CN109208991B - Energy dissipation mechanism for connecting upper beam and lower beam - Google Patents
Energy dissipation mechanism for connecting upper beam and lower beam Download PDFInfo
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- CN109208991B CN109208991B CN201810992547.2A CN201810992547A CN109208991B CN 109208991 B CN109208991 B CN 109208991B CN 201810992547 A CN201810992547 A CN 201810992547A CN 109208991 B CN109208991 B CN 109208991B
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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
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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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- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
Abstract
The invention relates to an energy consumption mechanism for connecting an upper beam and a lower beam, which comprises a beam plate fixed on the upper beam, a bracket fixed on the lower beam, a rotating steel plate fixed on the beam plate, a shearing steel block, a first connecting shaft, a second connecting shaft, a sliding block and a plurality of damping pieces; the upper seat body and the lower seat body are arranged on the rotary steel plate, the shearing steel block comprises an integrally formed connecting plate and an arc-shaped steel plate, the connecting plate is rotatably mounted on the support through a first connecting shaft, a sliding groove is formed in the connecting plate, the sliding block is slidably arranged in the sliding groove of the connecting plate, the first connecting shaft vertically penetrates through the connecting plate, the second connecting shaft vertically penetrates through the sliding block, the connecting plate penetrates through the lower seat body, the second connecting shaft and the lower seat body are rotatably mounted together, one end of the damping piece is connected to the arc-shaped steel plate, and the other end of the damping piece is connected to the rotary steel plate. The energy dissipation mechanism has good anti-seismic effect, and belongs to the technical field of house anti-seismic.
Description
Technical Field
The invention relates to the technical field of house earthquake resistance, in particular to an energy dissipation mechanism for connecting an upper beam and a lower beam.
Background
In recent years, a great deal of research work is carried out in China on the aspects of vibration isolation, vibration reduction and vibration control of engineering structures, and great research results are obtained. The structural vibration control technology provides a reasonable and effective way for structural vibration resistance. The energy consumption and shock absorption is a passive control measure, and is to guide the earthquake energy of the input structure to a specially arranged mechanism and element to absorb and consume energy, so that the safety of the main structure can be protected.
The assembled structure is widely used at home and abroad because of the advantages of high production efficiency, good component quality, less construction waste, resource and energy conservation, realization of the green development requirement of 'four-section one-environmental protection', and the like. How to ensure that the assembled structure is not damaged under the action of an earthquake and the overall stability of the structure is ensured becomes a problem to be solved, and the energy consumption vibration reduction technology is one of reliable means.
At present, a plurality of energy-consumption damping devices exist, but the existing energy-consumption damping devices have lower energy consumption efficiency, single-stage earthquake resistance and unsatisfactory damping effect.
Disclosure of Invention
Aiming at the technical problems existing in the prior art, the invention aims at: the energy dissipation mechanism for connecting the upper beam and the lower beam has good anti-seismic effect.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the energy dissipation mechanism for connecting the upper beam and the lower beam comprises a beam plate fixed on the upper beam, a bracket fixed on the lower beam, a rotating steel plate fixed on the beam plate, a shearing steel block, a first connecting shaft, a second connecting shaft, a sliding block and a plurality of damping pieces; the upper seat body and the lower seat body are arranged on the rotary steel plate, the shearing steel block comprises an integrally formed connecting plate and an arc-shaped steel plate, the connecting plate is rotatably mounted on the support through a first connecting shaft, a sliding groove is formed in the connecting plate, the sliding block is slidably arranged in the sliding groove of the connecting plate, the first connecting shaft vertically penetrates through the connecting plate, the second connecting shaft vertically penetrates through the sliding block, the connecting plate penetrates through the lower seat body, the second connecting shaft and the lower seat body are rotatably mounted together, one end of the damping piece is connected to the arc-shaped steel plate, and the other end of the damping piece is connected to the rotary steel plate.
Further is: damping rubber is arranged on the circumferential side surfaces of some damping pieces and is positioned in the through holes of the arc-shaped steel plates, and gaps are reserved on the damping rubber and the inner walls of the through holes of the arc-shaped steel plates.
Further is: a plurality of through holes are formed in the arc-shaped steel plate, damping rubber is arranged on the inner wall of some through holes of the arc-shaped steel plate, and gaps are reserved between the damping rubber and the damping piece.
Further is: the damping piece comprises a first cylindrical part, a first round platform part, a second round platform part and a second cylindrical part which are integrally formed and sequentially connected together; the first cylindrical part is positioned in the through hole of the arc-shaped steel plate, the second cylindrical part is positioned in the through hole of the rotating steel plate, the width of the damping piece is gradually increased from the intersection of the first round platform part and the second round platform part to the first cylindrical part, and the width of the damping piece is gradually increased from the intersection of the first round platform part and the second round platform part to the second cylindrical part.
Further is: the bracket comprises a first inclined plate, a transverse plate and a second inclined plate which are integrally formed; one end of the cross plate is fixed with the upper end of the first inclined plate, the other end of the cross plate is fixed with the upper end of the second inclined plate, and the distance from the upper end of the first inclined plate to the upper end of the second inclined plate is smaller than the distance from the lower end of the first inclined plate to the lower end of the second inclined plate.
Further is: the transverse plate is provided with an upper seat body, the upper seat body is provided with a notch groove and a hole groove, the notch groove is communicated with the hole groove, the connecting plate is inserted into the upper seat body from the notch groove, and the end part of the first connecting shaft is positioned in the hole groove.
Further is: the lower seat body is provided with a notch groove and a hole groove which are communicated, the connecting plate penetrates through the lower seat body from the notch groove, the end part of the second connecting shaft is positioned in the hole groove, and the lower seat body is positioned below the upper seat body.
Further is: the damping piece is made of mild steel.
Further is: the lower end of the first sloping plate and the lower end of the second sloping plate are provided with bottom plates.
Further is: the damping pieces between the arc-shaped steel plate and the rotating steel plate are uniformly distributed.
In general, the invention has the following advantages:
in the damping energy consumption process, the damping piece contacted with the inner wall of the through hole on the arc-shaped steel plate is firstly subjected to shearing deformation, so that the damping energy consumption effect is achieved, when the displacement difference between the arc-shaped steel plate and the rotating steel plate is large, the damping piece (the damping piece provided with damping rubber) which is not contacted with the inner wall of the through hole on the arc-shaped steel plate is subjected to shearing deformation, the damping energy consumption effect is further achieved, the damping rubber can enhance the damping effect, and the damping energy consumption device can adapt to earthquakes with different intensities. The damping device can realize multistage anti-seismic effect through deformation energy consumption, and the soft steel connection of the energy consumption mechanism has the characteristics of convenient and easy installation in construction, detachable dry connection, good and stable energy consumption capability. The steel has good ultimate bearing capacity, can be hinged, and the concrete cannot be made. The first connecting shaft, the second connecting shaft and the sliding block are of split type structure, and are convenient to install.
Drawings
Fig. 1 is a front view of the energy consuming mechanism mounted on the upper and lower beams.
Fig. 2 is a left side view of the energy dissipating mechanism.
Fig. 3 is a perspective view of the energy dissipating mechanism.
Fig. 4 is a perspective view of the assembly of the rotating steel plate and the shear steel block.
Fig. 5 is a perspective view of a rotating steel plate.
Fig. 6 is a perspective view of the assembly of the shear block, the first connecting shaft, the second connecting shaft, and the slider.
Fig. 7 is a perspective view of the bracket.
Fig. 8 is a schematic structural view of the damping member.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
In order to facilitate the unified viewing of the various reference numerals within the drawings of the specification, the reference numerals appearing in the drawings of the specification are now collectively described as follows:
1 is an upper beam, 2 is a lower beam, 3 is a bracket, 4 is a rotating steel plate, 5 is a shearing steel block, 6 is a beam plate, 7 is a damping piece, 8 is a lower seat, 9 is an upper seat, 10 is a first connecting shaft, 11 is a second connecting shaft, 12 is a sliding block, 3-1 is a first sloping plate, 3-2 is a transverse plate, 3-3 is a second sloping plate, 3-4 is a bottom plate, 5-1 is a connecting plate, 5-2 is an arc-shaped steel plate, 5-3 is a sliding groove on the connecting plate, 7-1 is a first cylindrical part, 7-2 is a first round table part, 7-3 is a second round table part, 7-4 is a second cylindrical part, 8-1 is a notch groove on the lower seat, 8-2 is a hole groove on the lower seat, 9-1 is a notch groove on the upper seat, and 9-2 is a hole groove on the upper seat.
For convenience of description, the following orientations will be described below: the vertical, horizontal, front-rear directions described below are consistent with the projected orientation of fig. 1 itself.
Referring to fig. 1, 2 and 3, an energy dissipation mechanism for connecting an upper beam and a lower beam includes a beam plate fixed on the upper beam, a bracket fixed on the lower beam, a rotating steel plate fixed on the beam plate, a shearing steel block, a first connecting shaft, a second connecting shaft, a sliding block and a plurality of damping members. The beam plate is fixed on the lower end face of the upper beam, the upper end of the rotating steel plate is fixed on the beam plate, and the lower end of the bracket is fixed with the lower beam. The rotary steel plate is provided with a lower seat body, the rotary steel plate and the lower seat body are of an integral structure, and the rotary steel plate is plate-shaped and vertically placed. And in combination with the figures 3, 4 and 6, the shearing steel block comprises an integrally formed connecting plate and an arc-shaped steel plate, the connecting plate and the arc-shaped steel plate are of an integral structure, and the arc-shaped steel plate is positioned at the lower end of the connecting plate. The connecting plate is rotatably mounted on the bracket through the first connecting shaft, the connecting plate can rotate relative to the bracket, the connecting plate is provided with a chute, namely, the middle position of the connecting plate is provided with a chute with a through hole, the chute is rectangular, the sliding block is slidably arranged in the chute of the connecting plate, namely, the sliding block is arranged in the chute, and the sliding block can slide in the chute. The first connecting shaft and the second connecting shaft are horizontally arranged and are arranged along the front-back direction, the first connecting shaft vertically penetrates through the connecting plate, the second connecting shaft vertically penetrates through the sliding block, the connecting plate penetrates through the lower base, the second connecting shaft and the lower base are rotatably mounted together, the second connecting shaft and the lower base can rotate relatively, and the second connecting shaft and the sliding block can also rotate relatively. One end of the damping piece is connected to the arc-shaped steel plate, and the other end of the damping piece is connected to the rotating steel plate.
Referring to fig. 4, two matching modes of the damping member and the arc-shaped steel plate are shown, and the first is: damping rubber is arranged on the circumferential side surfaces of some damping pieces and sleeved on the circumferential side surfaces of the corresponding damping pieces, the damping rubber is positioned in the through holes of the arc-shaped steel plates, and gaps are reserved on the damping rubber and the inner walls of the through holes of the arc-shaped steel plates. The rest damping pieces directly penetrate through the through holes of the arc-shaped steel plates, and the rest damping pieces are in contact with the inner walls of the through holes of the arc-shaped steel plates, so that in the damping energy consumption process, the damping pieces in contact with the inner walls of the through holes of the arc-shaped steel plates are firstly subjected to shearing deformation, the damping energy consumption effect is achieved, when the displacement difference between the rotating steel plates and the shearing steel blocks is large, the damping pieces (the damping pieces provided with the damping rubber) not in contact with the inner walls of the through holes of the arc-shaped steel plates are subjected to shearing deformation, the damping energy consumption effect is further achieved, the damping rubber can enhance the damping effect, and the damping device can adapt to earthquakes with different intensities.
Referring to fig. 4, the second mode of the matching between the damping member and the arc-shaped steel plate is: a plurality of through holes are formed in the arc-shaped steel plate, damping rubber is arranged on the inner wall of some through holes of the arc-shaped steel plate, the damping piece penetrates through the damping rubber, and gaps are reserved between the damping rubber and the damping piece. The rest damping pieces directly penetrate through the through holes of the arc-shaped steel plates, and the rest damping pieces are in contact with the inner walls of the through holes of the arc-shaped steel plates, so that in the damping energy consumption process, the damping pieces in contact with the inner walls of the through holes of the arc-shaped steel plates are firstly subjected to shearing deformation, the damping energy consumption effect is achieved, when the displacement difference between the rotating steel plates and the shearing steel blocks is large, the damping pieces (the damping pieces provided with the damping rubber) not in contact with the inner walls of the through holes of the arc-shaped steel plates are subjected to shearing deformation, the damping energy consumption effect is further achieved, the damping rubber can enhance the damping effect, and the damping device can adapt to earthquakes with different intensities.
Referring to fig. 8, the damping member includes a first cylindrical portion, a first truncated cone portion, a second truncated cone portion, and a second cylindrical portion that are integrally formed and sequentially connected to each other. The first cylindrical part is positioned in the through hole of the arc-shaped steel plate, the second cylindrical part is positioned in the through hole of the rotating steel plate, the damping piece is symmetrical with the intersection of the first round platform part and the second round platform part as a center, the width of the damping piece is gradually increased from the intersection of the first round platform part and the second round platform part to the first cylindrical part, and the width of the damping piece is gradually increased from the intersection of the first round platform part and the second round platform part to the second cylindrical part. The damping piece is made of mild steel.
Referring to fig. 7, the bracket includes a first inclined plate, a transverse plate, and a second inclined plate which are integrally formed; the first sloping plate, the transverse plate and the second sloping plate are of an integral structure. One end (left end) of the cross plate is fixed with the upper end of the first inclined plate, the other end (right end) of the cross plate is fixed with the upper end of the second inclined plate, the distance from the upper end of the first inclined plate to the upper end of the second inclined plate is smaller than the distance from the lower end of the first inclined plate to the lower end of the second inclined plate, namely, the support is narrow in upper edge and wide in lower edge, and thus the support is stable.
Referring to fig. 3 and 7, the support is provided with an upper seat body on the front end surface of the transverse plate, an indentation groove and a hole groove are formed in the upper seat body, the indentation groove penetrates through the upper seat body from top to bottom, the axis of the hole groove is horizontal and is communicated with the hole groove from front to back, the connecting plate is inserted into the upper seat body from the indentation groove, the width (left-right direction) of the connecting plate is smaller than that of the indentation groove, namely, enough gaps are reserved on the inner walls of the connecting plate and the indentation groove of the upper seat body, enough swinging space is reserved on the indentation groove of the upper seat body, and the end part of the first connecting shaft is positioned in the hole groove.
As shown in fig. 4 and 5, the rotary steel plate and the lower base are integrally formed. The lower seat body is provided with a notch groove and a hole groove, the notch groove penetrates through the lower seat body from top to bottom, the axis of the hole groove is horizontal and is communicated with the hole groove from front to back, the connecting plate penetrates through the lower seat body from the notch groove, the width (left-right direction) of the connecting plate is smaller than that of the notch groove (left-right direction), namely, enough gaps are reserved on the inner walls of the notch groove of the connecting plate and the lower seat body, the connecting plate has enough swing space at the notch groove of the lower seat body, the end part of the second connecting shaft is positioned in the hole groove, and the lower seat body is positioned below the upper seat body.
The lower end of the first sloping plate and the lower end of the second sloping plate are provided with bottom plates, and the bottom plates and the lower beams are fixed together.
The damping pieces between the arc-shaped steel plate and the rotating steel plate are uniformly distributed.
The working principle of the energy consumption mechanism is as follows: when an earthquake occurs, the upper beam and the lower beam are relatively displaced in the horizontal direction (left-right direction), the upper beam drives the rotating steel plate, the lower beam drives the support, the upper beam drives the rotating steel plate to swing relative to the support, and then the arc steel plate and the rotating steel plate are relatively moved or relatively swung, so that the damping piece is deformed, the damping piece is deformed to achieve the damping energy consumption effect, and when the arc steel plate and the rotating steel plate are relatively moved, the sliding block is relatively displaced in the sliding groove of the connecting plate. In the damping energy consumption process, the damping piece contacted with the inner wall of the through hole on the arc-shaped steel plate is firstly subjected to shearing deformation, so that the damping energy consumption effect is achieved, when the displacement difference between the rotating steel plate and the arc-shaped steel plate is large, the damping piece (the damping piece provided with damping rubber) which is not contacted with the inner wall of the through hole on the arc-shaped steel plate is subjected to shearing deformation, the damping energy consumption effect is further achieved, the damping rubber can enhance the damping effect, the earthquake with different intensities can be met, and multistage earthquake resistance is achieved.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (7)
1. An energy dissipation mechanism for connecting an upper beam and a lower beam, which is characterized in that: the device comprises a beam plate fixed on an upper beam, a bracket fixed on a lower beam, a rotating steel plate fixed on the beam plate, a shearing steel block, a first connecting shaft, a second connecting shaft, a sliding block and a plurality of damping pieces; the rotary steel plate is provided with a lower seat body, the shearing steel block comprises an integrally formed connecting plate and an arc-shaped steel plate, the connecting plate is rotatably mounted on the bracket through a first connecting shaft, a sliding groove is formed in the connecting plate, a sliding block is slidably arranged in the sliding groove of the connecting plate, the first connecting shaft vertically penetrates through the connecting plate, a second connecting shaft vertically penetrates through the sliding block, the connecting plate penetrates through the lower seat body, the second connecting shaft and the lower seat body are rotatably mounted together, one end of the damping piece is connected to the arc-shaped steel plate, and the other end of the damping piece is connected to the rotary steel plate; damping rubber is arranged on the circumferential side surfaces of some damping pieces and is positioned in the through holes of the arc-shaped steel plates, and gaps are reserved on the damping rubber and the inner walls of the through holes of the arc-shaped steel plates; a plurality of through holes are formed in the arc-shaped steel plate, damping rubber is arranged on the inner wall of some through holes of the arc-shaped steel plate, and gaps are reserved between the damping rubber and the damping piece; the damping piece comprises a first cylindrical part, a first round platform part, a second round platform part and a second cylindrical part which are integrally formed and sequentially connected together; the first cylindrical part is positioned in the through hole of the arc-shaped steel plate, the second cylindrical part is positioned in the through hole of the rotating steel plate, the width of the damping piece is gradually increased from the intersection of the first round platform part and the second round platform part to the first cylindrical part, and the width of the damping piece is gradually increased from the intersection of the first round platform part and the second round platform part to the second cylindrical part.
2. An energy dissipating mechanism for connecting an upper beam to a lower beam as defined in claim 1, wherein: the bracket comprises a first inclined plate, a transverse plate and a second inclined plate which are integrally formed; one end of the cross plate is fixed with the upper end of the first inclined plate, the other end of the cross plate is fixed with the upper end of the second inclined plate, and the distance from the upper end of the first inclined plate to the upper end of the second inclined plate is smaller than the distance from the lower end of the first inclined plate to the lower end of the second inclined plate.
3. An energy dissipating mechanism for connecting an upper beam to a lower beam as defined in claim 2, wherein: the transverse plate is provided with an upper seat body, the upper seat body is provided with a notch groove and a hole groove, the notch groove is communicated with the hole groove, the connecting plate is inserted into the upper seat body from the notch groove, and the end part of the first connecting shaft is positioned in the hole groove.
4. An energy dissipating mechanism for connecting an upper beam to a lower beam as defined in claim 1, wherein: the lower seat body is provided with a notch groove and a hole groove which are communicated, the connecting plate penetrates through the lower seat body from the notch groove, the end part of the second connecting shaft is positioned in the hole groove, and the lower seat body is positioned below the upper seat body.
5. An energy dissipating mechanism for connecting an upper beam to a lower beam as defined in claim 1, wherein: the damping piece is made of mild steel.
6. An energy dissipating mechanism for connecting an upper beam to a lower beam as defined in claim 2, wherein: the lower end of the first sloping plate and the lower end of the second sloping plate are provided with bottom plates.
7. An energy dissipating mechanism for connecting an upper beam to a lower beam as defined in claim 1, wherein: the damping pieces between the arc-shaped steel plate and the rotating steel plate are uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810992547.2A CN109208991B (en) | 2018-08-29 | 2018-08-29 | Energy dissipation mechanism for connecting upper beam and lower beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810992547.2A CN109208991B (en) | 2018-08-29 | 2018-08-29 | Energy dissipation mechanism for connecting upper beam and lower beam |
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| Publication Number | Publication Date |
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| CN109208991A CN109208991A (en) | 2019-01-15 |
| CN109208991B true CN109208991B (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810992547.2A Active CN109208991B (en) | 2018-08-29 | 2018-08-29 | Energy dissipation mechanism for connecting upper beam and lower beam |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11152929A (en) * | 1997-11-21 | 1999-06-08 | Shimizu Corp | Earthquake resistant reinforcing method for building of steel frame construction |
| JP2006249790A (en) * | 2005-03-11 | 2006-09-21 | Sus Corp | Shear block damper |
| JP2011099520A (en) * | 2009-11-06 | 2011-05-19 | Kajima Corp | Rotational deformation type seismic control device |
| CN106760848A (en) * | 2016-12-22 | 2017-05-31 | 广州大学 | A kind of damper for house bean column node |
| CN106869357A (en) * | 2017-03-23 | 2017-06-20 | 中国石油大学(华东) | A kind of replaceable curved plate damper of two benches power consumption damping sheet |
| CN206328885U (en) * | 2016-12-22 | 2017-07-14 | 广州大学 | A kind of damper for house parallel girder |
-
2018
- 2018-08-29 CN CN201810992547.2A patent/CN109208991B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11152929A (en) * | 1997-11-21 | 1999-06-08 | Shimizu Corp | Earthquake resistant reinforcing method for building of steel frame construction |
| JP2006249790A (en) * | 2005-03-11 | 2006-09-21 | Sus Corp | Shear block damper |
| JP2011099520A (en) * | 2009-11-06 | 2011-05-19 | Kajima Corp | Rotational deformation type seismic control device |
| CN106760848A (en) * | 2016-12-22 | 2017-05-31 | 广州大学 | A kind of damper for house bean column node |
| CN206328885U (en) * | 2016-12-22 | 2017-07-14 | 广州大学 | A kind of damper for house parallel girder |
| CN106869357A (en) * | 2017-03-23 | 2017-06-20 | 中国石油大学(华东) | A kind of replaceable curved plate damper of two benches power consumption damping sheet |
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| CN109208991A (en) | 2019-01-15 |
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