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 引用本文: 陈少林, 甄澄. 饱和地基上基础动力阻抗函数的一种分析方法[J]. 力学学报, 2012, 44(2): 393-400.
Chen Shaolin, Zhen Cheng. DYNAMIC IMPEDANCE OF FOUNDATION ON SATURATED POROELASTIC SOIL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2012, 44(2): 393-400.
 Citation: Chen Shaolin, Zhen Cheng. DYNAMIC IMPEDANCE OF FOUNDATION ON SATURATED POROELASTIC SOIL[J]. Chinese Journal of Theoretical and Applied Mechanics, 2012, 44(2): 393-400.

## DYNAMIC IMPEDANCE OF FOUNDATION ON SATURATED POROELASTIC SOIL

• 摘要: 提出了一种基础阻抗函数的时域求解方法, 并用于饱和地基情形. 通过给基础输入脉冲位移, 应用集中质量显式有限元方法结合局部透射人工边界, 得到地基施加于基础的反力时程, 然后根据阻抗函数的定义, 应用傅立叶变换求得基础阻抗函数. 通过算例, 与 Halpern 的结果进行了对比, 验证了该方法的有效性. 并以一方形基础为例, 分别讨论了泊松比、孔隙率、渗透系数和埋深对无量纲动力柔度的影响. 与以往方法相比, 该方法可以考虑复杂地基情形和不规则基础形式.

Abstract: Based on the method of lumped-mass explicit finite element and local transmitting artificial boundary, a time domain method is presented for the computation of dynamic stiffness of rigid foundations resting on or embedded in saturated poroelastic soil. The two-phase behavior of porous medium is represented according to Biot's theory. The technique is applied to the computation of dynamic stiffness of rigid plate on a saturated poroelastic half-space. Compliance component are computed and compared with existing results. The effects of properties of porous medium and the embedded depth on the dynamic stiffness are examined. The method presented in this paper is able to represent more general properties and geometries of soil and foundation than the existing approaches do.

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