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| DYNAMIC FINITE ELEMENT METHOD FOR EXCAVATION PROCESS SIMULATION OF ROCK SLOPE |
| YIN Desheng1，2，WANG Weiming2，CHEN Shenghong2 |
| (1. College of Hydraulic and Environmental Engineering，China Three Gorges University，Yichang，Hubei 443002，China；2. State Key Laboratory of Water Resources and Hydropower Engineering Science，Wuhan University，Wuhan，Hubei 430072，China) |
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Abstract Referring to the numerical manifold method，the dynamic finite element method with fixed meshes for the excavation simulation of complex slope is presented. By using the new method，only the discontinuous surface and complex terrain should be taken into account but not the explicit excavated elements. The location of excavated surface is just considered as an inputted real-time dynamic parameter. So，the time-consuming of the preprocess can be significantly deduced. The domain is divided into two parts：the reserved domain and excavation domain，which are determined with the help of geometric topology. By using the intensive Gauss numerical integration method，the total stiffness from the reserved domain and total load vector from the excavation domain are assembled with the displacement interpolation model of normal finite element method. Based on the principle above，the calculating procedure is programmed. The excavation simulation of Kongquegou slope of Xiaowan arch dam is studied by the new procedure. The results are in accordance with those from the general finite element method. The precision and validity of the new method are proved. The biggest advantage of the method is that the preprocessing is very simple；and it can be used in the excavation simulation and shape optimization for complicated slopes and caverns.
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Received: 04 May 2011
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2011, Vol. 30 
