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Dynamics analyzing method and device for coupled system/structure

A technology for dynamic analysis and coupled systems, applied in the field of dynamic analysis of coupled systems/structures

Inactive Publication Date: 2018-09-14
管迪华
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Problems solved by technology

[0007] Therefore, for coupled structures / systems, a modal synthesis model of frictional closed-loop coupling including system design factors is established, and studies have shown that this model is useful for analyzing and finding reasonable design parameter matches to solve system dynamic problems, especially vibration noise problem, is an effective way to

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  • Dynamics analyzing method and device for coupled system/structure
  • Dynamics analyzing method and device for coupled system/structure

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specific example

[0090] A specific example of the dynamic analysis method of the coupling system according to the present invention will be described in detail below, which integrates the above three analysis methods.

[0091] In the embodiment of the present invention, the brake system for a vehicle mainly includes five substructures A, B, C, D and E, which respectively represent the outer brake pad (A), brake disc (B), inner brake plate (C), caliper (D) and bracket (E), such as figure 2 shown. The complex eigenvalue analysis of the brake system modeling shows that the noise modal frequency to be analyzed is 13045Hz, which is consistent with the actual situation.

[0092] The substructure modal composition analysis of the noise mode (frequency 13045Hz) was carried out, and the substructure modal composition coefficient of the noise mode was calculated, which is listed in Table 1 below. Table 1 only lists the first 10 substructure modal constituent coefficients of the noise mode in descendi...

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Abstract

The invention discloses a dynamics analyzing method and device for a coupled system / structure. The dynamics analyzing method comprises the following steps that a) a modal comprehensive model of the coupled system is constructed, complex eigenvalue calculation analysis is carried out on the coupled system, and the problem mode is found out; b) substructure mode constituent analysis is carried out on the analyzed problem mode; c) regarding the problem mode, substructure modal mode parameter sensitivity analysis is carried out; d) regarding the problem mode, energy feed-in analysis is carried outon the coupled system; e) according to the substructure mode constituent analysis in the step b) and the sensitivity analysis influencing the problem mode in the step c) and the energy feed-in analysis result in the step d), an optimized design or a modified scheme for the coupled system is determined to inhibit or eliminate vibration and noises of the coupled system; f) according to the determined optimized design or modified scheme, parameter matching or parameter modification is carried out on a sub-structure or a sub-component of the coupled system to achieve product optimization.

Description

technical field [0001] The invention relates to a dynamic analysis method and device for a coupled system / structure based on a modal synthesis model of the coupled system / structure. Background technique [0002] With the progress and development of science and technology, and the higher and higher requirements for product performance, the application of coupled systems or coupled structures will be involved in various technical fields. Coupling systems / structures typically include multiple substructures and / or submodules, each with different mechanical properties, material properties, etc. For example, the braking system of an automobile can be regarded as a coupling system, which is a more complex system including multiple components such as a brake disc, a brake caliper, and a bracket, and includes friction coupling. Due to the different mechanical and material properties of its substructures or components and the geometric parameters determined by their functions, effect...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23
Inventor 管迪华
Owner 管迪华
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