A method and system for simulating the boundary of pipe space tilt and angular displacement based on deformation equivalent.

Abstract

This invention provides a method and system for simulating the spatial tilt and angular displacement boundaries of pipelines using deformation equivalence. The method includes: Step S1: Calculating the deformation value of the pipeline support under the actual product connection state, subjected to the internal pressure load of the pipeline and the constraints of the foundation, using the finite element analysis method; Step S2: Decomposing the deformation value according to the local coordinate system of the pipeline simulation boundary, and applying spatial tilt and angular displacement to the pipeline accordingly; Step S3: Adjusting and monitoring the displacement count value using displacement loading bolts to complete the simulation of the spatial tilt and angular displacement boundaries of the pipeline, while simultaneously limiting the pipeline. This invention can meet the displacement boundary simulation requirements of complex pipeline ground tests, ensuring efficient and safe testing while obtaining accurate and sufficient test data; relying on the test data to comprehensively understand the strength change process of various parts of the pipeline structure, solving the structural design and strength assessment problems in model development.

Description

Technical Field

[0001] This invention relates to the field of aerospace pipeline structure testing, specifically to a method and system for simulating the spatial tilt and angular displacement boundaries of pipelines based on deformation equivalence, and more particularly to a method and system for simulating the spatial tilt and angular displacement boundaries of complex pipelines based on deformation equivalence. Background Technology

[0002] As spacecraft performance indicators continue to improve, the load-bearing requirements for pipeline structures and the installation and loading requirements for tests are becoming increasingly stringent. During pressurization and launch vehicle flight, the connecting ends of the pipelines will displace, and the pipelines will deform. To realistically and comprehensively assess the actual load conditions of the pipeline structure, tests must employ realistic and effective installation and loading methods during ground-based load simulations. For complex pipeline structures, due to space constraints and relatively small thrust displacement loading values, installation and thrust displacement loading present significant challenges. Therefore, it is necessary to determine a spatial tilt and angular displacement boundary simulation method based on the load characteristics of complex pipeline structures.

[0003] Patent document CN117489866A discloses an aerospace pipeline and module, as well as an installation method for the aerospace pipeline. It uses splicing pipes to form a ring pipeline at the installation location of the module, avoiding the technical problem that the finished pipeline cannot be fitted into the installation due to changes in the outer diameter of the module. At the same time, a connecting groove is set at the end of each splicing pipe, and the splicing pipes are welded together through the connecting groove. Then, a cover plate is welded on the connecting groove to ensure the normal pressure resistance requirements of the welded structure. However, the technical means used in this patent document are fundamentally different from those of this invention.

[0004] This invention aims to propose a method for simulating the spatial tilt and angular displacement boundaries of complex pipelines based on deformation equivalence, which can meet the displacement boundary simulation requirements of ground tests on complex pipelines. This ensures efficient and safe testing while obtaining accurate and sufficient experimental data. By relying on the experimental data, a comprehensive understanding of the strength variation process of various parts of the pipeline structure can be achieved, solving structural design and strength assessment problems in model development. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a method and system for simulating the boundary of pipeline space tilt and angular displacement based on deformation equivalence.

[0006] A method for simulating the boundary of pipeline space tilt and angular displacement based on deformation equivalent, according to the present invention, includes:

[0007] Step S1: Calculate the deformation value of the pipe support under the actual product connection state, subjected to the internal pressure load of the pipe and the constraint of the foundation, using the finite element analysis method;

[0008] Step S2: Decompose the deformation value according to the local coordinate system of the pipeline simulation boundary, and apply spatial tilt and angular displacement to the pipeline accordingly;

[0009] Step S3: Use displacement loading bolts to adjust and monitor displacement count values ​​to simulate the boundary of pipeline space tilt and angular displacement, and at the same time limit the pipeline.

[0010] Preferred options also include:

[0011] Step S4: Based on the actual pipeline configuration, install the pipeline simulation boundary and pipeline on the modular base fixture, adjust the pipeline simulation displacement boundary and conduct tests to verify the pipeline configuration design.

[0012] Preferably, the pipeline simulation boundary includes a fixed fixture, a sliding fixture, a corner and sealing fixture, a displacement loading bolt, a clamping bolt, and a displacement gauge;

[0013] The fixture is provided with a waist-shaped hole for fixing fixture, which can guide translational displacement and realize pipeline translational displacement loading.

[0014] The fixing fixture is also provided with support holes for installing displacement loading bolts;

[0015] The sliding fixture is provided with a sliding fixture waist-shaped hole and a cylindrical rotating shaft, which guide the translational displacement and angular displacement respectively, so as to realize the loading of the pipeline translational displacement and angular displacement.

[0016] The corner and sealing fixture is provided with an annular waist-shaped hole and a cylindrical groove, which cooperate with the cylindrical rotating shaft on the sliding fixture to guide the corner displacement.

[0017] The corner and sealing fixture is also provided with a sealing port, which cooperates with the end face of the pipeline to achieve pipeline sealing;

[0018] The pipeline is connected to the corner and the sealing fixture by connecting bolts.

[0019] Preferably, step S3 includes the following sub-steps:

[0020] Step S3.1: Adjust the translational and angular displacements of the sliding fixture and the sealing fixture by means of the displacement loading bolts, and monitor the translational displacement values ​​by means of a displacement gauge;

[0021] Step S3.2: Use clamping bolts to fasten the fixed fixture, sliding fixture, and corner and sealing fixture to meet the limit requirements of pipeline displacement boundary simulation.

[0022] Preferably, the angular displacement is obtained by converting trigonometric functions:

[0023] ;

[0024] Where α is the rotation angle, and U is the translational displacement applied by the displacement loading bolt. l The length of the fixture is fixed on the side of the loading bolt.

[0025] A deformation-equivalent pipeline space tilt and angular displacement boundary simulation system provided by the present invention includes:

[0026] Module M1: Uses finite element analysis to calculate the deformation of pipe supports under actual product connection conditions, subjected to internal pipe pressure loads and foundation constraints;

[0027] Module M2: Decomposes the deformation value according to the local coordinate system of the pipeline simulation boundary, and applies spatial tilt and angular displacement to the pipeline accordingly;

[0028] Module M3: Uses displacement loading bolts to adjust and monitor displacement count values ​​to simulate the boundary of pipeline space tilt and angular displacement, while limiting the pipeline.

[0029] Preferred options also include:

[0030] Module M4: Based on the actual pipeline configuration, install the pipeline simulation boundary and pipeline on the modular base fixture, adjust the pipeline simulation displacement boundary and conduct tests to verify the pipeline configuration design.

[0031] Preferably, the pipeline simulation boundary includes a fixed fixture, a sliding fixture, a corner and sealing fixture, a displacement loading bolt, a clamping bolt, and a displacement gauge;

[0032] The fixture is provided with a waist-shaped hole for fixing fixture, which can guide translational displacement and realize pipeline translational displacement loading.

[0033] The fixing fixture is also provided with support holes for installing displacement loading bolts;

[0034] The sliding fixture is provided with a sliding fixture waist-shaped hole and a cylindrical rotating shaft, which guide the translational displacement and angular displacement respectively, so as to realize the loading of the pipeline translational displacement and angular displacement.

[0035] The corner and sealing fixture is provided with an annular waist-shaped hole and a cylindrical groove, which cooperate with the cylindrical rotating shaft on the sliding fixture to guide the corner displacement.

[0036] The corner and sealing fixture is also provided with a sealing port, which cooperates with the end face of the pipeline to achieve pipeline sealing;

[0037] The pipeline is connected to the corner and the sealing fixture by connecting bolts.

[0038] Preferably, module M3 includes the following sub-modules:

[0039] Module M3.1: Adjusts the translational and angular displacements of the sliding fixture and the sealing fixture by means of displacement loading bolts, and monitors the translational displacement values ​​by means of displacement gauges;

[0040] Module M3.2: The fixed fixture, sliding fixture, and corner and sealing fixture are fastened with clamping bolts to meet the limit requirements of pipeline displacement boundary simulation.

[0041] Preferably, the angular displacement is obtained by converting trigonometric functions:

[0042] ;

[0043] Where α is the rotation angle, and U is the translational displacement applied by the displacement loading bolt. l The length of the fixture is fixed on the side of the loading bolt.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] 1. The method for simulating the inclination and angular displacement boundary of complex pipeline space based on deformation equivalence provided by the present invention uses the finite element analysis method to calculate the deformation of pipeline support under the action of internal pipeline pressure load and foundation constraint in the actual product connection state; through pipeline simulation boundary design, quantitative loading of pipeline inclination and angular displacement is realized in a narrow installation space, while meeting the sealing and limiting requirements.

[0046] 2. This invention proposes a method for simulating the spatial tilt and angular displacement boundaries of complex pipelines based on deformation equivalence. This method can meet the displacement boundary simulation requirements of ground tests on complex pipelines. While ensuring efficient and safe testing, it can obtain accurate and sufficient test data. By relying on the test data, we can comprehensively understand the strength change process of various parts of the pipeline structure and solve the structural design and strength assessment problems in model development.

[0047] 3. The method provided by this invention is simple to develop, convenient to operate during the test process, accurate in test simulation, and reusable. It can effectively simulate the actual service state of the pipeline during the injection and pressurization process, ensuring the authenticity and reliability of the test. Attached Figure Description

[0048] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0049] Figure 1 This is a schematic diagram of the numerical calculation method for pipeline boundary inclination and angular displacement based on finite element analysis in this invention.

[0050] Figure 2 This is a schematic diagram of the pipeline simulation boundary design in this invention.

[0051] Figure 3 This is a schematic diagram of the fixing fixture for simulating the boundary of the pipeline in this invention.

[0052] Figure 4 This is a schematic diagram of the sliding fixture for simulating the boundary of the pipeline in this invention.

[0053] Figure 5 This is a schematic diagram of the corner and sealing fixture of the pipeline simulation boundary in this invention.

[0054] Figure 6 This is a schematic diagram of the overall installation of the pipeline test embodiment in this invention.

[0055] Figure 7 This is a flowchart of the method of the present invention.

[0056] Explanation of reference numerals in the attached figures

[0057] Detailed Implementation

[0058] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0059] The purpose of this invention is to provide a method for simulating the spatial tilt and angular displacement boundaries of complex pipelines based on deformation equivalence. First, the finite element method is used to calculate the deformation of the pipeline support 2 under the actual product connection state, subjected to the internal pressure load of the pipeline 1 and the foundation constraint 3. Then, the deformation is decomposed according to the local coordinate system of the pipeline simulation boundary, and spatial tilt and angular displacement are applied to the pipeline 1 accordingly. The pipeline simulation boundary includes a fixed fixture 4, a sliding fixture 5, an angular and sealing fixture 6, a displacement loading bolt 7, a clamping bolt 8, and a displacement gauge 9. Finally, the displacement loading bolt 7 is used for adjustment, and the value of the displacement gauge 9 is monitored to realize the simulation of the spatial tilt and angular displacement boundaries of complex pipelines, while simultaneously limiting the movement of the pipeline 1.

[0060] The specific steps are as follows:

[0061] Step S1: Calculate the deformation value of the pipe support under the actual product connection state, subjected to the internal pressure load of the pipe and the constraint of the foundation, using the finite element analysis method;

[0062] (Numerical values ​​of pipe boundary inclination and angular displacement based on finite element analysis)

[0063] First, establish the complex pipeline 1, pipeline support 2, and the basic constraint 3 of the actual product on the pipeline support 2; then calculate the deformation of the pipeline support 2 under the action of the internal pressure load of the pipeline 1 and the basic constraint 3 when connected to the actual product; finally, decompose the deformation according to the local coordinate system of the pipeline simulation boundary, and apply spatial tilt and angular displacement to the pipeline 1 accordingly.

[0064] Step S2: Decompose the deformation value according to the local coordinate system of the pipeline simulation boundary, and apply spatial tilt and angular displacement to the pipeline accordingly;

[0065] (Pipeline simulation boundary design)

[0066] The simulated pipeline boundary includes a fixed fixture 4, a sliding fixture 5, a corner and sealing fixture 6, a displacement loading bolt 7, a clamping bolt 8, and a displacement gauge 9. The fixed fixture 4 has a waist-shaped hole 10 for guiding translational displacement, thus achieving translational displacement loading of pipeline 1. The sliding fixture 5 has a waist-shaped hole 12 and a cylindrical shaft 13 for guiding translational and angular displacement, respectively, thus achieving translational and angular displacement loading of pipeline 1. The corner and sealing fixture 6 has a cylindrical groove 15 that mates with the cylindrical shaft 13 on the sliding fixture 5 for guiding angular displacement. The corner and sealing fixture 6 also has a sealing port 16 that mates with the end face of pipeline 1 to seal pipeline 1. Pipeline 1 is connected to the corner and sealing fixture 6 via connecting bolts 17.

[0067] Step S3: Adjust and monitor the displacement count value using the displacement loading bolt to complete the simulation of the pipeline space tilt and angular displacement boundary, and at the same time limit the pipeline.

[0068] (Translational and rotational displacement loading)

[0069] The method for loading translational and angular displacements first involves adjusting the translational and angular displacements of the sliding fixture 5 and the angular and sealing fixture 6 using the displacement loading bolt 7; then, the translational displacement value is monitored using the displacement gauge 9, and the angular displacement can be calculated using trigonometric functions; finally, the fixing fixture 4, the sliding fixture 5, and the angular and sealing fixture 6 are tightened using the clamping bolt 8 to meet the limit requirements of the displacement boundary simulation of pipeline 1.

[0070] The displacement of the fixed fixture 4 is directly monitored by the displacement gauge 9, and the rotational displacement α is calculated by trigonometric function relationship, thereby realizing the equivalent simulation of three-dimensional deformation.

[0071] The above are basic embodiments of the present invention. The following is a preferred embodiment to further illustrate the solution of the present invention.

[0072] Example 1

[0073] like Figure 7As shown, a method for simulating the boundary conditions of pipeline space tilt and angular displacement based on deformation equivalent includes:

[0074] Step S1: Calculate the deformation value of the pipe support under the actual product connection state, subjected to the internal pressure load of the pipe and the constraint of the foundation, using the finite element analysis method;

[0075] (Numerical values ​​of pipe boundary inclination and angular displacement based on finite element analysis)

[0076] Step S1.1: Establish the basic constraints 3 of the complex pipeline 1, pipeline support 2, and the actual product on the pipeline support 2, such as... Figure 1 As shown in (a).

[0077] Step S1.2: Calculate the deformation of pipe support 2 under the actual product connection state, subjected to the internal pressure load of pipe 1 and the constraint of foundation 3, as follows: Figure 1 (b) Figure 1 (c) Figure 1 As shown in (d); the deformation is decomposed according to the local coordinate system of the pipeline simulation boundary. , , , α Based on this, spatial tilt and angular displacement are applied to pipeline 1.

[0078] in, Let X be the translational displacement along X'. For the translational displacement along Y', Let α be the translational displacement along Z', and α be the rotational displacement.

[0079] Step S2: Decompose the deformation value according to the local coordinate system of the pipeline simulation boundary, and apply spatial tilt and angular displacement to the pipeline accordingly;

[0080] (Pipeline simulation boundary design)

[0081] The pipeline simulation boundary includes a fixed fixture 4, a sliding fixture 5, a corner and sealing fixture 6, a displacement loading bolt 7, a clamping bolt 8, and a displacement gauge 9, as shown below. Figure 2 As shown. The fixed fixture 4 has a waist-shaped hole 10 for guiding translational displacement, thus achieving translational displacement loading of the pipeline 1; the fixed fixture 4 has a support hole 11 for installing the displacement loading bolt 7, such as... Figure 3 As shown. The sliding fixture 5 has a sliding fixture waist-shaped hole 12 and a cylindrical rotating shaft 13, which can guide translational and angular displacement respectively, so as to realize the translational and angular displacement loading of pipeline 1, as shown. Figure 4 As shown. The corner and sealing fixture 6 has an annular waist-shaped hole 14 and a cylindrical groove 15, which cooperate with the cylindrical rotating shaft 13 on the sliding fixture 5 to guide the corner displacement, as shown. Figure 5As shown; and the corner and sealing fixture 6 has a sealing port 16, which mates with the end face of the pipeline 1 to achieve a seal on the pipeline 1; the pipeline 1 is connected to the corner and sealing fixture 6 by connecting bolts 17, as shown. Figure 2 As shown.

[0082] Step S3: Adjust and monitor the displacement count value using the displacement loading bolt to complete the simulation of the pipeline space tilt and angular displacement boundary, and at the same time limit the pipeline.

[0083] (Translational and rotational displacement loading)

[0084] Step S3.1: Adjust the translational and angular displacements of the sliding fixture 5, the rotation angle and the sealing fixture 6 by using the displacement loading bolt 7; monitor the translational displacement value using the displacement gauge 9.

[0085] Angular displacement can be calculated using trigonometric functions:

[0086] .

[0087] Where α is the rotation angle, and U is the translational displacement applied by the displacement loading bolt. l For the length of the fixing tool on the loading bolt side, including l x and l z, l x represents the length of the fixing fixture on the side where the displacement loading bolt 7 of the sealing fixture 6 is located, used to adjust the rotation angle. l z represents the length of the fixed fixture on the side where the displacement loading bolt 7 of the sliding fixture 5 is located.

[0088] Step S3.2: Use clamping bolts 8 to fasten the fixed fixture 4, sliding fixture 5, corner and sealing fixture 6 to meet the limit requirements of pipeline displacement boundary simulation.

[0089] Step S4: Based on the actual pipeline configuration, install the pipeline simulation boundary and pipeline on the modular base fixture, adjust the pipeline simulation displacement boundary and conduct tests to verify the pipeline configuration design.

[0090] (Build a test platform based on the actual pipeline configuration)

[0091] According to one embodiment of the present invention, firstly, according to the actual pipeline configuration, the pipeline simulation boundary and the actual pipeline 1 are installed using the modular base fixture 18, such as... Figure 6 As shown. Then, the pipeline displacement boundary was adjusted to meet the test loading requirements. Finally, the test was conducted to verify the pipeline configuration design.

[0092] The present invention also provides a deformation equivalent pipeline space tilt and angular displacement boundary simulation system. The deformation equivalent pipeline space tilt and angular displacement boundary simulation system can be implemented by executing the process steps of the deformation equivalent pipeline space tilt and angular displacement boundary simulation method. That is, those skilled in the art can understand the deformation equivalent pipeline space tilt and angular displacement boundary simulation method as a preferred embodiment of the deformation equivalent pipeline space tilt and angular displacement boundary simulation system.

[0093] Specifically, a deformation-equivalent pipeline space tilt and angular displacement boundary simulation system includes:

[0094] Module M1: Uses finite element analysis to calculate the deformation of pipe supports under actual product connection conditions, subjected to internal pipe pressure loads and foundation constraints;

[0095] Module M2: Decomposes the deformation value according to the local coordinate system of the pipeline simulation boundary, and applies spatial tilt and angular displacement to the pipeline accordingly;

[0096] Module M3: Uses displacement loading bolts to adjust and monitor displacement count values ​​to simulate the boundary of pipeline space tilt and angular displacement, while limiting the pipeline.

[0097] Also includes:

[0098] Module M4: Based on the actual pipeline configuration, install the pipeline simulation boundary and pipeline on the modular base fixture, adjust the pipeline simulation displacement boundary and conduct tests to verify the pipeline configuration design.

[0099] The pipeline simulation boundary includes fixed fixtures, sliding fixtures, corner and sealing fixtures, displacement loading bolts, clamping bolts, and displacement gauges;

[0100] The fixture is provided with a waist-shaped hole for fixing fixture, which can guide translational displacement and realize pipeline translational displacement loading.

[0101] The fixing fixture is also provided with support holes for installing displacement loading bolts;

[0102] The sliding fixture is provided with a sliding fixture waist-shaped hole and a cylindrical rotating shaft, which guide the translational displacement and angular displacement respectively, so as to realize the loading of the pipeline translational displacement and angular displacement.

[0103] The corner and sealing fixture is provided with an annular waist-shaped hole and a cylindrical groove, which cooperate with the cylindrical rotating shaft on the sliding fixture to guide the corner displacement.

[0104] The corner and sealing fixture is also provided with a sealing port, which cooperates with the end face of the pipeline to achieve pipeline sealing;

[0105] The pipeline is connected to the corner and the sealing fixture by connecting bolts.

[0106] The module M3 includes the following sub-modules:

[0107] Module M3.1: Adjusts the translational and angular displacements of the sliding fixture and the sealing fixture by means of displacement loading bolts, and monitors the translational displacement values ​​by means of displacement gauges;

[0108] Module M3.2: The fixed fixture, sliding fixture, and corner and sealing fixture are fastened with clamping bolts to meet the limit requirements of pipeline displacement boundary simulation.

[0109] The rotational displacement is obtained by conversion using trigonometric functions:

[0110] ;

[0111] Where α is the rotation angle, and U is the translational displacement applied by the displacement loading bolt. l The length of the fixture is fixed on the side of the loading bolt.

[0112] Those skilled in the art will understand that, besides implementing the system and its various devices, modules, and units provided by this invention in the form of purely computer-readable program code, the same functions can be achieved entirely through logical programming of the method steps, making the system and its various devices, modules, and units of this invention function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers. Therefore, the system and its various devices, modules, and units provided by this invention can be considered as a hardware component, and the devices, modules, and units included therein for implementing various functions can also be considered as structures within the hardware component; alternatively, the devices, modules, and units for implementing various functions can be considered as both software modules implementing the method and structures within the hardware component.

[0113] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A method for simulating the boundary of pipe space tilt and angular displacement using deformation equivalents, characterized in that, include: Step S1: Calculate the deformation value of the pipe support (2) under the actual product connection state, under the action of the internal pressure load of the pipe (1) and the foundation constraint (3); Step S2: Decompose the deformation value according to the local coordinate system of the pipeline simulation boundary, and apply spatial tilt and angular displacement to the pipeline (1) accordingly; Step S3: Use the displacement loading bolt (7) to adjust and monitor the value of the displacement gauge (9) to complete the simulation of the pipeline space tilt and angular displacement boundary, and at the same time limit the pipeline (1); Step S3.1: Adjust the translational and rotational displacements of the sliding fixture (5) and the corner and sealing fixture (6) by using the displacement loading bolt (7), and monitor the translational displacement values ​​using the displacement gauge (9); Step S3.2: Use clamping bolts (8) to fasten the fixed fixture (4), sliding fixture (5) and corner and sealing fixture (6) to meet the limit requirements of pipeline displacement boundary simulation; Step S4: Based on the actual pipeline configuration, install the pipeline simulation boundary and pipeline (1) on the modular base fixture (18), adjust the pipeline simulation displacement boundary and conduct tests to verify the pipeline configuration design.

2. The method for simulating the boundary of pipeline space tilt and angular displacement based on deformation equivalent as described in claim 1, characterized in that, The pipeline simulation boundary includes a fixed fixture (4), a sliding fixture (5), a corner and sealing fixture (6), a displacement loading bolt (7), a clamping bolt (8), and a displacement gauge (9); The fixed fixture (4) is provided with a waist-shaped hole (10) for the fixed fixture, which can guide the translational displacement and realize the translational displacement loading of the pipeline (1); The fixed fixture (4) is also provided with a support hole (11) for installing a displacement loading bolt (7). The sliding fixture (5) is provided with a sliding fixture waist-shaped hole (12) and a cylindrical rotating shaft (13), which respectively guide the translational displacement and the angular displacement, so as to realize the translational displacement and angular displacement loading of the pipeline (1); The corner and sealing fixture (6) is provided with an annular waist-shaped hole (14) and a cylindrical groove (15), which cooperate with the cylindrical rotating shaft (13) on the sliding fixture (5) to guide the corner displacement; The corner and sealing fixture (6) is also provided with a sealing port (16), which cooperates with the end face of the pipeline (1) to achieve the sealing of the pipeline (1); The pipeline (1) is connected to the corner and the sealing fixture (6) by connecting bolts (17).

3. The method for simulating the boundary of pipeline space tilt and angular displacement based on deformation equivalent as described in claim 1, characterized in that, The rotational displacement is obtained by conversion using trigonometric functions: ； Where α is the rotation angle, and U is the translational displacement applied by the displacement loading bolt. l The length of the fixture is fixed on the side of the loading bolt.

4. A deformation-equivalent pipeline space tilt and angular displacement boundary simulation system, characterized in that, include: Module M1: The finite element analysis method is used to calculate the deformation value of the pipe support (2) under the actual product connection state, under the action of the internal pressure load of the pipe (1) and the foundation constraint (3); Module M2: Decompose the deformation value according to the local coordinate system of the pipeline simulation boundary, and apply spatial tilt and angular displacement to the pipeline (1) accordingly; Module M3: Use the displacement loading bolt (7) to adjust and monitor the value of the displacement gauge (9), complete the simulation of the pipeline space tilt and angular displacement boundary, and limit the pipeline (1); Module M3.1: Adjust the translational and rotational displacements of the sliding fixture (5) and the corner and sealing fixture (6) by means of the displacement loading bolt (7), and monitor the translational displacement values ​​by means of the displacement gauge (9); Module M3.2: The fixed fixture (4), sliding fixture (5) and corner and sealing fixture (6) are fastened with clamping bolts (8) to meet the limit requirements of pipeline displacement boundary simulation; Module M4: Based on the actual pipeline configuration, install the pipeline simulation boundary and pipeline (1) on the modular base fixture (18), adjust the pipeline simulation displacement boundary and carry out tests to verify the pipeline configuration design.

5. The deformation-equivalent pipeline space tilt and angular displacement boundary simulation system according to claim 4, characterized in that, The pipeline simulation boundary includes a fixed fixture (4), a sliding fixture (5), a corner and sealing fixture (6), a displacement loading bolt (7), a clamping bolt (8), and a displacement gauge (9); The fixed fixture (4) is provided with a waist-shaped hole (10) for the fixed fixture, which can guide the translational displacement and realize the translational displacement loading of the pipeline (1); The fixed fixture (4) is also provided with a support hole (11) for installing a displacement loading bolt (7). The sliding fixture (5) is provided with a sliding fixture waist-shaped hole (12) and a cylindrical rotating shaft (13), which respectively guide the translational displacement and the angular displacement, so as to realize the translational displacement and angular displacement loading of the pipeline (1); The corner and sealing fixture (6) is provided with an annular waist-shaped hole (14) and a cylindrical groove (15), which cooperate with the cylindrical rotating shaft (13) on the sliding fixture (5) to guide the corner displacement; The corner and sealing fixture (6) is also provided with a sealing port (16), which cooperates with the end face of the pipeline (1) to achieve the sealing of the pipeline (1); The pipeline (1) is connected to the corner and the sealing fixture (6) by connecting bolts (17).

6. The deformation-equivalent pipeline space tilt and angular displacement boundary simulation system according to claim 4, characterized in that, The rotational displacement is obtained by conversion using trigonometric functions: ； Where α is the rotation angle, and U is the translational displacement applied by the displacement loading bolt. l The length of the fixture is fixed on the side of the loading bolt.

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