CN-121997584-A - Main control type elastic support dry friction damper parameter selection method and related device

CN121997584ACN 121997584 ACN121997584 ACN 121997584ACN-121997584-A

Abstract

The invention discloses a parameter selection method and a related device of a main control type elastic support dry friction damper, wherein the method comprises the steps of establishing a one-dimensional simplified analysis model of the main control type elastic support dry friction damper, analyzing the influence rule of positive pressure N on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of friction coefficient mu on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of friction force mu x N on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of excitation frequency f on the amplitude of the damper based on the one-dimensional simplified analysis model, and determining the parameter selection criterion of the main control type elastic support dry friction damper by combining the critical rotating speed requirement of a rotor system.

Inventors

Hao Keshuang
LI XIONG
KANG WEI
HE GUOAN
YOU BICHAO
LIU DIANTAO
ZHOU YAOCHONG
ZHENG XIANGHUA
KONG LINGHUI
LI JIN

Assignees

华能云南滇东能源有限责任公司
西安热工研究院有限公司

Dates

Publication Date: 20260508
Application Date: 20260121

Claims (10)

1. A parameter selection method of a master control type elastic support dry friction damper is characterized by comprising the following steps: establishing a one-dimensional simplified analysis model of the main control type elastic support dry friction damper; Analyzing the influence rule of positive pressure N on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of friction coefficient mu on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of friction force mu x N on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of excitation frequency f on the amplitude of the damper based on the one-dimensional simplified analysis model; and determining parameter selection criteria of the main control type elastic support dry friction damper by combining the critical rotating speed requirement of the rotor system.
2. The method for selecting parameters of a master-control type elastic support dry friction damper according to claim 1, wherein the one-dimensional simplified analysis model of the master-control type elastic support dry friction damper is a one-dimensional two-degree-of-freedom spring mass point model.
3. The method for selecting parameters of a master-control type elastic support dry friction damper according to claim 1, wherein the one-dimensional simplified analysis model of the master-control type elastic support dry friction damper comprises a dynamic mass block, equivalent mass points of a static friction plate, equivalent stiffness and damping of an elastic support.
4. The method for selecting parameters of a master-control type elastic support dry friction damper according to claim 1, wherein a motion differential equation of a one-dimensional simplified analytical model of the master-control type elastic support dry friction damper is: Wherein x 1 is the displacement of m 1 , x 2 is the displacement of m 2 , sgn () is a sign function, k 1 is the bending rigidity of the elastic support of the squirrel cage, k 2 is the shearing contact rigidity of the contact interface of the dynamic friction plate and the static friction plate, c 1 is the structural damping coefficient of the elastic support of the squirrel cage, c 2 is the structural damping coefficient of the contact interface, F c is the coulomb friction between dynamic and static friction pairs, μ is the friction coefficient, N is the positive pressure exerted by the balancing weight, F x is the simple harmonic excitation force acting on m 1 , fx=f 0 cos (Ωt),F 0 is the excitation force amplitude, Ω=2pi F is the excitation angular frequency, and F is the excitation frequency.
5. The method for selecting parameters of a master-control elastic support dry friction damper according to claim 4, wherein in the process of analyzing the law of the influence of friction on the amplitude of the damper, excitation parameters μ×n=3n, 4.5N and 9N are set, different N and μ are taken, F 0 =5n and f=130-140 Hz, and the spring amplitude sweep curves in three cases are calculated.
6. The method for selecting parameters of a master-control elastic support dry friction damper according to claim 4, wherein in the process of analyzing the rule of influence of the excitation frequency F on the damper amplitude, the friction force increases progressively, F 0 = 5N, and F = 130-140Hz, and the sweep frequency amplitude is calculated when the friction force is greater than the excitation force amplitude 5N and equal to the excitation force amplitude 5N and the small Yu Jizhen force amplitude 5N, respectively.
7. The method for selecting parameters of a master-control type elastic support dry friction damper according to claim 4, wherein the specific operation of determining the parameter selection criteria of the master-control type elastic support dry friction damper is to draw a three-dimensional line graph according to the relation among the amplitude, the excitation frequency and the friction force.
8. A master control spring-loaded dry friction damper parameter selection system, comprising: The building module is used for building a one-dimensional simplified analysis model of the main control type elastic support dry friction damper; The device comprises a one-dimensional simplified analysis model, a first analysis module, a second analysis module, a third analysis module, a fourth analysis module, a third analysis module and a fourth analysis module, wherein the one-dimensional simplified analysis model is used for analyzing the influence law of positive pressure N on the amplitude of a damper; And the determining module is used for determining parameter selection criteria of the main control type elastic support dry friction damper in combination with the critical rotation speed requirement of the rotor system.
9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the master controlled resilient support dry friction damper parameter selection method according to any one of claims 1-7 when the computer program is executed by the processor.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the master-control elastic support dry friction damper parameter selection method according to any one of claims 1-7.

Description

Main control type elastic support dry friction damper parameter selection method and related device Technical Field The invention belongs to the technical field of vibration reduction of an aeroengine rotor system, and relates to a parameter selection method and a related device of a main control type elastic support dry friction damper. Background In order to pursue high thrust-weight ratio, modern high-performance aeroengines generally adopt flexible designs, and the working rotating speed is far higher than the first-order critical rotating speed. The rotor needs to pass through the critical rotation speed area for many times in the start-stop process, resonance is easy to generate, large vibration is generated, the stress of the parts is increased, the service life is shortened, and even the system instability is caused. The main control type elastic support dry friction damper is a core device for inhibiting rotor resonance by virtue of the advantages of 'real-time adjustment of contact pressure of friction pair and dynamic change of equivalent damping of a system', and the rationality of parameters of the main control type elastic support dry friction damper directly determines the vibration reduction effect. The existing parameter selection scheme is too dependent on empirical design, does not establish quantitative relation, and has little consideration of parameter coupling synergistic effect, so that a main control type elastic support dry friction damper parameter selection scheme based on a theoretical model and compatible with parameter coupling and working condition adaptation is needed to solve the technical pain point. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a parameter selection method and a related device of a main control type elastic support dry friction damper. In order to achieve the above purpose, the invention discloses a parameter selection method of a main control type elastic support dry friction damper, which comprises the following steps: establishing a one-dimensional simplified analysis model of the main control type elastic support dry friction damper; Analyzing the influence rule of positive pressure N on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of friction coefficient mu on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of friction force mu x N on the amplitude of the damper based on the one-dimensional simplified analysis model, analyzing the influence rule of excitation frequency f on the amplitude of the damper based on the one-dimensional simplified analysis model; and determining parameter selection criteria of the main control type elastic support dry friction damper by combining the critical rotating speed requirement of the rotor system. Furthermore, the one-dimensional simplified analysis model of the master control type elastic support dry friction damper is a one-dimensional two-degree-of-freedom spring mass point model. Further, the one-dimensional simplified analysis model of the master control type elastic support dry friction damper comprises a dynamic mass block, equivalent mass points of a static friction plate and equivalent rigidity and damping of an elastic support. Further, the motion differential equation of the one-dimensional simplified analysis model of the master control type elastic support dry friction damper is as follows: Wherein x 1 is the displacement of m 1, x 2 is the displacement of m 2, sgn () is a sign function, k 1 is the bending rigidity of the elastic support of the squirrel cage, k 2 is the shearing contact rigidity of the contact interface of the dynamic friction plate and the static friction plate, c 1 is the structural damping coefficient of the elastic support of the squirrel cage, c 2 is the structural damping coefficient of the contact interface, F c is the coulomb friction between dynamic and static friction pairs, μ is the friction coefficient, N is the positive pressure exerted by the balancing weight, F x is the simple harmonic excitation force acting on m 1, fx=f 0cos (Ωt),F0 is the excitation force amplitude, Ω=2pi F is the excitation angular frequency, and F is the excitation frequency. Further, in the process of analyzing the rule of the influence of friction force on the amplitude of the damper, excitation parameters mu×n=3n, 4.5N and 9N are set, different N and mu are taken, F 0 =5n and f=130-140 Hz are taken, and the spring-support amplitude sweep frequency curve under three conditions is calculated. Further, in the process of analyzing the rule of influence of the excitation frequency F on the amplitude of the damper, the friction force is increased gradually, F 0 =5n, f=130-140 Hz, and the sweep frequency amplitude is calculated under the conditions that the friction force is larger than the excitation force amplitude 5N an