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Vibration analysis method of passive constrained damping rotating body structure

A passive constraint, vibration analysis technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem that the damping layer cannot obtain sufficient high precision.

Active Publication Date: 2015-04-22
HARBIN ENG UNIV
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Problems solved by technology

However, the above methods are difficult to apply to various boundary conditions such as classical boundary conditions and general elastic boundary conditions, and due to the use of thin shell theory, the accuracy cannot be obtained for thicker damping layers

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  • Vibration analysis method of passive constrained damping rotating body structure
  • Vibration analysis method of passive constrained damping rotating body structure
  • Vibration analysis method of passive constrained damping rotating body structure

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Embodiment Construction

[0033] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0034] combine figure 1 ~3, the concrete steps of the present invention are as follows:

[0035] 1) Extract the boundary condition information, size parameters and material property information of the passive constrained damping rotating body structure, where the boundary condition information will be converted into the assumed boundary spring stiffness value information;

[0036] 2) An orthogonal curve coordinate system (α, β, z) is established on the structure of the passively constrained damping rotating body, where α and β change along two orthogonal curves, z changes along the thickness direction, and R α and R β Set as the radius of curvature in the α and β directions, A and B are the Lame coefficients in the curvilinear coordinate system, and determine the specific coordinate system and parameter R according to the actual structure α , R β ,A,B.

[003...

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Abstract

The invention aims to provide a vibration analysis method of a passive constrained damping rotating body structure. The boundary condition information of the passive constrained damping rotating body structure is extracted; the passive constrained damping rotating body structure consists of two parts including a soft structure and a hard structure, wherein the soft structure is a middle damping layer, and the hard structure consists of an inner substrate, an outer substrate and a constrained layer; the soft structure and the hard structure are connected in a displacement way by an interlayer continuity condition; according to a first order shear deformation theory, relationship between middle surface strain and curvature and the relationship between the middle surface strain and displacement in the soft structure and the hard structure are independently determined, the total energy of the passive constrained damping rotating body structure is determined, a solver is established according to a Rayleigh-Ritz principle for solving, and the inherent frequency and the loss factor of the structure are output. The method can be used for solving a vibration problem and a damping analysis problem of the passive constrained damping rotating body structure under various complex boundary conditions including various classical boundary conditions, general elastic boundary conditions and non-uniform constraint boundary conditions.

Description

technical field [0001] The invention relates to a method for passive restraint damping structure vibration. Background technique [0002] The passive constrained damping rotating body structure is composed of the base layer, the constraining layer and the intermediate damping layer. Since the shear deformation of the damping layer will cause a large amount of energy dissipation, it can effectively suppress the vibration and sound radiation of the structure, and this structure can Light weight can obtain better damping effect, so passive restraint damping structure has been widely used in aviation, ship, automobile, pipeline transportation and other fields. [0003] At present, the content of research on passively constrained damping layer structures is mainly focused on the optimal design of structural parameters, that is, to determine the properties of damping materials, the number of layers, and the thickness of layers when the structural loss factor is maximized, and many...

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Application Information

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IPC IPC(8): G06F19/00G06F17/50
Inventor 靳国永杨传猛刘志刚张春雨王雪仁缪旭弘
Owner HARBIN ENG UNIV
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