A simplified analysis method for mid-frequency dynamic response prediction considering non-resonant transmission

An analysis method and dynamic response technology, applied in design optimization/simulation, calculation, special data processing applications, etc., can solve problems such as the small proportion of power transmission, improve prediction efficiency, simplify analysis methods, and ensure analysis accuracy Effect

Active Publication Date: 2018-05-15
SOUTHEAST UNIV
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Problems solved by technology

However, not all power transfers between non-resonant modes are negligible, and the proportion of power transfer between modes with large differences in natural frequencies is negligible

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  • A simplified analysis method for mid-frequency dynamic response prediction considering non-resonant transmission
  • A simplified analysis method for mid-frequency dynamic response prediction considering non-resonant transmission
  • A simplified analysis method for mid-frequency dynamic response prediction considering non-resonant transmission

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] Such as figure 1 Shown is a logic flow diagram of a simplified analysis method for mid-frequency dynamic response prediction considering non-resonant transmission, which mainly includes the following steps:

[0046] Step (1) Divide the system into continuously coupled subsystems; use imaginary interfaces to divide the system into continuously coupled subsystems, and approximate the boundary conditions of the subsystems on the coupled interfaces, assuming that the more rigid subsystems are at The coupling interface is a free boundary, and the vibration of the subsystem is described by the displacement mode; it is assumed that the softer subsystem is fixedly supported on the coupling interface, and the vibration of the subsystem is described by the stress mode.

[0047] Step (2) Calculating the modes of the subsystem; specifically, calculating the mode parameters...

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Abstract

Disclosed is a simplified analysis technique for intermediate-frequency dynamic response prediction related to non-resonant transmission, comprising the following steps: (1) dividing a system into continuously coupled sub-systems; (2) calculating a mode of the sub-systems; (3) calculating a coupling parameter between modes within a specific frequency band in adjacent sub-systems; and (4) establishing a system power balance equation, and calculating an intermediate-frequency dynamic response of the sub-systems. The present invention proposes a simplified analysis technique for an intermediate-frequency dynamic response prediction method related to non-resonant transmission, to improve the analysis efficiency of the method. The intermediate-frequency dynamic response prediction method is a hybrid method combining a statistical modal energy distribution analysis method and statistical energy analysis; the method can consider the influence of power transmission between non-resonant modes, and can precisely predict the intermediate-frequency response in a system in which a "rigid" sub-system and a "flexible" sub-system coexist.

Description

technical field [0001] The invention relates to the technical field of intermediate frequency dynamic response prediction, in particular to a simplified analysis method for intermediate frequency dynamic response prediction considering non-resonant transmission. Background technique [0002] There may be both "rigid" and "soft" parts in a complex system. In the mid-frequency band, the "rigid" part has a longer vibration wavelength and sparse modes; the "softer" part has a shorter vibration wavelength and dense local modes. For this type of system, a single dynamic response prediction method is no longer applicable. The SmEdA-SEA hybrid method can effectively solve the mid-frequency dynamic response prediction problem of the system when the "rigid" subsystem and the "soft" subsystem coexist. In this method, the statistical modal energy distribution analysis theory is used to describe the "rigid" subsystem, and the statistical energy analysis theory is used to describe the "...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 费庆国张鹏李彦斌吴邵庆陈强姜东
Owner SOUTHEAST UNIV
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