【摘要】 基于循环对称特性建立了ITER环向场(TF)线圈及重力支撑结构系统的整体力学模型,通过有限元数值模拟计算了结构的前10阶固有频率和模态振型,进而利用谱分析方法得到了结构在已知地震谱条件下的位移响应分布。通过与已有单自由度简化模型的理论计算结果相对比,验证了计算模型和结果的有效性。更多还原

【Abstract】 A finite element model of the toroida field(TF) coil and gravity support system is established at first by taking its cyclic symmetry condition into account.The first ten order natural frequencies and their corresponding modal vectors of the system are calculated then by using the ANSYS software.Based on these modal information and the spectrum analysis method,the displacement response distribution of the TF system is obtained finally by using the standard seismic spectrum given in ITER EDA report.Furthermore,the feasibility of the numerical model is validated by comparing its results with those of a simplified model of single degree of freedom.更多还原