CN116086988A - Umbilical cable bending stiffness testing device and method - Google Patents

Umbilical cable bending stiffness testing device and method Download PDF

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Publication number
CN116086988A
CN116086988A CN202310037609.5A CN202310037609A CN116086988A CN 116086988 A CN116086988 A CN 116086988A CN 202310037609 A CN202310037609 A CN 202310037609A CN 116086988 A CN116086988 A CN 116086988A
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China
Prior art keywords
assembly
umbilical cable
umbilical
guide rail
tested
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CN202310037609.5A
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Chinese (zh)
Inventor
梅文杰
潘文
邱华
宋晓涵
江贞星
刘春风
陶铭豪
姜荣晨
陈莉莎
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Hengtong Submarine Power Cable Co Ltd
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Hengtong Submarine Power Cable Co Ltd
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Priority to CN202310037609.5A priority Critical patent/CN116086988A/en
Publication of CN116086988A publication Critical patent/CN116086988A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0023—Bending
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0278—Thin specimens
    • G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils

Abstract

The invention relates to an umbilical cable bending stiffness testing device and method, comprising a frame body, wherein the frame body comprises a cross beam and a first guide rail assembly arranged along the length direction of the cross beam, a clamping part is arranged on the first guide rail assembly and used for clamping an umbilical cable to be tested, the clamping part is in sliding connection with the first guide rail assembly, and the clamping part comprises a first clamping part and a second clamping part; the driving unit comprises a connecting rod assembly, a second guide rail assembly and a first driving part, wherein the second guide rail assembly is arranged on the cross beam, the length direction of the second guide rail assembly is perpendicular to the length direction of the first guide rail assembly, the connecting rod assembly is in sliding connection with the second guide rail assembly, and the length direction of the connecting rod assembly is parallel to the length direction of the cross beam; the umbilical cable bending stiffness testing device and method can improve the accuracy of testing data, the testing process is simple, labor is saved, and the testing efficiency is further improved.

Description

Umbilical cable bending stiffness testing device and method
Technical Field
The invention relates to the technical field of cable bending stiffness testing, in particular to an umbilical cable bending stiffness testing device and method.
Background
With the increasing demands of society for energy, the exploitation of ocean oil and gas resources is increasingly strong, and therefore, umbilical cables are increasingly applied and popularized. The umbilical cable is formed by combining one or more of cables, optical cables, steel pipes or hoses in a certain mode, so that integrated transmission of different media can be realized. Bending phenomena can occur in the production, laying and operation processes of the umbilical cable, the bending rigidity is an important technical index of the umbilical cable, and the bending rigidity of the umbilical cable determines the bending radius and service life distribution of the umbilical cable under the action of external force in the transportation and construction processes.
The existing device for testing the bending stiffness of the umbilical cable is simpler, the thrust and bending deformation displacement of the umbilical cable are required to be recorded manually, and then measurement and data recording are carried out, however, the existing testing method is easy to produce errors, the testing method is complex, time and labor are wasted, and the accuracy of the testing result is low.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects in the prior art, and the umbilical cable bending stiffness testing device and method are provided, so that the accuracy of test data can be improved, and the testing method is simple, time-saving and labor-saving.
In order to solve the technical problems, the invention provides an umbilical cable bending stiffness testing device, which comprises,
the umbilical cable testing device comprises a frame body, a first guide rail assembly and a second guide rail assembly, wherein the frame body comprises a cross beam and a first guide rail assembly arranged along the length direction of the cross beam, a clamping part is arranged on the first guide rail assembly and used for clamping an umbilical cable to be tested, the clamping part is in sliding connection with the first guide rail assembly, and the clamping part comprises a first clamping part and a second clamping part;
the driving unit comprises a connecting rod assembly, a second guide rail assembly and a first driving part, wherein the second guide rail assembly is arranged on the cross beam, the length direction of the second guide rail assembly is perpendicular to the length direction of the first guide rail assembly, the connecting rod assembly is in sliding connection with the second guide rail assembly, the length direction of the connecting rod assembly is parallel to the length direction of the cross beam, the connecting rod assembly is connected with an umbilical cable to be tested through a traction assembly, the traction assemblies are symmetrically arranged, the first driving part is connected with the middle part of the connecting rod assembly, and the first driving part drives the connecting rod assembly to move along the second guide rail assembly;
the displacement sensor unit is used for measuring displacement along the height direction of the frame body when the umbilical cable to be measured is deformed, one end of the tension sensor is connected with the first driving part, and the other end of the tension sensor is connected with the connecting rod assembly.
Preferably, the connecting rod assembly comprises a fixing plate and a connecting column, the connecting column is mounted on the fixing plate, the traction assembly is connected with the connecting column, and the fixing plate is connected with the first driving part.
Preferably, the first driving part includes a screw lifter and a support base, the screw lifter is disposed on the support base, and the screw lifter is connected with the fixing plate.
Preferably, the first clamping part comprises a first sliding block and a first clamping jaw, the first sliding block is in sliding connection with the first guide rail assembly, the first clamping jaw is installed on the first sliding block, the first clamping jaw clamps the umbilical cable to be tested, and the setting mode of the second clamping part is the same as that of the first clamping part.
Preferably, the traction assembly comprises a traction rope assembly and a fixing assembly, the fixing assembly is movably connected with the umbilical cable to be tested, one end of the traction rope assembly is connected with the fixing assembly, and the other end of the traction rope assembly is connected with the connecting rod assembly.
Preferably, the traction assembly comprises a first traction assembly and a second traction assembly, the first traction assembly and the second traction assembly are symmetrically arranged along the length direction of the umbilical cable to be tested, the first traction assembly comprises a first traction rope and a first fixing piece which are connected with each other, and the second traction assembly comprises a second traction rope and a second fixing piece which are connected with each other.
Preferably, the displacement sensor unit comprises a fixed seat assembly and a displacement sensor assembly, wherein the fixed seat assembly is mounted on the cross beam, and the displacement sensor assembly is mounted on the fixed seat assembly.
Preferably, the displacement sensor assembly comprises a first displacement sensor and a second displacement sensor, wherein the first displacement sensor is positioned in the middle of the umbilical cable to be measured, and the second displacement sensor is positioned at any other position of the umbilical cable to be measured.
The invention also provides a method for testing the bending stiffness of the umbilical cable, which is used for testing the umbilical cable to be tested by using the umbilical cable bending stiffness testing device, and comprises the following steps:
step S1, fixing the end part of an umbilical cable to be tested;
s2, applying the same tensile force F to two position points which are symmetrical along the center on the umbilical cable to be tested, so that the umbilical cable to be tested is bent;
step S3, measuring the magnitude of the tensile force F, measuring the linear distance L1 between the two position points, measuring the linear distance L2 between the two position points and the end part of the umbilical cable to be measured, measuring the displacement H1 of any position point on the umbilical cable to be measured along the tensile force direction, and measuring the maximum displacement H2 of the umbilical cable to be measured along the tensile force direction;
step S4, calculating according to F, L1, L2, H1 and H2 to obtain bending moment and bending curvature, wherein,
the formula for calculating the bending moment is: m=f×l 2 ；
The formula for calculating the bending curvature is:
Figure BDA0004045405010000031
step S5, calculating to obtain bending rigidity according to the bending moment and the bending curvature,
the formula for calculating the bending stiffness is:
Figure BDA0004045405010000032
preferably, the method for applying the tensile force F to the umbilical to be measured at two points along the center of symmetry in step S2 includes:
step S21, connecting the two position points with a connecting rod assembly at the same time, and applying a tensile force f to the connecting rod to bend the umbilical cable to be tested;
step S22, measuring the tensile force F, wherein the tensile force F on two position points along the center symmetry on the umbilical to be measured is as follows:
Figure BDA0004045405010000041
compared with the prior art, the technical scheme of the invention has the following advantages:
according to the umbilical bending stiffness testing device, the clamping parts and the first guide rail assemblies are arranged, the clamping parts can clamp the two ends of the umbilical to be tested, the clamping parts and the first guide rail assemblies are connected in a sliding mode, so that when the umbilical to be tested is stressed and deformed, the two ends of the umbilical can move on the first guide rail assemblies, the driving unit and the sensor unit are arranged, the first driving part of the driving unit can pull the umbilical to be tested to enable the umbilical to be bent and deformed, the first driving part can apply acting force to the umbilical to be tested through the connecting rod assemblies, the connecting rod assemblies are connected with the umbilical to be tested, the connecting positions are symmetrical in the center along the umbilical to be tested, the sensor unit can measure displacement data and tensile force data of the umbilical to be tested, and the displacement data and the tensile force data are uploaded to the control end, and the bending stiffness of the umbilical to be tested is obtained through calculation of the tested data.
Drawings
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a schematic front view of a preferred embodiment of the present invention.
Fig. 2 is a schematic top view of a preferred embodiment of the present invention.
Fig. 3 is a schematic side view of a preferred embodiment of the present invention.
Description of the specification reference numerals: 1. a cross beam; 10. the first guide rail assembly, 11, the first clamping part, 110 and the first clamping jaw; 12. a second clamping portion; 120. a second jaw; 20. a second rail assembly; 21. a first traction assembly; 22. a second traction assembly; 23. a fixing plate; 24. a first connection post, 25, a second connection post; 26. a screw elevator; 27. a support base; 28. a driving motor; 3. a tension sensor; 41. a first displacement sensor; 42. a second displacement sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the invention and practice it.
Example 1
Referring to fig. 1 to 3, the present invention discloses an umbilical bending stiffness testing apparatus, comprising,
the umbilical cable testing device comprises a frame body, wherein the frame body comprises a cross beam 1 and a first guide rail assembly 10 arranged along the length direction of the cross beam 1, the first guide rail assembly 10 comprises two guide rails arranged in parallel, the frame body further comprises a stand column, the end part of the cross beam 1 is arranged on the stand column, a clamping part is arranged on the first guide rail assembly 10 and used for clamping an umbilical cable to be tested, the clamping part is in sliding connection with the first guide rail assembly 10, the clamping part comprises a first clamping part 11 and a second clamping part 12, and the first clamping part 11 and the second clamping part 12 respectively clamp the end part of the umbilical cable to be tested;
the driving unit comprises a connecting rod assembly, a second guide rail assembly 20 and a first driving part, wherein the second guide rail assembly 20 is arranged on the cross beam, the length direction of the second guide rail assembly 20 is perpendicular to the length direction of the first guide rail assembly, the connecting rod assembly is in sliding connection with the second guide rail assembly 20, the length direction of the connecting rod assembly is parallel to the length direction of the cross beam 1, the connecting rod assembly is connected with an umbilical cable to be tested through a traction assembly, the traction assemblies are symmetrically arranged, and the traction assembly comprises a first traction assembly 21 and a second traction assembly 22. The first driving part is connected with the middle part of the connecting rod assembly, and drives the connecting rod assembly to move along the second guide rail assembly 20;
the displacement sensor unit is used for measuring displacement along the height direction of the frame body when the umbilical cable to be measured is deformed, one end of the tension sensor 3 is connected with the first driving part, and the other end of the tension sensor 3 is connected with the connecting rod assembly.
According to the umbilical cable bending stiffness testing device, the clamping parts and the first guide rail assemblies are arranged, the clamping parts can clamp the two ends of the umbilical cable to be tested, the clamping parts are connected with the first guide rail assemblies in a sliding mode, so that when the umbilical cable to be tested is stressed to deform, the two ends of the umbilical cable to be tested can move on the first guide rail assemblies, the driving unit and the sensor unit are arranged, the first driving part of the driving unit can pull the umbilical cable to be tested to bend and deform, the first driving part can apply force to the umbilical cable to be tested through the connecting rod assemblies, the connecting rod assemblies are connected with the umbilical cable to be tested, the connecting positions are symmetrical in the center along the umbilical cable to be tested, the sensor unit can measure displacement data and data of the umbilical cable to be tested and upload the displacement data to the control end, and the bending stiffness of the umbilical cable to be tested can be obtained through calculation of the data obtained through the test.
Further, the connecting rod assembly includes a fixing plate 23 and a connecting post, the connecting post is mounted on the fixing plate 23, the traction assembly is connected with the connecting post, the fixing plate 23 is connected with the first driving part, the connecting post includes a first connecting post 24 and a second connecting post 25 connected with each other, and the first connecting post 24 and the second connecting post 25 are mounted on the fixing plate 23.
Still further, the first driving part includes lead screw lift 26 and supporting seat 27, lead screw lift 26 sets up on the supporting seat 27, lead screw lift 26 with tension sensor 3 links to each other, in addition, lead screw lift 26 still links to each other with driving motor 28, so set up, lead screw lift 26 is in driving motor 28's drive is operated, is right the effort is exerted to the connecting rod subassembly, thereby the connecting rod subassembly pulling the umbilical cable that awaits measuring makes the umbilical cable that awaits measuring takes place deformation.
Specifically, the first clamping part 11 includes a first slider 110 and a first clamping jaw, where the first slider 110 is slidably connected to the first rail assembly 10, the first clamping jaw is installed on the first slider 110, and the first clamping jaw clamps one end of the umbilical to be tested; the second clamping part 12 comprises a second sliding block 120 and a second clamping jaw, the second sliding block 120 is in sliding connection with the first guide rail assembly 10, the second clamping jaw is installed on the second sliding block 120, and the second clamping jaw clamps the other end of the umbilical cable to be tested.
In detail, the traction assembly comprises a traction rope assembly and a fixing assembly, the fixing assembly is movably connected with the umbilical cable to be tested, one end of the traction rope assembly is connected with the fixing assembly, and the other end of the traction rope assembly is connected with the connecting rod assembly. In this embodiment, the haulage rope assembly employs a chain.
Further, the first traction assembly 21 and the second traction assembly 22 are symmetrically arranged along the length direction of the umbilical cable to be tested, the first traction assembly 21 comprises a first traction rope and a first fixing piece, the second traction assembly 22 comprises a second traction rope and a second fixing piece, the first traction rope is connected with the first fixing piece, and the second traction rope is connected with the second fixing piece.
It should be noted that the displacement sensor unit includes a fixed seat assembly mounted on the cross beam 1 and a displacement sensor assembly mounted on the fixed seat assembly.
In detail, the displacement sensor assembly comprises a first displacement sensor 41 and a second displacement sensor 42, wherein the first displacement sensor 41 is positioned at the middle part of the umbilical cable to be tested, and the second displacement sensor 42 is positioned at any other position of the umbilical cable to be tested.
In addition, the end of the first guide rail assembly 10 is provided with a first limit stop, the first limit stop can limit the movable position of the end of the umbilical cable to be tested, one end of the second guide rail assembly 20 is provided with a second limit stop, and the second limit stop can limit the movement of the connecting rod assembly.
Example 2
The invention also discloses a method for testing the bending stiffness of the umbilical cable, which is used for testing the umbilical cable to be tested by using the device for testing the bending stiffness of the umbilical cable, and comprises the following steps:
step S1, fixing the end part of an umbilical cable to be tested, and simultaneously, when the umbilical cable to be tested is deformed by external force, keeping the end part of the umbilical cable to be tested always positioned in the same horizontal direction;
s2, applying the same tensile force F to two position points which are symmetrical along the center on the umbilical cable to be tested, so that the umbilical cable to be tested is bent, wherein the direction of the tensile force F is mutually perpendicular to the length direction of the umbilical cable to be tested when the umbilical cable to be tested is straight;
step S3, measuring the magnitude of the tensile force F, measuring the linear distance L1 between the two position points, measuring the linear distance L2 between the two position points and the end part of the umbilical cable to be measured, measuring the displacement H1 of any position point on the umbilical cable to be measured along the tensile force direction, and measuring the maximum displacement H2 of the umbilical cable to be measured along the tensile force direction;
it should be noted that, since the two position points are symmetrical to each other, the two position points are respectively equal to the straight line distance of the end of the umbilical cable to be measured.
Step S4, calculating according to F, L1, L2, H1 and H2 to obtain bending moment and bending curvature, wherein,
the formula for calculating the bending moment is: m=f×l 2 ；
The formula for calculating the bending curvature is:
Figure BDA0004045405010000081
step S5, calculating to obtain bending rigidity according to the bending moment and the bending curvature,
the formula for calculating the bending stiffness is:
Figure BDA0004045405010000082
in detail, the method for applying the tensile force F to the umbilical cable to be tested in the step S2 specifically includes:
step S21, connecting the two position points with a connecting rod assembly through a first traction assembly 21 and a second traction assembly 22, and applying a tensile force f to the connecting rod assembly to enable the umbilical cable to be tested to be stressed and bent, wherein the direction of the tensile force f is perpendicular to the length direction of the umbilical cable to be tested when the umbilical cable to be tested is straight;
step S22, measuring the magnitude of the tensile force F, so that it can be known that the tensile force F at two points along the central symmetry on the umbilical to be measured is:
Figure BDA0004045405010000083
on this basis, steps S3, S4, S5 are continued, and the bending stiffness of the umbilical is calculated.
On the other hand, the data obtained by the test are uploaded to the control end, the control end system can calculate, so that bending moment and bending curvature are obtained, a rectangular coordinate system is established, the ordinate represents the bending moment, the abscissa represents the bending curvature, and data fitting is performed through the control end system, so that the bending rigidity of the umbilical cable is finally obtained.
In summary, according to the umbilical cable bending stiffness testing device disclosed by the invention, the clamping part and the first guide rail assembly are arranged, the clamping part can clamp two ends of an umbilical cable to be tested, the clamping part is in sliding connection with the first guide rail assembly, so that when the umbilical cable to be tested is stressed and deformed, the two ends of the umbilical cable can move on the first guide rail assembly, the driving unit and the sensor unit are further arranged, the first driving part of the driving unit can pull the umbilical cable to be tested to generate bending deformation, the first driving part can apply a acting force to the umbilical cable to be tested through the connecting rod assembly, the connecting rod assembly is connected with the umbilical cable to be tested, the connecting position is symmetrical along the center of the umbilical cable to be tested, the sensor unit can measure displacement data and tensile force data of the umbilical cable to be tested, and the displacement data and the tensile force data are uploaded to the control end, and the bending stiffness of the umbilical cable to be tested can be obtained through calculating the data obtained through the test.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. An umbilical cable bending stiffness testing arrangement, its characterized in that: comprising the steps of (a) a step of,
the umbilical cable testing device comprises a frame body, a first guide rail assembly and a second guide rail assembly, wherein the frame body comprises a cross beam and a first guide rail assembly arranged along the length direction of the cross beam, a clamping part is arranged on the first guide rail assembly and used for clamping an umbilical cable to be tested, the clamping part is in sliding connection with the first guide rail assembly, and the clamping part comprises a first clamping part and a second clamping part;
the driving unit comprises a connecting rod assembly, a second guide rail assembly and a first driving part, wherein the second guide rail assembly is arranged on the cross beam, the length direction of the second guide rail assembly is perpendicular to the length direction of the first guide rail assembly, the connecting rod assembly is in sliding connection with the second guide rail assembly, the length direction of the connecting rod assembly is parallel to the length direction of the cross beam, the connecting rod assembly is connected with an umbilical cable to be tested through a traction assembly, the traction assemblies are symmetrically arranged, the first driving part is connected with the middle part of the connecting rod assembly, and the first driving part drives the connecting rod assembly to move along the second guide rail assembly;
the displacement sensor unit is used for measuring displacement along the height direction of the frame body when the umbilical cable to be measured is deformed, one end of the tension sensor is connected with the first driving part, and the other end of the tension sensor is connected with the connecting rod assembly.
2. The umbilical bending stiffness testing device of claim 1, wherein: the connecting rod assembly comprises a fixing plate and a connecting column, the connecting column is installed on the fixing plate, the traction assembly is connected with the connecting column, and the fixing plate is connected with the first driving part.
3. The umbilical bending stiffness testing device according to claim 2, wherein: the first driving part comprises a screw rod lifter and a supporting seat, wherein the screw rod lifter is arranged on the supporting seat, and the screw rod lifter is connected with the fixing plate.
4. The umbilical bending stiffness testing device of claim 1, wherein: the first clamping part comprises a first sliding block and a first clamping jaw, the first sliding block is in sliding connection with the first guide rail assembly, the first clamping jaw is installed on the first sliding block, the first clamping jaw clamps the umbilical cable to be tested, and the setting mode of the second clamping part is the same as that of the first clamping part.
5. The umbilical bending stiffness testing device of claim 1, wherein: the traction assembly comprises a traction rope assembly and a fixing assembly, the fixing assembly is movably connected with the umbilical cable to be tested, one end of the traction rope assembly is connected with the fixing assembly, and the other end of the traction rope assembly is connected with the connecting rod assembly.
6. The umbilical bending stiffness testing device of claim 5, wherein: the traction assembly comprises a first traction assembly and a second traction assembly, the first traction assembly and the second traction assembly are symmetrically arranged along the length direction of the umbilical cable to be tested, the first traction assembly comprises a first traction rope and a first fixing piece which are connected with each other, and the second traction assembly comprises a second traction rope and a second fixing piece which are connected with each other.
7. The umbilical bending stiffness testing device of claim 1, wherein: the displacement sensor unit comprises a fixed seat assembly and a displacement sensor assembly, wherein the fixed seat assembly is installed on the cross beam, and the displacement sensor assembly is installed on the fixed seat assembly.
8. The umbilical bending stiffness testing device of claim 7, wherein: the displacement sensor assembly comprises a first displacement sensor and a second displacement sensor, wherein the first displacement sensor is positioned in the middle of the umbilical cable to be measured, and the second displacement sensor is positioned at any other position of the umbilical cable to be measured.
9. The umbilical cable bending stiffness testing method is characterized by comprising the following steps of: testing an umbilical to be tested with the umbilical bending stiffness testing device according to any of claims 1-8, the testing method comprising:
step S1, fixing the end part of an umbilical cable to be tested;
s2, applying the same tensile force F to two position points which are symmetrical along the center on the umbilical cable to be tested, so that the umbilical cable to be tested is bent;
step S3, measuring the magnitude of the tensile force F, measuring the linear distance L1 between the two position points, measuring the linear distance L2 between the two position points and the end part of the umbilical cable to be measured, measuring the displacement H1 of any position point on the umbilical cable to be measured along the tensile force direction, and measuring the maximum displacement H2 of the umbilical cable to be measured along the tensile force direction;
step S4, calculating according to F, L1, L2, H1 and H2 to obtain bending moment and bending curvature, wherein,
the formula for calculating the bending moment is: m=f×l 2 ；
The formula for calculating the bending curvature is:
Figure FDA0004045405000000031
step S5, calculating to obtain bending rigidity according to the bending moment and the bending curvature,
the formula for calculating the bending stiffness is:
Figure FDA0004045405000000032
10. the umbilical bending stiffness testing method according to claim 9, wherein: the method for measuring the tensile force F at two points along the center symmetry on the umbilical cable in step S2 includes:
step S21, connecting the two position points with a connecting rod assembly at the same time, and applying a tensile force f to the connecting rod to bend the umbilical cable to be tested;
step S22, measuring the tensile force F, wherein the tensile force F on two position points along the center symmetry on the umbilical to be measured is as follows:
Figure FDA0004045405000000033
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CN202310037609.5A 2023-01-09 2023-01-09 Umbilical cable bending stiffness testing device and method Pending CN116086988A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117091969A (en) * 2023-10-16 2023-11-21 江苏亨通高压海缆有限公司 Umbilical cable bending stiffness testing equipment and testing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117091969A (en) * 2023-10-16 2023-11-21 江苏亨通高压海缆有限公司 Umbilical cable bending stiffness testing equipment and testing method
CN117091969B (en) * 2023-10-16 2023-12-15 江苏亨通高压海缆有限公司 Umbilical cable bending stiffness testing equipment and testing method

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