HIGH-ORDER LUMPED-PARAMETER MODEL FOR FOUNDATION BASED ON CONTINUED FRACTION

摘要：

A new high-order lumped-parameter model (LPM) for foundation vibrations is proposed in this paper. Instead of partial fraction expansion used widely, the continued-fraction expansion is applied as a mathematical tool to construct the new LPM, so that its parameters can be obtained by only real-number operations and its configuration is independent of problem analyzed. The new LPM has a condensed physical configuration with few parameters as possible and is easily extended to higher order. Moreover, due to the LPM with mass on each internal degree of freedom, the resulting structure-foundation-soil system can be solved by an explicit time-integration method. The effectiveness of new LPM is verified by analyzing the benchmark problem of semi-infinite rod on elastic foundation.

关键词： foundation vibration lumped-parameter model continued fraction explicit time integration

作者: Mi Zhao Xiuli Du

作者单位: The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education,Beijing University of Technology, Beijing, China

会议类型: 国际会议

会议名称: 14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)

会议地点: 北京

会议语种:英文

在线出版日期: 2008-10-12（万方平台首次上网日期，不代表论文的发表时间）