Improved numerical method for time domain dynamic structure-foundation interaction analysis based on scaled boundary finite element method |
| |
Authors: | Jianguo DU Gao LIN |
| |
Affiliation: | (1) The 3rd Engineer Scientific Research Institute of the Headquarters of the General Staff, Luoyang, 471023, China;(2) School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian, 116024, China |
| |
Abstract: | Based on the reduced set of base function in scaled boundary finite element method (SBFEM), an improved time domain numerical approach for the dynamic structure-foundation interaction analysis was proposed. With reasonable choice of the number of base functions, the degrees of freedom on the structure-foundation interface were reduced and the associated computation for the calculation of convolution integral was greatly reduced. The results of this proposed approach applied to the calculation of a gravity dam and an arch dam. The acceleration frequency response functions were calculated and the influences affected by different reduced set of base functions as well as full set were compared. It was found that a higher degree of reduced set of base functions resulted in a significant increase of computational efficiency but a little bit of loss in accuracy. When the reduced set was decreased by 60%, the efficiency may be increased to up to five times, while the loss of accuracy of peak value of response will be less than 4%. It may be concluded that the proposed approach is suitable for large-scale structure-foundation interaction analysis. __________ Translated from Shuili Xuebao, 2007, 38 (1): 8–14 [译自: 水利学报] |
| |
Keywords: | dynamic structure-foundation interaction scaled boundary finite element method (SBFEM) reduced set of base functions time-domain numerical method |
本文献已被 万方数据 SpringerLink 等数据库收录! |
|