Damper-rotor system dynamics analysis method and system based on oil supply groove

Abstract

The invention relates to the technical field of aero-engines and gas turbines, and discloses a damper-rotor system dynamics analysis method and system based on an oil supply groove, and the method comprises the steps: constructing a squeeze film damper circumferential oil film force analysis model based on the oil supply groove; the oil film damping coefficient of the squeeze film damper is obtained through analysis according to the circumferential oil film force and the design rotating speed value of the squeeze film damper of the rotor system. The problem that only damper structure parameter design is considered and the influence of oil supply groove design on damper-rotor system dynamics is not introduced into design when a damper of a conventional rotor system is designed is avoided, the dynamic characteristics of the rotor system are further improved, and the vibration reduction effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engines and gas turbines, and discloses a dynamic analysis method and system for a damper-rotor system based on an oil supply groove. Background Art

[0002] A pivot damper is a commonly used vibration reduction structure in high-performance rotating machinery such as aero-engines. By changing the stiffness and damping parameters at the pivot point, the dynamic characteristics of the rotor system are improved, vibration is reduced, and the transmitted force outside the support is reduced, thereby increasing the bearing life and durability.

[0003] The relevant parameters affecting the vibration reduction effect of a squeeze film damper mainly include damper structure parameters, oil supply groove design, oil supply position, end seal design, and oil supply pressure, etc. In the oil supply groove structure used in a squeeze film damper, the oil supply groove structure supplies oil to the squeeze film damper, and in engineering design, it is necessary to minimize the influence of the oil supply groove on the oil film pressure of the squeeze film damper as much as possible. With the development of engine research and development towards high pressure and high speed, it is found that the influence of the oil supply groove on the oil film pressure of the squeeze film damper is increasing, thus having a great impact on the squeeze film damper-rotor system, and the empirical method can no longer meet the design requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a dynamic analysis method and system for a damper-rotor system based on an oil supply groove, which avoids the problem that only the damper structure parameters are considered in the design of the damper of a conventional rotor system without introducing the influence of the oil supply groove design on the dynamics of the damper-rotor system into the design, further improves the dynamic characteristics of the rotor system, and enhances the vibration reduction effect.

[0005] In order to achieve the above technical effects, the technical solution adopted by the present invention is as follows: A dynamic analysis method for a damper-rotor system based on an oil supply groove, comprising: Carrying out a simulation analysis on a squeeze film damper-rotor system under different rotor speeds and different combined parameters of oil supply viscosity coefficients, obtaining the circumferential oil film force of the squeeze film damper under the corresponding combined parameter conditions, and determining the oil film structure generated during oil supply by the oil supply groove; the oil supply groove is an integral ring groove structure opened on the outer ring of the squeeze film damper, and the oil supply groove is communicated with the oil supply hole; According to the circumferential oil film force of the squeeze film damper, the lubricating oil viscosity, the squeeze film damper structure parameters, and the oil film structure parameters generated during oil supply by the oil supply groove determined by the simulation, constructing an analysis model for the circumferential oil film force of the squeeze film damper based on the oil supply groove; According to the designed rotational speed of the rotor system, the oil supply parameters, and the structural parameters of the squeeze film damper, simulate and determine the oil film structure generated when the oil supply groove supplies oil, and analyze the circumferential oil film force of the rotor system by using the circumferential oil film force analysis model of the squeeze film damper; analyze and obtain the oil film damping coefficient of the squeeze film damper according to the circumferential oil film force of the rotor system and the designed rotational speed value.

[0006] Further, the oil film damping coefficient of the squeeze film damper is obtained by analysis according to where is the circumferential oil film force of the squeeze film damper, is the natural constant, is the rotor speed.

[0007] Further, when the oil film generated when the oil supply groove supplies oil is a double oil film with a double-peak structure protruding towards the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0008] Further, when the oil film generated when the oil supply groove supplies oil is a single-peak oil film structure protruding towards the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0009] Further, when the oil film generated when the oil supply groove supplies oil is a full-width oil film structure that does not protrude towards the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the length of the oil supply groove of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0010] To achieve the above technical effects, the present invention also provides a dynamic analysis system for a damper-rotor system based on an oil supply groove, including: A simulation analysis module that conducts simulation analysis of the squeeze film damper-rotor system under different rotor speeds and different combinations of oil supply viscosity coefficient parameters, obtains the circumferential oil film force of the squeeze film damper under the corresponding combination of parameters, and determines the oil film structure generated when the oil supply groove supplies oil; the oil supply groove is a whole-ring groove structure opened on the outer ring of the squeeze film damper, and the oil supply groove is communicated with the oil supply hole; A model construction module for constructing an analysis model of the circumferential oil film force of the squeeze film damper based on the oil supply groove according to the circumferential oil film force of the squeeze film damper, the lubricating oil viscosity, the structural parameters of the squeeze film damper, and the oil film structure parameters determined by the simulation when the oil supply groove supplies oil; A damping coefficient analysis module for simulating and determining the oil film structure generated when the oil supply groove supplies oil according to the designed speed of the rotor system, the oil supply parameters, and the structural parameters of the squeeze film damper, and analyzing and obtaining the circumferential oil film force of the rotor system by using the analysis model of the circumferential oil film force of the squeeze film damper; analyzing and obtaining the oil film damping coefficient of the squeeze film damper according to the circumferential oil film force of the rotor system and the designed speed value.

[0011] Further, in the second analysis module, the oil film damping coefficient of the squeeze film damper is obtained by analyzing according to where is the circumferential oil film force of the squeeze film damper, is the natural constant, is the rotor speed.

[0012] Further, in the model construction module, when the oil film generated when the oil supply groove supplies oil is a double oil film with a double-peak structure protruding towards the oil supply direction, the analysis model of the circumferential oil film force of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0013] Furthermore, in the model construction module, when the oil film generated during the oil supply of the oil supply groove is a single-peak oil film structure convex in the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper constructed is , where is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0014] Furthermore, in the model construction module, when the oil film generated during the oil supply of the oil supply groove is a full-width oil film structure that does not protrude in the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper constructed is , where is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the length of the oil supply groove of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: By constructing a circumferential oil film force analysis model of the squeeze film damper based on the oil supply groove, when designing the damper of the rotor system, the oil film damping coefficient of the squeeze film damper is analyzed and obtained through the circumferential oil film force of the squeeze film damper of the rotor system and the design speed value. It avoids the problem that only the damper structure parameters are considered in the design of the damper of the conventional rotor system without introducing the influence of the oil supply groove design on the dynamics of the damper-rotor system, further improves the dynamic characteristics of the rotor system, and enhances the vibration reduction effect. Description of the Drawings

[0016] Figure 1 is the flow chart of the dynamic analysis method of the damper-rotor system based on the oil supply groove in Embodiment 1 or 2; Figure 2 is the structural block diagram of the dynamic analysis system of the damper-rotor system based on the oil supply groove in Embodiment 1 or 2; Figure 3 is the schematic diagram of the double oil film structure based on the oil supply groove and generated in Embodiment 2; Figure 4 Schematic diagram of the single oil film structure based on the oil supply groove in Embodiment 2; Among them, 1. oil supply groove; 2. outer ring; 3. oil film gap; 4. double oil film; 5. single-peak oil film; 6. simulation analysis module; 7. model construction module; 8. damping coefficient analysis module. Specific implementation manners

[0017] The present invention will be further described in detail below in conjunction with the embodiments and the drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present invention is limited to the following embodiments. Any technology implemented based on the content of the present invention belongs to the scope of the present invention.

[0018] Embodiment 1 Refer to Figures 1-4 , a dynamic analysis method for a damper-rotor system based on an oil supply groove, including: Carry out simulation analysis on the squeeze film damper-rotor system under different rotor speeds and different combined parameters of oil supply viscosity coefficients, obtain the circumferential oil film force of the squeeze film damper under the corresponding combined parameter conditions, and determine the oil film structure generated when the oil supply groove 1 supplies oil; the oil supply groove 1 is an integral ring groove structure opened on the outer ring 2 of the squeeze film damper, and the oil supply groove 1 is communicated with the oil supply hole; According to the circumferential oil film force of the squeeze film damper, the lubricating oil viscosity, the structural parameters of the squeeze film damper, and the oil film structure parameters determined by the simulation when the oil supply groove 1 supplies oil, construct an analysis model for the circumferential oil film force of the squeeze film damper based on the oil supply groove 1; According to the design speed of the rotor system, the oil supply parameters, and the structural parameters of the squeeze film damper, simulate and determine the oil film structure generated when the oil supply groove 1 supplies oil, and analyze and obtain the circumferential oil film force of the rotor system by using the analysis model of the circumferential oil film force of the squeeze film damper; analyze and obtain the oil film damping coefficient of the squeeze film damper according to the circumferential oil film force of the rotor system and the design speed value.

[0019] In this embodiment, by constructing an analysis model for the circumferential oil film force of the squeeze film damper based on the oil supply groove 1, when designing the damper of the rotor system, the oil film damping coefficient of the squeeze film damper is analyzed and obtained through the circumferential oil film force of the squeeze film damper of the rotor system and the design speed value. It avoids the problem that only the structural parameters of the damper are considered in the design of the damper of the conventional rotor system without introducing the influence of the design of the oil supply groove 1 on the dynamics of the damper-rotor system into the design, further improves the dynamic characteristics of the rotor system, and enhances the vibration reduction effect.

[0020] Based on the same inventive concept, this embodiment also provides a dynamic analysis system for a squeeze film damper-rotor system based on the oil supply groove 1, including: The simulation analysis module 6 conducts simulation analysis on the squeeze film damper-rotor system under different rotor speeds and different combined parameters of oil supply viscosity coefficients, obtains the circumferential oil film force of the squeeze film damper under the corresponding combined parameter conditions, and determines the oil film structure generated when the oil supply groove 1 supplies oil; the oil supply groove 1 is an integral ring groove structure opened on the outer ring 2 of the squeeze film damper, and the oil supply groove 1 is communicated with the oil supply hole; The model construction module 7 is used to construct an analysis model of the circumferential oil film force of the squeeze film damper based on the oil supply groove 1 according to the circumferential oil film force of the squeeze film damper, the lubricating oil viscosity, the structural parameters of the squeeze film damper, and the oil film structure parameters generated when the oil supply groove 1 supplies oil determined by simulation; The damping coefficient analysis module 8 is used to simulate and determine the oil film structure generated when the oil supply groove 1 supplies oil according to the designed rotational speed of the rotor system, the oil supply parameters, and the structural parameters of the squeeze film damper, and analyze and obtain the circumferential oil film force of the rotor system by using the analysis model of the circumferential oil film force of the squeeze film damper; analyze and obtain the oil film damping coefficient of the squeeze film damper according to the circumferential oil film force of the rotor system and the designed rotational speed value.

[0021] Embodiment 2 See Figure 1 、 Figure 3 、 Figure 4 For the dynamic analysis method of the squeeze film damper-rotor system based on the oil supply groove 1, it includes: Step 1: Conduct simulation analysis on the squeeze film damper-rotor system under different rotor speeds and different combined parameters of oil supply viscosity coefficients, obtain the circumferential oil film force of the squeeze film damper under the corresponding combined parameter conditions, and determine the oil film structure generated when the oil supply groove 1 supplies oil; the oil supply groove 1 is an integral ring groove structure opened on the outer ring 2 of the squeeze film damper, and the oil supply groove 1 is communicated with the oil supply hole; In this embodiment, combined with the structural form of the oil supply groove 1, the structure of the oil film has the following types: When the oil supply groove 1 is deeper or wider, the lubricating oil forms high-pressure areas on both sides of the oil supply groove 1, causing the oil film to bulge outwards on both sides in the oil supply direction, generating a double oil film 4 with a double-peak structure bulging towards the oil supply direction; When the depth or width of the oil supply groove 1 is moderate, the lubricating oil accumulates on one side of the oil supply groove 1, generating a single-peak oil film 5 structure bulging towards the oil supply direction; When the depth of the oil supply groove 1 is relatively shallow and the width is relatively narrow (i.e., "not deep nor wide"), the flow of the lubricating oil in the oil supply groove 1 is restricted and a local high-pressure area cannot be formed. At this time, the oil film is evenly distributed in the circumferential direction and will not bulge outwards in the oil supply direction (such as the axial or circumferential direction), thereby forming a full oil film structure covering the entire width of the oil film gap.

[0022] Step 2: Based on the circumferential oil film force of the squeeze film damper, the lubricating oil viscosity, the structural parameters of the squeeze film damper, and the oil film structure parameters generated during the oil supply of the oil supply groove 1 determined by the simulation, construct an analysis model of the circumferential oil film force of the squeeze film damper based on the oil supply groove 1; In this embodiment, for the above three different oil film types, the corresponding oil film force analysis models are also different. Specifically: When the oil film generated during the oil supply of the oil supply groove 1 is a double oil film 4 with a double-peak structure convex towards the oil supply direction, the analysis model of the circumferential oil film force of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance 3 of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0023] When the oil film generated during the oil supply of the oil supply groove 1 is a single-peak oil film 5 structure convex towards the oil supply direction, the analysis model of the circumferential oil film force of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance 3 of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0024] When the oil film generated during the oil supply of the oil supply groove 1 is a full-width oil film structure that does not protrude towards the oil supply direction, the analysis model of the circumferential oil film force of the squeeze film damper constructed is where is the circumferential oil film force of the squeeze film damper, is the oil film clearance 3 of the squeeze film damper, is the lubricating oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the length of the oil supply groove 1 of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

[0025] Step 3: According to the designed rotational speed of the rotor system, the oil supply parameters, and the structural parameters of the squeeze film damper, simulate to determine the oil film structure generated when the oil supply groove 1 supplies oil, and analyze the circumferential oil film force of the rotor system by using the circumferential oil film force analysis model of the squeeze film damper; analyze and obtain the oil film damping coefficient of the squeeze film damper according to the circumferential oil film force of the rotor system and the designed rotational speed value.

[0026] In this embodiment, after determining the oil film structure generated when the oil supply groove 1 of the rotor system supplies oil, the corresponding circumferential oil film force can be calculated according to the circumferential oil film force analysis model of the corresponding squeeze film damper, and finally analyze and obtain the oil film damping coefficient of the squeeze film damper , where is the circumferential oil film force of the squeeze film damper, is the natural constant, is the rotor speed.

[0027] In the design of the rotor system damper in this embodiment, two major technological breakthroughs have been achieved: First, by introducing the coupling analysis of the structural parameters of the oil supply groove 1 and the oil film morphology, a refined mechanical model under three typical working conditions of the double oil film 4, the single-peak oil film 5, and the full-width oil film is established. The geometric characteristics of the oil supply groove 1 (such as the length of the oil supply groove 1 and the length of the oil film, etc.) ignored in the traditional design are incorporated into the damping coefficient calculation system, and the dynamic correction of the damping coefficient is realized by constructing the mapping relationship of rotational speed-viscosity-oil film morphology.

[0028] To verify the vibration reduction effect of the damper designed in this embodiment, in the aero-engine bench test of this embodiment, dynamic contrast tests are carried out on the high-pressure rotor of the engine under two conditions of not filling lubricating oil and filling lubricating oil: Control group: A damper with a conventional equal-width oil supply groove 1 ( ) is used. The measured vibration displacement at the first critical rotational speed (13200 rpm) is reduced from 105 μm in the oil-free state to 34 μm, and the vibration reduction efficiency is 67.6%; Experimental group: Designed by applying the variable-width oil supply groove 1 of the present invention ( ), at the same rotational speed, the amplitude is reduced to 12.5 μm, and the vibration reduction efficiency reaches 88.1%, which is 20.5 percentage points higher than the traditional design; The predicted value based on the double-peak oil film model is 11.8 μm (vibration reduction efficiency 88.8%), and the error from the measured value is only 0.7 μm (5.6%), verifying the engineering applicability of the model; The vibration amplitude at the rotor critical rotational speed is reduced by 41.7% compared with the traditional design, and the oil film rupture threshold rotational speed is increased by 18.3%, verifying the engineering applicability of the model under the working conditions of high rotational speed (>15000 rpm) and high eccentricity (ε>0.6).

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A dynamic analysis method of a damper-rotor system based on an oil supply groove, characterized in that: include: Carry out simulation analysis of the squeeze film damper-rotor system under different rotor speeds and different oil supply viscosity coefficient combination parameter conditions, obtain the circumferential oil film force of the squeeze film damper under the corresponding combination parameter conditions, and determine the oil film structure generated when the oil supply groove supplies oil; the oil supply groove is a full-ring groove structure opened on the outer ring of the squeeze film damper, and the oil supply groove is connected to the oil supply hole; According to the circumferential oil film force of the squeeze film damper, the viscosity of the lubricating oil, the structural parameters of the squeeze film damper, and the structural parameters of the oil film generated when the oil supply groove supplies oil determined by simulation, a circumferential oil film force analysis model of the squeeze film damper based on the oil supply groove is constructed; According to the design speed of the rotor system, the oil supply parameters and the structural parameters of the squeeze film damper, the oil film structure generated when the oil supply groove is supplied with oil is determined by simulation, and the circumferential oil film force analysis model of the squeeze film damper is used to analyze and obtain the circumferential oil film force of the rotor system; The oil film damping coefficient of the squeeze film damper is obtained based on the circumferential oil film force and design speed value of the rotor system.

2. The damper-rotor system dynamics analysis method based on the oil supply groove according to claim 1 is characterized in that: Squeeze film damper oil film damping coefficient according to The analysis obtained is the circumferential oil film force of the squeeze film damper, is a natural constant, is the rotor speed.

3. The damper-rotor system dynamics analysis method based on the oil supply groove according to claim 1 is characterized in that: When the oil film generated by the oil supply groove when supplying oil is a double oil film with a double peak structure protruding in the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper is constructed as follows: ,in is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

4. The damper-rotor system dynamics analysis method based on the oil supply groove according to claim 1 is characterized in that: When the oil film generated by the oil supply groove is a single-peak oil film structure protruding in the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper is constructed as follows: ,in is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

5. The damper-rotor system dynamics analysis method based on the oil supply groove according to claim 1, characterized in that: When the oil film generated by the oil supply groove when supplying oil is a full-width oil film structure that does not protrude in the oil supply direction, the circumferential oil film force analysis model of the squeeze film damper is constructed as follows: ,in is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil supply groove length of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

6. The damper-rotor system dynamics analysis system based on the oil supply groove is characterized by: include: The simulation analysis module carries out simulation analysis of the squeeze film damper-rotor system under different rotor speeds and different oil supply viscosity coefficient combination parameter conditions, obtains the circumferential oil film force of the squeeze film damper under the corresponding combination parameter conditions, and determines the oil film structure generated when the oil supply groove supplies oil; the oil supply groove is a full ring groove structure opened on the outer ring of the squeeze film damper, and the oil supply groove is connected to the oil supply hole; A model building module, for building a circumferential oil film force analysis model of a squeeze film damper based on an oil supply groove according to the circumferential oil film force of the squeeze film damper, the viscosity of the lubricating oil, the structural parameters of the squeeze film damper, and the structural parameters of the oil film generated when the oil supply groove supplies oil determined by simulation; The damping coefficient analysis module is used to simulate and determine the oil film structure generated when the oil supply groove supplies oil according to the design speed of the rotor system, the oil supply parameters and the structural parameters of the squeeze film damper, and obtain the circumferential oil film force of the rotor system by using the circumferential oil film force analysis model of the squeeze film damper; The oil film damping coefficient of the squeeze film damper is obtained based on the circumferential oil film force and design speed value of the rotor system.

7. The damper-rotor system dynamics analysis system based on the oil supply groove according to claim 6, characterized in that: In the damping coefficient analysis module, the oil film damping coefficient of the squeeze film damper according to The analysis obtained is the circumferential oil film force of the squeeze film damper, is a natural constant, is the rotor speed.

8. The damper-rotor system dynamics analysis system based on the oil supply groove according to claim 6, characterized in that: In the model building module, when the oil film generated by the oil supply groove when supplying oil is a double oil film with a double peak structure protruding in the oil supply direction, the constructed circumferential oil film force analysis model of the squeeze film damper is ,in is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

9. The damper-rotor system dynamics analysis system based on the oil supply groove according to claim 6, characterized in that: In the model building module, when the oil film generated by the oil supply groove when supplying oil is a single-peak oil film structure protruding in the oil supply direction, the constructed circumferential oil film force analysis model of the squeeze film damper is ,in is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

10. The damper-rotor system dynamics analysis system based on the oil supply groove according to claim 6, characterized in that: In the model building module, when the oil film generated by the oil supply groove when supplying oil is a full-width oil film structure that does not protrude in the oil supply direction, the constructed circumferential oil film force analysis model of the squeeze film damper is ,in is the circumferential oil film force of the squeeze film damper, is the oil film clearance of the squeeze film damper, is the oil viscosity, is the rotor speed, is the radius of the squeeze film damper, is the oil supply groove length of the squeeze film damper, is the oil film length of the squeeze film damper, is the eccentricity of the oil film journal of the squeeze film damper.

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