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本文从实用角度用有限元法全面研究了地基中的波动问题 ,建立了地基波动的有限元分析模型 ;对用有限元法模拟实际地基瞬态波动的求解策略进行了探讨 ;利用ANSYS有限元分析软件对多种实际地基在瞬态激励下的地面振动进行了分析、计算 ,与实测数据进行对比 ,吻合较好。对屏障隔振前后地基土中的振动变化及锻锤车间屏障隔振前后柱基不均匀沉降进行了有限元计算。研究表明 :屏障隔振可使地面振动位移在特定区域减小 ,但同时也使地基中一定区域内的动应力和振动频率增加 ,可能引起厂房柱基不均匀沉降加重
In this paper, the problem of the fluctuation in the foundation is studied comprehensively by using the finite element method and the finite element analysis model of the foundation is established. The solution method of the simulation of the transient fluctuation of the actual foundation by using the finite element method is discussed. By using the ANSYS finite element analysis The software analyzes and calculates the ground vibrations of a variety of real foundations under transient excitation, which is in good agreement with the measured data. The change of vibration in the foundation soil before and after the barrier vibration isolation and the uneven settlement of the column foundation before and after the forging hammer shop are isolated are calculated by finite element method. The results show that the vibration isolation can reduce the ground vibration displacement in a specific area, but also increase the dynamic stress and vibration frequency in a certain area of the foundation, which may lead to the uneven settlement of the plant column.