Cable simplification test method

Abstract

The application discloses a cable simplification test method, comprising the following steps: S1, determining the cables to be simplified and synthesized according to the specific arrangement form of the cables in the model test; S2, determining the fixed positions of the two ends of the cables to be simplified and synthesized; S3, taking the average positions of the fixed points of the two ends of the cables to be simplified and synthesized as the fixed points of the two ends of the synthesized cable; S4, installing sensors or other accessories on the synthesized cable; S5, adjusting the length or other adjustable parameters of the synthesized cable until the test design requirements are met, recording the final parameter settings as the basis for cable design and application, and generating a detailed test report. The application solves the problem that the cables, sensors and other accessories cannot be arranged due to the small cable spacing in the model test.

Description

Technical Field

[0001] This invention belongs to the field of model testing technology, specifically a simplified cable testing method. Background Technology

[0002] Currently, offshore platforms are structures that provide production and living facilities for activities such as drilling, oil production, cargo transportation, observation, navigation, and construction at sea. Based on their structural characteristics and operational status, they can be divided into three main categories: fixed, mobile, and semi-fixed. Mobile and semi-fixed offshore platforms sometimes require mooring cables to help maintain their relative position. In addition to the cable itself, mooring cables also include the connection points between the platform and other fixed structures such as anchor chains and anchor ropes.

[0003] During the model test, due to the relatively tight spacing of some cables in the prototype, the cable model, sensors or other cable accessories could not be arranged with smaller spacing. Therefore, it is necessary to merge and simplify the cables, and thus provide a simplified cable test method. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a simplified cable testing method, which solves the problem that the cable spacing is too small in model tests, making it impossible to arrange cables, sensors, and other accessories.

[0005] The technical solution to achieve the above objectives is:

[0006] A simplified testing method for cables includes:

[0007] Step S1: Determine the cable that needs to be simplified for synthesis based on the specific arrangement of the cable in the model test;

[0008] Step S2: Determine the fixed positions at both ends of the multiple cables to be simplified for synthesis;

[0009] Step S3: Take the average position of the two fixed points at both ends of the cable that needs to be simplified and synthesized as the two fixed points of the synthesized cable.

[0010] Step S4: Install sensors or other accessories on the merged cable;

[0011] Step S5: Adjust the length of the synthesized cable or other adjustable parameters until the experimental design requirements are met. Record the final parameter settings as the basis for cable design and application, and generate a detailed test report.

[0012] Preferably, step S1 includes:

[0013] Step S11: Collect data on the arrangement, location, size, and performance of the cables from the model tests;

[0014] Step S12: Analyze the performance of the cable under different conditions, including the effects of waves and water flow, fatigue life, corrosion resistance and water pressure resistance.

[0015] Step S13: Based on the analysis results, identify the location and form of the cable that needs to be simplified in the synthesis.

[0016] Preferably, step S3 includes:

[0017] Step S31: Determine the positions of the fixing points at both ends of the original cable;

[0018] Let the coordinates of the two fixed points be (x1, y1) and (x2, y2) respectively;

[0019] Step S32: Calculate the average position of the two fixed points;

[0020] The coordinates of the average position are calculated using the following formula:

[0021]

[0022] Step S33: Use the calculated average position as the new fixing point of the synthesized cable.

[0023] Preferably, step S4 includes:

[0024] Step S41: Select a suitable sensor according to the test requirements and determine the specific position of the sensor on the cable.

[0025] Step S42: Calibrate all sensors before installation;

[0026] Step S43: Secure the sensor and other accessories to the cable using a special clamp or adhesive.

[0027] Preferably, in step S43, other accessories include, but are not limited to, fixing clips, protective sleeves, and data cables.

[0028] Preferably, in step S5, the experimental design requirements are met as follows:

[0029] The axial stiffness of the synthesized cable is made equal to or approximately equal to the sum of the axial stiffnesses of the original cables, and the initial tension of the synthesized cable is made equal to or approximately equal to the sum of the initial tensions of the original cables.

[0030] Preferably, in step S5, if the axial stiffness of the cables to be merged is a constant, then the axial stiffness of the merged cables should be equal to or close to the sum of the axial stiffness of the cables before merging.

[0031] If the axial stiffness of the cables to be merged varies with the cable elongation, and the axial stiffness is fitted as a function of the cable elongation, then the axial stiffness function of the merged cables is equal to or close to the linear sum of the axial stiffness functions of the cables before merging.

[0032] Preferably, in step S5, the test report includes the test method, parameter settings, test results, and conclusions.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention combines multiple cables that are relatively close to each other in the mooring system used in the model experiment into one cable, which reduces friction and wear between the cables, thereby reducing the risk of cable breakage and improving the overall safety of the mooring system. It also solves the problem that the cable model, sensor or other cable accessories cannot be placed when the spacing of some cables is too close in the model experiment. Furthermore, it reduces the number of cables used in the experiment, thereby reducing maintenance costs and the difficulty of the model experiment. Attached Figure Description

[0034] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0035] Figure 1 This is a flowchart of a simplified cable testing method according to the present invention;

[0036] Figure 2 This is a flowchart illustrating the process of determining the simplified synthesis of the cable based on the specific arrangement of the cable in the model test in this invention.

[0037] Figure 3 This is a flowchart illustrating the process of taking the average position of the two fixed points at both ends of the cable to be simplified and synthesized as the fixed points at both ends of the synthesized cable in this invention.

[0038] Figure 4 This is a flowchart illustrating the specific process of installing sensors or other accessories on the cable obtained after merging in this invention.

[0039] Figure 5 This is a schematic diagram of the setup for a model experiment in an embodiment of the present invention. Detailed Implementation

[0040] 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.

[0041] like Figure 1 As shown, a simplified testing method for cables includes:

[0042] Step S1: Determine the cable that needs to be simplified for synthesis based on the specific arrangement of the cable in the model test.

[0043] like Figure 2 As shown, step S1 includes:

[0044] Step S11: Collect data on the arrangement, location, size, and performance of the cables from the model tests.

[0045] Step S12: Analyze the performance of the cable under different conditions, including the effects of waves and water flow, fatigue life, corrosion resistance and water pressure resistance.

[0046] Step S13: Based on the analysis results, identify the location and form of the cable that needs to be simplified in the synthesis.

[0047] Step S2: Determine the fixed positions at both ends of the multiple cables to be simplified for synthesis.

[0048] In the embodiments, the multiple cables that need to be simplified are usually fixed at similar positions at both ends, and the cables are parallel to each other or at a small angle.

[0049] Step S3: Take the average position of the two fixed points at both ends of the cable that needs to be simplified and synthesized as the two fixed points of the synthesized cable.

[0050] like Figure 3 As shown, step S3 includes:

[0051] Step S31: Determine the positions of the fixing points at both ends of the original cable;

[0052] Let the coordinates of the two fixed points be (x1, y1) and (x2, y2) respectively;

[0053] Step S32: Calculate the average position of the two fixed points;

[0054] The coordinates of the average position are calculated using the following formula:

[0055]

[0056] Step S33: Use the calculated average position as the new fixing point of the synthesized cable.

[0057] Step S4: Install sensors or other accessories on the merged cable.

[0058] like Figure 4 As shown, step S4 includes:

[0059] Step S41: Select a suitable sensor according to the test requirements and determine the specific position of the sensor on the cable.

[0060] Step S42: Calibrate all sensors before installation;

[0061] Step S43: Secure the sensor and other accessories to the cable using a special clamp or adhesive.

[0062] In this embodiment, other accessories include, but are not limited to, fixing clips, protective sleeves, and data cables.

[0063] Step S5: Adjust the length of the synthesized cable or other adjustable parameters until the experimental design requirements are met. Record the final parameter settings as the basis for cable design and application, and generate a detailed test report.

[0064] In the embodiments, the experimental design requirements are met as follows:

[0065] The axial stiffness of the synthesized cable is made equal to or approximately equal to the sum of the axial stiffnesses of the original cables, and the initial tension of the synthesized cable is made equal to or approximately equal to the sum of the initial tensions of the original cables.

[0066] In the embodiment, if the axial stiffness of the cables to be merged is a constant, the axial stiffness of the merged cables should be equal to or close to the sum of the axial stiffness of the cables before merging.

[0067] If the axial stiffness of the cables to be merged varies with the cable elongation, and the axial stiffness is fitted as a function of the cable elongation, then the axial stiffness function of the merged cables is equal to or close to the linear sum of the axial stiffness functions of the cables before merging.

[0068] In this embodiment, the test report includes the test method, parameter settings, test results, and conclusions.

[0069] The following embodiments are based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes.

[0070] Figure 5 This is a schematic diagram of the setup for a model experiment. Device 1 and device 2 are connected by cables 1 and 2. The A and B endpoints of cables 1 and 2 are close together, and the included angle between the cables is small. Therefore, cables 1 and 2 are combined into one cable.

[0071] Take the average position of endpoints A and B of cable 1 and cable 2 as the position of endpoints A and B of cable 3. Adjust the length of cable 3 or other adjustable parameters so that the initial tension of cable 3 is equal to or approximately equal to the sum of the initial tensions of cable 1 and cable 2, and the axial stiffness of cable 3 is equal to or approximately equal to the sum of the axial stiffness of cable 1 and cable 2.

[0072] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A simplified test method for cables, characterized in that, include: Step S1: Determine the cable that needs to be simplified for synthesis based on the specific arrangement of the cable in the model test; Step S2: Determine the fixed positions at both ends of the multiple cables to be simplified for synthesis; Step S3: Take the average position of the two fixed points at both ends of the cable that needs to be simplified and synthesized as the two fixed points of the synthesized cable. Step S4: Install sensors or other accessories on the merged cable; Step S5: Adjust the length of the synthesized cable or other adjustable parameters until the experimental design requirements are met. Record the final parameter settings as the basis for cable design and application, and generate a detailed test report. Step S1 includes: Step S11: Collect data on the arrangement, location, size, and performance of the cables from the model tests; Step S12: Analyze the performance of the cable under different conditions, including the effects of waves and water flow, fatigue life, corrosion resistance and water pressure resistance. Step S13: Based on the analysis results, identify the location and form of the cable that needs to be simplified in the synthesis. Step S3 includes: Step S31: Determine the positions of the fixing points at both ends of the original cable; Let the coordinates of the two fixed points be respectively and ; Step S32: Calculate the average position of the two fixed points; The coordinates of the average position are calculated using the following formula: ； ； Step S33: Use the calculated average position as the new fixing point of the synthesized cable; Step S4 includes: Step S41: Select a suitable sensor according to the test requirements and determine the specific position of the sensor on the cable. Step S42: Calibrate all sensors before installation; Step S43: Secure the sensor and other accessories to the cable using a special clamp or adhesive. In step S5, the experimental design requirements are met as follows: The axial stiffness of the synthesized cable is made equal to or approximately equal to the sum of the axial stiffness of the original cables, and the initial tension of the synthesized cable is made equal to or approximately equal to the sum of the initial tension of the original cables. In step S5, if the axial stiffness of the cables to be merged is a constant, the axial stiffness of the merged cables should be equal to or close to the sum of the axial stiffness of the cables before merging. If the axial stiffness of the cables to be merged varies with cable elongation, and the axial stiffness is fitted as a function of cable elongation, then the axial stiffness function of the merged cables is equal to or close to the linear sum of the axial stiffness functions of the cables before merging.

2. The simplified cable testing method according to claim 1, characterized in that, In step S43, other accessories include, but are not limited to, fixing clips, protective sleeves, and data cables.

3. The simplified cable testing method according to claim 1, characterized in that, In step S5, the test report includes the test method, parameter settings, test results, and conclusions.

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