Optimum design method of particle damper

A particle damper and optimized design technology, which is applied in the direction of instruments, calculations, special data processing applications, etc., can solve problems such as difficult to obtain analytical solutions for the system

Inactive Publication Date: 2015-02-25
TONGJI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

For the multi-particle damper structure, the interaction between particles also needs to be considered, and it is difficult to obtain an analytical solution for the system, so scholars are generally looking for a simplified method and a numerical method

Method used

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  • Optimum design method of particle damper
  • Optimum design method of particle damper
  • Optimum design method of particle damper

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0035] This example is an optimized design of the size of the additional particle damper on the main structure of the three-layer frame. The main structure is a three-layer frame structure, and the actual masses of the first to third floors are 1915 kg, 1915 kg and 2124 kg respectively. The damping ratio of the frame is 0.013, the first three natural frequencies are calculated to be 1.07 Hz, 3.2 Hz and 4.8 Hz respectively, the stiffness matrix of the main structure .

[0036] figure 1 The block diagram of the particle assembly generated by computer simulation is to use spherical particles with the same radius, assuming that the spatial geometric positions are randomly distributed, and after a certain number of particles are generated in the container, they will fall freely and accumulate under the action of gravity alone, thereby randomly ...

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Abstract

The invention discloses an optimum design method of a particle damper. A spherical particle discrete element model is established according to the discrete element method theory, and a method for producing random particle combination in a boundary in a certain shape in a simulated mode is developed; the contact collision relation between particles or between the particles and a container is simulated through the non-binary search contact inspection algorithm; the concept of effective momentum exchange is introduced, and the method for reasonably and quantitatively analyzing the particle damper performance is developed. According to the optimum design method, the procedures of particle damper analogue simulation, parameter study and performance analysis are developed based on the discrete element method theory, a traditional design method depending on the phenomenology experimental analysis is broken through, and a new way is developed for optimization design of the particle damper.

Description

technical field [0001] The invention belongs to the field of civil engineering and relates to an optimal design method of a particle damper. Background technique [0002] Due to the advantages of simple concept, low cost, and suitable for harsh environments such as high temperature, radiation, and corrosion, particle damping has become a future trend in the field of vibration control of civil structures (including high-rise buildings, high-rise structures, and bridge structures, etc.). Recently, numerical simulation studies of particle dampers have mainly focused on single particle damper structures, but such simulations lack generality. For the multi-particle damper structure, the interaction between particles also needs to be considered, and it is difficult to obtain an analytical solution for the system, so scholars are generally looking for a simplified method and a numerical method. [0003] Because the discrete element method can consider the interaction between parti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 鲁正张鼎昌
Owner TONGJI UNIV
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