Method for predicting dynamic stability of eccentric rotating annular periodic structure

A technology of stability prediction and periodic structure, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low calculation efficiency and failure to reveal universal laws, and achieve the effect of improving stability and reliability

Active Publication Date: 2021-01-26
TIANJIN UNIV
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Problems solved by technology

[0005] It should be pointed out that in the existing literature, there are relatively few studies on the dynamics of ring periodic structures under eccentric motion
In addition, the existing technology uses numerical methods to predict dynamic stability, which has low computational efficiency and cannot reveal universal laws

Method used

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  • Method for predicting dynamic stability of eccentric rotating annular periodic structure
  • Method for predicting dynamic stability of eccentric rotating annular periodic structure
  • Method for predicting dynamic stability of eccentric rotating annular periodic structure

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0043]The present invention is aimed at the circular periodic structure widely used in the engineering field, and under the premise of considering the eccentric motion, the influence of the periodic distribution characteristics and eccentricity on the natural frequency and dynamic stability is studied. The internal force distribution of the structure is calculated by the microelement method and the superposition principle, and the dynamic model is established in the inertial system according to the Hamilton principle. The classical vibration theory is used to solve the eigenvalues, and the modal characteristics and instability under different parameter combinations are analyzed. The ...

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Abstract

The invention discloses a method for predicting the dynamic stability of an eccentric rotation annular periodic structure, and the method comprises the steps: calculating the internal force distribution of the structure through employing an infinitesimal method and a superposition principle under the condition that the eccentric movement is considered, and obtaining an analytical dynamic model under an inertial coordinate system through a Hamilton principle and a Galerkin method. Characteristic values are solved by adopting a classical vibration theory, and modal characteristics and instability of the annular periodic structure under different parameter combinations are analyzed. According to the method, the problems of insufficient consideration of actual working conditions, tedious and complex simulation process and inaccurate analysis result prediction of an existing annular periodic structure vibration analysis technology are well solved, and reference is provided for parameter design and vibration control of the structure in engineering practice.

Description

technical field [0001] The invention relates to the field of vibration of ring-shaped periodic structures, in particular to a method for predicting the dynamic stability of eccentrically rotating ring-shaped periodic structures. Background technique [0002] Various rotating components are widely used in engineering practice to realize the functions of transmission, drive and energy conversion, such as gear transmission, rolling bearings and rotating motors. The annular periodic structure used in this type of component is usually formed by a number of symmetrical units with the same configuration and geometric parameters through a circular array, such as ring gear, inner and outer rings, and stator and rotor. This rotationally symmetrical design is conducive to achieving load balance and improving structural stability. However, in engineering practice, due to the special requirements of the application on the form of motion, or unavoidable manufacturing and installation err...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/17G06F119/14
CPCG06F30/20G06F30/17G06F2119/14
Inventor 王世宇李海洋王姚志豪夏春花刘晨王久霞
Owner TIANJIN UNIV
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