...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Computers and Geotechnics >Estimation of Natural periods of Earth Dam-Flexible canyon systems with 3D coupled FEM-SBFEM
【24h】

Estimation of Natural periods of Earth Dam-Flexible canyon systems with 3D coupled FEM-SBFEM

机译：3D耦合FEM-SBFEM的地球坝柔性峡谷系统自然时期估算

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The geometry and flexibility of a canyon are the parameters that greatly affect the value of natural periods in earth dams. The canyon surrounding dams can be assumed as an unbounded domain. To take into account these two effects, the canyon was modeled by SBFEM and the earth dam, which has limited geometry, by FEM. The hybrid technique of SBFEM-FEM for dynamic three dimensional analysis of soil-earth dam interaction was validated with available results in the literature. Because the dynamic-stiffness matrix of the unbounded domain is complex and frequency dependent, the classical mode-superposition method is not straightforward for the soil-structure interaction system. Thus, to obtain the fundamental natural frequency, the dam was excited in the upstream-downstream direction. The natural period of the earth dam for canyons with different geometry shapes and impedance ratios were obtained. They were found to have significant effects on the natural period. The results were compared with actual recorded data. It was found that the proposed graphs in this study may be used by practical engineers for the estimation of natural periods of earth dams in canyons with different shapes and material properties.
机译：峡谷的几何形状和灵活性是极大地影响土坝中自然时期的价值的参数。峡谷围绕水坝可以被认为是无限的域。要考虑到这两种效果，峡谷由SBFEM和地球大坝建模，由FEM具有有限的几何形状。 SBFEM-FEM用于动态三维分析的SBFEM-FEM的混合技术验证了文献中的可用结果。因为无界结构域的动态刚度矩阵是复杂的并且频率相关，所以经典模式 - 叠加法对于土壤结构相互作用系统并不直接。因此，为了获得基本的自然频率，大坝在上游下游方向上兴奋。获得了具有不同几何形状和阻抗比的峡谷的地球坝的自然周期。他们被发现对自然时期产生显着影响。将结果与实际记录数据进行比较。发现本研究中提出的图表可以由实际工程师使用，以估计具有不同形状和材料特性的峡谷中的地球坝的自然周期。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号