A Harmonic Response Analysis Method for Granular Damping Structures

Abstract

The invention discloses a harmonic response analysis method of a particle damping structure, and aims to be suitable for any structure applied with a particle damper to carry out harmonic response analysis and provide convenient and effective simulation for simulation calculation associated with particle damping research and application, and the method is simple, convenient in operation and high in universality. The harmonic response analysis method adopts the following technical scheme: (1) a structure to be analyzed is subjected to model establishment, meshing, boundary condition and force stimulation applying and corresponding parameter setting; (2) the particle damping is applied to the structure to be analyzed; (3) iterative solving is carried out; and (4) post-processing is carried out to check a relevant result, such as an amplitude-frequency response curve, on a certain node on the structure.

Description

technical field [0001] The invention belongs to the field of vibration reduction and noise reduction, and in particular relates to a harmonic response analysis method of a particle damping structure. Background technique [0002] Particle damping technology has the following advantages: simple structure, low cost, easy implementation, ability to work normally in harsh environments, and small additional mass, thereby overcoming the shortcomings of traditional damping technology; and has been used in steam turbine blades, liquid oxygen rocket engine T-type guide Launders, armored personnel carriers, air-jet loom racks, aerospace radar antenna sampling columns, steel rolling cold saws, financial banknote binding machines, IC post-packaging equipment and large machine tools have been applied in various engineering fields and occasions. It is a worthy Promote and apply damping technology with broad prospects. [0003] Particle damping technology is implemented by granular materi...

AI Technical Summary

Problems solved by technology

At present, only a few software such as EDEM and COMSOL can be used to simulate and analyze the structure with particle damping, otherwise it is necessary to carry out programming calculations; this limits the research and application of particle damping

[0007] (2) There are huge problems with the software or methods available for simulation

For EDEM, COMSOL and self-programming methods, there are corresponding problems: EDEM is mainly used to simulate the behavior characteristics of bulk material particle systems, but it is very difficult to model structures with particle damping, and the relationship between discrete units Connected through a spring damping system, the amount of data and calculation is large, and the calculation takes a long time

The mesh function of COMSOL is not perfect, importing the mesh divided by other software cannot realize mesh editing, and the mesh generated by COMSOL is of poor quality and is not suitable for complex structures; in addition, COMSOL is not widely used, and its The operation requires a large amount of memory and CPU, and the number of units that can be calculated is easily limited by the hardware

Self-programming can theoretically realize the simulation calculation of any structure, but it is not suitable for complex structures because of its huge workload

[0008] (3) There is no specific particle damping model, which is not conducive to practical application

[0009] Therefore, in view of the above problems, it is necessary to carry out new development on particle damping; to make the particle damping model concrete and make it easy to operate and model in software; The problem of memory and CPU overcomes the difficulty in processing complex structural grids, and the simulation calculation is limited by computer hardware due to the large number of large structural units.

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