1 is cylindrical and has an arc-shaped concave surface on the upper part. The arc-shaped concave surface of the support 1 is provided with a high-damping rubber buffer layer 8, and a plurality of heavy-duty universal balls 6 are arranged on the high-damping rubber buffer layer 8. , the heavy-duty universal balls 6 are radially arranged from the center of the arc-shaped concave surface to the surroundings. The bottom of the hemispherical mass 2 is placed in an arc-shaped concave surface, the arc of the arc-shaped concave surface is consistent with the hemispherical arc of the hemispherical mass 2, and the upper part of the hemispherical mass 2 is connected to the support 1 by four cable-stayed springs 3 connected, the angle between two adjacent oblique springs 3 is 90°, and a viscous fluid damper 4 is arranged between every two oblique springs 3, and the clamp of two adjacent viscous fluid dampers 4 The angle is 90°, the included angle between the adjacent oblique spring 3 and the viscous fluid damper 4 is 45°, and the joint of the viscous fluid damper 4 is a ball joint, which can be twisted at a certain angle.
此外,支座1上设有限位装置7,重型万向球6的底部设有螺杆,重型万向球6通过螺杆嵌入到高阻尼橡胶缓冲层8中;支座1的底部设有固定底板5,固定底板5上设有螺孔9,可以方便安装。支座1为钢壳混凝土实心结构,半球形质量块2为全钢或钢壳混凝土实心结构,可通过结构自振周期、质量等高层结构自身参数来确定质量块的质量、材性、及尺寸,再以此定制阻尼器支座、斜拉弹簧和粘滞流体阻尼器,以及重型万向球的规格和个数。 In addition, the support 1 is provided with a limit device 7, the bottom of the heavy-duty universal ball 6 is provided with a screw, and the heavy-duty universal ball 6 is embedded in the high-damping rubber buffer layer 8 through the screw; the bottom of the support 1 is provided with a fixed bottom plate 5 , the fixed bottom plate 5 is provided with screw holes 9, which can facilitate installation. The support 1 is a solid structure of steel shell concrete, and the hemispherical mass block 2 is a solid structure of all steel or steel shell concrete. The quality, material properties, and size of the mass block can be determined by the parameters of the high-rise structure such as the natural vibration period and mass of the structure. , and then customize the specifications and numbers of damper supports, oblique springs, viscous fluid dampers, and heavy-duty universal balls.
由于装置中半球形质量块能够在万向球轨道内万向摆动,当有风振和地震作用于高层结构时,半球形质量块会发生摆动,在摆动时带动斜拉弹簧和粘滞流体阻尼器运动耗能,对于不同方向的风振和地震作用均可进行有效地控制。调整半球形质量块与重型万向球轨道接触点高度及调整弹簧刚度可以调整频率以适用于不同高层结构的不同频率,应用性广泛。质量块具有自复位性,在发生摆动时自身会产生一个与运动方向相反回复力,增加了装置的耗能能力。 Since the hemispherical mass in the device can swing universally in the universal ball track, when wind vibrations and earthquakes act on high-rise structures, the hemispherical mass will oscillate, driving the inclined spring and viscous fluid damping during the swing It can effectively control the wind vibration and earthquake action in different directions. Adjusting the height of the contact point between the hemispherical mass block and the heavy-duty universal ball track and adjusting the spring stiffness can adjust the frequency to be suitable for different frequencies of different high-rise structures, and has wide applicability. The quality block is self-resetting, and when it swings, it will generate a restoring force opposite to the direction of motion, which increases the energy consumption capacity of the device.
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.
Claims (10)
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CN106703246A (en) * | 2016-12-16 | 2017-05-24 | 中铁二十四局集团安徽工程有限公司 | Combined basin-shaped hybrid tuning damper for wind power generation tower |
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CN106451135A (en) * | 2016-10-25 | 2017-02-22 | 中国电力科学研究院 | Shock isolation device for electrical device |
CN106703246A (en) * | 2016-12-16 | 2017-05-24 | 中铁二十四局集团安徽工程有限公司 | Combined basin-shaped hybrid tuning damper for wind power generation tower |
CN107060129A (en) * | 2017-06-15 | 2017-08-18 | 金陵科技学院 | One kind damping shock isolating pedestal |
CN107060129B (en) * | 2017-06-15 | 2022-04-22 | 金陵科技学院 | A damping isolation bearing |
US10202728B1 (en) | 2017-08-14 | 2019-02-12 | Sichuan University | Sliding groove type friction pendulum high-pier bridge seismic mitigation and isolation bearing |
CN107237254A (en) * | 2017-08-14 | 2017-10-10 | 四川大学 | A kind of high pier bridge vibration absorption and isolation support of chute-type friction pendulum |
CN107700913A (en) * | 2017-10-18 | 2018-02-16 | 天津大学 | A kind of multidimensional High Damping Performance device |
CN107700913B (en) * | 2017-10-18 | 2024-03-29 | 天津大学 | Multidimensional high-performance damper |
CN108004916A (en) * | 2017-12-29 | 2018-05-08 | 中铁二院工程集团有限责任公司 | A New Type of Omni-directional Torsional Energy Dissipating Damping Bearing |
CN108004916B (en) * | 2017-12-29 | 2023-07-14 | 中铁二院工程集团有限责任公司 | Novel omnibearing torsion energy-consumption damping support |
CN108130967A (en) * | 2018-02-09 | 2018-06-08 | 山东春天建材科技有限公司 | It is a kind of based on the damping cassette ceiling of lightweight precast body and its manufacture, installation method |
CN108316504A (en) * | 2018-04-03 | 2018-07-24 | 上海建顾减震科技有限公司 | A kind of electromagnetic levitation type universal type horizontal tuned mass damper |
CN108331417A (en) * | 2018-05-25 | 2018-07-27 | 上海建顾减震科技有限公司 | A kind of universal sliding type horizontal tuned mass damper |
CN109537968A (en) * | 2018-11-07 | 2019-03-29 | 上海思纳建筑规划设计股份有限公司 | Super high-rise building limits sidesway damping unit |
CN109610870B (en) * | 2018-12-20 | 2020-12-25 | 浙江明城建设有限公司 | A consolidate bearing structure for building engineering |
CN109610870A (en) * | 2018-12-20 | 2019-04-12 | 董立志 | A kind of reinforcing support construction for architectural engineering |
CN109577363B (en) * | 2018-12-26 | 2024-02-27 | 湖南科技大学 | Spherical hinge type ultralow-frequency universal vibration tuning mass damper |
CN109577363A (en) * | 2018-12-26 | 2019-04-05 | 湖南科技大学 | A kind of universal vibration tuned mass damper of spherical linkage formula ultralow frequency |
CN110056241A (en) * | 2019-05-28 | 2019-07-26 | 广州大学 | A kind of three-dimensional lever damper |
CN110056241B (en) * | 2019-05-28 | 2020-12-08 | 广州大学 | A three-dimensional lever damper |
CN110185738A (en) * | 2019-06-27 | 2019-08-30 | 无锡科技职业学院 | A kind of multi-freedom parallel connection damper mechanism |
CN110185738B (en) * | 2019-06-27 | 2024-01-23 | 无锡科技职业学院 | Multi-degree-of-freedom parallel vibration reduction mechanism |
CN112177415A (en) * | 2020-10-12 | 2021-01-05 | 同济大学 | Annular multi-direction arranged TMD system |
CN112928971A (en) * | 2021-02-19 | 2021-06-08 | 唐山钢铁集团有限责任公司 | Wind-resistant shockproof photovoltaic support |
CN113216433A (en) * | 2021-04-26 | 2021-08-06 | 广州大学 | Tuning frame structure |
CN113184748A (en) * | 2021-05-12 | 2021-07-30 | 公主岭市大鹏航空设备有限公司 | Universal aircraft fuselage jack |
CN113718979A (en) * | 2021-09-08 | 2021-11-30 | 广东华域重工有限公司 | Assembled high-rise building frame with good anti-seismic effect and assembling method |
CN113718979B (en) * | 2021-09-08 | 2022-09-30 | 广东华域重工有限公司 | Assembled high-rise building frame with good anti-seismic effect and assembling method |
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