Method for determining vibration response of line-connected structure with parallel connecting lines

A technology of vibration response and structural vibration, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as large amount of calculation and increased analysis frequency

Active Publication Date: 2012-06-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the disadvantages of the existing method that the calculation amount increases with the increase of the analysis frequenc

Method used

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  • Method for determining vibration response of line-connected structure with parallel connecting lines
  • Method for determining vibration response of line-connected structure with parallel connecting lines
  • Method for determining vibration response of line-connected structure with parallel connecting lines

Examples

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Embodiment Construction

[0025] Describe the present invention below in conjunction with specific embodiment:

[0026] The model used in this example is attached figure 2 As shown, it is a coupling structure between the plank and the cylindrical shell. There are two connecting lines between the plank and the cylindrical shell, and the two connecting lines are parallel to image 3 In the x-axis, in the model, the cylindrical shell is not externally excited, and the plank is excited by the external simple harmonic point force. In order to obtain the vibration power flow characteristics of the plate and shell structure, this embodiment adopts the following steps:

[0027] Step 1: Take the connecting line as the boundary, divide the line connecting structure into N substructures; in this embodiment, there are two connecting lines, use the connecting line as the boundary, divide the line connecting structure between the decking and the cylindrical shell into two parts: the cylindrical shell and the decki...

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Abstract

The invention discloses a method for determining the vibration response of a line-connected structure with parallel connecting lines. The method comprises the following steps of: dividing the line-connected structure into a plurality of substructures, establishing a vibration response expression of all the substructures at own connecting lines, obtaining a coupling force applied to each substructure by using a continuity equation for boundaries at the connecting lines, and substituting each coupling force back into a corresponding vibration response expression to obtain the vibration response and power flow of a corresponding substructure at own connecting lines. An improved substructure line mobility method is provided by combining the substructures and line mobility, and the connecting lines are processed as basic units, and are prevented from being dispersed into a series of points and processed point by point, so that the vibration response of the line-connected structure can be determined within a wideband range, and a calculated amount is not sharply increased along with the increasing of frequency.

Description

technical field [0001] The invention relates to the technical field of structural vibration response, in particular to a method for determining the vibration response of a line joint structure in which joint lines are parallel to each other. Background technique [0002] Line connection structures, such as the coupling structure of planks and cylindrical shells, are widely used in engineering, and most of them have the feature that the connection lines are parallel to each other. When the line connection structure is excited, the vibration energy on the directly excited substructure will be transmitted to other unexcited substructures through the connection line, so that the whole structure will vibrate and radiate noise outward, so the vibration characteristics of the line connection structure are studied It has important engineering significance. [0003] In the past, researchers used the substructure method to analyze the vibration power flow characteristics of line join...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 盛美萍赵芝梅杨阳张安付
Owner NORTHWESTERN POLYTECHNICAL UNIV
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