【作者】 邵剑文； 张凯； 陈赟； 肖志斌；

【Author】 SHAO Jian-wen;ZHANG Kai;CHEN Yun;XIAO Zhi-bin;Architectural Design and Research Institute of Zhejiang University;

【机构】 浙江大学建筑设计研究院有限公司；

【摘要】 在动态土工离心机分析中,对离心机基础的振动控制对模型试验的准确性有重要影响。本文中进行了一系列的分析,研究了某离心机基础的振动特性。首先,针对某土工离心机桩基及结构,通过ABAQUS有限元分析软件,采用无限元边界耦合有限元方法建立了能够考虑结构-桩-土共同作用的三维有限元模型,在该模型中通过时程分析,得到了基础在不同激励频率下水平向稳态加速度及位移响应。之后根据动态离心机模型测试试验结果,处理后得到不同输入简谐激励作用下离心机基础的频率幅值响应。将计算结果与试验结果进行对比分析后,结果表明,文中采用的整体计算方法,能够保证简谐激励系统基础频谱分析计算达到令人满意的精度,验证了该方法的合理性与正确性。更多还原

【Abstract】 In the dynamic geotechnical centrifugal machine analysis,the vibration control of the centrifugal foundation has an important influence on the accuracy of the model test.In this paper,a series of analysis was performed and the vibration characteristics of a certain centrifuge foundation are studied.Firstly,for the pile foundation and structure of the geo-centrifuge,through the ABAQUS finite-element analysis software,a three-dimensional finite element model is established using the infinite element boundary coupling finite element method that can consider the pile-soil-structure interaction.With time-history analysis in this model,the steady acceleration and displacement response of the foundation at different excitation frequencies are obtained.According to the test results of the dynamic centrifuge model,the frequency amplitude response of the centrifuge foundation under different input harmonic excitation was obtained.After comparing the calculation results with the test results,the calculation method adopted can ensure the satisfactory accuracy of the simple harmonic excitation system and verify the rationality and correctness of the method.更多还原