29 results about "Tidal range" patented technology

The invention provides a floating photovoltaic split mooring platform, and belongs to the technical field of ocean engineering. The platform mainly comprises at least one floating body, and the floating body is provided with a first floating frame and a second floating frame. Wherein a photovoltaic panel is mounted on the first floating frame; the first floating frame is in sliding connection with the second floating frame, and a damper is arranged between the first floating frame and the second floating frame; and the second floating frame is connected with the berth. The floating body is designed to be of a split type structure, through sliding connection, heaving displacement generated by tide level changes is absorbed by the first floating frame in a self-adaptive mode, the stress state of the second floating frame is not obviously changed, tidal range input is prevented from directly acting on the whole, then forced coupling of the tidal range to the mooring system is weakened, and the mooring effect is improved. The mooring peak tension and the cyclic fatigue risk are obviously reduced; furthermore, the second floating frame can be moored and deloaded through the split design, safety protection is enhanced, and the safety, reliability and applicability of the platform in a large-tidal-range shallow sea area are remarkably improved.

The present application relates to the technical field of material performance testing, and discloses a material corrosion testing device and testing method for simulating ocean acidification environment, comprising: a closed simulation testing cabin, which is internally divided into a top-down salt mist simulation cabin, a wet heat simulation cabin and a high-pressure immersion simulation cabin by horizontally arranging openable and closable upper and lower insulation boards, and is provided with a cabin door with a sealing structure at the top; through the independent modular design of the salt mist simulation cabin, the wet heat simulation cabin and the high-pressure immersion simulation cabin, and the automatic switching function of the rotatable lifting sample holder, the present device realizes precise coupling and seamless switching of corrosion environments such as salt mist spraying, high temperature and high humidity, and deep sea high pressure, and the sample can complete the whole cycle corrosion behavior research of the marine atmospheric zone, the splash zone, the tidal zone and the full immersion zone on the same platform, and eliminates the interface effect caused by the traditional multiple equipment series connection testing.

The invention provides a method for quantifying tidal non-stationarity, and belongs to the technical field of natural science research based on nonlinear data analysis. Firstly, hour-by-hour tide observation data with the observation duration not less than one month in a target sea area are obtained; separating non-tidal low-frequency and high-frequency tidal changes in the data by using an empirical mode decomposition method, and extracting a tidal component; returning the tide component through a classical harmonic analysis CHA model to obtain CHA return tide; then calculating a correlation coefficient, a mean absolute error and a root-mean-square error of the tidal component and the CHA, and respectively dividing the mean absolute error and the root-mean-square error by an average value of the observation absolute values to obtain a normalized index; finally, (1, 0, 0) is used as a reference point, (CC, NMAE, NRMSE) is used as an observation point, and the tidal non-stationarity index NS is calculated according to a two-point distance formula. The device can be widely applied to global sea areas and is suitable for sea areas of different tide types and sea areas of different tidal ranges.

The application discloses a kind of tidal river network sluice operation data model processing method, system and terminal, it is related to sluice operation analysis technical field, and its technical scheme main points are: initial outer river tidal level is carried out noise reduction pretreatment, and sliding average is carried out;Select the smooth result of the highest matching degree of rising and falling tide trend, and carry out abnormal fluctuation elimination processing;The rising and falling tide trend in standard smooth result is analyzed;Rising and falling tide trend result and water level difference threshold are loaded in Infoworks RTC module;Different water level difference threshold is tried, and the optimal water level difference threshold of sluice opening and closing is determined, to obtain final Infoworks RTC module.The application is carried out to the smooth processing of outer river tidal level data, and the outer river tidal drop process is judged, according to the inner and outer river tidal difference to control the opening and closing of sluice, reach water quality model operation working condition and actual engineering working condition consistent, provide strong support for later water power water quality model rating.

A concave hermetic air / brine encapsulating vessel, or cap 10, positioned in the sea at a chosen area according to tidal range. Wherein the open underside of the vessel allows brine / sea water to freely enter or exit the vessel and the tide rises and falls respectively. This rise and fall of the brine within the vessel will result in changes to the air pressure within the vessel, as the air because pressurised as the brine rises, and forms a vacuum with the vessel as the brine falls. These changes in pressure are used to operate a pneumatic actuator 60, via a suitable system of valves 50,52 coupled to the inlets and / or outlets of a pipe couple to a vent 30 on the upper portion of the vessel, or within a plurality of pipes couple to a manifold 40 coupled to the vent 30. Wherein the operation of the pneumatic actuator 60 powers a generator 62 for producing and storing power.

This invention relates to a smart forecasting method for saltwater intrusion in the Yangtze River Estuary based on multi-source data fusion and machine learning. The method includes: acquiring hydrological monitoring data, including flow rate, tidal level, wind vector, and reservoir salinity; constructing an input feature set by performing physical feature derivation processing on the data: calculating tidal range features based on tidal level to characterize tidal dynamics, calculating regional average features based on wind vector to characterize wind field driving, and performing phase correction on the flow rate data according to the runoff-salinity lag relationship; combining the above-mentioned derived features with basic tidal level features and historical salinity features, and inputting them into a pre-trained neural network model. This model uses a bidirectional long short-term memory network layer to capture temporal dependencies and utilizes a multi-head attention mechanism layer to dynamically focus on key information, outputting the future salinity prediction value of the target reservoir. This invention can ensure rapid response and high computational efficiency while possessing excellent prediction accuracy and stability, and ensuring that the prediction results conform to hydrophysical laws.

The invention relates to the technical field of corrosion tests and equipment, in particular to a tidal range natural acceleration device and a test method.Seawater liquid level changes are monitored in real time through a liquid level sensor, the natural rising tide frequency a and falling tide frequency b of the previous day are obtained, a sample frame is controlled to execute up-down reciprocating motion at N times of frequency, and N is the acceleration rate; and after a plurality of test periods, respectively measuring the corrosion rates of the accelerated test and the naturally exposed sample, calculating the acceleration ratio, and constructing a gray prediction model based on the relationship between the acceleration ratio and time for extrapolating and predicting the natural corrosion behavior of the material in a longer period. According to the invention, a mechanical lifting system capable of being accurately controlled is constructed in a natural seawater tidal range region, so that the frequency of a material drying and wetting alternation process is enhanced, and the corrosion process is obviously accelerated on the premise of not changing the authenticity of a marine environment; the double problems that a traditional indoor acceleration test is poor in correlation with the actual service environment and the natural exposure test period is too long are solved.

This invention discloses a method for estimating long-duration design tidal process lines, comprising: preprocessing and frequency analysis of historical tidal data to obtain the design high tide level, design flood tide range, and design ebb tide range; selecting a typical long-duration tidal process containing the highest tide level, and selecting a "one flood, one ebb" process at a later position as the main tidal type according to the principle of "high tide level - long duration - later high tide level", with the rest being secondary tidal types; using the design high tide level, design flood tide range, and design ebb tide range to perform same-frequency combination design on the main tidal type to obtain the design main tidal type process; using the scaling ratio of the corresponding phase points of the design main tidal type and the measured main tidal type as a benchmark, scaling the secondary tidal types accordingly to obtain the design secondary tidal type processes; and splicing the results to obtain the complete long-duration design tidal process. This invention overcomes the limitation of existing methods that can only deduce "one flood, one ebb" processes and is applicable to the calculation of any long-duration design tidal process.

The invention relates to a large tidal range strong back-silting sea area steel pipe pile construction method based on harbor basin desilting, which comprises the following steps: S1, arranging a plurality of harbor basins at the upstream of a bridge along the axis direction of the bridge, and enabling the water depth of the tide level where the harbor basins are located to be not lower than a first preset value through desilting; s2, the pile driving barge sails to the position of the harbor basin and is anchored and positioned; s3, when the tide level is lowered to be lower than the first tide level, the pile driving barge conducts construction preparation operation of the steel pipe piles in the harbor basin; s4, when the tide level rises to be larger than the second tide level, the pile driving barge moves to the target pier, steel pipe piles are inserted and driven, and returning is completed and the pile driving barge stops in the harbor basin before the tide level is lowered to be lower than the first tide level; and S5, according to the tide period, the pile driving barge is moved, and the step S3 and the step S4 are repeated till construction of all the steel pipe piles on the upstream of the bridge is completed. A harbor basin point is used as a construction operation preparation area, so that the back-and-forth navigation time between a construction area and an anchoring ground caused by insufficient tide level is effectively shortened, and the pile pitching efficiency is improved.

The invention discloses a sacrificial anode device of a steel structure and a preparation method thereof, the sacrificial anode device comprises a fixing device, a plurality of sacrificial anodes and a filler, the fixing device is arranged on the outer side of the steel structure, the plurality of sacrificial anodes are arranged between the fixing device and the steel structure, and the filler is suitable for filling the peripheral sides of the plurality of sacrificial anodes. The sacrificial anodes are connected to the steel structure through wires, and the sacrificial anodes are formed by wrapping active metal in long-acting activation mortar. According to the method, the problem that traditional coating protection, underwater sacrificial anode protection and impressed current cathode protection cannot fully protect the steel structure in a tidal range zone and a splash zone can be effectively solved.

The application discloses a design water level calculation method and device for an unobserved sea area. The method comprises the following steps: acquiring measured data of a marine station adjacent to a target unobserved sea area, wherein the measured data of the marine station comprises a measured mean tidal range and a measured design water level; constructing a correction formula according to the measured data of the marine station, wherein the correction formula comprises a corresponding relationship between the mean tidal range and the design water level; training a numerical model with a tide level simulation function by using the measured data of the marine station to obtain a calibration model; calculating a simulated mean tidal range by using the calibration model; and obtaining a design water level of the target sea area according to the simulated mean tidal range and the correction formula. The design water level calculation method and device for the unobserved sea area can accurately calculate the design water level of the unobserved sea area, and have high flexibility and applicability, and can adapt to different sea area engineering layout requirements.

This invention relates to the field of testing equipment technology, specifically to a stainless steel corrosion performance testing equipment for a full-zone simulated seawater environment. The equipment includes: a test chamber, which is vertically arranged along the interior of the chamber via multiple partitions, sequentially from top to bottom, comprising an atmospheric test zone, a splash test zone, a tidal range test zone, a full immersion test zone, and a sea mud test zone; and a simulation unit, including a sea breeze simulation component and a wave simulation component respectively connected and installed on the side wall of the test chamber, for providing a simulated seawater environment. By separately setting the atmospheric test zone, splash test zone, tidal range test zone, full immersion test zone, and sea mud test zone inside the test chamber, the equipment can work with the sea breeze simulation component and the wave simulation component to simulate a full-zone seawater environment. This allows for convenient testing of the corrosion resistance of stainless steel pipes in different zones of a simulated real marine environment, improving the accuracy of the test, reducing the manpower and material resources consumed in the test, and reducing the workload of the personnel involved in the test.

The invention belongs to the field of marine antifouling, and particularly relates to a composite material (CeO2-MOF / C) with halogenated peroxide mimic enzyme catalytic activity and preparation and application thereof. The specific method comprises the following steps: adding activated carbon black into a CeO2-MOF precursor, and calcining an obtained sample in a muffle furnace at 350 DEG C for 2 hours to prepare a CeO2-MOF / C composite material; wherein the precursor of the CeO2-MOF is 4, 4-diphenyldicarboxylic acid and ceric ammonium nitrate; the mass ratio of the precursor 4, 4-diphenyldicarboxylic acid to the ceric ammonium nitrate is 1: (1-1.5). The antifouling coating is constructed on the basis of cerium-based halogenated peroxide bionic enzyme, the prepared antifouling coating is used for antifouling application in real sea environments, and the real sea environments comprise a sea total immersion zone and a tidal range zone. The antifouling coating has no pollution to the marine environment, is green and environment-friendly, and has a wide application prospect in marine fouling protection.

The invention discloses an overall rapid construction method for a pouring jacket cofferdam under the condition of a strong tidal range sea area, which comprises the following steps: building a construction platform, and inserting and hitting a steel casing and a positioning column on a riverbed; a single-wall steel cofferdam is built on the construction platform, and limiting profile steel corresponding to the positioning columns is arranged on the periphery of the single-wall steel cofferdam; the single-wall steel cofferdam is lowered, and meanwhile, the limiting profile steel penetrates through the positioning columns till the single-wall steel cofferdam falls to a riverbed; pushing mechanisms are arranged on the positioning columns, and the single-wall steel cofferdam is pushed downwards through the pushing mechanisms until the single-wall steel cofferdam reaches the preset depth; desilting, bottom sealing concrete pouring and water pumping are conducted on the interior of the single-wall steel cofferdam; pier construction is conducted; hoisting mechanisms are installed on the positioning columns to lift the single-wall steel cofferdam until the single-wall steel cofferdam is separated from the riverbed; and the single-wall steel cofferdam is integrally hoisted and then dismantled. Compared with the prior art, the stability of the single-wall steel cofferdam under the high-tidal-range and high-storm sea condition environment condition is improved through the positioning columns.

The invention discloses a method for protecting a tidal range area of an in-service coastal wharf concrete structure, and belongs to the technical field of corrosion prevention of the tidal range area concrete structure, a rapid construction process and a high-performance coating material are adopted, and closed prime coat solvent-free moisture-curing epoxy sealing paint (Genecoat 970FD) of a coating supporting system has excellent alkali resistance and permeability, and is not prone to falling off, so that the service life of the coating supporting system is prolonged, and the service life of the coating supporting system is prolonged. The surface coating material low-surface treatment moisture-curing wear-resistant epoxy coating (Genecoat946) has good weather resistance, and the whole coating supporting system has excellent resistance to permeation of corrosion factors such as chloride ions, has compatibility, has certain toughness and can adapt to deformation of concrete.

This utility model discloses a garbage transfer platform for fishing port operation areas, including a support platform fixed to the quay or wharf and a lifting and conveying device on one side. The lifting and conveying device includes a support tray, a lifting guide structure, and a drive assembly consisting of a lead screw and a servo motor. The drive assembly moves the tray up and down between positions above and below the platform's working surface, and is controlled by a control system to stop at a preset position. The lifting guide structure consists of parallel vertical guide rails and a slider assembly. An anti-fall locking mechanism is provided at the lower end of the lead screw. Adjustable positioning blocks and locking claws are provided on the tray to secure garbage containers. The platform is composed of uprights, main beams, and secondary beams. The panel is detachable, and a perimeter fence is provided. The outer surface is covered with a corrosion-resistant layer or anti-corrosion coating, adapting to the tidal range of fishing ports and enabling efficient and safe garbage transfer.

The utility model provides an in-situ electrochemical monitoring experimental device for simulating corrosion of an ocean tidal range zone, which comprises a water storage tank, an experimental water tank, a first water pipe, a first flow meter, a first diaphragm pump, a second water pipe, a second flow meter, a second diaphragm pump, a sample fixing frame and an electrochemical test fixing frame for mounting a plurality of electrochemical probes for simulating different tide levels, the two ends of the first water pipe are connected with the water storage tank and the experiment water tank in a one-to-one correspondence mode, the two ends of the second water pipe are connected with the water storage tank and the experiment water tank in a one-to-one correspondence mode, and the first flow meter and the first diaphragm pump are installed on the first water pipe. The first flow meter and the first diaphragm pump are installed on the first water pipe, the second flow meter and the second diaphragm pump are installed on the second water pipe, the sample fixing frame is installed in the experiment water tank, the electrochemical test fixing frame is installed in the experiment water tank in a sliding mode, and the sample fixing frame is located on the motion trail of the electrochemical test fixing frame.

The invention relates to a method for enabling a whole ship to go ashore through an air bag. The method comprises the following steps that the ship is placed on a slipway with the natural tide level difference and the gradient ratio ranging from 1: 20 to 1: 30; after ebb tide, a plurality of air bags are laid on the berth in the advancing direction of the ship, air in the air bags is completely emptied, and a plurality of sand bags are placed and fixed; mounting a positioning tool with a water gauge; after the tide rises, the ship is berthed and positioned through a tug, then the two winches on the left side and the right side on the shore are synchronously operated to tighten the mooring rope, and the whole ship to be ashore is located over the air bag; after the tide water retreats to a certain position, the air bag is inflated and dragged by the winch, and the ship is moved to a preset position at the high position of the slipway in this way; buttresses are placed at the bottom of the ship, after the ship is horizontally stabilized, the air bags begin to be deflated, the ship body is located on the buttresses, the air bags are taken out, and the ship landing process is completed. Underwater disassembly is not needed, and the operation efficiency and safety are remarkably improved.

The application provides a construction method of a steel pipe concrete composite inclined pile in a large-tidal-range river environment, and belongs to the technical field of bridge construction. The method comprises a support frame, an adjusting mechanism and an inner support mechanism. The support frame is in the form of an equilateral triangular frame. The inner support mechanism is arranged on the end face of each corner of the support frame and is used for supporting a reinforcing ring of a reinforcement cage to prevent the reinforcement cage from being deformed under pressure. The support frame in the form of an equilateral triangular frame can evenly distribute the pressure received by the inner support mechanism, thereby improving the supporting strength of the inner support mechanism and avoiding the deformation of the reinforcement cage and the reinforcing ring of the reinforcement cage under pressure. The adjusting mechanism arranged in the support frame can be positionally locked, thereby facilitating the change of the direction of the inner support mechanism and the disassembly of the entire device.

The invention provides an imidazoline epoxy resin curing agent. The imidazoline epoxy resin curing agent is prepared from the following components in parts by weight: 40-70 parts of an imidazoline monomer, 5-15 parts of fluorine-containing long-chain carboxylic acid, 10-25 parts of polyether amine, 5-15 parts of a polyfunctional epoxy compound, 1-5 parts of a silane coupling agent and 0.1-1 part of a polymerization inhibitor. The curing agent is suitable for various underwater working conditions with the water depth of 0.5-20 m, the water temperature of 5-35 DEG C and the water flow speed of 0-2 m / s, has wide application prospects in underwater concrete repairing, tidal range zone anti-corrosion coating, maritime work structure grouting, submarine pipeline repairing, reservoir dam reinforcing and other scenes, and has great significance in promoting ocean engineering and water conservancy facility maintenance technology progress.

The invention discloses high-corrosion-resistance marine Portland cement and a preparation method thereof, and relates to the technical field of marine engineering building materials. The self-repairing cement comprises the following components in parts by weight: 70-80 parts of Portland cement clinker, 10-15 parts of superfine slag powder, 5-10 parts of silica fume, 2-4 parts of a double-response self-repairing capsule, 1.5-3 parts of a difunctional nano composite material, 0.5-1.5 parts of a bio-based loaded inorganic matter synergistic mineralizer, 3-5 parts of gypsum and 0.02-0.05 part of triethanolamine. The preparation method comprises the following steps: drying the raw materials, co-grinding, adding the three functional components, and uniformly mixing. Through the synergistic effect of the three functional components, the cement has excellent chloride ion erosion resistance and sulfate corrosion resistance, intelligent self-repairing of cracks can be achieved, and the durability of marine concrete in tidal range, total immersion and sea mud areas is remarkably improved.

The invention relates to a tidal estuary salinity forecasting method and system. The method comprises the following steps: collecting monitoring data of a river; assuming future runoff conditions, and forecasting the day-by-day maximum tidal range and the highest tide level of an estuary control station in a future time period through an estuary salt tide invasion numerical model; dividing the collected data; performing normalization processing on the training data; creating a salinity prediction model based on the inverse transmission neural network; analyzing an influence rule of upstream runoff and open sea tidal changes on estuary salinity, and selecting a plurality of input factor combinations; training the salinity prediction model, and determining an optimal input factor combination; and forecasting the future daily maximum chlorine content of the estuary control station. The method has the advantages that the input factors of the prediction model are scientifically reconstructed and optimized, and a complex hydrodynamic process is converted into quantized signals which can be understood by the model, so that the advantages of the BP neural network are brought into full play, and the problem of insufficient prediction precision caused by improper selection of the input factors in the prior art is solved.

The invention relates to the technical field of shore-connected unloading platforms, in particular to a shore-connected unloading platform, a channel and an erection method, the shore-connected unloading platform comprises a platform main body, a supporting device, a lifting platform and a lifting device, and a ballast water system is arranged in the platform main body; the supporting device is used for abutting against a seabed to support the platform body. The lifting table is arranged on the platform body in a lifting mode through a lifting device. A first cargo passing space is formed in the lifting table, and a second cargo passing space can be formed between the lifting table and the platform body. Lifting of the lifting table is achieved through the lifting device so as to adapt to different waterline heights, the second cargo passing space can be formed between the lifting table and the platform body, when the waterline is low, the platform body is higher than the waterline, and at the moment, the first cargo passing space and the second cargo passing space are not affected by stormy waves and can pass through operation; the double-pass conveying of goods is achieved, the unloading space of the goods is increased, the unloading efficiency is improved, and the double-pass conveying device can adapt to high tidal range changes.

The invention discloses a flexible safety frame column type deepwater aquaculture net cage, belongs to the technical field of deepwater mariculture equipment, and solves the technical problems that a traditional deepwater net cage is easily fatigued and fractured due to rigid connection, the aquaculture space is unstable, and no safety redundancy exists. The net cage comprises a frame column assembly, a bottom connecting assembly, a seabed fixing pile and a net bag assembly. The frame column assembly is composed of a plurality of closed vertical floating pipe stand columns which are evenly distributed in the circumferential direction and keeps a fixed vertical posture, the bottom connecting assembly is provided with a flexible rubber flexible connector and a built-in safety mooring chain, the safety mooring chain is tensioned and bears force when the safety mooring chain is loosened in the normal state and the flexible connector loses efficacy, and overall anchoring is achieved through a seabed fixing pile. The net bag assembly and the stand columns are hung in a multi-point mode to form a stable breeding space. Through flexible unloading and a double-safety structure, the wind wave resistance and the fatigue resistance are improved, the device is suitable for large-water-depth, large-tidal-range and strong-ocean-current sea areas, the culture space is stable, the service life is long, and the structure can be kept complete under the conditions of 12-level typhoons and the wave height of 5 m.

The invention relates to the technical field of wave power generation, in particular to a tidal range self-adjusting type wave power generation device. The power generation unit comprises a power generation unit and a traction component; the two ends of the traction component are connected with the suspension balance weight unit and the bottom sinking unit respectively. When the tidal range changes, the power generation unit and the traction component enter a power generation waiting state, the floating body drives the suspension counterweight unit to move up and down synchronously, the power generation device reaches a balanced state, the power generation unit and the traction component are promoted to enter a power generation state, and mechanical energy generated when the floating body moves up and down along with waves is converted into electric energy. According to the invention, through the suspension counterweight unit, the traction component is kept in a proper tensioning state under different tidal range conditions, and can automatically adapt to rising and falling of tidal ranges without an additional mechanical adjusting mechanism, so that the problems of power generation efficiency reduction and structural fatigue caused by traction relaxation or excessive stretching in a traditional device are effectively avoided.

The application discloses a kind of semi-submersible drilling platform tidal difference monitoring systems, including laser ranging device, roof, the distance of relative seabed mud surface remains unchanged support ring, and with the data acquisition processing system of laser ranging device connection, laser ranging device is connected in roof bottom, the lifting device is connected in roof bottom, support ring is fixedly connected on the outer circumferential surface of the lifting device, laser emitted by laser ranging device is vertically irradiated on the top surface of support ring.The application carries out ranging by laser measuring point, improves the accuracy of tidal difference measurement, and can also continuously monitor and record ranging data during drilling operation in data acquisition processing system, provides reliable basis and conditions for tidal difference analysis required by other operation links.

The invention discloses a loose and soft beach revetment spliced row body anchoring beam and a construction method thereof, and relates to the technical field of water conservancy projects. The anchoring beam is formed by splicing a plurality of precast beam sections on a foundation pile through a node connecting structure; l-shaped connecting steel bars are pre-embedded in the two ends of the precast beam section, and positioning grooves and grouting holes are formed in the bottom; the joint structure is composed of L-shaped connecting steel bars which are in butt joint and quick-setting concrete for filling joints. The construction method comprises the steps of prefabricating the beam sections in a factory, sinking and driving the foundation piles in a beach land, hoisting and splicing the beam sections by utilizing a low tide level, pouring quick-setting concrete to consolidate joints, and finally paving the bank protection row body. The main body structure is prefabricated, field operation is rapid, simple and convenient, the problems that the tidal range zone construction window period is short, and traditional cast-in-place concrete is prone to being damaged by tide water are effectively solved, the construction efficiency and the engineering quality are remarkably improved, cost and material waste are reduced, and the method is particularly suitable for soft beach land bank protection engineering.

The application provides a method for quantifying tidal non-stationarity, and belongs to the technical field of natural science research based on nonlinear data analysis; first, obtaining hourly tidal observation data of a target sea area for not less than 1 month; then, separating non-tidal low-frequency and high-frequency tidal changes in the data by using an empirical mode decomposition method to extract tidal components; then, returning the tidal components by a classical harmonic analysis (CHA) model to obtain CHA returned tides; then, calculating the correlation coefficient, mean absolute error and root mean square error of the tidal components and the CHA, and dividing the mean absolute error and the root mean square error by the average value of the observed absolute value respectively to obtain normalized indicators; finally, taking (1, 0, 0) as a reference point and (CC, NMAE, NRMSE) as an observation point, calculating a tidal non-stationarity index (NS) according to a two-point distance formula. The application can be widely applied to global sea areas, and is suitable for different tidal type sea areas and different tidal range sea areas.

The invention relates to the technical field of material performance testing, and discloses a material corrosion testing device and a material corrosion testing method for simulating a marine acidification environment. The interior of the simulation cabin is divided into a salt mist simulation cabin, a damp and hot simulation cabin and a high-pressure soaking simulation cabin from top to bottom through an upper isolation plate and a lower isolation plate which are horizontally arranged and can be opened and closed, and a switch cabin door with a sealing structure is arranged at the top; according to the device, through the independent modular design of the salt mist simulation cabin, the damp and hot simulation cabin and the high-pressure soaking simulation cabin, and in combination with the automatic switching function of the rotatable lifting sample rack, accurate coupling and seamless switching of corrosion environments such as salt mist spraying, high temperature and high humidity, deep sea high pressure and the like are realized; the test sample can be used for completing full-period corrosion behavior research of a marine atmospheric zone, a splash zone, a tidal range zone and a total immersion zone on the same platform, and an interface effect caused by a traditional multi-device series connection test is eliminated.