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Performance Study of Particle Damper

Author: HuangYunWen
Tutor: ZuoWeiMing
School: Beijing University of Technology
Course: Structural Engineering
Keywords: Building structure Particle damper Discrete Element Method Energy than Cluster effect
CLC: TU352.1
Type: Master's thesis
Year: 2011
Downloads: 133
Quote: 0
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Abstract


The particle damping concept as early as the 1960s had already put forward, but after research was at a standstill for a long time are not perfect in terms of theoretical or experimental studies or numerical simulation. When first the nineties, the use of particle energy consumption ideas began to be realized in areas such as aviation and mechanical, so a lot of machinery and equipment, vehicles, vibration levels have been significantly reduced. Recent years, in view of the excellent damping properties of the particle damping, scholars in the field of civil engineering introduced to the field of building structures. On the basis of summing up in recent years, at home and abroad on the research and application of particle damper energy dissipation mechanism and performance of its theoretical analysis, numerical simulation and experimental studies, the main tasks include the following aspects: 1. Summarizes and analysis of the existing damper on the performance advantages and disadvantages, and to clarify about the the particle damper existing research in areas such as mechanical and aerospace superiority of particle dampers used in the field of building structures may have to be resolved issues; summarized and derived particle damper equations of motion and this article Experimental research and numerical simulation for the lack of research on the theory of particle damper will be used in energy-intensive formula and performance indicators; 3. use ANSYS LS \\ DYNA, PFC3D software to simulate the performance of the particle damper, both software and the applicability of the particle damper, and pointed out its shortcomings. Prepared based on MATLAB environment related procedures studied particle damper SDOF structure forced vibration damping performance, and proposed to the ratio of the total energy in the energy consumption and shock absorption cushioning after (ie, the energy dissipation coefficient) displacement and shock absorption before and after the peak than to evaluate particle damper damping capacity. On this basis, the analysis of particle density, particle size, friction coefficient, the cavity length, structural natural periods of ground motion amplitude and spectral characteristics of the parameters on the performance of the particle damper; 5. Single degree of freedom of the steel framework of the free vibration test, the initial displacement, mass ratio, the filling factor of the cavity length, friction coefficient, particle size change, the natural vibration frequency and arrangement studied particle damper performance test results The trend is more consistent with the numerical simulation results.

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CLC: > Industrial Technology > Building Science > Building structure > Special Structure > Anti - shock structure,disaster prevention structures > Shock, isolation, and explosion-proof structure
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