An indirect test method for multi-degree-of-freedom vibration excitation force of multi-surface installation equipment

Abstract

The invention discloses an indirect testing method of a multi-degree-of-freedom vibrating exciting force of a multi-surface mounting device. The method is used for performing indirect testing for the multi-degree-of-freedom excitation of a multi-point multi-surface elastic supporting device; the method is high in accuracy. According to the indirect testing method, the multi-degree-of-freedom excitation of a multi-point multi-directional elastic supporting mechanism can be obtained, and the vibration exciting force of a plurality of mounting surface mechanical devices can be tested; the mutual coupling effect of a plurality of supporting points among a plurality of directions is considered, so that the testing result is accurate.

Description

technical field [0001] The invention relates to the technical field of ship acoustic stealth, in particular to an indirect test method for multi-degree-of-freedom vibration excitation force of multi-face installation equipment. Background technique [0002] As the necessary input data for the estimation of ship vibration energy transfer and vibration-acoustic radiation, the vibration excitation force of mechanical equipment is an indispensable input parameter for the quantitative acoustic design of ships. In addition, through the inspection of the vibration and noise excitation characteristics of the equipment and the assessment based on the overall limit requirements, it is determined whether the equipment is allowed to be installed on the ship, which is an important way to control the radiated noise of the ship in the project. However, the test method of the vibration excitation force output by mechanical equipment is not perfect, and the indirect test method has not been ...

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Problems solved by technology

[0003] Existing methods are mainly aimed at the vibration excitation force transmitted by mechanical equipment through a single vibration isolator, such as "Analysis of Acoustic Vibration of Single Double-layer Cylindrical Shell under Multiple Excitation Actions" published by Gao Ju in 2011, " The excitation force of the equipment on the hull structure and its application”; the existing methods mainly focus on the vibration excitation force in the direction perpendicular to the installation plane of the mechanical equipment in a single vibration direction, and the excitation characteristics of the translational and rotational degrees of freedom in other directions have not been studied Research, such as "Research on the Test Method of Mechanical Equipment Vibration Source Characteristics" published by Yuan Chunhui in 2006, Hu Yinyin and others also pointed out in the article "Research Status of Equipment Load Identification and Excitation Source Characteristics" in 2011: The research on the identification of mechanical equipment excitation force will From single-point and single-direction incentives to multi-point and multi-directional incentives

At present, there is no recognized and perfect method for the characterization of the vibration output excitation force of mechanical equipment with multi-point and multi-directional coupling.

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