A wharf ship mooring safety early warning and forecasting method

Abstract

The present application relates to a kind of based on wharf ship mooring safety early warning forecasting method, belong to port safety technical field, a kind of based on wharf ship mooring safety early warning forecasting method, comprising the following steps: obtaining past unbinding information and analyzing unbinding influencing factor;Setting target water area and obtaining the tidal information and weather information of target water area;According to the tidal information and weather information of target water area, calculate ship environmental load;According to ship environmental load, predict ship displacement amount;Set minimum unbinding threshold and cable break value, compare predicted ship displacement amount with minimum unbinding threshold and cable break value and real-time early warning.This application predicts ship displacement amount according to ship environmental load, set minimum unbinding threshold and cable break value, compare predicted ship displacement amount with minimum unbinding threshold and cable break value and real-time early warning, can be combined with real-time monitoring data to unbinding and cable break early warning, reduce the risk of wharf ship unbinding and cable break.

Description

Technical Field

[0001] This invention belongs to the field of port safety technology, specifically relating to a method for early warning and forecasting of ship mooring safety at wharves. Background Technology

[0002] Under conditions of strong winds, waves, currents, and significant ship movement, berths pose a safety hazard of mooring line breakage. The moment a mooring line breaks, a powerful rebound effect occurs, posing a serious safety threat to personnel and facilities in the vicinity, especially in the rebound zone. Furthermore, after a mooring line breaks, the berthed vessel loses its restraints, and under adverse environmental dynamics, it poses a significant threat to the safety of the wharf structure and operating equipment, adjacent berthed vessels, navigation in the harbor basin or channel, and the vessel's own safety. Therefore, monitoring, assessing, and issuing early warnings regarding the movement and operational safety of vessels operating in front of the wharf, reminding personnel to avoid risks, or promptly adjusting mooring lines and vessel attitude to prevent breakage, is of great practical significance for safe berth operations. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, this invention proposes a method for early warning and forecasting of ship mooring safety at docks.

[0004] The specific technical solution of this invention is as follows: A method for early warning and forecasting of ship mooring safety at a wharf, comprising the following steps: acquiring past unmooring information and analyzing unmooring influencing factors; setting a target water area and acquiring tidal current information and meteorological information of the target water area; calculating the ship's environmental load based on the tidal current information and meteorological information of the target water area; predicting the ship's displacement based on the ship's environmental load; setting a minimum unmooring threshold and a mooring breakage value, comparing the predicted ship displacement with the minimum unmooring threshold and the mooring breakage value, and issuing an early warning in real time.

[0005] Furthermore, the method for obtaining past unmooring information and analyzing unmooring influencing factors involves obtaining records of all unmoorings; obtaining wind and current environmental data at the time of unmooring; obtaining the size of surrounding vessels and ship waves at the time of unmooring; obtaining historical flow data of upstream water systems; obtaining historical hydrological measurement data; and analyzing the unmooring influencing factors based on the above data.

[0006] Furthermore, the method for setting the target water area and obtaining tidal and meteorological information of the target water area is as follows: setting the target water area range; building a wind speed station in an open and unobstructed area of ​​the target water area, taking the wind speed value at 10 meters above the average sea level, and obtaining meteorological information in real time through wireless transmission; establishing a shore-based tide level station at the target water area location and correcting the tide level base; establishing a wave and current observation station in a location close to the shore of the target water area and not obstructing navigation, and obtaining tidal information in real time through wireless transmission.

[0007] Furthermore, the method for calculating the ship's environmental load based on the tidal information and meteorological information of the target water area is as follows: calculating the wind load based on the meteorological information of the target water area; calculating the tidal load based on the tidal information of the target water area; and calculating the ship's environmental load based on the wind load and the tidal load.

[0008] Furthermore, the method for calculating wind load based on meteorological information of the target water area involves obtaining the lateral component force coefficient E1 of the wind load through wind tunnel testing; and obtaining the lateral wind-receiving area A. XW (m 2 ); Obtain the lateral component V of the design wind speed. x (m / s); Obtain the wind pressure non-uniformity reduction factor ζ1; Obtain the wind pressure height change correction factor ζ2; Lateral wind load F xw The formula for calculating (kN) is F xw =E1A xw V 2 x ζ1ζ2; The longitudinal component of the wind load E2 was obtained through wind tunnel testing; The longitudinal wind-receiving area A was obtained. yw (m 2 ); Obtain the longitudinal component V of the design wind speed. y (m / s); longitudinal wind load F yw The formula for calculating (kN) is F yw =E2A yw V 2 y ζ1ζ2.

[0009] Furthermore, the method for calculating tidal loads based on tidal information of the target water area involves obtaining the lateral component coefficient C of the hydrodynamic force through a circulating flume test. XC ; Obtain the seawater density P of the target water area C (t / m 3 ); Obtain the average current velocity V within the ship's draft range. C (m / s); Obtain the length L between the ship's perpendiculars BP (m); Obtain the ship's average draft D(m); Obtain the tidal current angle θ C (°); Lateral tidal load F XC The formula for calculating (kN) is F XC =1 / 2C XC P C V C 2 L BP Dsin(θ C The longitudinal component coefficient C of the hydrodynamic force was obtained through harbor basin tests. YC Longitudinal tidal load F YC The formula for calculating (kN) is F YC =1 / 2C YCP C V C 2 L BP Dcos(θ C ).

[0010] Furthermore, the method for calculating the ship's environmental load based on wind load and tidal load is as follows: based on the lateral wind load F... xw (kN) and lateral tidal load F XC Calculate the ship's lateral environmental load F (kN) w (kN), ship lateral environmental load F w The formula for calculating (kN) is F x =F xw +F XC According to the longitudinal wind load F yw (kN) and longitudinal tidal load F YC Calculate the ship's lateral environmental load F (kN) y (kN), ship lateral environmental load F y The formula for calculating (kN) is F y =F yw +F YC .

[0011] Furthermore, the method for predicting ship displacement based on ship environmental load involves obtaining the ship's transverse cable stiffness K. x (kN / m); based on the ship's lateral environmental load F y (kN) and ship transverse cable stiffness K x Calculate the lateral displacement S of the ship (kN / m) x (m), ship's lateral displacement S x The calculation formula is S x =F xw / K x Obtain the longitudinal cable stiffness K of the ship. y (kN / m); based on the ship's longitudinal environmental load F y (kN) and ship longitudinal cable stiffness K y (kN / m), longitudinal displacement S of the ship y The formula for calculating (m) is S y =F y / K y .

[0012] Furthermore, the method of setting a minimum unmooring threshold and a mooring breakage value, and comparing the predicted ship displacement with the minimum unmooring threshold and the mooring breakage value to provide real-time early warning, involves setting a minimum unmooring threshold B. L And cable breakage value B H If the expected lateral displacement S of the ship x Or the longitudinal displacement S of the shipy Above the minimum unbinding threshold B L The early warning terminal equipment alerts relevant personnel through sound, light, and voice; if the ship's lateral displacement S... x Or the longitudinal displacement S of the ship y Higher than cable breakage value B H The early warning terminal equipment uses sound, light, and voice to alert relevant personnel to take effective measures to reduce the risk of cable breakage.

[0013] Furthermore, the early warning terminal includes: a display screen and buzzer set up on-site to send early warning messages through light and sound broadcasts; a mobile app to send early warning messages through a WeChat mini-program app; and a wearable device for locating and alerting dock workers, which integrates positioning and voice broadcasting devices. The device will automatically report personnel location information and integrate and display it in the system. When workers enter a dangerous area, the device will automatically push warning information to them.

[0014] Beneficial effects:

[0015] This application obtains past unmooring information and analyzes the influencing factors of unmooring, sets target waters and obtains tidal and meteorological information for the target waters, calculates the ship's environmental load based on the tidal and meteorological information of the target waters, predicts the ship's displacement based on the ship's environmental load, sets a minimum unmooring threshold and a mooring breakage value, compares the predicted ship displacement with the minimum unmooring threshold and mooring breakage value and provides real-time warnings. It can combine real-time on-site monitoring data to provide early warnings of unmooring and mooring breakage, reducing the risk of ship unmooring and mooring breakage at the dock. Attached Figure Description

[0016] Figure 1 This is a flowchart of the method of the present invention; Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0019] Example: A method for early warning and forecasting of ship mooring safety at a wharf includes the following steps: acquiring past unmooring information and analyzing unmooring influencing factors; setting a target water area and acquiring tidal current and meteorological information of the target water area; calculating the ship's environmental load based on the tidal current and meteorological information of the target water area; predicting the ship's displacement based on the ship's environmental load; setting a minimum unmooring threshold and a mooring breakage value, comparing the predicted ship displacement with the minimum unmooring threshold and the mooring breakage value, and issuing a real-time warning.

[0020] This application obtains past unmooring information and analyzes the influencing factors of unmooring, sets target waters and obtains tidal and meteorological information for the target waters, calculates the ship's environmental load based on the tidal and meteorological information of the target waters, predicts the ship's displacement based on the ship's environmental load, sets a minimum unmooring threshold and a mooring breakage value, compares the predicted ship displacement with the minimum unmooring threshold and mooring breakage value and provides real-time early warning. It can combine real-time on-site monitoring data to provide early warning of unmooring and mooring breakage, reduce the risk of ship unmooring and mooring breakage at the dock, avoid property losses caused by unmooring or mooring breakage, and make ship mooring at the dock safer.

[0021] The method for obtaining past unmooring information and analyzing unmooring influencing factors is as follows: obtaining records of all unmoorings; obtaining wind and current environmental data at the time of unmooring; obtaining the size of surrounding vessels and ship waves at the time of unmooring; obtaining historical flow data of upstream water systems; obtaining historical hydrological measurement data; and analyzing the unmooring influencing factors based on the above data.

[0022] This application obtains historical records of vessel unmooring, wind and current environmental data at the time of unmooring, data on surrounding vessels and ship wave size at the time of unmooring, historical flow data of upstream waterways, and historical hydrological measurement data. Based on the above data, it analyzes the influencing factors of unmooring, making the analyzed factors more comprehensive and accurate, thereby improving the accuracy of prediction.

[0023] The method for setting up a target water area and obtaining tidal and meteorological information of the target water area is as follows: setting the target water area range; building a wind speed station in an open and unobstructed area of ​​the target water area, taking the wind speed value at 10 meters above the average sea level, and obtaining meteorological information in real time through wireless transmission; establishing a shore-based tide level station at the target water area location and correcting the tide level base; establishing a wave and current observation station in a location close to the shore of the target water area and not obstructing navigation, and obtaining tidal information in real time through wireless transmission.

[0024] This application involves constructing a wind speed station in an open, unobstructed area of ​​the target waters, taking the wind speed value at 10 meters above the average sea level, and acquiring meteorological information in real time via wireless transmission. A shore-based tide gauge station is also established in the target waters, and the tide level is corrected. Wave and current observation stations are also established in the target waters, close to the shore and in a location that does not obstruct navigation, and tidal information is acquired in real time via wireless transmission. This allows the wharf to obtain real-time information on the conditions of the surrounding waters, thereby making the prediction of ship displacement more accurate, timely, and reliable.

[0025] The method for calculating the ship's environmental load based on the tidal and meteorological information of the target water area is as follows: calculating the wind load based on the meteorological information of the target water area; calculating the tidal load based on the tidal information of the target water area; and calculating the ship's environmental load based on the wind load and the tidal load.

[0026] The method for calculating wind load based on meteorological information of the target water area is as follows: obtaining the lateral component force coefficient E1 of the wind load through wind tunnel testing; obtaining the lateral wind-receiving area A. XW (m 2 ); Obtain the lateral component V of the design wind speed. x (m / s); Obtain the wind pressure non-uniformity reduction factor ζ1; Obtain the wind pressure height change correction factor ζ2; Lateral wind load F xw The formula for calculating (kN) is F xw =E1A xw V 2 x ζ1ζ2; The longitudinal component of the wind load E2 was obtained through wind tunnel testing; The longitudinal wind-receiving area A was obtained. yw (m 2 ); Obtain the longitudinal component V of the design wind speed. y (m / s); longitudinal wind load F yw The formula for calculating (kN) is F yw =E2A yw V 2 y ζ1ζ2.

[0027] The windward area can be obtained by inputting data from multiple ship types, eliminating the need to repeatedly acquire other data, thereby obtaining the predicted ship displacement for multiple ship types and broadening the scope of application.

[0028] The method for calculating tidal loads based on tidal information of the target water area involves obtaining the transverse component coefficient C of the flow force through a circulating flume test. XC ; Obtain the seawater density P of the target water area C (t / m 3 ); Obtain the average current velocity V within the ship's draft range. C (m / s); Obtain the length L between the ship's perpendiculars BP(m); Obtain the ship's average draft D(m); Obtain the tidal current angle θ C (°); Lateral tidal load F XC The formula for calculating (kN) is F XC =1 / 2C XC P C V C 2 L BP Dsin(θ C The longitudinal component coefficient C of the hydrodynamic force was obtained through harbor basin tests. YC Longitudinal tidal load F YC The formula for calculating (kN) is F YC =1 / 2C YC P C V C 2 L BP Dcos(θ C ).

[0029] The method for calculating the ship's environmental load based on wind load and tidal load is as follows: based on the lateral wind load F... xw (kN) and lateral tidal load F XC Calculate the ship's lateral environmental load F (kN) w (kN), ship lateral environmental load F w The formula for calculating (kN) is F x =F xw +F XC According to the longitudinal wind load F yw (kN) and longitudinal tidal load F YC Calculate the ship's lateral environmental load F (kN) y (kN), ship lateral environmental load F y The formula for calculating (kN) is F y =F yw +F YC .

[0030] The method for predicting ship displacement based on ship environmental load involves obtaining the ship's lateral cable stiffness K. x (kN / m); based on the ship's lateral environmental load F y (kN) and ship transverse cable stiffness K x Calculate the lateral displacement S of the ship (kN / m) x (m), ship's lateral displacement S x The calculation formula is S x =F xw / K x Obtain the longitudinal cable stiffness K of the ship. y (kN / m); based on the ship's longitudinal environmental load F y(kN) and ship longitudinal cable stiffness K y (kN / m), longitudinal displacement S of the ship y The formula for calculating (m) is S y =F y / K y .

[0031] The displacement is inversely proportional to the cable stiffness. When the cable stiffness is constant, the greater the force it is subjected to, the greater the displacement, and the more likely the cable will break.

[0032] The method for setting a minimum unmooring threshold and a mooring breakage value, and comparing the predicted ship displacement with these values ​​for real-time early warning, is as follows: A minimum unmooring threshold B is set. L And cable breakage value B H If the expected lateral displacement S of the ship x Or the longitudinal displacement S of the ship y Above the minimum unbinding threshold B L The early warning terminal equipment alerts relevant personnel through sound, light, and voice; if the ship's lateral displacement S... x Or the longitudinal displacement S of the ship y Higher than cable breakage value B H The early warning terminal equipment uses sound, light, and voice to alert relevant personnel to take effective measures to reduce the risk of cable breakage.

[0033] The early warning terminal includes: a display screen and buzzer set up on site to send early warning messages through light and sound broadcasts; a mobile App to send early warning messages through a WeChat mini-program app; and a wearable device for locating and alerting dock workers, which integrates positioning and voice broadcasting devices. The device will automatically report the location information of the workers and integrate and display it in the system. When workers enter a dangerous area, an early warning message will be automatically pushed to the workers.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for early warning and forecasting of ship mooring safety at a wharf, characterized in that, Includes the following steps: Obtain past information on decoupling and analyze the factors that influence decoupling; Set the target water area and obtain tidal and meteorological information for the target water area; Calculate the ship's environmental load based on tidal and meteorological information of the target waters; Predict ship displacement based on environmental loads; Set minimum unbuckle thresholds and cable breakage values, compare the predicted ship displacement with the minimum unbuckle thresholds and cable breakage values, and issue real-time warnings. The method for obtaining past separation information and analyzing factors influencing separation is as follows: Retrieve records of all instances of disconnection; Obtain wind and current environmental data at the moment of unbinding; Obtain information on surrounding vessels and wave size at the moment of untying; Obtain historical flow data for upstream water systems; Obtain historical hydrological measurement data; Based on the above data, we analyze the factors affecting the disengagement; The method for setting the target water area and obtaining the tidal and meteorological information of the target water area is as follows: Define the target water area; A wind speed station was built in an open, unobstructed area of ​​the target waters to collect the wind speed value at 10 meters above the average sea level and to obtain meteorological information in real time via wireless transmission. Establish shore-based tide gauge stations at the target water area and correct the tide gauge base. Establish wave and current observation stations at locations close to the shore in the target water area that do not obstruct navigation and obtain tidal information in real time via wireless transmission. The method for calculating the ship's environmental load based on tidal and meteorological information of the target water area is as follows: Calculate the wind load based on meteorological information of the target water area; Calculate the tidal load based on the tidal information of the target water area; Calculate the environmental load on the ship based on wind load and tidal load.

2. The method for early warning and forecasting of ship mooring safety at a wharf as described in claim 1, characterized in that, The method for calculating wind load based on meteorological information of the target water area is as follows: The lateral component coefficient of wind load E1 was obtained through wind tunnel testing. Obtain the lateral windward area A XW (m) 2 ); Obtain the lateral component V of the design wind speed x (m / s); Obtain the wind pressure non-uniformity reduction factor ζ1; Obtain the wind pressure height change correction coefficient ζ2; Lateral wind load F xw The formula for calculating (kN) is F xw =E1A xw V 2 x ζ1ζ2; The longitudinal component coefficient of wind load E2 was obtained through wind tunnel testing. Obtain the longitudinal windward area A yw (m) 2 ); Obtain the longitudinal component V of the design wind speed y (m / s); Longitudinal wind load F yw The formula for calculating (kN) is F yw =E2A yw V 2 y ζ1ζ2.

3. The method for early warning and forecasting of ship mooring safety at a wharf as described in claim 1, characterized in that, The method for calculating tidal load based on tidal information of the target water area is as follows: The transverse component coefficient C of the water flow force was obtained through a circulating water tank test. XC ; Obtain the seawater density P of the target water area C (t / m) 3 ); Obtain the average water velocity V within the ship's draft range. C (m / s); Obtain the length L between the ship's perpendiculars BP (m); Obtain the ship's average draft D (m); Obtain the current flow angle θ C (°); Lateral tidal load F XC The formula for calculating (kN) is F XC =½C XC P C V C 2 L BP Dsin(θ) C ); The longitudinal component coefficient of hydrodynamic force C was obtained through harbor basin tests. YC ; Longitudinal Flow Load F YC The formula for calculating (kN) is F YC =½C YC P C V C 2 L BP Dcos(θ) C ).

4. The method for early warning and forecasting of ship mooring safety at a wharf as described in claim 3, characterized in that, The method for calculating the ship's environmental load based on wind load and tidal load is as follows: According to the lateral wind load F xw (kN) and lateral tidal load F XC Calculate the ship's lateral environmental load F (kN) x (kN), ship lateral environmental load F x The formula for calculating (kN) is F x =F xw F XC ; According to the longitudinal wind load F yw (kN) and longitudinal tidal load F YC Calculate the longitudinal environmental load F of the ship (kN). y (kN), longitudinal environmental load of the ship F y The formula for calculating (kN) is F y =F yw F YC .

5. The method for early warning and forecasting of ship mooring safety at a wharf as described in claim 4, characterized in that, The method for predicting ship displacement based on ship environmental load is as follows: Obtain the lateral cable stiffness K of the ship x (kN / m); According to the ship's lateral environmental load F x (kN) and ship transverse cable stiffness K x Calculate the lateral displacement S of the ship (kN / m) x (m), ship's lateral displacement S x The calculation formula is S x = F x / K x ; Obtain the longitudinal cable stiffness K of the ship y (kN / m); According to the ship's longitudinal environmental load F y (kN) and ship longitudinal cable stiffness K y Calculate the longitudinal displacement S of the ship (kN / m) y (m), longitudinal displacement of the ship S y The formula for calculating (m) is S y = F y / K y .

6. The method for early warning and forecasting of ship mooring safety at a wharf as described in claim 5, characterized in that, The method of setting minimum unmooring thresholds and cable breakage values, comparing the predicted ship displacement with these values, and issuing real-time warnings is as follows: Set minimum unbinding threshold B L And cable breakage value B H ; If the ship's lateral displacement S x Or the longitudinal displacement S of the ship y Above the minimum unbinding threshold B L The early warning terminal equipment provides alerts to relevant personnel through sound, light, and voice. If the ship's lateral displacement S x Or the longitudinal displacement S of the ship y Higher than cable breakage value B H The early warning terminal equipment uses sound, light, and voice to alert relevant personnel to take effective measures to reduce the risk of cable breakage.

7. A method for early warning and forecasting of ship mooring safety at a wharf, as described in claim 6, is characterized in that... The early warning terminal includes: Display screens and buzzers were set up on site to send warning messages via light and sound broadcasts. Mobile app, sending alert messages via WeChat mini-program app; Wearable devices used for locating and alerting dock workers integrate positioning and voice broadcasting devices. The devices will automatically report personnel location information and integrate and display it in the system. When workers enter dangerous areas, warning information will be automatically pushed to them.

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