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CN-122009412-A - Semi-flexible connection structure of large-scale marine floating body and working principle thereof

CN122009412ACN 122009412 ACN122009412 ACN 122009412ACN-122009412-A

Abstract

The invention discloses a semi-flexible connection structure of a large-scale marine floating body, which comprises paired side buffer unit cement shell packages, wherein the paired side buffer unit cement shell packages are oppositely arranged, a plurality of clamping grooves for clamping an intermediate buffer unit are formed in the opposite inner side surfaces along the length direction of the side buffer unit cement shell packages, the clamping of the intermediate buffer unit is jointly completed, a side buffer piece placing groove is formed in the outer side surface of the side buffer unit cement shell package, a side buffer unit is arranged in the side buffer piece placing groove, a steel wire rope end part is arranged on the outer side surface of the side buffer unit, and the steel wire rope penetrates through the side buffer unit and a partition wall between the clamping grooves and the side buffer piece placing groove in the side buffer unit cement shell package and then is connected to the intermediate buffer unit. The invention also discloses the working principle of the connecting structure. The design scheme of the invention is suitable for modularized connection of the large-scale marine floating body, and the overall stability of the large-scale marine floating body is obviously improved.

Inventors

  • YE RENCHUAN
  • SUN SHIFAN
  • JI CHUNYAN
  • ZOU TAO
  • ZHU GUOLIANG
  • KONG YUE

Assignees

  • 江苏科技大学

Dates

Publication Date
20260512
Application Date
20260204

Claims (10)

  1. 1. A large-scale marine floating body semi-flexible connection structure is characterized by comprising side face buffer unit cement shell packages (1) which are arranged in pairs, wherein the side face buffer unit cement shell packages (1) are oppositely arranged, a plurality of clamping grooves (3) for clamping an intermediate buffer unit (2) are formed in the inner side face of the side face buffer unit cement shell packages (1) along the length direction of the side face buffer unit cement shell packages (1), the clamping grooves (3) on the inner side face of the two side face buffer unit cement shell packages (1) are in one-to-one correspondence, the clamping of the intermediate buffer unit (2) is completed jointly, a side face buffer piece placing groove (4) is formed in the outer side face of the side face buffer unit cement shell packages (1) in a position corresponding to the clamping groove (3), a side face buffer unit (5) is arranged in the side face buffer piece placing groove (4), the end portion of a steel wire rope (6) is arranged on the outer side face of the side face buffer unit (5), and the steel wire rope (6) penetrates through the side face buffer unit (5), and the clamping grooves (3) on the side face buffer unit cement shell packages (1) are connected to the intermediate buffer unit (2) in a spacing wall (7).
  2. 2. The semi-flexible connection structure of a large-scale marine floating body according to claim 1, wherein each intermediate buffer unit (2) comprises an integrally formed cylindrical rubber (21) with a cavity, a rectangular intermediate buffer rubber block (22) is arranged in the cavity, and perforations (23) for a steel wire rope to pass through are formed on each side buffer unit (5), each partition wall (7), each side of the cylindrical rubber (21) and each intermediate buffer rubber block (22).
  3. 3. The semi-flexible connection structure for a large-scale marine floating body according to claim 2, wherein one end of a steel wire rope (6) is arranged on the outer side surface of the side surface buffer unit (5) on one side, and the other end of the steel wire rope (6) passes through the through hole on the side surface buffer unit (6), the through hole on the partition wall (7), the through hole on one side surface of the cylindrical rubber (21) and the through hole on the middle buffer rubber block (22) and then is arranged on the end surface of the middle buffer rubber block (22) close to the side surface buffer unit (5) on the other side.
  4. 4. A semi-flexible connection structure for a large-scale marine floating body according to claim 3, wherein the wire ropes (6) connected to the middle buffer rubber block (22) from the side buffer units (5) at both sides are respectively arranged at intervals.
  5. 5. The semi-flexible connection structure of a large-scale marine floating body according to claim 1, wherein the clamping groove (3) is a semicircular structure which is adapted to the cylindrical rubber (21), and after the two semicircular structures are clamped to the middle buffer unit (2), the middle buffer unit (2) is still partially exposed out of the semicircular structure.
  6. 6. The semi-flexible connection structure of the large-scale offshore floating body according to claim 1, wherein the side buffer units (5) are side buffer rubber blocks.
  7. 7. The semi-flexible connection structure of a large-scale marine floating body according to claim 1, wherein the outer side surface of the side surface buffer unit (5) and the two side surfaces of the middle buffer rubber block (22) of the middle buffer unit (2) are respectively provided with a buffer steel plate (8) for preventing the end limiting piece of the steel wire rope (6) from being in direct contact with the rubber block, and the two ends of the steel wire rope (6) are provided with pressing rigging (61) for connecting the buffer steel plates (8).
  8. 8. The semi-flexible connection structure of the large-scale marine floating body according to claim 1, wherein an observation window (9) is further formed on the upper surface of the side buffer unit cement housing package (1) at a position corresponding to the side buffer piece placing groove (4).
  9. 9. The semi-flexible connection structure of a large-scale marine floating body according to claim 1, wherein the length of the steel wire rope (6) is not greater than the distance from the outer side surface of the side surface buffer unit (5) on one side to the end surface of the middle buffer rubber block (22) of the middle buffer unit (2) close to the side surface buffer unit (5) on the other side.
  10. 10. The working principle of the semi-flexible connection structure of the large-scale marine floating body according to claim 1 is characterized by comprising the following working states: 1) Under the working condition of no wind wave action, the marine floating body is in a relatively static state, at the moment, the marine floating body only bears the self weight, the hydrostatic pressure and the slight pretightening force among all parts, the steel wire rope (6) bears the uniformly distributed static tension under the combined action of the self weight and the hydrostatic pressure of the marine floating body, so that the action lines of the resultant forces are always kept collinear, the uniformly stressed state is stably transmitted to the buffer steel plate (8) of the side buffer unit (5) through pressing riggers (61) at the two ends of the steel wire rope (6), the buffer steel plate (8) converts the concentrated point load transmitted by the steel wire rope (6) into uniform surface load, so that the stress is uniformly distributed on the side buffer rubber block tightly attached to the buffer steel plate (8), and the side buffer rubber block generates the tiny deformation under the static tension action so as to offset part of pretightening force, and static buffer is realized; 2) Under the transverse pushing working condition of the side buffer unit cement shell package (1), the transverse force generated by sea waves pushes the marine floating body to generate a horizontal displacement trend, at the moment, the two end faces of the side buffer unit cement shell package (1) in the length direction are stressed first, the concentrated transverse force is uniformly dispersed along the contact surface by virtue of the structural strength of integrated pouring, and the concentrated transverse force is converted into surface load to be transmitted to the whole side buffer unit cement shell package (1); The residual transverse force is transmitted to the steel wire rope (6) through the cement shell package (1) of the side buffering unit, the steel wire rope (6) generates slight elastic bending under the action of the transverse force, tension balance is formed among strands in the steel wire rope (6) in the bending process, and partial transverse force is converted into axial tension while the module displacement is adapted by virtue of the flexible characteristic of the steel wire rope; The method comprises the steps that in the initial stage, the acceleration of an offshore floating body is large, in the process, the buffering action of a side buffering unit cement shell package (1) and the elastic deformation of a steel wire rope (6) cooperatively reduce instant impact, and as the acceleration is reduced, the deformation of the steel wire rope (6) is reset to form rigid constraint, the tension of the steel wire rope (6) and the residual transverse force are synchronously transmitted to a buffering steel plate (8), the buffering steel plate (8) of a middle buffering rubber block (22) and the buffering steel plate (8) of a side buffering unit (5) further transmit the dispersed force to a tightly attached rubber block, the middle buffering rubber block (22) and the side buffering rubber block are subjected to the transverse force to generate lateral shearing deformation, and the rubber converts the kinetic energy of the transverse load into heat energy to dissipate, so that the primary energy absorption is realized; 3) Under the working condition that the cement shells of the two side buffer units are separated and stretched, namely sea waves separate the offshore floating bodies to two sides, the whole pulling force acts on the steel wire ropes (6) on two sides, the steel wire ropes (6) respond to the pulling force change rapidly by virtue of the excellent tensile strength and elastic modulus of the steel wire ropes, the pulling force is ensured to be uniformly distributed to each rope body, the resultant acting lines are always collinear, the unbalanced load phenomenon is effectively avoided, overload fracture of a single steel wire rope (6) is prevented, the pulling force is stably transmitted to the buffer steel plates (8) of the side buffer units (5) through pressing rigging (61) at two ends of the steel wire ropes (6), the buffer steel plates (8) convert the dispersed point load into surface load, and then the force is synchronously transmitted to the side buffer rubber blocks; At the initial stage of the floating body movement, the acceleration is high, one side of the side buffer rubber block is attached to the buffer steel plate (8), the other side of the side buffer rubber block is attached to the partition wall (7) of the side buffer unit cement shell package (1), the side buffer rubber block is squeezed together by the buffer steel plate (8) and the partition wall (7) of the side buffer unit cement shell package (1) under the action of pulling force, uniform compression deformation is generated along the axial direction, a molecular chain in the rubber is stretched and twisted along with the deformation, and part of vibration energy is dissipated by friction force among molecules, so that the primary energy absorption is completed; The residual tension is further transmitted to the middle buffer rubber block (22) through the buffer steel plates (8) of the middle buffer rubber block (22), the tensile force generated by the separation of the cement shell packages (1) of the two side buffer units causes the buffer steel plates (8) on the two sides of the middle buffer rubber block (22) to relatively extrude the middle buffer rubber block (22), the middle buffer rubber block (22) generates controllable compression deformation along the tension direction, and residual vibration energy is dissipated through elastic collision and friction among molecules, so that secondary energy absorption is realized; as the acceleration of the floating body gradually decreases, the deformation of the steel wire rope (6) is reduced, and the steel wire rope is switched from an elastic buffering state to a rigid bearing state; 4) Under the working condition that two side face buffer unit cement shell packages (1) are extruded in opposite directions, sea waves push the marine floating body modules to approach towards the middle, extrusion force on two sides directly acts on the side face buffer unit cement shell packages (1), and the side face buffer unit cement shell packages (1) avoid integral deformation of the structure by virtue of the rigidity characteristic of the side face buffer unit cement shell packages; The clamping groove (3) at the inner side of the cement shell package (1) of the side buffering unit is matched and attached with the cylindrical rubber (21) in structure, so that concentrated extrusion force is uniformly dispersed to the surface of the cylindrical rubber (21); at the moment, the initial movement acceleration of the floating body is larger, the cylindrical rubber (21) structure generates uniform compression deformation under the action of the bidirectional extrusion force, and in the extrusion process, stress is transmitted to the cylindrical rubber (21) structure from the side buffer unit cement shell package (1); As the acceleration of the floating body decreases, the steel wire rope (6) and the buffer steel plate (8) form a rigid support in a cooperative mode.

Description

Semi-flexible connection structure of large-scale marine floating body and working principle thereof Technical Field The invention relates to ocean engineering equipment, in particular to a semi-flexible connection structure of a large-scale offshore floating body and a working principle thereof. Background The large-scale marine floating body is used as key equipment in the fields of marine resource development, offshore engineering operation and the like, and the modular design becomes a core technical path for reducing construction difficulty, improving installation efficiency and adapting to complex marine environments. The connecting structure is used as a core stress hinge of the modularized floating body, directly determines the overall mechanical property, the running stability and the service life of the floating body, and simultaneously meets multiple severe requirements of resisting dynamic load generated by alternating action of sea waves, adapting to multi-directional movements such as relative torsion, displacement, extrusion and the like among modules, having corrosion resistance in a long-term marine environment, being convenient for offshore installation, later maintenance and replacement and the like. The current mainstream marine floating body connection mode mainly comprises three types of rigid connection, flexible connection and semi-rigid connection, but in actual ocean engineering application, the following core technical defects which are difficult to avoid exist: 1) The rigid connection is in a metal welding or bolt connection mode, high structural strength and rigidity can be provided, but the rigid connection cannot be completely adapted to relative torsion, axial displacement, transverse deflection and other movements of the modularized floating body under the action of sea waves, so that dynamic load is highly concentrated at the connection position, the problems of weld joint cracking, bolt deformation, even structural fracture and the like are extremely easily caused, particularly in extreme sea conditions, the damage risk of the rigid connection is obviously increased, the traditional flexible connection is in a mode of hinging, cable binding and the like, the damping coefficient is low, the dynamic load amplification effect caused by waves is obvious, the connector is in a high fatigue state for a long time, key positions such as a hinging head and a cable connection position are easily affected by sea water erosion and marine organism adhesion, serious corrosion abrasion occurs, the connection reliability is reduced, the connection disconnection is difficult under severe sea conditions, and the floating body operation and maintenance are brought with great potential safety hazards. 2) The strength and the vibration damping performance are difficult to cooperate, in order to improve the vibration damping effect, part of the connecting structure adopts flexible materials such as single rubber, polyurethane and the like as a core buffer component, but the tensile strength, the compressive strength and the shearing strength of the materials are generally low, the dynamic loads such as frequent alternate pulling, pressing, torsion and the like cannot be born under the marine environment, the structural failure problems such as permanent deformation, tearing and even breaking are easy to occur, the long-term stable operation of the floating body is difficult to ensure, and the connecting structure designed by strengthening the strength of the metal component can improve the bearing capacity, but lacks the effective buffering vibration damping effect, the dynamic load generated by sea wave impact can be directly transmitted to the main body structure of the floating body, the normal operation of equipment in the floating body is influenced, the fatigue damage of the main body structure is also aggravated, and the whole service life of the floating body is shortened. 3) The installation and maintenance convenience is poor, the economy is poor, the traditional connection structure is mainly designed integrally, the structure is complex, the requirement on assembly precision is high, large-scale special equipment is needed in the offshore installation process, the operation flow is complex, time and labor are consumed, the cost and risk are obviously increased, meanwhile, the core components of the traditional connection structure are mainly designed in a non-detachable mode, once a certain component is damaged, corroded and the like, the whole connection structure is required to be disassembled and replaced, the maintenance difficulty is high, the cost is high, the floating body can be stopped for a long time, the continuity of offshore engineering operation is influenced, in addition, the materials of the high-performance traditional connection structure are selected and the processing technology is complex, the manufacturing cost is high, and the large-scale application of the hi