三向六自由度大型模拟地震振动台基础动力分析计算

Dynamic Analysis and Calculation of the Large Scale Six Degree of Freedom Shaking Table Foundation

应用质量-阻尼-弹簧简化模型对三向六自由度大型模拟地震振动台进行动力反应计算,文中讨论了振动参数的确定方法。大型振动台基础自振频率通常都在振动台工作频率范围之内,必须考虑基础共振的影响。在进行基础设计时,着重要考虑基础振动幅值以及基础振动对周边环境的影响。

In this paper, based on a mass-damper-spring mode, provides the calculation and analysis of foundation about six degree of freedom shaking table. The methods for determining vibration parameters have also been discussed. The analysis indicates that the foundation's resonant vibration should be estimated since its natural frequency is within the working frequency range of seismic test system. In addition, vibration amplitude of the foundation and its effect on the environment ought to be paid more attention during the foundation design.