CN-116907568-B - Device and method for monitoring anchor chain tension of floating fan mooring system

Abstract

The invention relates to a device and a method for monitoring anchor chain tension of a floating type fan mooring system, and belongs to the technical field of floating type ocean engineering structures. The problems of large direct measurement error and high underwater measurement cost in the prior art are solved. The intelligent control room comprises an inclinometer, a signal acquisition communication board, a signal processor, a central control room host, a display and a strain sensor, wherein the strain sensor and the inclinometer are electrically connected with the signal acquisition communication board, and the signal acquisition communication board, the signal processor, the central control room host and the display are electrically connected in sequence. The invention has simple structure, convenient installation and use and easy maintenance, can carry out integral replacement if faults occur, saves cost, realizes the comprehensive monitoring of the tension and the inclination angle movement change of the anchor chain, and has small error.

Inventors

• LIU HONGBING
• CHEN ZHIXIANG
• TIAN WEI
• QU XIANQIANG
• ZHAO CHUANYANG
• ZHANG MENG
• XIE YAOGUO

Assignees

• 烟台哈尔滨工程大学研究院

Dates

Publication Date

20260508

Application Date

20230522

Claims (4)

1. 1. The method for monitoring the anchor chain tension of the floating type fan mooring system is characterized by comprising a device for monitoring the anchor chain tension of the floating type fan mooring system, wherein the device comprises an inclinometer (3), a signal acquisition communication board (6), a signal processor (11), a central control room host (12), a display instrument (13) and a strain sensor (14), the inclinometer (3) are electrically connected with the signal acquisition communication board (6), and the signal acquisition communication board (6), the signal processor (11), the central control room host (12) and the display instrument (13) are electrically connected in sequence; The novel hydraulic chain tensioner comprises a chain stopper (1), a chain stopper (2), a tensioner (4), a chain stopper (5), a pontoon (8) and a platform (9), wherein one end of the chain stopper (2) is connected with the chain stopper (5) through the tensioner (4), the chain stopper (5) is fixedly connected with the platform (9), a pulley of the tensioner (4) is tightly pressed against the chain stopper (2), a strain sensor (14) is arranged near the tensioner (4), an inclinometer (3) is arranged below the tensioner (4), the inclinometer (3) is connected with the chain stopper (2), and the pontoon (8) is arranged at the lower part of the platform (9); the method comprises the following steps: step one, establishing a tensioner (4) and a base local finite element analysis model; Step one, a tensioner (4), a base and an anchor chain model are established, a unit pressure load P is applied at the contact position of a pulley of the tensioner (4) and the anchor chain (2), the bearing condition of the tensioner (4) and the base is analyzed, the characteristics of the tensioner (4) and a load transmission path are analyzed, a response value X at a measuring point position is obtained, and then a load transmission rigidity matrix K is obtained through calibration; , ; step two, constructing a measuring point response matrix based on the finite element simulation result; In the second step, based on the finite element simulation result, a region with larger stress is screened on the base of the tensioner (4), the real-time change condition of stress and strain is monitored through a strain sensor (14), and a measuring point response matrix is built ; Calculating the pressure at the contact position of the anchor chain (2) and the pulley of the tensioner (4); in the third step, a response matrix is monitored according to the load transfer rigidity matrix K and the measuring points Calculating the pressure at the contact position of the anchor chain (2) and the pulley of the tensioner (4) ; ; Step four, monitoring the inclination angle change of the anchor chain (2) at the lower part of the tensioner (4) in real time through an inclinometer (3) to obtain the real-time change condition of the inclination angle alpha; step five, calculating the tension of the anchor chain (2); step five, calculating the real-time change condition of the tension of the anchor chain (2) according to the physical relationship; , ; , ; Wherein a is the included angle between the anchor chain (2) and the vertical direction, T 2 is the tension at the upper end of the anchor chain (2), T 1 is the tension at the lower end of the anchor chain (2), and F is 。
2. 2. A method for monitoring the chain tension of a floating wind turbine mooring system according to claim 1, characterized in that three tensioners (4) are arranged in a circumferential array at the edge of the platform (9), one chain (2) is connected to each tensioner (4), the chain (2) is a steel catenary, and three signal acquisition communication boards (6) are connected to the platform (9).
3. 3. A method for monitoring the chain tension of a floating wind turbine mooring system according to claim 2, wherein an inclinometer (3) is mounted on the chain (2), said inclinometer (3) employing a MEMS biaxial inclination sensor of 0.030.
4. 4. A method for monitoring the anchor chain tension of a floating wind turbine mooring system according to claim 1, wherein the tensioners (4) are made of seawater corrosion resistant materials, the cables (7) are made of special ship cables, the cables are prevented from penetrating through unsafe areas of the floating wind turbine platform (9) during installation and arrangement, the sockets are inserted in an aviation of waterproof grade IP67 for preventing corrosion and faults of electronic elements, and watertight pressure-bearing protective shells are arranged outside the inclinometers (3) and the strain sensors (14).

Description

Device and method for monitoring anchor chain tension of floating fan mooring system Technical Field The invention relates to a device and a method for monitoring anchor chain tension, belonging to the technical field of floating ocean engineering structures. Background In recent years, the floating type fan technology plays an increasingly important role in the development and utilization of new energy sources at sea, and a mooring anchor chain is used as an indispensable equipment facility of the floating type fan platform, is connected with the floating type fan platform and is used for transmitting and buffering external force born by the floating type fan platform, so that the reliability and the safety of work of the floating type fan platform are of great significance to the normal operation of the floating type fan platform. Because the mooring system is immersed in the seawater for a long time, the risk of seawater corrosion is faced, the mooring system is continuously subjected to various environmental loads such as wind and wave currents, and the like, in the actual operation of the mooring system in the floating type fan platform, the mooring anchor chain is easy to have the condition of abnormal tension, and once the mooring anchor chain is stressed and overloaded and broken, the mooring anchor chain can cause great potential threat to the production safety of the floating type fan platform. Therefore, the monitoring and the reliability assessment of the mooring chain tension of the floating fan platform have strategic significance. The following problems exist in the prior art: 1. The existing method for monitoring the mooring anchor chain is characterized in that the mooring monitoring is directly measured through the top end of a floating fan platform, namely, a pin roll sensor is arranged at the top end of the floating fan platform to directly measure the tension of the mooring anchor chain, and the method has larger error; 2. The existing method for monitoring the mooring anchor chain utilizes a developed special sensor to carry out structural measurement on a floating fan platform mooring system through underwater measurement, but an auxiliary clamp is required to be installed, and has high requirements on installation accuracy and high cost. Accordingly, there is a need for an apparatus and method for monitoring the chain tension of a floating wind turbine mooring system that solves the above-mentioned problems. Disclosure of Invention The present invention addresses the shortcomings of the four rotor Mars aircraft described above by providing an apparatus and method for monitoring the chain tension of a floating wind turbine mooring system, a brief overview of which is provided hereinafter in order to provide a basic understanding of certain aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. The technical scheme of the invention is as follows: the utility model provides a device for monitoring floating fan mooring system anchor chain tension, includes inclinometer, signal acquisition communication board, signal processor, central control room host computer, display instrument and strain sensor, inclinometer and signal acquisition communication board electric connection, signal acquisition communication board, signal processor, central control room host computer, display instrument electric connection in order. The device is characterized by further comprising an anchor, an anchor chain, a tensioner, a chain stopper, a buoy and a platform, wherein one end of the anchor chain is connected with the anchor, the other end of the anchor chain is connected with the chain stopper through the tensioner, the chain stopper is fixedly connected with the platform, a pulley of the tensioner presses the anchor chain, a strain sensor is arranged near the tensioner, an inclinometer is arranged below the tensioner, the inclinometer is connected with the anchor chain, and the buoy is arranged at the lower part of the platform. Preferably, three tensioners are arranged on the circumferential array of the edge of the platform, each tensioner is correspondingly connected with an anchor chain, the anchor chains are steel suspension chains, and three signal acquisition communication plates are connected with the platform. Preferably, the inclinometer is mounted on the anchor chain, and the inclinometer adopts a MEMS biaxial inclination sensor of 0.030. The tensioner is preferably made of seawater corrosion resistant materials, the cable is a special ship cable, the cable is prevented from penetrating through an unsafe area of the floating fan platform during installation and arrangement, and in order to avoid corrosion and failure of electronic elements, the socket is an aviation socket with waterproof grade IP67, and the inclinome