CN109516386B - Vibration reduction buffering method and system for hoisting offshore steel beam - Google Patents
Vibration reduction buffering method and system for hoisting offshore steel beam Download PDFInfo
- Publication number
- CN109516386B CN109516386B CN201811354238.9A CN201811354238A CN109516386B CN 109516386 B CN109516386 B CN 109516386B CN 201811354238 A CN201811354238 A CN 201811354238A CN 109516386 B CN109516386 B CN 109516386B
- Authority
- CN
- China
- Prior art keywords
- buffering
- steel beam
- vibration
- polyurethane
- buffer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/52—Floating cranes
- B66C23/53—Floating cranes including counterweight or means to compensate for list, trim, or skew of the vessel or platform
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
- F16F15/0232—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means with at least one gas spring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/046—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means using combinations of springs of different kinds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
Abstract
The invention discloses a vibration reduction buffering method and a vibration reduction buffering system for hoisting a steel beam on the sea, which relate to the technical field of cross-sea bridge construction, and comprise an automatic identification system, a vibration testing assembly and a control system, wherein the automatic identification system is arranged on a pier and comprises a storm detection assembly and a vibration testing assembly, the storm detection assembly comprises an anemoscope and a wavemeter, and the vibration testing assembly comprises a hull attitude instrument and an inclinometer; and the vibration reduction system is arranged on the top surface of the pier or the bottom surface of the steel beam. According to the vibration attenuation buffering method for offshore steel beam hoisting, the wind wave monitoring system is arranged, vibration attenuation buffering measures required by steel beam hoisting can be identified, wind wave monitoring and floating crane-steel beam system vibration testing are carried out in real time, the relation between the field wind wave conditions and the floating crane-steel beam system is established, and therefore judgment on whether the steel beam hoisting needs to be subjected to buffering vibration attenuation and the specific buffering vibration attenuation measures required to be adopted is achieved.
Description
Technical Field
The invention relates to the technical field of cross-sea bridge construction, in particular to a vibration damping and buffering method and system for hoisting a marine steel beam.
Background
With the extension of bridge construction from land to sea in China, the construction of sea-crossing bridges becomes the key point of bridge construction in the future. The steel girder of the sea-crossing bridge is generally hoisted by a large-scale floating crane in a whole hole, and the construction difficulty of the sea-crossing bridge is far greater than that of inland and inland river bridges with the same span and scale due to the influence of complex wind and wave environments near the construction sea area. The safety and reliability of hoisting of the steel girder of the sea-crossing bridge under the action of wind and waves face greater risks, and when the girder falls vertically, the impact coefficient of the girder needs to be controlled within a certain range, so that the hoisting safety of the steel girder and related members can be ensured; if the transverse amplitude of the steel beam in the hoisting process is too large, the hoisting steel beam and the hoisted steel beam are easy to collide, so that the difficulty in hoisting the steel beam is increased, and a greater safety risk exists. Therefore, effective measures are needed to adopt corresponding vibration reduction and buffering measures for hoisting the offshore steel beam.
The existing damping device used in the erection of land bridges mainly takes a damping buffer layer or a horizontal damping damper and the like as the main parts, and the damping buffer layer or the horizontal damping damper can only effectively deal with the instantaneous impact generated in a single direction caused by accidents or improper control; the vibration reduction device mainly meets the vibration reduction requirements in the environment with single vibration direction and small amplitude change, such as strong wind, and the like. Therefore, the existing devices are difficult to generate effects in special environments with frequent vertical and transverse vibration, variable directions and large amplitude change under the construction environment of the sea-crossing bridge with large wind and wave.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vibration damping and buffering method and a vibration damping and buffering system for hoisting a marine steel beam, which are suitable for the vibration damping requirements of special environments with frequent vertical and transverse vibration, changeable directions and large amplitude change in the construction of a cross-sea bridge.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the utility model provides a damping buffer system for hoist and mount of marine girder steel, its sets up on treating the pier of hoist and mount girder steel, includes:
the automatic identification system is arranged on the bridge pier and comprises a storm wave detection assembly and a vibration test assembly, wherein the storm wave detection assembly comprises an anemoscope and a wavemeter, and the vibration test assembly comprises a hull attitude instrument and an inclinometer;
and the vibration damping system is arranged on the bridge pier or the steel beam.
On the basis of the technical scheme, the vibration reduction system comprises a buffer assembly, the buffer assembly comprises a buffer cushion, and the buffer cushion is arranged on the top surface of the pier or the bottom surface of the steel beam.
On the basis of the technical scheme, the buffering assembly further comprises liquid-gas buffers, wherein the liquid-gas buffers are arranged at two ends of the steel beam and fixed by using bolt hoops.
On the basis of the technical scheme, the buffer assembly further comprises a tuned damper, wherein the tuned damper comprises a TMD, a TLD, a TLCD or a TLMD and is fixed at a midspan position of the steel beam by using a bolt.
The invention also provides a vibration damping and buffering method for hoisting the offshore steel beam, which is characterized by comprising the following steps of: setting a vibration damping buffer system, and identifying a critical storm condition by using an automatic identification system; and respectively arranging a corresponding transverse buffer member and a corresponding vertical buffer member in the vibration damping system according to the critical stormy wave condition.
On the basis of the technical scheme, the step of respectively setting the corresponding horizontal buffer member and the vertical buffer member in the damping system according to the critical stormy wave condition specifically comprises the following steps:
judging whether the steel beam is hoisted or not to be subjected to buffering and vibration reduction according to the vibration condition of the steel beam;
when the buffering and vibration reduction is needed, judging the on-site wind wave condition, selecting the buffering component and installing according to the following principle: when the field wind wave condition is greater than the use condition of the polyurethane cushion pad and is less than the use condition of the combination of the liquid-gas buffer and the polyurethane cushion pad, the polyurethane cushion pad is independently adopted for vertical buffering; when the on-site wind wave condition is greater than the use condition of the liquid-gas buffer combined with the polyurethane cushion pad, the liquid-gas buffer combined with the polyurethane cushion pad is adopted for vertical buffering; and when the transverse amplitude of the steel beam is larger than the distance between the steel beams, the transverse tuned type shock absorber is adopted for carrying out swing control.
On the basis of the technical scheme, the step of independently adopting the polyurethane cushion pad for vertical buffering comprises the following steps:
determining the desired polyurethane cushion density, size and location;
and spraying a polyurethane foaming material or assembling polyurethane blocks on the top surface of the pier or the bottom surface of the steel beam.
On the basis of the technical scheme, the vertical buffering by combining the liquid-gas buffer and the polyurethane buffering cushion comprises the following steps:
selecting the model and the number of the liquid-gas buffers according to the quality and the amplitude of the steel beam; before the steel beam is formally hoisted, the liquid-gas buffers are uniformly arranged at the collision position of the steel beam and the pier, and are fixed on the bottom surface of the steel beam by bolts.
On the basis of the technical scheme, the step of setting the vibration reduction buffering system and identifying the critical stormy wave condition by using the automatic identification system specifically comprises the following steps: installing an anemoscope and a wavemeter at a bridge site of a steel beam to be hoisted, wherein the anemometer and the wavemeter are used for monitoring wind waves in the hoisting process of the steel beam; after the steel beam and the floating crane are in place, a hull attitude instrument is installed at the center of mass of the floating crane, and an inclinometer is installed at the center of mass of the steel beam; establishing a relation between a wind wave condition and vibration of a floating crane-steel beam hoisting system; and judging whether the steel beam is hoisted by buffering and damping and the concrete buffering and damping measures which need to be adopted according to the vibration condition of the steel beam.
On the basis of the technical scheme, the concrete buffering and vibration damping measures comprise polyurethane cushion buffering, liquid-gas buffer combined polyurethane cushion buffering and tuned type vibration damper vibration damping.
Compared with the prior art, the invention has the advantages that:
(1) according to the vibration attenuation buffering method for offshore steel beam hoisting, the wind wave monitoring system is arranged, vibration attenuation buffering measures required by steel beam hoisting can be identified, wind wave monitoring and floating crane-steel beam system vibration testing are carried out in real time, the relation between the field wind wave conditions and the floating crane-steel beam system is established, and therefore judgment on whether the steel beam hoisting needs to be subjected to buffering vibration attenuation and the specific buffering vibration attenuation measures required to be adopted is achieved.
(2) The damping and buffering system for hoisting the offshore steel beam is simple in structure, the used polyurethane cushion material is convenient to process and install and low in price, the liquid-gas buffer and the transverse tuned type damper are convenient to install and can be recycled, and the damping and buffering system can be obtained by carrying out minimum change on the conventional offshore steel beam hoisting system.
(3) The liquid-gas buffer used in the vibration damping buffer system for hoisting the offshore steel beam can convert mechanical energy into pressure energy and heat energy by utilizing the compressibility of gas, is used for prolonging the action time of impact load and absorbing and converting the energy of the impact load; the compressed gas is used as the return spring, so that the fatigue phenomenon of a steel spring in a common buffer device is eliminated, abrasion-free work is realized, the service life of the buffer device can be greatly prolonged, the maintenance is reduced, and the buffer device has the characteristics of balanced resistance, large buffer energy, convenience in installation and the like.
Drawings
FIG. 1 is a schematic structural diagram of a vibration damping and buffering system for hoisting a steel beam on the sea in the embodiment of the invention;
FIG. 2 is a schematic view showing the arrangement of a polyurethane bumper pad on the top surface of a pier in an embodiment of the present invention;
FIG. 3 is a schematic view of the arrangement of the polyurethane cushion pad on the bottom surface of the steel beam pad in the embodiment of the present invention;
FIG. 4 is a schematic view of an arrangement of a hydropneumatic buffer according to an embodiment of the present invention;
FIG. 5 is a schematic view of a combined cushioning arrangement of a liquid-air cushion and a polyurethane cushion according to an embodiment of the present invention;
FIG. 6 is a schematic view of a single transversely tuned absorber arrangement in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of a plurality of laterally tuned vibration dampers according to an embodiment of the present invention.
In the figure: the device comprises a pier 1, a steel beam 2, an anemoscope 3, a wavemeter 4, a ship attitude instrument 5, an inclinometer 6, a polyurethane cushion pad 7, a liquid-gas buffer 8 and a tuned absorber 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 7, an embodiment of the present invention provides a damping and buffering system for hoisting a steel beam on the sea, which is disposed on a pier 1 of a steel beam 2 to be hoisted, and includes:
the automatic identification system is arranged on the bridge pier 1 and comprises a storm wave detection assembly and a vibration test assembly, wherein the storm wave detection assembly comprises an anemoscope 3 and a wavemeter 4, and the vibration test assembly comprises a hull attitude instrument 5 and an inclinometer 6;
and the vibration damping system is arranged on the pier 1 or the steel beam 2 and comprises a buffering assembly for realizing a specific buffering function. In a specific operation, different kinds of buffer assemblies may be provided according to actual storm environment conditions, or a combination of the above buffer assemblies may be used. For example, in the embodiments provided in fig. 2 to 3, a polyurethane cushion pad 7 disposed on the top surface of a pier or the bottom surface of a steel beam is used as a buffer component, mainly for the buffer requirement of vertical vibration; in the embodiment provided in fig. 4, the liquid-air damper 8 is used as a damping component, and the liquid-air damper 8 is arranged at two ends of the steel beam and fixed by using bolt hoops; the liquid-gas buffer 8 converts mechanical energy into pressure energy and heat energy by utilizing the compressibility of gas, is used for prolonging the action time of impact load, absorbs and converts the energy of the impact load, and achieves better buffer effect of vertical vibration; in the embodiment provided in fig. 5, the cushioning assembly is formed by a liquid-air cushion 8 arranged in combination with a polyurethane cushion 7; in the embodiment provided in fig. 6 and 7, the damping assembly is a tuned absorber 9 disposed on a steel beam, and the type of tuned absorber 9 can be selected from common tuned absorbers, including TMD (tuned mass damper), TLD (tuned liquid damper), TLCD (tuned liquid column damper), or TLMD (liquid mass double tuned absorber).
In a specific setting process, the buffer components can be arranged at corresponding positions of the bridge piers and the steel beams according to specific buffer requirements and setting characteristics, for example, in the feasible embodiment, the polyurethane buffer pads are arranged on the top surfaces of the bridge piers or the bottom surfaces of the steel beams; the liquid-gas buffers are arranged at the two ends of the steel beam; the tuned absorber is bolted to the midspan of the steel beam.
The invention also provides a vibration damping and buffering method for hoisting the offshore steel beam, and in one specific embodiment of the invention, the method comprises the following steps:
Establishing a set of field storm wave monitoring system consisting of an anemoscope and a wavemeter at a bridge site of a steel beam to be hoisted, and establishing a set of floating crane-steel beam vibration testing system consisting of a hull attitude tester and an inclinometer for storm wave monitoring in the steel beam hoisting process; after the steel beam and the floating crane are in place, respectively installing a set of hull attitude instrument at the center of mass of the floating crane, and installing a set of inclinometer at the center of mass of the steel beam, wherein the inclinometer is used for monitoring the vibration of the floating crane-steel beam system for hoisting the steel beam at sea; then, establishing a relation between a field wind wave condition and the floating crane-steel beam system through field real-time wind wave monitoring and a floating crane-steel beam system vibration test; and judging whether the steel beam is hoisted by buffering and damping and the concrete buffering and damping measures which need to be adopted according to the vibration condition of the steel beam.
And 2, respectively setting corresponding horizontal buffer parts and vertical buffer parts in the vibration damping system according to the critical stormy wave condition.
One possible method for setting the respective lateral and vertical buffers in the damping system according to critical stormy conditions is as follows:
on one hand, vertical vibration data in the collected field wind wave condition data are respectively compared with data intervals of the polyurethane cushion using conditions, the liquid-gas buffer using conditions and the liquid-gas buffer combined polyurethane cushion using conditions, and vertical buffering parts corresponding to the using conditions are selected for buffering and damping.
When the on-site wind wave condition is greater than the use condition of the polyurethane cushion pad and is smaller than the use condition of the combination of the liquid-gas buffer pad and the polyurethane cushion pad, the polyurethane cushion pad is independently adopted for vertical buffering. Specifically, the required polyurethane cushion density and dimensions are first determined, for example, for a combined highway and railway steel beam having a span of 40 meters, a width of 20 meters, a height of 15 meters and a weight of 1200 tons, four steel beams having a density of 50kg/m are used3Polyurethane cushions with the size of 1.2m multiplied by 0.3m are uniformly distributed at four angular points of the steel beam; and then, polyurethane foam materials are sprayed to generate polyurethane cushion pads, or the polyurethane cushion pads are processed by factories and cut into blocks and then assembled on site and are arranged on the top surfaces of piers or the bottom surfaces of steel beams before the steel beams are hoisted. Preferably, the polyurethane cushion adopted by the invention adopts a medium density (40-60 kg/m) with good buffering effect3) Polyurethane foam is used as a cushion pad, is mainly generated by polyurethane foaming, and has the characteristics of convenience in processing, low price, strong environmental applicability and the like. The polyurethane foam includes both soft foam and hard foam, and a soft foam polyurethane material is preferably used in the present invention. The polyurethane soft foam is mostly in a porous structure, has the performances of low density, good elastic recovery, smaller rigidity and the like, and can absorb impact kinetic energy very quickly when playing a buffering role.
When the wind wave at the bridge site is large, the vertical vibration of the steel beam is large in the hoisting process, the vertical buffering requirement cannot be met by simple polyurethane buffer cushion buffering, and the field wind wave condition is greater than the use condition of combining the liquid-gas buffer and the polyurethane buffer cushion, the liquid-gas buffer and the polyurethane buffer cushion are adopted for vertical buffering; specifically, the type and the number of the liquid-air buffers are selected according to the mass and the amplitude of the steel beam, for example, for a highway-railway dual-purpose steel beam with the span of 40 meters, the width of 20 meters, the height of 15 meters and the weight of 1200 tons, 4-8 liquid-air buffers with the stroke of 30cm and the measuring range of 100 tons can be selected; and then, uniformly arranging the liquid-gas buffers at collision positions of the steel beams and the piers before the steel beams are formally hoisted, and fixing the liquid-gas buffers on the bottom surfaces of the steel beams by bolts.
On the other hand, the transverse vibration frequency of the steel beam can be calculated according to the pendulum length, the transverse vibration frequency of the steel beam is compared with the transverse vibration frequency of the steel beam actually measured on site, the control frequency of the tuned vibration absorber is determined, and a set of recyclable tuned vibration absorber is designed according to the amplitude and the tonnage of the steel beam. The tuned absorbers may be arranged individually or in discrete fashion, with TMD, TLD, TLCD, TLMD, etc. being preferred for the particular transversely tuned absorber.
In the setting process, the tuned absorber can be installed at the middle span position of the steel beam before the steel beam is hoisted, the tuned absorber is fixed by bolts, the better transverse vibration absorption effect is guaranteed, the transverse swing of the steel beam is controlled, and the accurate feeding of the middle span steel beam is guaranteed. The tuned vibration absorber adopted by the invention consists of a mass block, a spring and a damper. The mass block is connected with the main structure through a spring (connecting piece) and a damper (energy dissipation and shock absorption device), and is generally supported or suspended on the main structure. The existence of the mass block causes the original structure to generate additional mass, rigidity and damping, and the natural vibration frequency of the original structure can be tuned through the basic characteristics of the sub-structure, so that the original structure can be as close as possible to the vibration frequency of the main structure for controlling the vibration mode. When the structure generates vibration under the action of external excitation, the main structure drives the tuned mass damping shock absorber system to vibrate together, the inertia force generated by the relative motion of the tuned mass damping shock absorber system counteracts to the structure to control the vibration of the structure, and the dampers in the tuned mass damping shock absorber system can also play a role in energy consumption, so that the aim of reducing the structural vibration reaction is fulfilled.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (8)
1. The utility model provides a damping buffer system for hoist and mount of marine girder steel, its sets up on treating the pier of hoist and mount girder steel, its characterized in that includes:
the automatic identification system is arranged on the bridge pier and comprises a storm wave detection assembly and a vibration test assembly, the storm wave detection assembly comprises an anemoscope and a wavemeter, the vibration test assembly comprises a hull attitude instrument and an inclinometer, and the automatic identification system is used for identifying a critical storm wave condition;
the damping system is arranged on the bridge pier or the steel beam and comprises a buffering assembly, and the buffering assembly comprises a polyurethane buffering cushion, a liquid-gas buffer and a tuned type damper;
when buffering and vibration reduction are needed, the vibration reduction and buffering system sets different types of buffering assemblies according to the critical stormy wave condition, or uses the combination of the buffering assemblies:
when the field wind wave condition is greater than the use condition of the polyurethane buffer cushion and is less than the use condition of the combination of the liquid-gas buffer cushion and the polyurethane buffer cushion, the polyurethane buffer cushion is independently adopted for buffering; when the on-site wind wave condition is greater than the use condition of the liquid-gas buffer combined with the polyurethane cushion pad, the liquid-gas buffer combined with the polyurethane cushion pad is adopted for buffering; when the transverse amplitude of the steel beams is larger than the distance between the steel beams, the tuned vibration absorber is adopted for swing control;
the liquid-gas buffers are arranged at two ends of the steel beam and fixed on the bottom surface of the steel beam by using bolt hoops;
the tuned vibration absorber is fixed at the midspan position of the steel beam by using bolts;
wherein, the polyurethane blotter with the hydropneumatic buffer is vertical bolster, harmonious formula shock absorber is horizontal bolster.
2. The vibration damping and buffering system for hoisting of steel beams at sea according to claim 1, wherein: the polyurethane cushion pad is arranged on the top surface of the pier or the bottom surface of the steel beam.
3. The vibration damping and buffering system for hoisting of steel beams at sea according to claim 1, wherein: the tuned absorber comprises a TMD, TLD, TLCD or TLMD.
4. A vibration damping and buffering method for hoisting an offshore steel beam is characterized by comprising the following steps:
setting a vibration damping buffer system, and identifying a critical storm condition by using an automatic identification system;
setting different types of buffer assemblies in a damping system according to the critical stormy conditions, or using the combination of the buffer assemblies, wherein the buffer assemblies comprise a polyurethane buffer cushion, a liquid-gas buffer and a tuned type damper;
the setting of different types of damping components in the damping system according to the critical stormy wave conditions, or the use of a combination of the damping components specifically includes:
judging whether the steel beam is hoisted or not to be subjected to buffering and vibration reduction according to the vibration condition of the steel beam;
when the buffering and vibration reduction is needed, judging the on-site wind wave condition, selecting the buffering component and installing according to the following principle: when the field wind wave condition is greater than the use condition of the polyurethane buffer cushion and is less than the use condition of the combination of the liquid-gas buffer cushion and the polyurethane buffer cushion, the polyurethane buffer cushion is independently adopted for buffering; when the on-site wind wave condition is greater than the use condition of the liquid-gas buffer combined with the polyurethane cushion pad, the liquid-gas buffer combined with the polyurethane cushion pad is adopted for buffering; when the transverse amplitude of the steel beams is larger than the distance between the steel beams, the tuned vibration absorber is adopted for swing control;
the liquid-gas buffers are arranged at two ends of the steel beam and fixed on the bottom surface of the steel beam by using bolt hoops;
the tuned vibration absorber is fixed at the midspan position of the steel beam by using bolts;
wherein, the polyurethane blotter with the hydropneumatic buffer is vertical bolster, harmonious formula shock absorber is horizontal bolster.
5. The vibration damping and buffering method for hoisting an offshore steel beam according to claim 4, wherein the vibration damping and buffering method comprises the following steps: the vertical buffering with the polyurethane buffer cushion comprises the following steps:
determining the desired polyurethane cushion density, size and location;
and spraying a polyurethane foaming material or assembling polyurethane blocks on the top surface of the pier or the bottom surface of the steel beam.
6. The vibration damping and buffering method for hoisting an offshore steel beam according to claim 4, wherein the vibration damping and buffering method comprises the following steps: the vertical buffering by combining the liquid-gas buffer and the polyurethane buffering cushion comprises the following steps:
selecting the model and the number of the liquid-gas buffers according to the quality and the amplitude of the steel beam;
before the steel beam is formally hoisted, the liquid-gas buffers are uniformly arranged at the collision position of the steel beam and the pier, and are fixed on the bottom surface of the steel beam by bolts.
7. The vibration damping and buffering method for hoisting of steel beams at sea according to claim 4, wherein the vibration damping and buffering system is arranged, and the identification of the critical stormy wave condition by using the automatic identification system specifically comprises the following steps:
installing an anemoscope and a wavemeter at a bridge site of a steel beam to be hoisted, wherein the anemometer and the wavemeter are used for monitoring wind waves in the hoisting process of the steel beam;
after the steel beam and the floating crane are in place, a hull attitude instrument is installed at the center of mass of the floating crane, and an inclinometer is installed at the center of mass of the steel beam;
establishing a relation between a wind wave condition and vibration of a floating crane-steel beam hoisting system;
and judging whether the steel beam is hoisted by buffering and damping and the concrete buffering and damping measures which need to be adopted according to the vibration condition of the steel beam.
8. The vibration damping and buffering method for hoisting an offshore steel beam according to claim 7, wherein the vibration damping and buffering method comprises the following steps: the concrete buffering and vibration damping measures comprise polyurethane cushion buffering, liquid-gas buffer combined polyurethane cushion buffering and tuned type vibration damper vibration damping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354238.9A CN109516386B (en) | 2018-11-14 | 2018-11-14 | Vibration reduction buffering method and system for hoisting offshore steel beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811354238.9A CN109516386B (en) | 2018-11-14 | 2018-11-14 | Vibration reduction buffering method and system for hoisting offshore steel beam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109516386A CN109516386A (en) | 2019-03-26 |
| CN109516386B true CN109516386B (en) | 2020-05-05 |
Family
ID=65777782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811354238.9A Active CN109516386B (en) | 2018-11-14 | 2018-11-14 | Vibration reduction buffering method and system for hoisting offshore steel beam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109516386B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113772011B (en) * | 2021-10-27 | 2022-11-29 | 广州文冲船厂有限责任公司 | Shock absorber structure, mounting method thereof and ship |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6319336A (en) * | 1986-07-09 | 1988-01-27 | Miyaji Tekkosho:Kk | Transporting device |
| CN103276664A (en) * | 2011-04-27 | 2013-09-04 | 清华大学 | Piezoelectric energy-harvesting tuned mass damper |
| CN103318776B (en) * | 2012-06-28 | 2016-01-20 | 上海振华重工(集团)股份有限公司 | Active heave heave compensation control system and control method |
| CN204455848U (en) * | 2015-02-10 | 2015-07-08 | 中交一航局第一工程有限公司 | The installation positioning system of large-scale steel box-girder |
| CN207943788U (en) * | 2018-03-03 | 2018-10-09 | 中交第二航务工程局有限公司 | A kind of steel box-girder lifting limit damper |
-
2018
- 2018-11-14 CN CN201811354238.9A patent/CN109516386B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109516386A (en) | 2019-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103335057B (en) | Tuned mass damper with frame | |
| Xia et al. | Dynamic analysis of a coupled high-speed train and bridge system subjected to collision load | |
| CN108119315B (en) | Floating type fan foundation capable of improving structural stability | |
| CN102425247A (en) | Three-dimensional tuned mass damper | |
| US10889982B2 (en) | Translation-rotation hybrid vibration control system for buildings | |
| Lu et al. | Comparison study of vibration control effects between suspended tuned mass damper and particle damper | |
| CN109516386B (en) | Vibration reduction buffering method and system for hoisting offshore steel beam | |
| CN110453799A (en) | A kind of fluid damping tuned mass damper | |
| CN102677792A (en) | Comprehensive control device for wind-induced vibration of high-rise structure | |
| Luo et al. | Experimental research on the multilayer compartmental particle damper and its application methods on long-period bridge structures | |
| Lu et al. | Particle damping technology based structural control | |
| CN213358305U (en) | Bridge damping support | |
| Shum et al. | Multiple‐tuned liquid column dampers for torsional vibration control of structures: experimental investigation | |
| CN110761432B (en) | Control method for moment generated by rotational inertia | |
| CN110067192B (en) | High-speed rail bridge damping support with high damping self-resetting function and damping method | |
| Christensen et al. | Effective vibration dampers for masts, towers and chimneys | |
| CN109667357B (en) | Active control device with damping liquid box for moment of inertia | |
| CN106835952A (en) | A kind of combined anti-seismic system and combined anti-seismic bridge | |
| CN211792346U (en) | Ship pollutant on-line monitoring device | |
| CN219508362U (en) | Connecting device for bridge expansion joint | |
| Bar-Avi et al. | Planar motion of an articulated tower with an elastic appendage | |
| Latifi et al. | RETRACTED: Vibration Mitigation of Shazand Railway Bridge Induced by Train Using Tuned Mass Damper (TMD) | |
| CN220468607U (en) | Railway beam falling prevention function gradient sandwich interlayer energy absorption device | |
| CN112962421B (en) | Multifunctional stabilizing device for increasing damping of cable-stayed bridge | |
| CN110184902B (en) | Combined type anti-collision energy-consumption damping device for bridge structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |