67 results about "Cross sea" patented technology

The invention provides a sea-crossing bridge deformation prediction method based on an STL-ARIMA-meteorological coupling model, and relates to the technical field of bridge monitoring, and the method comprises the steps: collecting deformation data and meteorological data of a sea-crossing bridge, and enabling the deformation data and the meteorological data to be completely aligned at a time scale; respectively constructing deformation characteristics and meteorological characteristics based on the deformation data and the meteorological data of the sea-crossing bridge; optimizing a seasonal period and a trend window of the STL algorithm based on the deformation data, and decomposing the cumulative settlement time sequence into a trend term, a seasonal term and a residual term; carrying out random forest regression modeling on a residual term obtained by STL decomposition and a meteorological factor to generate a meteorological influence component, and further calculating a meteorological correction residual; a trend term obtained through STL decomposition and a meteorological correction residual error are superposed to generate a trend-correction residual error, the trend-correction residual error serves as an ARIMAX modeling target, a search space is expanded through an autoarchia algorithm, and ARIMAX modeling is driven through meteorological characteristics; and fusing ARIMAX model output, historical season item copying and meteorological feature prediction results to realize multi-scale deformation reconstruction.

The invention relates to the technical field of geodetic survey, in particular to a method for measuring the altitude based on GNSS frequency signals of a Chinese space station. Data such as GNSS satellite precision orbits, clock errors and earth rotation parameters are obtained from an IGS analysis center, RINEX format data are obtained through synchronous observation of a space station receiver and a ground station receiver, and the gravity potential of the space station at the observation moment is determined in combination with an EIGEN-6C4 gravity field model. Deriving a frequency observation value from the carrier phase observation value, establishing an observation equation in a double-frequency ionosphere elimination processing mode, resolving the gravity potential difference between the space station and the ground station, and finally obtaining the gravity potential and the altitude of the ground station. According to the invention, traditional leveling and gravity measurement can be replaced, the cost is obviously reduced, the environmental limitation is overcome, and cross-sea and cross-ocean elevation transmission and global elevation datum unification are supported.

The invention discloses a cross-sea shield construction method under a long-distance complex stratum. The cross-sea shield construction method comprises the steps of construction preparation and site arrangement, end reinforcement, shield machine type selection and debugging, trial tunneling, formal tunneling, muddy water system management, waterproof and reinforcement measures, shield arrival receiving and the like. According to the cross-sea shield construction method under the long-distance and complex stratum, all construction links are systematically optimized, safe and efficient construction of a cross-sea shield tunnel under the long-distance and complex stratum is achieved, and the cross-sea shield construction method can be widely applied to similar projects.

The invention discloses an intelligent load balancing and precise positioning system of an ocean platform floating crane, and particularly relates to the technical field of ocean engineering equipment, which comprises an intelligent load balancing module, a precise positioning module, a dynamic compensation unit and a central control platform, the intelligent load balancing module collects lifting point load and boom attitude data through a multi-dimensional sensor group, and dynamically adjusts the output of an execution mechanism by using an improved particle swarm optimization algorithm in combination with environmental parameters, so that the mean square error of the load is less than or equal to 6%. According to the intelligent load balancing and accurate positioning system of the ocean platform floating crane, dynamic load balancing (the mean square error is smaller than or equal to 6%) and millimeter-level positioning (the error is smaller than or equal to 2.5 mm) under the complex ocean condition are achieved. The system integrates environment sensing and dynamic compensation functions, the wave compensation efficiency under the six-level sea condition is larger than or equal to 94%, the precision and safety of offshore hoisting operation are remarkably improved, and the system is suitable for the fields of deep sea resource development, cross-sea engineering construction and the like.

The present invention discloses a seabed chain clamping driven continuous penetration static penetration device, comprising a frame and a probe rod probe, a counterweight fixedly mounted on one side of the frame, a leveling mechanism fixedly mounted on the inner side of the frame, a clamp fixedly mounted on the bottom inner side of the frame, a chain clamping drive mechanism mounted on the inner side of the frame, a meter fixedly mounted on the top inner side of the frame, a pulley block fixedly mounted on the inner side of the frame, and a hydraulic system fixedly mounted on the inner side of the frame. The present invention has a compact structure, a modular design, full-process video monitoring, stable and reliable operation, can meet the general needs of automatic continuous penetration of underwater static penetration, and has low energy consumption and high cost performance. The present invention can be widely used in a series of offshore engineering projects such as dock construction, offshore wind power, cross-sea bridges and tunnels, energy exploration and development, military logistics support, submarine pipeline laying, offshore artificial islands, marine ranches, marine scientific research, and other project survey tasks such as static penetration.

The present application relates to the field of geodetic surveying, and particularly relates to a method for determining altitude based on GNSS frequency signals of Chinese space station. Through obtaining data such as GNSS satellite precise orbit, clock error and earth rotation parameters from IGS analysis center, RINEX format data is obtained by using synchronous observation of space station and ground station receiver, and the gravity potential of space station observation moment is determined in combination with EIGEN-6C4 gravity field model. The frequency observation value is derived from the carrier phase observation value, the observation equation is established in the dual-frequency ionosphere elimination processing mode, the gravity potential difference between space station and ground station is solved, and finally the gravity potential and altitude of ground station are obtained. The present application can replace the traditional leveling and gravity measurement, significantly reduce the cost, overcome the environmental restriction, and support the cross-sea and cross-ocean height transfer and the global height datum unification.

The invention relates to a sea surface gravitational potential measuring method and device based on a satellite time-frequency strategy, and the method comprises the steps: placing two measuring systems at a land measuring station at the same time, carrying out the calibration and adjustment of clocks, and determining the system error between the clocks through zero baseline comparison; the mobile measurement system is placed on a ship and advances according to a designed experiment route, the measurement system can continuously operate, and position information and gravity potential information on an air route can be measured by combining a positioning system; the ship can sail according to any route, and the gravitational potential difference of any position on the sea surface can be measured with the help of a satellite; after the ship returns, the mobile measurement system and the fixed measurement system need to be compared again, and it is ensured that no large error occurs in the experiment process of the atomic clock. Therefore, the problems that gravitational potential data in the global range cannot be comprehensively obtained in real time, and on-sea gravitational potential measurement and cross-sea measurement are difficult to achieve are solved.

The application relates to a three-dimensional abnormal wave synchronous coupling generation system, method and medium in cross sea conditions, and belongs to the technical field of ocean engineering. The application comprises a parameter calculation module, a wave system coupling module configured to generate a three-dimensional abnormal wave in a physical space position based on coupling growth characteristics between wave systems and expected generation; a scene adaptation module configured to convert a wave number spectrum into a spatial wave surface form for a numerical simulation scene, and perform wave evolution simulation; and a wave making control module configured to convert a processed time sequence into a motion control signal of a wave making device according to driving characteristics of the wave making device, and drive the wave making device to generate the three-dimensional abnormal wave. The application realizes energy efficient focusing through coupling modulation instability, accurately controls the spatial form of the three-dimensional abnormal wave, simultaneously adapts numerical simulation and physical test scenes, and meets diversified demands of ocean engineering on extreme wave simulation.

The invention relates to a static light long-distance sea-crossing permanent railway and highway floating bridge, which is a fundamental change for the design thought of building a long-distance sea-crossing permanent bridge. The biggest problem to be solved is that piers do not need to be built on straits and seabed, the construction difficulty and work amount of cross-sea bridge construction are greatly reduced, and the influence on the straits ecological environment is small. The technical key points are as follows: 1, N relatively static floating islands are built by utilizing seawater buoyancy, the floating islands are synthesized from cheap materials, and bridges are erected on the floating islands; 2, each floating island is formed by uniformly distributing m seabed stainless steel wire ropes on the left side and the right side of the floating island, straightening and firmly holding the seabed stainless steel wire ropes, and the m stainless steel wire ropes are wound and tied on the m reinforced concrete blocks sinking into the seabed respectively; and 3, the absolute horizontal height of the floating island is not changed. The floating island does not freely float on the water surface, and at the lowest tide level, the buoyancy ensures that the m strands of stainless steel wire ropes have moderate tension. And 4, the core principle is as follows: mechanical balance, namely buoyancy F1 = borne bridge gravity G + tensile force F2 of a seafloor stainless steel wire rope.

The invention discloses a sea-crossing cluster assembly type bridge rapid assembly device, and relates to the technical field of bridge construction, the sea-crossing cluster assembly type bridge rapid assembly device comprises a supporting and walking mechanism, and the supporting and walking mechanism comprises a supporting frame and supporting beams arranged on the two sides of the supporting frame; the hoisting mechanism is located in the supporting frame, can move transversely and is used for hoisting and transversely conveying the bridge prefabricated part; the at least one pair of retractable stabilizing mechanisms is symmetrically arranged on the supporting beam and is used for downwards extending out and being inserted into the ground to stabilize the whole equipment during hoisting operation; and a first hydraulic rod, a sliding frame, an inserting plate, a limiting sliding block and a limiting hole are arranged to be matched with one another, and the active stabilizing function of the equipment is achieved. The first hydraulic rod pushes the inserting plate to move downwards along the sliding frame, meanwhile, the limiting sliding block on the inserting plate slides and guides in the limiting hole of the supporting frame, it is ensured that the inserting plate is perpendicularly inserted into the ground, and the effect of firmly anchoring the equipment on the foundation is achieved.

The invention belongs to the technical field of bridge engineering and wind power generation, and relates to a wind barrier power generation device suitable for a sea-crossing bridge, which comprises a wind barrier system, a power generation system and a power supply system, the wind barrier system comprises a barrier strip bracket and a C-shaped barrier strip; the power generation system is installed between every two adjacent C-shaped barrier strips. The power generation system comprises a plurality of power generation units connected in series, each power generation unit comprises a wind turbine module and a power generation module, and the power generation module is arranged between every two adjacent wind turbine modules. The wind turbine module adopts two stages of Savonius wind turbines which rotate coaxially; the power generation module comprises a coil and a magnet tray, the magnet tray is connected with the two-stage Savonius wind turbine through a fan connecting shaft, and the coil is wound on the fan connecting shaft; the power supply system is connected with the magnet tray and converts alternating current generated by the magnet tray into direct current. A series of problems of high construction cost, large energy transmission loss and the like caused by dependence on a power grid or a submarine cable for illumination and maintenance of the existing cross-sea bridge are solved.

The invention discloses a construction ship sprayed concrete stability control system and control method. The control system comprises a ship body motion attitude measurement system, a mechanical arm stability control system and a mechanical arm vibration reduction assembly. The ship body movement posture measuring system is used for measuring the movement state of the workboat in the concrete spraying process in real time and feeding back movement state information to the mechanical arm stability control system; the mechanical arm stability control system is used for processing the received operation state information in real time through an integrated algorithm and logic control and controlling the mechanical arm vibration reduction assembly to conduct vibration reduction on the mechanical arm, and a nozzle is installed at the front end of the mechanical arm. Through high-precision motion monitoring, two-stage active vibration reduction and real-time quality control, the problem that mechanical arm spraying of an overwater workboat is unstable due to wave disturbance is solved, the spraying flatness, thickness uniformity and construction efficiency of ultra-high performance concrete are remarkably improved, and the device is particularly suitable for severe water area projects such as sea-crossing bridges and offshore platforms.

The invention relates to a high-speed rail cross-sea long bridge underwater pier settlement evaluation method, and belongs to the technical field of bridge construction, the method comprises the following steps: dividing a constructed pier body into a plurality of sections along a longitudinal bridge direction, each section being provided with a plurality of pier bodies; selecting one pier body in each section as a reference pier, measuring the relative settlement value of each period of the remaining pier bodies in the section by stages, and calculating the relative settlement mean value of each period; and comparing the relative settlement mean value of the current period with the relative settlement mean value of the previous period until the relative settlement of each pier body of the section is judged to be stable. The relative settlement of the pier body in each completed pier body construction section is obtained to replace the traditional absolute settlement, so that the stability of each pier body can be evaluated as soon as possible according to the completion condition of the pier construction section; the defect that traditional absolute settlement needs to depend on a plurality of measuring platforms erected in the ocean or piers are preferentially constructed to serve as working reference points of absolute settlement measurement is overcome, the evaluation efficiency is greatly improved, and the measurement cost is remarkably reduced.

The invention discloses a treatment method and device for construction waste of sea-crossing bridge construction, and belongs to the technical field of construction waste recycling, the device comprises a concrete recycling module, a magnetic collecting tank, a cyclone separator, a water filtering tank, a water tank and other assemblies, and classified recycling and treatment of reinforcing steel bars, gravel, sand, cement paste and waste water are achieved through the multi-stage separation technology. The treatment method comprises the steps that after the construction waste is crushed, steel bars are separated through the magnetic collecting tank; the remaining concrete material enters a rotating second cavity, and graded separation of gravel, sand and cement paste is achieved through gradient rotating speed and inclined spraying; and finally, solid-liquid separation is completed through a cyclone separator, and the wastewater is recycled or discharged after reaching the standard after being treated. The method realizes efficient resource utilization of the construction waste, has the characteristics of modularization, low cost, environmental protection and the like, and is suitable for green construction of large-scale projects such as sea-crossing bridges and the like.

This invention relates to the field of intelligent building construction technology, specifically disclosing an intelligent generation system for modular scaffolding erection schemes. The system includes an engineering geometric parameter analysis device, a wind field dynamic simulation device, a physical information neural network prediction device, a wind-resistant reinforcement zone generation device, and a real-time meteorological data access device. By integrating computational fluid dynamics with a neural network embedded with physical constraints, based on a three-dimensional building model and real-time meteorological data, it dynamically predicts wind-induced vibration risks and automatically generates wind-resistant reinforcement schemes conforming to the modular rules of scaffolding. By employing the above technical solution, this invention enables high-precision wind vibration early warning and intelligent optimization of scaffolding systems in extreme environments such as super high-rise buildings or cross-sea structures, improving their inherent safety level and construction feasibility.

The invention discloses a railroad bed capable of being frozen on the sea level, and relates to the technical field of ocean engineering and railway transportation. The railway roadbed comprises a roadbed body, the roadbed body is of a hollow box structure capable of floating on the water surface, and steel rails are laid on the top face of the roadbed body. A reinforcing support structure is arranged below the steel rails in the roadbed main body, comprises a truss bearing wall and a steel rail bearing platform, and is used for supporting a load; lateral buoyancy supporting assemblies are arranged on the two sides of the roadbed body and used for providing auxiliary buoyancy and balance. The floating characteristic of the hollow box body is utilized, the hollow box body is laid on the sea surface before freezing in winter, the hollow box body and an ice layer are frozen into a whole after seawater is frozen, and train passing is achieved by directly utilizing the bearing capacity of the ice layer. The roadbed has the advantages of high structural strength, good transverse stability and the like, and can be disassembled and dragged away after sea ice melts in summer, so that the smoothness of a channel is ensured, the seasonal limitation is effectively broken through, and the cross-sea transportation cost is reduced.

The invention relates to a synchronous coupling generation system and method for three-dimensional abnormal waves in cross sea conditions and a medium, and belongs to the technical field of ocean engineering. Comprising a parameter calculation module; the wave system coupling module is configured to combine with a physical space position for generating a three-dimensional abnormal wave based on coupling growth characteristics between wave systems; the scene adaptation module is configured to convert a wave number spectrum into a spatial wave surface form for a numerical simulation scene and perform wave evolution simulation; and the wave making control module is configured to convert the processed time sequence into a motion control signal of the wave making equipment according to the driving characteristics of the wave making equipment, and drive the wave making equipment to generate three-dimensional abnormal waves. Efficient energy focusing is achieved through coupling modulation instability, the spatial form of three-dimensional abnormal waves is accurately controlled, meanwhile, numerical simulation and physical test scenes are adapted, and the diversified requirements of ocean engineering for extreme wave simulation are met.

The invention discloses a method and a system for correcting the local scouring depth of a bridge foundation by considering the combined action of wave flow. The method comprises the following steps: calculating the depth of a local scouring pit of a bridge pier under the action of pure water flow; correcting the local scouring pit depth of the pier under the action of the pure water flow by utilizing an increasing coefficient of the local scouring depth under the influence of waves to obtain the local scouring pit depth of the pier under the combined action of the wave flow; the increasing coefficient is calculated according to the tidal current speed, the maximum speed of a horizontal mass point at the bottom of the seabed and the KC number. According to the method, the calculation precision is improved, the risk caused by small calculation value of local scouring of the sea-crossing bridge foundation is reduced, and the bridge safety is guaranteed.

The invention discloses a sub-cofferdam construction method for cross-sea tunnel construction, which comprises the following steps: S1, constructing a first sub-cofferdam, reserving a first channel, and constructing a first sub-cofferdam tunnel in the first sub-cofferdam; s2, after tunnel construction of the first sub-cofferdam is completed, the first sub-cofferdam is divided into a connecting area and a navigation channel area through steel sheet piles; s3, the cofferdam structure of the channel area is dismantled to form a second channel; s4, a second sub-cofferdam is constructed, and the second sub-cofferdam is made to communicate with the connecting area; s5, a second sub-cofferdam tunnel is constructed, and the second sub-cofferdam tunnel communicates with the first sub-cofferdam tunnel; and S6, the second sub cofferdam structure is dismantled. By the adoption of the scheme, it is guaranteed that a channel is always reserved between the two islands during construction, normal operation can be achieved, and meanwhile the tunnel can be conveniently constructed in the first sub-cofferdam and the second sub-cofferdam in an open excavation mode.

The application discloses a wave power generation-anti-collision-anti-scour integrated cross-sea bridge protection system and method, which comprises a bridge pier system, an anchorage scour prevention module wrapped around the outer periphery of the foundation section of the bridge pier system, an anti-collision and energy capturing mechanism arranged on the two sides of the bridge pier system, an energy conversion assembly arranged between the anti-collision and energy capturing mechanism and the anchorage scour prevention module, and a wave power generation mechanism; the energy conversion assembly comprises a lower cantilever energy conversion mechanism, an upper outer energy conversion mechanism and an upper inner energy conversion mechanism; the wave kinetic energy and potential energy are captured through the three energy conversion mechanisms and the anti-collision and energy capturing mechanism, are converted into electric energy through the wave power generation mechanism transmission mechanism, and are converted into electric energy through the generator; the anti-collision and energy capturing mechanism absorbs the ship collision energy and guides the ship trajectory, the anchorage scour prevention module changes the water flow direction to weaken the scour of the bridge pier system, and the wave power generation, ship anti-collision and anti-scour three functions are integrated and cooperatively operated.

The invention discloses a finite element method-based dynamic-hydraulic calculation method for a bearing platform with any cross section, and aims to solve the problem of errors caused by adopting a pier dynamic-hydraulic calculation method to approximate the bearing platform in the prior art. The method comprises the following steps of: establishing a dynamic balance equation of a deepwater pier under the action of an earthquake, and deducing generalized parameters based on a shape function and a D 'Alembert principle; constructing a simplified analysis model of the bearing platform, adopting a modified shape function to adapt to geometric characteristics of the bearing platform, and regarding the bearing platform mass as concentrated mass to establish a dynamic balance equation; and finally, deducing a computational formula of the dynamic and hydraulic additional mass. The method is clear in theory, high in calculation efficiency and accurate in result, and can be widely applied to convenient calculation of dynamic and hydraulic power of the bearing platform in engineering such as sea-crossing bridges.

The invention discloses a state monitoring method based on a conveying belt of a cross-sea stockpiling line, and relates to the technical field of state monitoring of the conveying belt of the cross-sea stockpiling line, comprehensive monitoring is realized through four steps: step 1, collecting belt no-load reference characteristics, and monitoring foreign matters and tearing through AI visual identification; the method comprises the following steps of: 1, cooperatively identifying abnormities by using vibration and temperature two-dimensional monitoring, 3, evaluating the risk of foreign matter evolution into tearing and the tearing cause, 4, integrating a multi-modal monitoring report to form closed-loop operation and maintenance, and carrying out visual, vibration and temperature multi-dimensional data fusion and reference feature comparison and dynamic verification to obtain a multi-dimensional data fusion model. Foreign matters such as rod-shaped objects and net-shaped objects and tearing are accurately recognized, the problem of visual failure caused by material shielding is effectively solved, the abnormity recognition accuracy is improved, closed-loop management from monitoring to disposal is achieved, safe and stable operation of a cross-sea stockpiling line conveying belt is guaranteed, the operation and maintenance cost is reduced, and the conveying efficiency is improved.

The present disclosure is a vertical position staged self-adjusting wave-resistant anti-ship collision device for a cross-sea bridge, comprising: a collision-proof sleeve box arranged around the bridge foundation near the water surface; a horizontal restraint system arranged between the bridge foundation and the collision-proof sleeve box; a vertical restraint system, one end of which is fixed to the collision-proof sleeve box, and the other end is fixed to the bridge foundation, for providing an action force to the collision-proof sleeve box in the opposite direction of the vertical movement direction or the movement trend direction; an adjusting water tank arranged at the top of the collision-proof sleeve box for adjusting the water entry depth of the collision-proof sleeve box. By using the present disclosure, the collision-proof sleeve box can be locked when small water level changes or small wave actions occur, and vertically adaptive movement is achieved when large water level changes or large wave actions occur, realizing the anti-ship collision function under different water levels, while reducing the up-down high-frequency movement amplitude and cumulative stroke of the collision-proof sleeve box under the random wave action of the marine environment, reducing the wear and tear of the horizontal restraint system, and improving the wave impact resistance and fatigue resistance.

The utility model discloses a mass block suitable for the tuned mass damper of cross-sea bridge, it includes the mass block body of inside hollow, the inside hollow inside filling has counterweight of mass block body, and mass block body includes the front end body and rear end body of being connected, and the front end body is hemispherical shell, and the rear end body is streamline shell, the utility model discloses under the sea current impact, and the front end body is located upstream and first receives the impact, and the rear end body is located downstream and rear end body is streamline and can destroy tail flow field, dissipate impact energy, reduce the water flow resistance that mass block whole received, effectively improve mass block stress performance.

The invention discloses a method for calculating a wave flow force shielding coefficient of a sea-crossing bridge pile group foundation, and belongs to the technical field of pile group foundation wave flow force research. The method comprises the following steps: making a bridge pier, a bearing platform and a pile group foundation in a scaling-down manner, simulating an application scene and installing in a test wave pool; irregular waves are generated in the test wave pool through a wave maker, and the wave height and period of the waves in the test model are simulated; the water depth, the wave height, the wave period, the pile diameter and the pile distance in the test wave pool and the wave flow force borne by the pile foundation are measured respectively; and a wave flow force shielding coefficient calculation formula is provided based on analysis of the on-way change rule of the pile foundation wave flow force shielding coefficient. Compared with a calculation method in the current specification, the calculation method provided by the invention provides convenience for single pile stress re-checking calculation in the pile group, the calculation precision is improved, the cost increase caused by too conservative engineering design calculation is avoided, and the engineering construction cost is effectively saved.

This invention discloses a method for hoisting steel anchor boxes with variable spacing for cable-stayed bridge towers across the sea, belonging to the field of bridge engineering. To address the challenges of short working windows at sea and the low precision, efficiency, and slowness of traditional methods, this invention constructs an integrated intelligent hoisting system. By deploying visual markers and positioning anchor points on the tower columns and steel anchor boxes, and combining differential satellite positioning, inertial measurement units, and other multi-source sensors, the precise pose of the steel anchor boxes is calculated in real time under a unified spatiotemporal reference. Artificial intelligence algorithms are used to predict the dynamic trajectory of sea conditions, the ship's hull, and the hoisting process, and a model predictive controller generates crane linkage compensation commands to dynamically suppress wind and wave disturbances. During the near-field installation phase, the system performs trajectory fine-tuning and anti-collision control based on a segment gap database; finally, a three-way hydraulic jack completes millimeter-level precise alignment and locking. This invention achieves an integrated closed loop of perception, prediction, control, and fine-tuning, significantly improving installation accuracy and efficiency, and shortening the time spent at sea.

This invention discloses a cross-sea combined distributed measurement system and method, relating to the field of bridge construction technology. The cross-sea combined distributed measurement system includes multiple instrument platforms and multiple reference platforms. The multiple instrument platforms are spaced apart on one side of the bridge pier, and each instrument platform is equipped with a first total station on its top. The multiple reference platforms are spaced apart between the instrument platforms and the bridge pier, and each reference platform is equipped with a first target on its top. Each bridge pier is equipped with a second total station on its top. The reference elevation of the reference platform is measured using the first total station of two adjacent instrument platforms and the first target of one reference platform. Based on the reference elevation of the two reference platforms, the elevation of the bridge pier is measured using the second total station of one bridge pier and the first targets of the two adjacent reference platforms. By setting up multiple reference platforms and multiple instrument platforms to perform measurements together, the number of instrument platforms set up in the sea is reduced, the construction period is shortened, and the measurement cost is reduced.

The invention provides a porous composite sleeve inflatable hose collaborative noise reduction device and method suitable for offshore wind power pile sinking operation, and belongs to the technical field of ocean engineering noise control, the porous composite sleeve inflatable hose collaborative noise reduction device comprises a porous composite sleeve base body, and the porous composite sleeve base body is formed by compounding an inner metal rigid material layer and an outer elastic sound absorption material layer; conical through holes which are uniformly arranged in a penetrating manner are formed in the porous composite sleeve base body; an inflation hose system is fixed to the outer portion of the porous composite sleeve base body in a spiral winding mode through a buckle, the inflation hose system covers outlets of all the conical through holes and is communicated with the outlets of all the conical through holes, and a pressure relief valve is installed on the inflation hose system. According to the device, through the synergistic effect of multiple mechanisms of sound reflection, friction damping, viscoelastic energy dissipation and pneumatic pressure relief, the purpose of efficient noise reduction of offshore piling operation is achieved. The method is suitable for underwater impact noise control scenes such as offshore wind power pile foundations and sea-crossing bridges, has an obvious noise reduction effect on the offshore piling operation, and remarkably reduces the noise environmental pollution of the offshore piling operation.

The present invention discloses a method and system for evaluating the wind-induced vibration performance of an ultra-large-span sea-crossing bridge in a strong typhoon sea area. The method comprises: obtaining bridge information and typhoon information, wherein the bridge information comprises: an effective cross-sectional area of the bridge, a natural frequency of the bridge structure, a mass of the bridge, a stiffness of the bridge structure, a natural frequency of the bridge structure and a damping ratio of the bridge structure, and the typhoon information comprises: a wind direction, a wind speed component, a wind speed and a frequency of the typhoon; setting a bridge wind load index simulation model, calculating the wind load index received by the bridge in a strong typhoon sea area at different times, performing three-dimensional modeling on the bridge, and performing wind field simulation, using the wind load index as a parameter to test the wind-induced vibration performance of the bridge; adjusting the wind load index so that the bridge performs wind field simulation under different wind load indices, thereby completing the wind-induced vibration performance evaluation of the bridge.

The application discloses a kind of seabed suspension tunnel inertial damper, it is related to cross-sea traffic technical field;Including acceleration type inertial container, it is located between the lane layer of tunnel pipe body and mass block;Through the gear transmission system inside acceleration type inertial container, the inertia force transmission of tunnel pipe body and mass block is realized, and the inertia force equivalent mass block partial mass.By acceleration type inertial container, inertia force transmission of tunnel pipe body is realized to this damper, to replace partial mass block mass, and then reduce the overall mass and volume of damper, avoid the influence caused by large mass block to tunnel pipe body.