一、前言大型振动台推力大、工作频率范围宽,多向振动的振动台存在不同振型间的耦合影响。若基础设计不当,将产生强烈振动,对周围环境造成公害且不能保证振动台正常运转。目前,基础动力分析普遍采用Barkan提出的地基刚度系数法。但此法未考虑幅射阻尼,在理论和实用上均有缺陷。我国的“动力机器基础设计规范”亦有待改进,对于计算大型振动台基础的动力反应尚有其局限性。有限单元法和弹性半空间集总参数法是分析大型复杂基础振动的有效手段。木文从工程实用 I. INTRODUCTION LARGE VIBRATION TUNNEL LARGE LARGE, FULLY OPERATING FREQUENCY, MULTI-VIBRATION VIBRATION TEST There are coupling effects between different modes. If the basis of improper design, will have a strong vibration, causing pollution to the surrounding environment and can not guarantee the normal operation of shaker. At present, the foundation dynamic analysis commonly used Barkan proposed foundation stiffness coefficient method. However, this method does not consider radiation damping, both in theory and in practice. Our country’s “Power Machinery Basic Design Code” also needs to be improved, and there are limitations on the dynamic response to the calculation of large-scale shaking table. Finite element method and elastic half-space lumped parameter method is an effective method to analyze the vibration of large complex foundation. Wood works from the project