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Full frequency-domain calculation method of vibration noise of gear case

A technology of vibration noise and calculation method, applied in the field of calculation, can solve complex problems

Pending Publication Date: 2017-02-15
中国船舶重工集团公司第七0三研究所
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Problems solved by technology

For the middle frequency band, due to the characteristics of the low frequency band and the high frequency band, the problem of the middle frequency band is more complicated to deal with than the low frequency band or the high frequency band. At present, the method of effectively and accurately calculating the vibration noise in this frequency band is still research and development
[0006] Since different frequency bands have their own characteristics, there is currently no method that can effectively analyze the vibration and noise of gearboxes in the full frequency domain.

Method used

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  • Full frequency-domain calculation method of vibration noise of gear case
  • Full frequency-domain calculation method of vibration noise of gear case
  • Full frequency-domain calculation method of vibration noise of gear case

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Embodiment Construction

[0030] Referring to each figure, a method for calculating the vibration noise of a gearbox in the full frequency domain, including the low-frequency band of the vibration noise of the gearbox and the high-frequency band of the vibration noise of the gearbox, is characterized in that: the low-frequency band of the vibration noise of the gearbox adopts finite elements or boundary elements The solution is based on the discrete analysis method of the unit, and the high-frequency band of the vibration noise of the gearbox is solved by the statistical energy analysis method, and the full frequency domain of the vibration noise of the gearbox is calculated by combining the finite element or boundary element and the statistical energy analysis method. The calculation method is as follows:

[0031] Step 1: Determine the corresponding grid size according to the computing power of the computer and the acceptable calculation time, and then determine the upper limit of the calculation of the...

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Abstract

The invention provides a full frequency-domain calculation method of vibration noise of a gear case, and relates to the technical field of calculation methods. The vibration noise of a low-frequency part in the gear case is determined by using a finite element-boundary element method; the vibration noise of a high-frequency part in the gear case is determined by using statistic energy analysis; and full frequency-domain calculation of the vibration noise is achieved by reasonably using a finite element and the statistic energy analysis according to the size relationship among an upper limit frequency calculated by the finite element, a lower limit frequency of the statistic energy analysis and a to-be-analyzed highest frequency. According to the full frequency-domain calculation method of the vibration noise of the gear case, full frequency-domain analysis of the vibration noise of the gear case can be effectively carried out according to respective characteristics of different frequency bands.

Description

[0001] Technical field: [0002] The invention relates to the technical field of calculation methods, in particular to a full-frequency domain calculation method for vibration noise of a gearbox. [0003] Background technique: [0004] For gearboxes, the general excitation frequency ranges from zero to several thousand Hz, and the resulting vibration noise is distributed between 0 and 20,000 Hz. According to the relationship between the wavelength and the characteristic size of the structure, or according to the relationship between the overall vibration and the proportion of local vibration in the entire structural vibration, the vibration noise of the gearbox in the full frequency range can be divided into three frequency bands: low frequency, high frequency, and intermediate frequency . [0005] For the calculation of low-frequency bands, due to the sparse structural modes, the dynamic characteristics of the structure are mainly based on the overall mode, and it is sensitiv...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F2119/10G06F30/23
Inventor 王鑫王梦琪张晓旭高长伟邹璇刘英伦
Owner 中国船舶重工集团公司第七0三研究所
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