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Method for quantitatively recognizing contribution amount of motor structural noise excitation source

A technology of noise excitation and motor structure, applied in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as quantitative analysis and rough determination

Active Publication Date: 2015-09-02
中国船舶重工集团公司第七一二研究所
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the traditional motor excitation source identification method that can only be roughly determined but not quantitatively analyzed, and provide a quantitative identification method for the contribution of the motor structure noise excitation source

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  • Method for quantitatively recognizing contribution amount of motor structural noise excitation source
  • Method for quantitatively recognizing contribution amount of motor structural noise excitation source
  • Method for quantitatively recognizing contribution amount of motor structural noise excitation source

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Embodiment Construction

[0018] Taking a large motor as an example, the present invention will be further described in conjunction with the accompanying drawings:

[0019] The main process of the present invention includes: establishing a transfer path analysis model, measuring point arrangement, transfer function test, working condition response test, contribution amount calculation, and result verification. details as follows:

[0020] 1. Establish a transmission path analysis model: During the operation of a large motor, the inner surface of the stator core is subjected to distributed electromagnetic force to generate vibration, and the bearing (as the connecting member of the motor rotor and stator) is excited by various forces in the rotor Vibration is generated due to the action of the motor, and the vibration is transmitted to the machine base, which eventually leads to the structural vibration noise of the motor foot. It can be determined that the main excitation source of the motor foot struc...

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Abstract

The invention relates to a method for quantitatively recognizing the contribution amount of a motor structural noise excitation source. The method comprises transfer function testing, operating condition response testing, and contribution amount calculation, and comprises steps of: establishing an excitation source-path-response transfer path analysis model and setting an excitation point, a target point, and a reference point; uninstalling the excitation source of the motor and performing local and global transfer function testing by means of a transfer function testing device and a hammering method; under a rated condition running status, testing the operating condition responses of the reference point and the target point by means of an operating condition response testing device; and calculating the contribution amount of a main motor excitation source to the structural noise of the target point by means of a contribution amount computing program. The method solves a limitation that a conventional recognition method is just capable of performing rough recognition but incapable of performing quantitative analysis, achieves quantitative calculation of the contribution amount of the main motor excitation source to the structural noise of the target point, and recognizes the main excitation source according to the contribution amount so as to guide motor structural acoustic design.

Description

technical field [0001] The invention relates to a method for quantitatively identifying the contribution of motor structural noise excitation sources, belonging to the field of motor structural acoustic design, suitable for quantitative analysis of the contribution of motor main excitation sources to target point structural noise and can guide the motor structural acoustic design. Background technique [0002] To assess the structural vibration and noise of a motor, it is only necessary to measure its vibration acceleration level, but in order to effectively control its structural vibration and noise, it is necessary to accurately find out the decisive excitation source in order to take targeted improvement measures, which requires the motor Identification of primary motivators. The identification methods of the main excitation source of the motor include step-by-step operation method, spectrum comparison method, coherence analysis method and partial coherence analysis metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
Inventor 余虎张国兵田磊谭登洪
Owner 中国船舶重工集团公司第七一二研究所
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