A large-scale polymer injection pump high-loss damping base structure optimization method and system

Abstract

The application discloses a large-scale polymer injection pump high-loss vibration reduction base structure optimization method and system, and relates to the technical field of ocean engineering.The method comprises the following steps: calculating vertical direction excitation load and horizontal direction excitation load of the polymer injection pump; preliminarily designing and optimizing a support prop structure; performing static force and dynamic force analysis on the optimized support prop structure based on the vertical direction excitation load, the horizontal direction excitation load and the overall stiffness matrix of the support prop structure to determine the design of the vibration reduction base; establishing an overall vibration response analysis model of the polymer injection pump-support prop-vibration reduction base-polymer injection platform, and solving the model by using the Newmark-beta method to determine the influence law of different structure parameters on the vibration response of the polymer injection platform; and based on the response law, determining the optimal structure parameters by using a particle swarm optimization algorithm to optimize the design of the vibration reduction base.The application can improve the efficiency of the optimization design of the high-loss vibration reduction base, and has strong use value.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to a method and system for optimizing the high-loss vibration reduction base structure of a large polymer injection pump. Background Technology

[0002] After years of development, some oil and gas fields in shallow sea areas have seen declining oil and gas production from wells, leading to a significant increase in development costs. To improve the oil well yield, a common engineering method is to inject a certain concentration of polymer into the well using a large polymer injection pump. However, due to the high viscosity of polymers, the required pump power is high, and the pump operates at a low frequency, resulting in large-amplitude, low-frequency vibrations. Prolonged operation of such pumps can cause fatigue damage to the pump platform structure and reduce the bearing capacity of the pile foundation, significantly impacting the safety of the pump platform. Therefore, it is necessary to design a dedicated vibration-isolation base for the large polymer injection pump structure.

[0003] To mitigate the impact of polymer injection pump vibration on the polymer injection platform structure, vibration isolation design is generally employed. Vibration isolation design, based on linear vibration reduction theory, uses appropriately placed springs or rubber pads to prevent the vibration response of the polymer injection pump structure from being effectively transmitted to the underlying structure. These structures are often linear or weakly linear vibration isolation bases. While these bases offer good isolation for high-frequency vibrations, for low-frequency vibrations, a significant reduction in the stiffness of the isolation device is needed to achieve adequate isolation, leading to insufficient structural load-bearing capacity. Recently, vibration isolation devices based on nonlinear vibration isolation theory have emerged, such as multi-stable state isolation devices, negative stiffness isolation devices, and electromagnetic isolation devices. These devices have complex structures and can only effectively isolate vibrations at specific frequencies, exhibiting problems such as low structural stiffness and insufficient load-bearing capacity, making them significantly inadequate for vibration reduction in polymer injection pumps.

[0004] Vibration-absorbing design involves using energy-absorbing or energy-dissipating materials such as damping plates and dampers to absorb or dissipate the vibration energy of the polymer injection pump, thereby reducing the vibration of the polymer injection platform. Commonly used dampers are mostly velocity-dependent dampers, meaning that a significant energy absorption effect is only achieved when the power equipment generates a relatively large vibration velocity (corresponding to a large structural deformation). Because the polymer injection pump structure has very high rigidity and very limited installation space, the vibration velocity generated during operation is not particularly significant. Therefore, using traditional dampers for vibration absorption or energy dissipation is not very effective.

[0005] Whether it is vibration isolation design or vibration absorption design, the preliminary design process relies on experience. Then, a complex finite element model of polymer injection pump-vibration isolation device-polymer injection platform is established to verify the effectiveness of the designed vibration isolation device. Further optimization of the vibration isolation device is carried out by improving parameters. This process has problems such as complex modeling, low computational efficiency, many repetitions, and failure to reach the optimal solution. Summary of the Invention

[0006] The purpose of this invention is to provide a method and system for optimizing the structure of a high-loss vibration-damping base for a large polymer injection pump. This method directly obtains the influence of relevant parameters of the high-loss vibration-damping base on the vibration response of the polymer injection platform. The optimal vibration-damping base parameters are obtained directly through optimization algorithms, avoiding complex modeling analysis and iterative design processes.

[0007] To achieve the above objectives, the present invention provides, in one aspect, the following:

[0008] A method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump includes:

[0009] Calculate the reciprocating vibration load and centrifugal vibration load of the polymer injection pump based on its internal structural parameters.

[0010] The reciprocating vibration load and the centrifugal vibration load of the polymer injection pump are decomposed into vertical vibration load and horizontal vibration load.

[0011] The support skid structure is preliminarily designed according to the main dimensions and specifications of the polymer injection pump, and the natural frequency of the support skid structure is calculated.

[0012] Based on the natural frequency of the support skid structure, the preliminary design of the support skid structure is optimized according to the principle of passive vibration isolation;

[0013] Based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, static and dynamic analyses are performed on the optimized support skid structure to determine the design of the vibration damping base; the design of the vibration damping base includes the spring stiffness design and energy dissipation damping design of the vibration damping base.

[0014] An overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform was established, and the Newmark-β method was used to solve the overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform to determine the influence of different structural parameters on the vibration response of the polymer injection platform.

[0015] Based on the aforementioned response characteristics, the optimal structural parameters are determined using a particle swarm optimization algorithm to optimize the design of the vibration damping base.

[0016] Another aspect of the present invention provides:

[0017] A high-loss vibration-damping base structure optimization system for a large polymer injection pump includes:

[0018] The module for calculating the reciprocating and centrifugal vibration loads of the polymer injection pump is used to calculate the reciprocating and centrifugal vibration loads of the polymer injection pump based on the internal structural parameters of the polymer injection pump.

[0019] The decomposition module is used to decompose the reciprocating vibration load and the centrifugal vibration load of the injection pump into vertical vibration load and horizontal vibration load.

[0020] The preliminary design module for the support skid structure is used to perform a preliminary design of the support skid structure based on the main dimensions and specifications of the polymer injection pump, and to calculate the natural frequency of the support skid structure.

[0021] The preliminary design optimization module for the support skid structure is used to optimize the preliminary design of the support skid structure based on its natural frequency and the principle of passive vibration isolation.

[0022] The vibration damping base design module is used to perform static and dynamic analysis on the optimized support skid structure based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, and to determine the design of the vibration damping base; the design of the vibration damping base includes the spring stiffness design and energy dissipation damping design of the vibration damping base.

[0023] The solution module is used to establish an overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform, and to use the Newmark-β method to solve the overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform to determine the influence of different structural parameters on the vibration response of the polymer injection platform.

[0024] The vibration damping base design optimization module is used to determine the optimal structural parameters based on the response law and the particle swarm optimization algorithm to optimize the design of the vibration damping base.

[0025] According to specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0026] The method and system for optimizing the structure of a high-loss vibration-damping base for a large polymer injection pump provided by this invention constructs an overall vibration analysis model based on the preliminary design. Without establishing detailed numerical models of the polymer injection pump, vibration damping and isolation device, and jacket platform, it directly obtains the influence law of relevant parameters of the vibration-damping base on the vibration response of the platform deck. The optimal design parameters of the vibration-damping base are directly determined by the optimization algorithm, which greatly improves the efficiency of the optimization design of the high-loss vibration-damping base and has strong application value. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a flowchart of the method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump according to Embodiment 1 of the present invention;

[0029] Figure 2 This is a logic block diagram of the high-loss vibration-damping base structure optimization method for large polymer injection pumps provided in Embodiment 1 of the present invention;

[0030] Figure 3 This is a schematic diagram of the motion of the crank-slider multibody structure of a polymer injection pump.

[0031] Figure 4 This invention relates to a high-damage vibration-damping base designed based on the present invention.

[0032] Figure 5 This is a schematic diagram of a frame-type damping skid structure;

[0033] Figure 6 This is a schematic diagram of a spring-damped vibration reduction device.

[0034] Figure 7 This is a schematic diagram of the polymer injection platform structure. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figures 1-2 As shown in this embodiment, the method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump includes the following steps:

[0039] Step 10: Calculate the reciprocating vibration load and centrifugal vibration load of the polymer injection pump based on the internal structural parameters of the polymer injection pump.

[0040] Step 20: Decompose the reciprocating vibration load and centrifugal vibration load of the polymer injection pump into vertical vibration load and horizontal vibration load.

[0041] Step 30: Perform a preliminary design of the support skid structure based on the main dimensions and specifications of the polymer injection pump, and calculate the natural frequency of the support skid structure.

[0042] Step 40: Based on the natural frequency of the support skid structure, optimize the preliminary design of the support skid structure according to the principle of passive vibration isolation.

[0043] Step 50: Based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, perform static and dynamic analysis on the optimized support skid structure to determine the design of the vibration damping base; the design of the vibration damping base includes the spring stiffness design and energy dissipation damping design of the vibration damping base.

[0044] Step 60: Establish an overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform, and solve the overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform using the Newmark-β method. Optimize the design of the vibration damping base based on the solution results.

[0045] Furthermore, steps 10 and 20 specifically include:

[0046] The internal structure of the polymer injection pump was analyzed to obtain the rotational speed ω, radius r, and mass m of the pump crankshaft. c The length L of the connecting rod and its own mass m r1 and the equivalent mass m at the constraint point r2 The mass m of the piston p Based on the relationships between the crankshaft, connecting rod, piston pump, and other structural components, such as... Figure 3 As shown, the first and second order reciprocating excitation loads F of the polymer injection pump are calculated. s =rω 2 (m p +m r2 cosωt+rω 2 λ(m p +m r2 cos2ωt and centrifugal vibration load F of the polymer injection pump c =(m c +m r1 )rω 2 λ is the ratio of the crankshaft radius r of the polymer injection pump to the connecting rod length L. Based on the structure of the polymer injection pump, the reciprocating and centrifugal excitation loads of the pump are decomposed into a horizontal excitation load F. y =F s -F c cos(ωt) and vertical excitation load F z =F c sin(ωt).

[0047] Furthermore, steps 30-40 specifically include:

[0048] Step 301: Based on the main dimensions of the polymer injection pump and the requirements for installation and fixation, slightly increase the main dimensions of the polymer injection pump as the initial dimensions of the support skid structure. Install several transversely and longitudinally arranged I-beams inside the support skid according to the span requirements specified in the specifications. Step 302: Construct the overall mass matrix M of the support skid structure based on the parameters of the I-beams. S and the overall stiffness matrix K S According to -ω S 2 M S +K S =0, the natural frequency ω of the supporting skid structure is calculated. S Then, combining the excitation frequency ω of the polymer injection pump, the vibration response amplification factor γ is calculated. ξ s =C S / (2M S ω S ),in The load frequency ω of the polymer injection pump and the natural frequency ω of the support skid structure are... S The ratio of ξ s To support the damping ratio of the skid structure, the vibration response amplification factor is used to determine whether resonance will occur between the polymer injection pump and the skid structure (i.e., whether the structure resonates based on whether the amplification factor γ is greater than 1.0). Then, by changing the cross-sectional properties of the I-beam to increase or decrease the stiffness of the skid structure, the resonance between the polymer injection pump and the skid structure can be avoided, thus optimizing the preliminary design of the skid structure.

[0049] Furthermore, specific step 50 includes:

[0050] Based on the vibration load amplitude vector F of the polymer injection pump a and the stiffness matrix K of the supporting skid structure S Using K S {x0}=F a The deformation x0 at different nodes of the support skid can be obtained to determine the layout scheme (placement location and quantity) of the spring damping vibration reduction device. The spring stiffness of the spring damping vibration reduction device is determined based on the weight of the polymer injection pump and the support skid, the available installation space, and the allowable spring deformation. A vibration analysis model of the polymer injection pump-support skid structure is established. The vibration velocity vector at the non-rigidly constrained nodes of the support skid structure was obtained using the Newmark-β method. The optimal viscous damper parameters are selected based on the vibration velocity amplitude.

[0051] Furthermore, steps 60-70 specifically include:

[0052] Based on the relevant parameters of the polymer injection pump, support skid structure, spring damping vibration reduction device, and platform deck structure, an overall vibration response analysis model of the polymer injection pump, support skid, vibration reduction base, and polymer injection platform is established. The Newmark-β method was used to solve the dynamic response of the overall vibration analysis model, obtaining the vibration response velocities at different nodes and clarifying the influence of different structural parameters on the vibration response of the injection platform. With minimizing the platform vibration response as the optimization objective and the spring length and compression as constraints, a particle swarm optimization algorithm was used to optimize the cross-sectional properties of the I-beam of the support skid structure, the stiffness and damping parameters of the spring damping device, and to determine the high-loss vibration damping base with optimal vibration reduction performance. The designed high-loss vibration damping base is shown below. Figure 5 As shown. Figure 5 In the diagram, 21 is the internal I-beam of the frame-type damping skid structure, and 22 is the external I-beam of the frame-type damping skid structure.

[0053] To construct the overall mass matrix and element matrix of the supporting skid and deck structure I-beam, the element mass matrix M is first calculated using the following formula. e and stiffness matrix K e :

[0054]

[0055] The element stiffness matrix K of the supporting skid and deck structure I-beam e The determination method is as follows:

[0056]

[0057] Where ρ is the density of the beam, A is the cross-sectional area of ​​the beam element, l is the length of the beam element, and r is the density of the beam element. b Let I be the radius of gyration of the beam element section, and I = ∫ A y 2 dA is the moment of inertia of the cross section.

[0058] Construct the coordinate transformation matrix T based on the arrangement of the beam elements in the global coordinate system, and obtain the mass matrix M of the I-beam in the global coordinate system according to the following formula. g =TM e T′ and stiffness matrix K g =TK e T′. Based on the node position relationships, the element mass matrix and stiffness matrix in the global coordinate system are combined to form the overall mass matrix and stiffness matrix of the support skid structure and deck structure.

[0059] To establish an overall vibration analysis model of the polymer injection pump-support skid-spring damping vibration reduction device-platform deck structure, the mass matrix of the overall vibration analysis model is first calculated according to the following formula:

[0060]

[0061] In the formula, M S M C M D These are the overall mass matrices for the support skid structure, the spring damping vibration reduction device, and the platform deck structure, respectively. The dimensions of each matrix are determined according to the specific structure.

[0062] Next, the stiffness matrix of the overall vibration analysis model is calculated according to the following formula:

[0063]

[0064] In the formula, K S K C K D These are the overall stiffness matrices for the support skid structure, the spring damping vibration reduction device, and the platform deck structure, respectively. The dimensions of each matrix are the same as its mass matrix.

[0065] Next, based on the Rayleigh damping model, the structural damping matrix of the overall vibration analysis model is determined:

[0066] C=αM+βK

[0067] In the formula, ω i Let ξ be the natural frequency of the overall model, and ξ be the damping ratio of the overall model. Further, a viscous damping matrix C is constructed based on the damping parameters of the spring-damped vibration reduction device. v .

[0068] Using the aforementioned mass matrix, damping matrix, stiffness matrix, and vibration load of the polymer injection pump, a comprehensive vibration analysis model of the polymer injection pump-support skid-spring damping vibration reduction device-platform deck structure can be constructed:

[0069]

[0070] The dynamic response of the overall vibration analysis model is solved using the Newmark-β method, and the vibration response velocity at different nodes can be obtained. The platform vibration intensity is constructed using the response velocity, and the vibration response level of the platform deck is evaluated.

[0071] To more clearly illustrate the technical effects of the present invention, the 3ZJ-50 / 15 type three-cylinder polymer injection pump is used as an example to design its vibration damping base and verify the vibration isolation effect of the vibration damping base.

[0072] Based on the internal structure of the polymer injection pump, the key structural component parameters of the polymer injection pump can be obtained, as shown in Table 1.

[0073] Table 1 Key Component Parameters of Polymer Injection Pump

[0074]

[0075] Based on the formula in step 10, the reciprocating and centrifugal excitation forces of the polymer injection pump can be obtained:

[0076] F s =ω 2 (m p +m r2 cosωt+rω 2 λ(m p +m r2 cos2ωt

[0077] =1648.1cos(18.326t)+274.7cos(36.652t)N

[0078] F c =(m c +m r1 )rω 2 =17176N

[0079] Based on the structure of the polymer injection pump, the reciprocating and centrifugal excitation loads of the polymer injection pump can be decomposed into horizontal excitation loads and vertical excitation loads:

[0080] F y =F s -F c cos(ωt)=1922.8cos(18.326t)-17176cos(18.326t)

[0081] F z =F c sin(ωt) = 17176sin(18.326t)

[0082] The injection pump is 3.9m long and 2.9m wide. Considering installation and fixing requirements, the total length of the support skid structure is 4.1m and the width is 3.1m. According to specifications, five longitudinally arranged and five transversely arranged I-beams are installed in the middle. Figure 5 As shown. The overall mass matrix M of the supporting skid structure was obtained through programming calculations. S and stiffness matrix K S Modal analysis yielded the first three natural frequencies of the support skid structure, which are 38.82Hz, 41.70Hz, and 56.07Hz, respectively. The ratio of these frequencies to the injection excitation frequency is 113.19, and the dynamic amplification factor is much less than 1.0, indicating a very good vibration reduction and isolation effect.

[0083] The static and dynamic analysis results of the support skid structure show that the deformation in the middle area of ​​the support skid is more significant. Therefore, based on its deformation characteristics, nine spring-damped vibration reduction devices were installed, such as... Figure 4 As shown. Figure 4In this structure, 1 represents a large polymer injection pump, 2 represents a frame-type damping skid structure, 3 represents a spring-damped vibration reduction device, and 4 represents a platform deck structure. The total mass of the polymer injection pump and supporting skid structure is approximately 16 tons, while the allowable deformation of the vibration reduction base in actual engineering is approximately 4 mm. Based on this, the required overall spring stiffness can be calculated to be approximately... The stiffness of this spring is shared by 26 springs connected in parallel, so the stiffness of each spring is approximately 1088.9 kN / m. Further, based on the vibration velocity of the supporting skid structure, the damping ratio of the spring-damped vibration reduction device is determined to be 0.1 (which can be converted to a damping value based on the structure's natural frequency). The resulting spring-damped vibration reduction structure is as follows: Figure 6 As shown. Figure 6 In the diagram, 31 is the upper limit plate of the spring damping vibration reduction device, 32 is the lower limit plate of the spring damping vibration reduction device, 33 is the spring structure of the spring damping vibration reduction device, and 34 is the damper of the spring damping vibration reduction device.

[0084] Will as Figure 7 The information of the polymer injection platform deck shown is extracted, and an overall analysis model of the polymer injection pump-support skid-spring damping vibration reduction device-platform deck structure is established (due to the large dimensions of the structural mass matrix, damping matrix, and stiffness matrix, they are not shown here). Based on the overall analysis model, the vibration response of the platform deck under different parameters can be obtained. The support skid structure and spring damping vibration reduction mechanism are then optimized using the method in step 60 to obtain the optimal high-loss vibration reduction base for the large polymer injection pump, such as... Figure 4 As shown.

[0085] Numerical results show that when 11 polymer injection pumps are running simultaneously, and without considering the vibration damping base, the maximum vibration intensity at a certain point on the polymer injection platform deck is 129.16 mm / s. After adding the vibration damping base designed in this invention, the maximum vibration intensity at a certain point on the polymer injection platform deck is reduced to 73.47 mm / s. The vibration isolation rate in the X direction is approximately 39.21%, the vibration isolation rate in the Y direction is approximately 23.43%, and the vibration isolation rate in the Z direction is approximately 87.42%. The overall vibration isolation rate of the vibration damping base is approximately 43.09%, demonstrating a good vibration reduction effect.

[0086] Example 2

[0087] To implement the method corresponding to Embodiment 1 above and achieve the corresponding functions and technical effects, a high-loss vibration-damping base structure optimization system for large polymer injection pumps is provided below, characterized by comprising:

[0088] The module for calculating the reciprocating and centrifugal vibration loads of the polymer injection pump is used to calculate the reciprocating and centrifugal vibration loads of the polymer injection pump based on the internal structural parameters of the pump.

[0089] The decomposition module is used to decompose the reciprocating vibration load and centrifugal vibration load of the injection pump into vertical vibration load and horizontal vibration load.

[0090] The preliminary design module for the support skid structure is used to perform preliminary design of the support skid structure based on the main dimensions and specifications of the polymer injection pump, and to calculate the natural frequency of the support skid structure.

[0091] The preliminary design optimization module for the support skid structure is used to optimize the preliminary design of the support skid structure based on its natural frequency and the principle of passive vibration isolation.

[0092] The vibration damping base design module is used to perform static and dynamic analysis on the optimized support skid structure based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, and to determine the design of the vibration damping base. The design of the vibration damping base includes the spring stiffness design and the energy dissipation damping design of the vibration damping base.

[0093] The solution module is used to establish an overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform, and to use the Newmark-β method to solve the overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform to determine the influence of different structural parameters on the vibration response of the polymer injection platform.

[0094] The vibration damping base design optimization module is used to determine the optimal structural parameters based on the response law and the particle swarm optimization algorithm, thereby optimizing the design of the vibration damping base.

[0095] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple; relevant parts can be referred to the method section.

[0096] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump, characterized in that, include: Calculate the reciprocating vibration load of the polymer injection pump based on its internal structural parameters. Centrifugal vibration load of injection pump ;in, For the rotational speed of the polymer injection pump crankshaft, The radius of the polymer injection pump crankshaft, For the mass of the polymer injection pump crankshaft, For the mass of the connecting rod itself, Let be the equivalent mass of the link at the constraint point. The mass of the piston; For the crankshaft radius of the polymer injection pump With the length of the connecting rod The ratio; The reciprocating vibration load and the centrifugal vibration load of the polymer injection pump are decomposed into vertical vibration loads. and horizontal excitation load ; The support skid structure is preliminarily designed according to the main dimensions and specifications of the polymer injection pump, and the natural frequency of the support skid structure is calculated. Based on the natural frequency of the support skid structure, the preliminary design of the support skid structure is optimized according to the principle of passive vibration isolation; Based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, static and dynamic analyses are performed on the optimized support skid structure to determine the design of the vibration damping base; the design of the vibration damping base includes the spring stiffness design and energy dissipation damping design of the vibration damping base. A comprehensive vibration response analysis model of the polymer injection pump, support skid, vibration damping base, and polymer injection platform was established, and Newmark- The method is used to solve for the influence of different structural parameters on the vibration response of the polymer injection platform; Based on the aforementioned influence patterns, the optimal structural parameters are determined using a particle swarm optimization algorithm to optimize the design of the vibration-damping base. The calculation formulas for the reciprocating vibration load and the centrifugal vibration load of the polymer injection pump are as follows: in, For the reciprocating vibration load of the polymer injection pump, For the centrifugal vibration load of the polymer injection pump, The radius of the polymer injection pump crankshaft. The crankshaft speed of the polymer injection pump, For the mass of the polymer injection pump piston, The equivalent mass of the polymer injection pump connecting rod, The equivalent mass at the constraint point of the polymer injection pump, The time variable of the excitation load, For the crankshaft radius of the polymer injection pump The ratio of the length of the connecting rod to the length L. For crankshaft mass; The expression for the overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform is as follows: in, The overall mass matrix of the polymer injection pump, support skid, vibration damping base, and polymer injection platform. The overall structural damping matrix for the polymer injection pump-support skid-vibration damping base-polymer injection platform is as follows: The viscous damping matrix is ​​for the polymer injection pump-support skid-vibration damping base-polymer injection platform. The overall stiffness matrix of the polymer injection pump-support skid-vibration damping base-polymer injection platform is as follows: Let V be the vibration acceleration vector at the non-rigidly constrained nodes in the overall structure consisting of the polymer injection pump, support skid, vibration damping base, and polymer injection platform. The vibration velocity vector at the non-rigidly constrained nodes in the overall structure consisting of the polymer injection pump, support skid, vibration damping base, and polymer injection platform; Let V be the vibration amplitude vector at the non-rigidly constrained nodes in the overall structure consisting of the polymer injection pump, support skid, vibration damping base, and polymer injection platform. It is a vector composed of the vertical excitation load and the horizontal excitation load. The time variable represents the excitation load.

2. The method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump according to claim 1, characterized in that, A preliminary design of the support skid structure is performed based on the main dimensions and specifications of the polymer injection pump, and the natural frequency of the support skid structure is calculated, specifically including: Based on the main dimensions of the injection pump and the requirements for installation and fixation, the initial dimensions of the support skid structure are determined. According to the span required by the specifications, several I-beams are set inside the support skid structure in a transverse and longitudinal arrangement to complete the preliminary design of the support skid structure. Calculate the overall mass matrix and overall stiffness matrix of the supporting skid structure based on the parameters of the I-beam; The natural frequency of the support skid structure is calculated based on the mass matrix and the stiffness matrix.

3. The method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump according to claim 1, characterized in that, Based on the natural frequency of the support skid structure, the preliminary design of the support skid structure is optimized according to the principle of passive vibration isolation, specifically including: The vibration response amplification factor is calculated based on the natural frequency of the support skid structure. Based on the vibration response amplification factor, it is determined whether resonance will occur between the polymer injection pump and the support skid structure; Based on the judgment results, the preliminary design of the support skid structure was optimized according to the principle of passive vibration isolation.

4. The method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump according to claim 1, characterized in that, Based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, static and dynamic analyses are performed on the optimized support skid structure to determine the design of the vibration reduction base. The design of the vibration damping base includes the spring stiffness design and energy dissipation damping design of the vibration damping base, specifically including: Based on the amplitude of the vertical excitation load, the amplitude of the horizontal excitation load, and the overall stiffness matrix of the support skid structure, the deformation at different nodes of the support skid structure is calculated, and the arrangement scheme of the spring damping vibration reduction device is determined. The spring stiffness of the spring damping vibration reduction device is determined based on the weight of the injection pump, the weight of the support skid structure, the available installation space, and the allowable spring deformation. Establish a vibration analysis model for the polymer injection pump-support skid structure; Take advantage of Newmark- The method solves the vibration analysis model of the polymer injection pump-support skid structure to obtain the vibration velocity at the installation position of the spring damping vibration reduction device; Select the optimal viscous damper parameters based on the amplitude of the vibration velocity; The expression for the vibration analysis model of the polymer injection pump-support skid structure is as follows: in, The mass matrix supporting the skid structure, The damping matrix is ​​used to support the skid structure. To support the stiffness matrix of the skid structure, To support the vibration acceleration vector at the non-rigid constraint nodes of the skid structure, To support the vibration velocity vector at the non-rigidly constrained nodes of the skid structure, To support the vibration amplitude vector at the non-rigid constraint nodes of the skid structure, Let t be the vector composed of the vertical and horizontal excitation loads of the polymer injection pump, and t be the time variable of the excitation load.

5. The method for optimizing the high-loss vibration-damping base structure of a large polymer injection pump according to claim 1, characterized in that, The formula for calculating the overall mass matrix of the polymer injection pump-support skid-vibration damping base-polymer injection platform is as follows: in, , , These are the overall mass matrices of the support skid structure, the spring damping vibration reduction device, and the platform deck structure, respectively. The formula for calculating the overall stiffness matrix of the polymer injection pump-support skid-vibration damping base-polymer injection platform is as follows: in, , , These are the overall stiffness matrices of the support skid structure, the spring damping vibration reduction device, and the platform deck structure, respectively.

6. A structural optimization system for a high-loss vibration-damping base of a large polymer injection pump, characterized in that, The above system is used to execute the optimization method for the high-loss vibration-damping base structure of a large polymer injection pump according to any one of claims 1-5, the system comprising: The module for calculating the reciprocating and centrifugal vibration loads of the polymer injection pump is used to calculate the reciprocating vibration loads of the polymer injection pump based on its internal structural parameters. Centrifugal vibration load of injection pump ;in, For the rotational speed of the polymer injection pump crankshaft, The radius of the polymer injection pump crankshaft, For the mass of the polymer injection pump crankshaft, For the mass of the connecting rod itself, Let be the equivalent mass of the link at the constraint point. The mass of the piston; For the crankshaft radius of the polymer injection pump With the length of the connecting rod The ratio; The decomposition module is used to decompose the reciprocating vibration load and the centrifugal vibration load of the polymer injection pump into vertical vibration loads. and horizontal excitation load ; The preliminary design module for the support skid structure is used to perform a preliminary design of the support skid structure based on the main dimensions and specifications of the polymer injection pump, and to calculate the natural frequency of the support skid structure. The preliminary design optimization module for the support skid structure is used to optimize the preliminary design of the support skid structure based on its natural frequency and the principle of passive vibration isolation. The vibration damping base design module is used to perform static and dynamic analysis on the optimized support skid structure based on the vertical excitation load, the horizontal excitation load, and the overall stiffness matrix of the support skid structure, and to determine the design of the vibration damping base; the design of the vibration damping base includes the spring stiffness design and energy dissipation damping design of the vibration damping base. The solver module is used to establish an overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform, and utilizes Newmark- The method solves the overall vibration response analysis model of the polymer injection pump-support skid-vibration damping base-polymer injection platform to determine the influence of different structural parameters on the vibration response of the polymer injection platform; The vibration damping base design optimization module is used to determine the optimal structural parameters based on the aforementioned influence laws and to optimize the design of the vibration damping base using a particle swarm optimization algorithm.

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