Discussion on the Vibration Signal of Landslide Dam Failure
碩士 === 國立中興大學 === 水土保持學系所 === 102 === The disaster of landslide dam occur frequently in recent years. In this study we use flume test simulating landslide dam to find out the characteristics of collapsing. We discuss in different flow, shapes of dam and set up acceleration sensor to gather vibration...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2014
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| Online Access: | http://ndltd.ncl.edu.tw/handle/25176688272935306452 |
| Summary: | 碩士 === 國立中興大學 === 水土保持學系所 === 102 === The disaster of landslide dam occur frequently in recent years. In this study we use flume test simulating landslide dam to find out the characteristics of collapsing. We discuss in different flow, shapes of dam and set up acceleration sensor to gather vibration signals when dams break. And we use the Hilbert-Huang Transform (HHT) to analyze the signals from dams collapsing, and also measure volumetric water content and electrical conductivity. The result has been shown that downstream slope of dam is a factor to influence the stability and erosion process of dam collapsing. After analyzing we found that variation of water level is similar to Intrinsic mode function 2 (IMF 2), and the main frequency of dam slide is 250 Hz to 450 Hz. It could be the forecast for dam failure when the electrical conductivity raises before dam sliding.
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