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Ship cabin noise transmission path analysis method

A technology of noise transmission and path analysis, applied in the field of ships, can solve the problems of huge cost, large ship size, and large number of sound sources, and achieve the effect of reducing space and weight, good noise reduction effect, and improving economy.

Pending Publication Date: 2020-02-21
SHANGHAI MERCHANT SHIP DESIGN & RES INST
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Problems solved by technology

[0004] The traditional noise transfer path analysis method is not suitable for the field of ship cabin noise prediction and control. The reasons are as follows: 1. The cabin noise prediction work is mostly carried out in the initial stage of ship design. It is not possible to carry out actual ship testing at this stage; 2. The ship is large in scale, complex in structure, and has a large number of sound sources, so testing one by one requires huge costs

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  • Ship cabin noise transmission path analysis method
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  • Ship cabin noise transmission path analysis method

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Embodiment Construction

[0034] A preferred embodiment will be given below, and the present invention will be described more clearly and completely in conjunction with the accompanying drawings.

[0035] Such as figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 Shown, a kind of ship cabin noise transfer path analysis method, it comprises the following steps:

[0036] Step 1. According to the ship drawings, establish a statistical energy analysis model for analyzing ship cabin noise. The statistical energy analysis model is established by the statistical energy analysis method. The statistical energy analysis method is a mature method at present, so it will not be repeated here.

[0037] Step 2. According to the drawings and documents, set the excitation source, and set the properties of each subsystem in the statistical energy analysis model, including parameters such as material properties, structure and acoustic cavity damping loss factor.

[0038] Step 3. Calculate the internal loss ...

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Abstract

The invention discloses a ship cabin noise transmission path analysis method, which comprises the steps of establishing a statistical energy analysis model according to a ship drawing; setting attributes of each subsystem in the statistical energy analysis model according to drawings and data; calculating an internal loss factor of each subsystem and a coupling loss factor between the subsystems,and establishing a loss factor matrix of the whole system; converting the loss factor matrix into a path efficiency matrix, and establishing a path efficiency weighting graph for noise transmission path analysis; and solving the first k shortest paths of the weighted graph by using an algorithm of the shortest path problem, so as to obtain the first k noise energy transfer paths from the noise source to the target cabin. The cabin noise transmission path analysis work can be completed at the initial stage of ship design, the limitation that real ship test analysis can only be conducted after aship is built is overcome, guidance can be provided for subsequent noise reduction design, and the cabin noise transmission path analysis method has the obvious effects of saving cost and reducing space and weight occupation.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a method for analyzing the transmission path of noise in a ship cabin. Background technique [0002] The traditional noise transfer path analysis is based on the test, that is, the exciter is used to excite the excitation point, the response of the system is measured, and then the transfer function of the system is calculated, and then the quantitative analysis is completed. [0003] Most of the existing public reports focus on the automobile industry, and there are relatively few studies on the noise transmission path in the shipbuilding industry. Chen Changsheng et al. ("Ship Engineering" Supplement 2, Volume 41, 2019) analyzed the vibration transmission path of the motor bench through the test method, and determined the main contribution path of the force source vibration; Li Wenwu et al. ("Noise and Vibration Control, Volume 39, Issue 1, February 2019) analyzed the noise trans...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F119/10
Inventor 赵欣棠许斐张青敏樊祥栋何凯
Owner SHANGHAI MERCHANT SHIP DESIGN & RES INST
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