Dynamic Response Characteristics of Large Homogeneous Rock Slopes Based on Modal Analysis
[1]SONG Danqing,DONG Lihu,CHEN Zhuo,et al.Dynamic Response Characteristics of Large Homogeneous Rock Slopes Based on Modal Analysis[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):1-6.[doi:10.13705/j.issn.1671-6833.2020.06.010]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42
Number of periods:
2021 02
Page number:
1-6
Column:
Public date:
2021-04-12
- Title:
- Dynamic Response Characteristics of Large Homogeneous Rock Slopes Based on Modal Analysis
- Keywords:
- large homogeneous rock slope; FEM; modal analysis; natural frequency; vibration mode; dynamic response characteristic
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2020.06.010
- Abstract:
- The large homogeneous rock slopes were taken as the research object.Two 3D FEM numerical models were established, the modal analysis of rock slope was carried out by the FEM. The natural frequency of the slopes and the corresponding vibration modes were obtained. The relationship between the dynamic response characteristics of the slopes and their inherent mode was studied in the small strain range. The results showed that the natural frequency of the slopes increased with the order, and the slope had the typical slope elevation and surface dynamic amplification effect. The gradient changes of the slope surface had a great influence on the natural frequencies and vibration modes of the slopes. Low-order (1st and 2nd order) natural frequencies mainly caused the overall deformation of the slopes, while high-order (≥3rd order) natural frequencies mainly caused local deformation of the slope surface. The modes below the fifth order were mainly characterized by a single deformation of bending, stretching or torsion, while those above the fifth order were characterized by a variety of deformation combinations.
- References:
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Last Update:
2021-05-30