A method for implementing a scaled water tank experiment on submarine debris flow impacting umbilical cables

Abstract

The present invention provides a method for implementing a scaled-down water tank experiment on submarine debris flow impacting a umbilical cable. The method comprises the following steps: obtaining the rheological parameters (yield stress, viscosity parameter, and fluidity index) of the debris flow in the target sea area and the prototype operating conditions of the debris flow impacting the umbilical cable (the outer diameter and span height of the umbilical cable, and the impact velocity of the debris flow); determining the outer diameter of the model umbilical cable in the scaled-down water tank experiment; determining the impact velocity of the debris flow and the span height of the model umbilical cable in the model operating conditions based on the rheological parameters, the prototype operating conditions, and the outer diameter of the model umbilical cable; and constructing the model operating conditions of the scaled-down water tank experiment based on the outer diameter and span height of the model umbilical cable and the impact velocity of the debris flow in the model operating conditions. The method provided in this embodiment can determine the various parameters required for the model operating conditions through simple calculations based on the acquired known data. The method is simple in steps and easy to implement, providing a sufficient scientific basis for optimizing the design of submarine umbilical cable projects.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering geology, and in particular to a method for implementing a scaled water tank experiment on submarine debris flow impacting an umbilical cable. Background Art

[0002] Submarine debris flows are a typical marine geological hazard, posing a serious threat to critical submarine infrastructure such as ducts and cables. Research on the impact of submarine debris flows on ducts and cables can help optimize duct and cable engineering designs and reduce geological hazard risks.

[0003] Given the challenges of in-situ observations and the scarcity of observational data, scaled-down flume experiments are being used to simulate the impact of submarine debris flows on umbilical cables under real-world conditions. This allows for direct observation of the physical phenomena involved in the impact process and measurement of the impact force, providing a robust scientific basis for optimizing umbilical cable engineering design. Currently, reliable similarity theory has not yet been established for the design of scaled-down flume experimental models of debris flow impacting umbilical cables. This makes it difficult to guarantee that the model conditions will be similar to the prototype conditions, severely impacting the applicability of the model results.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for implementing a scaled-down water tank test of submarine debris flow impacting umbilical cables in response to the above-mentioned defects of the prior art. The method aims to solve the problem that the working conditions of the scaled-down water tank test model of debris flow impacting umbilical cables in the prior art are significantly different from those of the prototype, and the similarity cannot meet the practical requirements.

[0006] The technical solution adopted by the present invention to solve the problem is as follows:

[0007] This embodiment provides a method for implementing a scaled-down water tank experiment on submarine debris flow impacting an umbilical cable, comprising:

[0008] Obtaining the rheological parameters of the debris flow in the target sea area and the prototype working condition of the debris flow impacting the umbilical cable; wherein the rheological parameters include yield stress, viscosity parameter, and fluidity index; the prototype working condition includes the outer diameter and span height of the umbilical cable and the impact velocity of the debris flow;

[0009] Determine the outer diameter of the model pipe and cable in the scaled flume test model;

[0010] determining an impact velocity of the debris flow and a span height of the model umbilical cable in the model working condition based on the rheological parameters, the prototype working condition, and the outer diameter of the model umbilical cable;

[0011] A scaled flume test model working condition is constructed based on the outer diameter and span height of the model umbilical and the impact velocity of the debris flow in the model working condition.

[0012] Optionally, the step of determining the impact velocity of the debris flow under the model working condition based on the rheological parameters, the prototype working condition and the outer diameter of the model umbilical cable includes:

[0013] Calculating a velocity scale according to the rheological parameters, the prototype working condition, and the outer diameter of the model umbilical;

[0014] The impact velocity of the debris flow in the model working condition is calculated based on the velocity scale and the impact velocity of the debris flow in the prototype working condition.

[0015] Optionally, the step of calculating the velocity scale according to the rheological parameters, the prototype working condition and the outer diameter of the model umbilical cable includes:

[0016] Calculating a length scale according to the outer diameter of the prototype umbilical and the outer diameter of the model umbilical;

[0017] Substitute the yield stress, viscosity parameter, fluidity index, length scale, impact velocity of the debris flow in the prototype working condition, and the outer diameter of the umbilical into the following relationship to calculate the velocity scale;

[0018]

[0019] Among them, τ y is the yield stress, κ is the viscosity parameter, n is the fluidity index, λ is the length scale, u P is the impact velocity of the debris flow in the prototype working condition, d P is the outer diameter of the prototype cable and η is the velocity scale.

[0020] Optionally, the step of determining the span height of the model umbilical according to the rheological parameters, the prototype working condition, and the outer diameter of the model umbilical includes:

[0021] Calculating the span height of the model umbilical cable based on the length scale and the span height of the prototype umbilical cable;

[0022] A scaled flume test model working condition is constructed based on the outer diameter and span height of the model umbilical and the impact velocity of the debris flow in the model working condition.

[0023] Optionally, the step of obtaining rheological parameters of the submarine debris flow and a prototype working condition of the debris flow impacting the umbilical cable includes:

[0024] Use measuring instruments to measure the rheological parameters of debris flow in the target sea area;

[0025] The prototype working condition of debris flow impacting the pipe and cable in the target sea area is determined according to the location of the target sea area.

[0026] Optionally, the relationship is derived by taking the debris flow as the Herbach fluid and satisfying the similarity criterion of the plastic Reynolds number;

[0027] Optionally, the relationship is derived by taking the debris flow as a power-law fluid and satisfying the plastic Reynolds number similarity criterion.

[0028] Beneficial effects of the present invention:

[0029] The present invention provides a method for conducting a scaled-down water tank experiment on submarine debris flow impacting an umbilical cable. The method comprises the following steps: obtaining rheological parameters of the submarine debris flow and a prototype operating condition for the debris flow impacting the umbilical cable, and determining the outer diameter of a model umbilical cable in the scaled-down water tank experiment; determining the impact velocity of the debris flow and the free span height of the model umbilical cable in the model operating condition based on the rheological parameters of the debris flow, the prototype operating condition, and the outer diameter of the model umbilical cable; and constructing a model operating condition for the scaled-down water tank experiment based on the outer diameter and free span height of the model umbilical cable and the impact velocity of the debris flow in the model operating condition. The method provided in this embodiment can determine the various parameters required for the model operating condition through simple calculation based on the acquired known data. The method is simple in steps and easy to implement, providing a sufficient scientific basis for optimizing submarine umbilical cable engineering design. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a flowchart of the steps of a method for implementing a scaled water flume experiment on debris flow impacting an umbilical cable according to an embodiment of the present invention;

[0032] Figure 2 3. This is a comparison curve diagram of the drag force coefficient in the prototype working condition and the model working condition during the CFD numerical simulation of the Herbach-type debris flow provided by an embodiment of the present invention;

[0033] Figure 3a 3 is a comparison curve diagram of the drag force coefficient in the prototype working condition and the model working condition during the CFD numerical simulation of the power-law debris flow provided by the embodiment of the present invention;

[0034] Figure 3b 3 is a comparison curve diagram of the lift coefficients of the prototype working condition and the model working condition in the CFD numerical simulation of the power-law debris flow provided by the embodiment of the present invention;

[0035] Figure 3c This is a comparison curve diagram of the Strouhal number in the prototype condition and the model condition during CFD numerical simulation of the power-law debris flow provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clear and distinct, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0038] In the study of the impact force of submarine debris flow on pipes and cables, due to the extremely challenging in-situ observation and the extremely scarce observation data, the existing technical solutions mostly use scaled water tank experimental model conditions to simulate the impact of debris flow on pipes and cables under real-scale conditions. In the model conditions, the physical phenomena of the entire impact process can be directly observed, and the stress conditions of pipes and cables during the impact process can be measured. Among them, pipes and cables include: communication optical cables, electrical cables, and oil and gas pipelines.

[0039] In the process of designing scaled-down water tank test model conditions, one of the most critical technical links is to ensure the similarity between the model conditions and the prototype conditions. Only when the model conditions are similar to the prototype conditions can the model condition results based on the scaled-down water tank experiment be applied to the real-scale prototype conditions. However, in the design of scaled-down water tank test model conditions for debris flow impacting pipes and cables, a theoretically solid, convenient and reliable implementation method has not yet been formed. In the process of designing scaled-down water tank test model conditions, the existing technology only satisfies the plastic Reynolds number range of multiple groups of model conditions and prototype conditions to be similar, but this is far from guaranteeing that the model conditions are similar to the prototype conditions, which seriously affects the applicability of the model condition results. Therefore, the experimental results obtained using existing technical methods cannot be directly applied to actual projects to evaluate the stress conditions of pipes and cables, and therefore cannot provide accurate guidance for pipe and cable design optimization.

[0040] In response to the above-mentioned problems arising in the prior art, this embodiment provides a method for implementing a scaled-down water tank experiment on submarine debris flow impacting pipes and cables. The debris flow is taken as a Herbach fluid or a power-law fluid. Under the condition of satisfying the plastic Reynolds number similarity criterion, the similarity relationship between the model working condition and the prototype working condition is derived. The relevant parameters of the model working condition are derived using known data, thereby constructing a scaled-down water tank experimental model working condition that is completely or approximately similar to the prototype working condition. Based on the model working condition, the stress conditions of the pipe and cable in the prototype working condition are explored, thereby providing technical support for the optimal design of the pipe and cable project.

[0041] The method of this embodiment is further described in detail below with reference to the accompanying drawings.

[0042] Exemplary Methods

[0043] like Figure 1 As shown, this embodiment provides a method for implementing a scaled water tank experiment on submarine debris flow impacting an umbilical cable, comprising:

[0044] Step S1: obtaining rheological parameters of submarine debris flow in the target sea area and a prototype working condition of debris flow impacting umbilical cables.

[0045] First, in order to evaluate the stress conditions of debris flow impacting umbilical cables in a specific application, it is necessary to obtain parameters related to the stress of umbilical cables in the target sea area. Therefore, in this step, it is necessary to obtain the rheological parameters of the debris flow in the target sea area and the prototype working conditions of the debris flow impacting the umbilical cables.

[0046] Specifically, the rheological parameters of debris flows include yield stress, viscosity, and fluidity index. In practice, the yield stress, viscosity, and fluidity index of debris flows in the target sea area can all be measured using instruments. The prototype operating conditions in the target sea area are known data, namely, the outer diameter and span height of the duct and cable, as well as the impact velocity of the debris flow, are known constants that can be obtained from relevant data or calculated based on relevant information.

[0047] This step S1, in its specific implementation, includes the following steps:

[0048] Use measuring instruments to measure the rheological parameters of debris flow in the target sea area;

[0049] The prototype working condition of debris flow impacting the pipe and cable in the target sea area is determined according to the location of the target sea area.

[0050] First, the rheological parameters of the debris flow in the target sea area are measured using measuring instruments. Then, based on the information of the location of the target sea area, the prototype working conditions of the debris flow impacting the pipe and cable in the target sea area are searched and calculated, thereby obtaining preliminary relevant data information.

[0051] Step S2: determining the outer diameter of the model pipe and cable in the scaled-down water tank test model working condition.

[0052] The outer diameter of the model duct in the scaled flume test model is set based on the feasibility and cost of the experiment, as well as the desired measurement accuracy. In specific implementations, the outer diameter of the model duct can be set to 1 cm, 2 cm, or other values.

[0053] Step S3: determining the impact velocity of the debris flow in the model working condition according to the rheological parameters, the prototype working condition and the outer diameter of the model umbilical.

[0054] The impact velocity of the debris flow in the model working condition is determined based on the data information obtained in step S1. Specifically, the determination step includes:

[0055] Step S31 : Calculate the velocity scale according to the rheological parameters of the debris flow, the prototype working condition, and the outer diameter of the model umbilical.

[0056] First, a length scale is calculated based on the outer diameter of the prototype umbilical and the outer diameter of the model umbilical;

[0057]

[0058] Where λ is the length scale, d P is the outer diameter of the prototype cable, d M is the outer diameter of the model cable.

[0059] Then, the yield stress, viscosity parameter, fluidity index, length scale, impact velocity of the debris flow in the prototype working condition, and the outer diameter of the pipe and cable are substituted into the following relationship to calculate the velocity scale;

[0060]

[0061] Among them, τ y is the yield stress, κ is the viscosity parameter, n is the fluidity index, λ is the length scale, u P is the impact velocity of the debris flow in the prototype working condition, d P is the outer diameter of the prototype cable and η is the velocity scale.

[0062] In this embodiment, the relationship is derived by assuming that the submarine debris flow is a Herbach fluid or a power-law fluid and that the plastic Reynolds number similarity criterion is satisfied.

[0063] Step S32: Calculate the impact velocity of the debris flow in the model working condition according to the velocity scale and the impact velocity of the debris flow in the prototype working condition.

[0064] According to the velocity scale calculated in the above steps and the impact velocity of the debris flow in the prototype working condition, the impact velocity of the debris flow in the model working condition is calculated. The calculation formula is:

[0065]

[0066] Among them, u M is the impact velocity of the debris flow in the model condition, u P is the impact velocity of the debris flow in the prototype working condition, and η is the velocity scale.

[0067] Since the impact velocity and length ratio of the debris flow in the prototype working condition have been obtained, the impact velocity of the debris flow in the model working condition can be calculated based on the above calculation formula.

[0068] Furthermore, based on the length scale calculated in the above steps and the known span height of the prototype umbilical cable, the span height of the model umbilical cable is calculated;

[0069]

[0070] Among them, h M is the span height of the model cable, h P is the span height of the prototype cable and λ is the length scale.

[0071] Step S4: constructing a scaled flume test model working condition according to the outer diameter and span height of the model umbilical and the impact velocity of the debris flow in the model working condition.

[0072] Since the parameters required to construct the model working condition (the outer diameter and span height of the model cable and the impact velocity of the debris flow in the model working condition) have been obtained, a scaled flume test model working condition can be constructed.

[0073] The above method provided in this embodiment obtains the impact velocity of the debris flow and the span height of the model cable in the model working condition through simple calculation, thereby realizing the construction of the model working condition, and then studying the prototype working condition of the debris flow impacting the cable in the target sea area, and optimizing the design based on the research results.

[0074] The calculation relationship used in this embodiment is derived through theoretical analysis, and the specific derivation process is as follows:

[0075] Rheological experiments show that submarine debris flow is a viscoplastic fluid, and its rheological properties can be described by the Herbach constitutive relation:

[0076]

[0077] Where τ is the shear stress, τ yis the yield stress, κ is the viscosity parameter, n is the fluidity index, and γ is the shear rate. When the yield stress is zero, the Heba constitutive relation degenerates into a power-law constitutive relation. The shear rate and plastic Reynolds number are expressed as:

[0078]

[0079]

[0080] where u is the impact velocity of the debris flow, d is the outer diameter of the umbilical, Rep is the plastic Reynolds number, and ρ is the density of the debris flow.

[0081] Based on the plastic Reynolds number similarity criterion, a similarity relationship between the model working condition and the prototype working condition is established:

[0082] Rep M =Rep P (3)

[0083] Among them, Rep M is the plastic Reynolds number of the model condition, Rep P is the plastic Reynolds number of the prototype condition. Substituting formula (2b) into formula (3) yields:

[0084]

[0085] Among them, u M is the impact velocity of the debris flow in the model condition, τ M is the shear stress of the model condition, u P is the impact velocity of the debris flow in the prototype working condition, τ P is the shear stress of the prototype condition. Referring to the Herbach constitutive relation in formula (1) and the definition of shear rate in formula (2a), the shear stress of the model condition and the prototype condition are expressed as:

[0086]

[0087]

[0088] Among them, d M is the outer diameter of the model cable, d P is the outer diameter of the prototype cable. Substituting formulas (5a) and (5b) into formula (4), we obtain:

[0089]

[0090] Further simplifying formula (6), we can get the velocity scale. To simplify the derivation, the length scale and velocity scale can be defined as:

[0091]

[0092]

[0093] Where λ is the length scale and η is the velocity scale. The outer diameter of the model umbilical and the impact velocity of the debris flow in the model working condition can be obtained from formulas (7a) and (7b):

[0094]

[0095]

[0096] Substituting formulas (8a) and (8b) into formula (6) yields:

[0097]

[0098] Further sorting out formula (9) yields:

[0099]

[0100] The effectiveness and practicality of the method provided in this embodiment are verified by computational fluid dynamics numerical simulation analysis (CFD simulation) to prove that the theoretical basis of the method in this embodiment is sufficient and the similarity between the model working condition and the prototype working condition is high.

[0101] Taking the CFD simulation of a debris flow with a kaolin content of 35% (by mass) impacting a model umbilical and a prototype umbilical as an example, the verification results are given as follows:

[0102] In a specific embodiment, the data and results of the prototype working condition and the model working condition used in the CFD simulation are shown in Table 1 and Table 2 below:

[0103] Table 1 shows the CFD simulation data of the Herbach-type debris flow impacting the model umbilical and the prototype umbilical.

[0104] Table 1

[0105]

[0106]

[0107] Table 2 shows the CFD simulation data of the power-law debris flow impacting the model umbilical and the prototype umbilical.

[0108] Table 2

[0109]

[0110]

[0111] from Figure 2It can be seen from the data that when a Herbach-type debris flow impacts a model umbilical, the drag coefficient is similar to that of the prototype. Therefore, the method provided in this embodiment is suitable for designing a scaled flume experimental model condition to study the prototype condition of a Herbach-type debris flow impacting a umbilical. The constructed model condition has a drag coefficient similar to that of the prototype condition.

[0112] Combine Figures 3a to 3c It can be found that when a power-law debris flow impacts a model umbilical, the drag coefficient, lift coefficient, and Strouhal number are similar to those of the prototype. Therefore, the method proposed in this embodiment is suitable for designing a scaled flume experimental model condition to study the prototype condition of a power-law debris flow impacting a umbilical. The constructed model condition has a drag coefficient, lift coefficient, and Strouhal number similar to those of the prototype condition.

[0113] Specifically, taking the prototype working condition of debris flow impacting the pipe and cable as an example, the application of the working condition of the scaled flume test model designed in this embodiment is given.

[0114] Example 1: Take the prototype working condition of Heba-type debris flow impacting the cable as an example.

[0115] Determine the rheological parameters of the Hebbach-type debris flow in the target sea area, where the yield stress is 161.0 Pa and the viscosity parameter is 25.0 Pa·s 0.4 , the liquidity index is 0.4.

[0116] The prototype working conditions of the Herbach-type debris flow impacting the umbilical cable were determined: the outer diameter of the prototype umbilical cable was 1.0 m, the span height was 1.0 m, and the impact velocity of the debris flow was 3.5 m / s.

[0117] Determine the outer diameter of the model pipe and cable in the scaled flume test model condition: the outer diameter of the model pipe and cable is set to 0.01m.

[0118] According to the outer diameters of the prototype and model ducts, the length ratio can be calculated as:

[0119]

[0120] Then, the yield stress, viscosity parameter, fluidity index, length scale, impact velocity of the debris flow in the prototype working condition, and the outer diameter of the cable are substituted into the following relationship to calculate the velocity scale:

[0121]

[0122] From the above formula, the velocity ratio can be calculated to be 0.657, and then the impact velocity of the debris flow in the model working condition is calculated as:

[0123]

[0124] Based on the calculated length scale and the known span height of the prototype umbilical cable, the span height of the model umbilical cable is calculated;

[0125]

[0126] Therefore, in order to simulate the specified scenario of a Herbach-type debris flow with an impact velocity of 3.5 m / s impacting a prototype umbilical with an outer diameter of 1.0 m and a span height of 1.0 m, the experimental model condition of the scaled flume model can be designed as follows: the same debris flow with a velocity of 5.33 m / s impacts a model umbilical with an outer diameter of 0.01 m and a span height of 0.01 m.

[0127] Example 2: Take the prototype working condition of power-law debris flow impacting the cable as an example.

[0128] Determine the rheological parameters of the power-law debris flow in the target sea area, where the yield stress is 0 Pa and the viscosity parameter is 165.0 Pa·s 0.13 , the liquidity index is 0.13.

[0129] The prototype working condition of power-law debris flow impacting the umbilical cable was determined: the outer diameter of the prototype umbilical cable was 1.0 m, the span height was 1.0 m, and the impact velocity of the debris flow was 3.5 m / s.

[0130] Determine the outer diameter of the model pipe and cable in the scaled flume test model condition: the outer diameter of the model pipe and cable is set to 0.01m.

[0131] According to the outer diameters of the prototype and model ducts, the length ratio can be calculated as:

[0132]

[0133] Then, the yield stress, viscosity parameter, fluidity index, length scale, impact velocity of the debris flow in the prototype working condition, and the outer diameter of the cable are substituted into the following relationship to calculate the velocity scale:

[0134]

[0135] From the above formula, the velocity ratio can be calculated to be 0.726, and the impact velocity of the debris flow in the model working condition can be calculated as:

[0136]

[0137] Based on the calculated length scale and the known span height of the prototype umbilical cable, the span height of the model umbilical cable is calculated;

[0138]

[0139] Therefore, in order to simulate the specified scenario of a power-law debris flow with an impact velocity of 3.5 m / s impacting a prototype duct with an outer diameter of 1.0 m and a span height of 1.0 m, the experimental model condition of the scaled flume model can be designed as follows: the same debris flow with a velocity of 4.82 m / s impacts a model duct with an outer diameter of 0.01 m and a span height of 0.01 m.

[0140] This embodiment provides a method for implementing a scaled-down flume experiment on submarine debris flow impacting umbilical cables. Through rigorous theoretical analysis, a similarity relationship is established between prototype and model conditions. Based on this similarity relationship and the parameter information of the prototype conditions, a similar model condition can be constructed. While ensuring similarity between the prototype and model conditions, this method features simple calculation steps, easy implementation, and excellent practicality.

[0141] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A method for implementing a scaled water tank experiment on submarine debris flow impacting umbilical cables, characterized in that: include: Obtaining the rheological parameters of the debris flow in the target sea area and the prototype working condition of the debris flow impacting the umbilical cable; wherein the rheological parameters include yield stress, viscosity parameter, and fluidity index; the prototype working condition includes the outer diameter and span height of the umbilical cable and the impact velocity of the debris flow; Determine the outer diameter of the model pipe and cable in the scaled flume test model; determining an impact velocity of the debris flow and a span height of the model umbilical cable in the model working condition based on the rheological parameters, the prototype working condition, and the outer diameter of the model umbilical cable; Constructing a scaled flume test model working condition based on the outer diameter and span height of the model umbilical and the impact velocity of the debris flow in the model working condition; The step of determining the impact velocity of the debris flow in the model working condition based on the rheological parameters, the prototype working condition and the outer diameter of the model umbilical cable comprises: Calculating a velocity scale according to the rheological parameters, the prototype working condition, and the outer diameter of the model umbilical; The impact velocity of the debris flow in the model working condition is calculated based on the velocity scale and the impact velocity of the debris flow in the prototype working condition; The step of calculating the velocity scale according to the rheological parameters, the prototype working condition and the outer diameter of the model umbilical cable comprises: Calculating a length scale according to the outer diameter of the umbilical cable in the prototype working condition and the outer diameter of the model umbilical cable; Substitute the yield stress, viscosity parameter, fluidity index, length scale, impact velocity of the debris flow in the prototype working condition, and the outer diameter of the umbilical into the following relationship to calculate the velocity scale; in, is the yield stress, is the viscosity parameter, is the liquidity index, For length ratio, is the impact velocity of the debris flow in the prototype working condition, is the outer diameter of the prototype cable, It is a speed scale.

2. The method for implementing a scaled water tank experiment according to claim 1, characterized in that: The step of determining the span height of the model umbilical cable according to the rheological parameters, the prototype working condition and the outer diameter of the model umbilical cable comprises: The free span height of the model umbilical cable is calculated based on the length scale and the free span height of the prototype umbilical cable.

3. The method for implementing a scaled water tank experiment according to claim 1, characterized in that: The step of obtaining the rheological parameters of the debris flow in the target sea area and the prototype working condition of the debris flow impacting the umbilical cable comprises: Use measuring instruments to measure the rheological parameters of debris flow in the target sea area; The prototype working condition of debris flow impacting the pipe and cable in the target sea area is determined according to the location of the target sea area.

4. The method for implementing a scaled water tank experiment according to claim 1, characterized in that: Taking the debris flow as the Herbach fluid, the above relationship is derived under the condition that the plastic Reynolds number similarity criterion is satisfied.

5. The method for implementing a scaled water tank experiment according to claim 1, characterized in that: Taking the debris flow as a power-law fluid and satisfying the similarity criterion of plastic Reynolds number, the above relationship is derived.

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