CN108916471A - A kind of the determination method and determining system of pipeline clamp installation site - Google Patents

Abstract

The invention discloses a method and a system for determining the installation position of a pipeline clamp. The determination method includes: obtaining the geometric parameters, material parameters, service environment parameters and fluid parameters of the fluid in the target pipeline; determining the clamp connection parameters and the optional installation positions of each clamp according to the service environment parameters of the target pipeline; parameters, material parameters, fluid parameters, clamp connection parameters and optional installation positions to establish the fluid-structure interaction dynamics model of the target pipeline; determine the optional position basis of the target pipeline corresponding to the optional installation positions according to the fluid-structure interaction dynamics model frequency and the first-order mode shape; determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, and the fundamental frequency difference is the difference between the fundamental frequency of the optional position and the target fundamental frequency of the target pipeline . The invention can effectively increase the natural frequency of the pipeline, improve the dynamic quality of the system, effectively avoid the occurrence of resonance, and is simple in operation, good in practicability, convenient and fast, and high in accuracy.

Description

A method and system for determining the installation position of a pipe clamp

technical field

The invention relates to the field of pipeline construction, in particular to a method and system for determining the installation position of a pipeline clamp.

Background technique

Aircraft hydraulic pipelines are mainly used for the transportation of fuel, lubricating oil, hydraulic oil and air, and are an important part of the aircraft system. The safety and reliability of the pipeline system is directly related to the safety of aircraft operation, and the failure of the pipeline system is mainly caused by vibration. When the pipeline system has been shaped, its direction and structure can no longer be changed, and the rigidity of the pipeline system can only be increased by installing clamps at the appropriate positions of the pipeline, thereby increasing its natural frequency, so that the natural frequency avoids its excitation frequency and thus avoid resonance.

However, the hydraulic piping system of the aircraft is intricate, and the layout of the clamp position is mostly compared and transplanted from the prototype. During construction, certain adjustments are made according to the actual lofting. The final installation position of the clamp greatly depends on the experience of the designer. Especially for some small pipeline systems, the support form, parameters, position and quantity of the clamps are mostly solved manually on site, resulting in a large randomness in the actual layout of the clamps. Sometimes, instead of improving the dynamic quality of the system, local stress concentration may even become the source of failure of the pipeline structure, seriously weakening the reliability of the pipeline system.

Therefore, how to determine the installation position of the clip so as to increase the natural frequency of the pipeline has become a technical problem urgently to be solved by those skilled in the art.

Contents of the invention

The purpose of the present invention is to provide a method and system for determining the installation position of pipeline clamps, which can effectively increase the natural frequency of the pipeline and improve the dynamic quality of the system without manual participation and without relying on the manual experience and subjective judgment of the operator. The operation is simple, the practicability is good, the convenience is fast and the accuracy is high.

To achieve the above object, the present invention provides the following scheme:

A method for determining the installation position of a pipe clamp, the determining method comprising:

Acquiring geometric parameters, material parameters, service environment parameters and fluid parameters of the fluid in the target pipeline, wherein the service environment parameters include vibration acceleration or stress of the target pipeline;

Determine clamp connection parameters and optional installation positions of each clamp according to service environment parameters of the target pipeline, where the clamp connection parameters include clamp stiffness and clamp damping;

Establishing a fluid-solid coupling dynamics model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position;

determining an optional fundamental frequency and a first-order mode shape of the target pipeline corresponding to the optional installation location according to the fluid-structure interaction dynamics model;

Determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, wherein the fundamental frequency difference is the difference between the fundamental frequency of the optional position and the target fundamental frequency of the target pipeline difference.

Optionally, the determining the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape specifically includes:

judging whether the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency, and obtaining a first judgment result;

When the first judgment result indicates that the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency, determining the optional installation position as the optimal installation position of each clamp;

When the first judgment result indicates that the fundamental frequency of the optional position is lower than the target fundamental frequency, updating the optional installation position of the clamp according to the position of the maximum value point of the mode shape displacement of the first-order mode shape, Return to the "establish a fluid-structure interaction dynamics model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position".

Optionally, updating the optional installation position of the clamp according to the position of the maximum value point of the mode shape displacement of the first-order mode shape specifically includes:

A clamp is added at the maximum value point of the mode shape displacement of the first order mode shape.

Optionally, the hoop stiffness includes hoop line stiffness and hoop angular stiffness, and the hoop damping includes hoop line damping and hoop angular damping.

Optionally, the geometric parameters of the target pipeline include: inner diameter, outer diameter, length and radian of the target pipeline.

A system for determining the installation position of a pipe clamp, the system for determining includes:

A parameter acquisition module, configured to acquire geometric parameters, material parameters, service environment parameters of the target pipeline and fluid parameters of the fluid in the target pipeline, wherein the service environment parameters include vibration acceleration or stress of the target pipeline;

A connection parameter and optional location determination module, configured to determine clamp connection parameters and optional installation positions of each clamp according to service environment parameters of the target pipeline, the clamp connection parameters including clamp stiffness and clamp damping;

A dynamic model establishment module, configured to establish a fluid-solid interaction dynamic model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position;

The fundamental frequency and first-order mode shape determination module is used to determine the optional position fundamental frequency and first-order mode shape of the target pipeline corresponding to the optional installation position according to the fluid-structure interaction dynamics model;

An optimal installation position determination module, configured to determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, wherein the fundamental frequency difference is the difference between the fundamental frequency and the optional position The difference between the target fundamental frequency of the target pipeline.

Optionally, the optimal installation position determination module specifically includes:

A first judging unit, configured to judge whether the base frequency of the optional position is greater than or equal to the target base frequency, and obtain a first judgment result;

An optimal installation position determining unit, configured to determine the optional installation position as the optimal installation position of each clamp when the first judgment result indicates that the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency;

A position updating unit, configured to update the clamp according to the position of the mode shape displacement maximum point of the first-order mode shape when the first judgment result indicates that the fundamental frequency of the optional position is less than the target fundamental frequency optional installation location.

Optionally, the location update unit specifically includes:

The clamp is provided with a subunit, which is used to add a clamp at the maximum value point of the mode shape displacement of the first-order mode shape.

According to the specific embodiments provided by the invention, the invention discloses the following technical effects:

The method and system for determining the installation position of pipe clamps provided by the present invention firstly determine the connection parameters of the clamps and the optional installation positions of each clamp according to the service environment parameters of the target pipeline, and then according to the geometric parameters, material parameters, fluid parameters, The clamp connection parameters and optional installation positions are used to establish the fluid-structure interaction dynamics model of the target pipeline, and the corresponding optional position fundamental frequency and first-order mode shape are determined according to the fluid-structure interaction dynamics model, and finally according to the optional position The difference between the fundamental frequency and the target fundamental frequency and the first-order mode shape automatically optimize the installation position of the clamp, so that the fundamental frequency of the pipeline reaches the target value, even if the natural frequency of the pipeline avoids its excitation frequency to avoid the occurrence of resonance . Compared with the existing method of clamp arrangement based on design experience, the determination method and determination system provided by the present invention do not require manual participation, and do not rely on the manual experience and subjective judgment of the operator. Therefore, the natural frequency of the pipeline can be effectively improved , improve the dynamic quality of the system, simple operation, good practicability, convenience and high accuracy.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work.

Fig. 1 is a flow chart of a method for determining the installation position of a pipe clamp provided in Embodiment 1 of the present invention;

Fig. 2 is the finite element model diagram of the two-end supporting space pipeline provided by Embodiment 1 of the present invention;

Fig. 3 is the first-order mode shape diagram of the two-end supporting space pipeline provided by Embodiment 1 of the present invention;

Fig. 4 is the dimensionless mode displacement diagram of each node in the first mode mode of the two-end supported pipeline provided by Embodiment 1 of the present invention;

Fig. 5 is a diagram of the fundamental frequency of space pipes supported at both ends under different clamp positions and stiffnesses provided by Embodiment 1 of the present invention;

Fig. 6 is the pipe modal analysis diagram of the three-point fixed support pipe provided by Embodiment 1 of the present invention;

Fig. 7 is the dimensionless mode displacement of each node in the first mode mode of the three-point fixed support pipeline provided by Embodiment 1 of the present invention;

Fig. 8 is a structural block diagram of a system for determining the installation position of a pipe clamp provided in Embodiment 2 of the present invention;

FIG. 9 is a working flow chart of the determination system provided by Embodiment 2 of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The purpose of the present invention is to provide a method and system for determining the installation position of pipeline clamps, which can effectively increase the natural frequency of the pipeline and improve the dynamic quality of the system without manual participation and without relying on the manual experience and subjective judgment of the operator. The operation is simple, the practicability is good, the convenience is fast and the accuracy is high.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

FIG. 1 is a flowchart of a method for determining the installation position of a pipe clamp provided by Embodiment 1 of the present invention. As shown in Figure 1, a method for determining the installation position of a pipe clamp, the method for determining includes:

Step 101: Obtain geometric parameters, material parameters, service environment parameters and fluid parameters of fluid in the target pipeline, wherein the service environment parameters include vibration acceleration or stress of the target pipeline. The geometric parameters of the target pipeline include: inner diameter, outer diameter, length and radian of the target pipeline.

Step 102: Determine clamp connection parameters and optional installation positions of each clamp according to service environment parameters of the target pipeline, where the clamp connection parameters include clamp stiffness and clamp damping. Specifically, the hoop stiffness includes the hoop line stiffness in the x-axis, y-axis, and z-axis directions and the hoop angular stiffness around the x-axis, y-axis, and z-axis directions, and the hoop damping includes the x-axis, y-axis Clamp line damping in the direction of the axis and z axis and angle damping in the direction of the x axis, y axis and z axis.

Step 103: Establish a fluid-structure interaction dynamic model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position.

Among them, the modeling methods of fluid-structure interaction dynamics model mainly include solid modeling and modeling based on CATIA model.

(1) Solid modeling is mainly aimed at the actual model of the pipeline, according to the geometric parameters of the key points of the pipeline, including inner and outer diameters, lengths, radians, material parameters, fluid parameters, etc., to complete the fluid-solid coupling dynamics modeling of the pipeline.

(2) CATIA-based model modeling is mainly based on CATIA software to export the wrl format file, decode the VRML language of the wrl file and calculate the key point information of the pipeline, and establish the fluid-solid coupling dynamics model of the pipeline.

The finite element model of the space pipeline established in this embodiment is shown in Figure 2, which consists of 4 straight pipes and 3 curved pipes. The specific dimensions of the pipeline are: length L1 of pipeline 1 = 530mm, length L2 of pipeline 2 = 930mm, length L3 of pipeline 3 = 520mm, length L4 of pipeline 4 = 880mm, the outer diameter of the pipeline is 21mm, and the wall thickness of the pipeline is 2.4 mm. The material parameters of the pipeline are: the density is 7850kg/m ³ , the Young's modulus is 2×10 ¹¹ N/m ² , and the Poisson's ratio is 0.3. The pipeline is discretized into 22 units, with a total of 23 nodes. Let S1 and S2 be fixed support points at both ends of the pipeline, which are arranged at node 1 and node 23 respectively.

Step 104: Determine the fundamental frequency and first-order mode shape of the target pipeline corresponding to the optional installation location according to the fluid-structure interaction dynamics model.

By solving the fluid-solid coupling dynamic model of the pipeline system, the natural frequency and natural mode shape of the pipeline can be obtained, and the fundamental frequency and first-order mode shape of the pipeline can be obtained.

Step 105: Determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, wherein the fundamental frequency difference is the fundamental frequency of the optional position and the target of the target pipeline difference in fundamental frequency.

Specifically, step 105: determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, specifically including:

judging whether the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency, and obtaining a first judgment result;

When the first judgment result indicates that the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency, determining the optional installation position as the optimal installation position of each clamp;

When the first judgment result indicates that the fundamental frequency of the optional position is lower than the target fundamental frequency, updating the optional installation position of the clamp according to the position of the maximum value point of the mode shape displacement of the first-order mode shape, Returning to step 103: establishing a fluid-structure interaction dynamics model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position. Wherein, updating the optional installation position of the clamp according to the position of the maximum value point of the mode shape displacement of the first-order mode shape, specifically includes: A clamp is added at the value point.

By applying a large number of clamps with different positions and quantities, the fundamental frequency and first-order mode shape of the pipeline can be obtained, and the influence law of the position and quantity of the clamps on the fundamental frequency of the pipeline can be found: the modal displacement poles of all adjacent fixed support points of the pipeline When the clamp is applied at a large value, the fundamental frequency of the pipeline will reach the maximum value. In this case, the optimal position and quantity of the clamp can be obtained. The specific process is as follows:

(1) The case where both ends are fixed supports

In order to maximize the fundamental frequency of the pipeline, it is necessary to study the sensitivity of the position of the clamp to the fundamental frequency of the pipeline, and obtain the optimal position of the clamp for the pipeline. The modal analysis of the pipeline under this support condition shows that the fundamental frequency of the pipeline is 12.21Hz, and the first-order vibration shape is shown in Figure 3. Figure 4 shows the dimensionless mode shape displacement of each node in the first order mode shape. In order to obtain the law of the influence of the position of the clamp on the fundamental frequency of the pipeline, clamps with different stiffnesses applied at different positions are selected. Table 1 and Figure 5 both show the change of the fundamental frequency under different positions and stiffness clamps. It can be seen from the calculation results that:

1) Applying a clamp at the node with the largest dimensionless mode shape displacement can increase the fundamental frequency to the greatest extent, which is the optimal position for applying a single clamp;

2) The stiffness of the clamp is above 10 ⁶ N/m, and the calculated results are basically close, that is, it can be considered as a fixed support.

Table 1 Fundamental frequency unit under different positions and stiffness of the clamp: Hz

(2) The case of three-point fixed support

In the case where both ends are fixed, the optimal clamp position is the position where the displacement of the first order mode is the largest, and a fixed support S3 is set at this position (node 12), that is, the optimized clamp is set, and the clamp stiffness is 10 ⁸ N/m, as shown in part (a) of Figure 6. The modal analysis of the pipeline under the three-point fixed support is carried out. The fundamental frequency of the pipeline is 30.26Hz, and the first-order mode shape is shown in part (b) of Fig. 6. In order to further increase the fundamental frequency of the pipeline, it is necessary to continue to increase the clamps, and now it is necessary to solve the problem of how to maximize the fundamental frequency of the pipeline with the least number of clamps.

Figure 7 shows the dimensionless mode displacement of each node in the first order mode shape. It can be seen from the mode shape diagram that two maximum points appear between the three fixed points. According to the analysis results of the pipeline under two-point fixation, it can be imagined that in order to further increase the fundamental frequency of the pipeline to the greatest extent, a clamp can be applied at the maximum point of the vibration mode displacement between every two clamp fixed points, that is, at Two clamps need to be applied at the same time under the three fixing points.

For further verification, the inventor calculated and compared the fundamental frequency of the pipeline with two clamps applied at different positions at the same time, one clamp was added between node 2 and node 11, and the other was added between node 13 and node 22, The clamp stiffness is set to 10 ⁸ N/m. Table 2 shows the fundamental frequency of the pipeline under different clamp positions and stiffness. From the calculation results in Table 2, it can be seen that when three points are fixed without clamps, the fundamental frequency is 30.26 Hz; when three points are fixed and two clamps are applied, the fundamental frequency of the pipeline is increased to 110.67 Hz at most, and the position of the clamps corresponds to The two maximum points of the first-order mode displacement are node 7 and node 18, which are completely consistent with the optimal position of the clamp proposed in the assumption. From this, it can be concluded that the modal displacement maximum point of the two fixed support points is the optimal clamp position point to further increase the fundamental frequency of the pipeline.

Table 2 Fundamental frequency unit under different positions and stiffness of the clamp: Hz

It can be seen that the method for determining the installation position of the pipe clamp provided by the present invention does not require manual participation and does not rely on the manual experience and subjective judgment of the operator. Therefore, the natural frequency of the pipe can be effectively improved, the dynamic quality of the system can be improved, and the operation is simple. The utility model has the advantages of good practicability, convenience, quickness and high accuracy. At the same time, the invention can complete the rapid finite element modeling of the pipeline, and has great engineering application value for relevant detection of aviation pipelines. Furthermore, the determination method provided by the present invention has high visibility, and has good graphic display effects for the three-dimensional model of the pipeline, the clamp application position, the vibration mode shape, and the like.

Example 2:

Fig. 8 is a structural block diagram of a system for determining the installation position of a pipe clamp provided by Embodiment 2 of the present invention. Fig. 9 is a work flow diagram of the system for determining the installation position of the pipe clamp. As shown in Figure 8 and Figure 9, a system for determining the installation position of pipe clamps, the determination system includes:

A parameter acquisition module 201, configured to acquire geometric parameters, material parameters, service environment parameters and fluid parameters of the fluid in the target pipeline, wherein the service environment parameters include vibration acceleration or stress of the target pipeline;

Connection parameter and optional position determination module 202, configured to determine clamp connection parameters and optional installation positions of each clamp according to the service environment parameters of the target pipeline, the clamp connection parameters include clamp stiffness and clamp damping ;

A dynamic model establishment module 203, configured to establish a fluid-solid coupling dynamic model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position ;

Fundamental frequency and first-order mode shape determination module 204, configured to determine the optional location fundamental frequency and first-order mode shape of the target pipeline corresponding to the optional installation location according to the fluid-structure interaction dynamics model ;

An optimal installation position determination module 205, configured to determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, wherein the fundamental frequency difference is the fundamental frequency of the optional position The difference from the target fundamental frequency of the target pipeline.

Specifically, the optimal installation position determination module 205 specifically includes:

A first judging unit, configured to judge whether the base frequency of the optional position is greater than or equal to the target base frequency, and obtain a first judgment result;

An optimal installation position determining unit, configured to determine the optional installation position as the optimal installation position of each clamp when the first judgment result indicates that the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency;

A position updating unit, configured to update the clamp according to the position of the mode shape displacement maximum point of the first-order mode shape when the first judgment result indicates that the fundamental frequency of the optional position is less than the target fundamental frequency optional installation location. Wherein, the location update unit specifically includes:

The clamp is provided with a subunit, which is used to add a clamp at the maximum value point of the mode shape displacement of the first-order mode shape.

It can be seen that the system for determining the installation position of pipe clamps provided by the present invention can carry out finite element modeling for fixed-type pipelines, determine the joint stiffness and installation position of the clamps according to the actual installation conditions, and perform modal analysis on the established pipelines to obtain the inherent characteristics of the pipelines. Frequency and natural vibration mode, conduct modal analysis on a large number of pipes with different positions and numbers of clamps, and obtain the law of influence of clamp position and quantity on the fundamental frequency of the pipeline. According to this law, automatic optimization of the clamps is carried out, and the fundamental frequency is determined according to the target Optimal position and amount of clamp application.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

In this paper, specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the present invention Thoughts, there will be changes in specific implementation methods and application ranges. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (8)

1. A method for determining the installation position of a pipe clamp, characterized in that the method for determining comprises: Acquiring geometric parameters, material parameters, service environment parameters and fluid parameters of the fluid in the target pipeline, wherein the service environment parameters include vibration acceleration or stress of the target pipeline; Determine clamp connection parameters and optional installation positions of each clamp according to service environment parameters of the target pipeline, where the clamp connection parameters include clamp stiffness and clamp damping; Establishing a fluid-solid coupling dynamics model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position; determining an optional fundamental frequency and a first-order mode shape of the target pipeline corresponding to the optional installation location according to the fluid-structure interaction dynamics model; Determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, wherein the fundamental frequency difference is the difference between the fundamental frequency of the optional position and the target fundamental frequency of the target pipeline difference. 2. The determination method according to claim 1, wherein the determination of the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape specifically includes: judging whether the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency, and obtaining a first judgment result; When the first judgment result indicates that the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency, determining the optional installation position as the optimal installation position of each clamp; When the first judgment result indicates that the fundamental frequency of the optional position is lower than the target fundamental frequency, updating the optional installation position of the clamp according to the position of the maximum value point of the mode shape displacement of the first-order mode shape, Return to the "establish a fluid-structure interaction dynamics model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position". 3. The determination method according to claim 2, wherein the optional installation position of the clamp is updated according to the position of the maximum value point of the mode shape displacement of the first-order mode shape, specifically comprising: A clamp is added at the maximum value point of the mode shape displacement of the first order mode shape. 4. The determination method according to claim 1, wherein the hoop stiffness includes hoop line stiffness and hoop angular stiffness, and the hoop damping includes hoop line damping and hoop angular damping. 5. The determination method according to claim 1, wherein the geometric parameters of the target pipeline include: inner diameter, outer diameter, length and radian of the target pipeline. 6. A system for determining the installation position of pipe clamps, characterized in that the system for determining comprises: A parameter acquisition module, configured to acquire geometric parameters, material parameters, service environment parameters of the target pipeline and fluid parameters of the fluid in the target pipeline, wherein the service environment parameters include vibration acceleration or stress of the target pipeline; A connection parameter and optional location determination module, configured to determine clamp connection parameters and optional installation positions of each clamp according to service environment parameters of the target pipeline, the clamp connection parameters including clamp stiffness and clamp damping; A dynamic model establishment module, configured to establish a fluid-solid interaction dynamic model of the target pipeline according to the geometric parameters, the material parameters, the fluid parameters, the clamp connection parameters and the optional installation position; The fundamental frequency and first-order mode shape determination module is used to determine the optional position fundamental frequency and first-order mode shape of the target pipeline corresponding to the optional installation position according to the fluid-structure interaction dynamics model; An optimal installation position determination module, configured to determine the optimal installation position of the clamp according to the fundamental frequency difference and the first-order mode shape, wherein the fundamental frequency difference is the difference between the fundamental frequency and the optional position The difference between the target fundamental frequency of the target pipeline. 7. The determination system according to claim 6, wherein the optimal installation position determination module specifically comprises: A first judging unit, configured to judge whether the base frequency of the optional position is greater than or equal to the target base frequency, and obtain a first judgment result; An optimal installation position determining unit, configured to determine the optional installation position as the optimal installation position of each clamp when the first judgment result indicates that the fundamental frequency of the optional position is greater than or equal to the target fundamental frequency; A position updating unit, configured to update the clamp according to the position of the mode shape displacement maximum point of the first-order mode shape when the first judgment result indicates that the fundamental frequency of the optional position is less than the target fundamental frequency optional installation location. 8. The determining system according to claim 7, wherein the location updating unit specifically comprises: The clamp is provided with a subunit, which is used to add a clamp at the maximum value point of the mode shape displacement of the first-order mode shape.