在估计实际品质因子Q值时,因受频段选择、子波叠加、噪声干扰、非本征衰减等因素影响,容易导致Q值估计误差偏大。为此,提出基于不同阶次泰勒级数展开的含非本征衰减频域振幅比平均的Q值估计方法(Am-plitude ratio average in frequency ...在估计实际品质因子Q值时,因受频段选择、子波叠加、噪声干扰、非本征衰减等因素影响,容易导致Q值估计误差偏大。为此,提出基于不同阶次泰勒级数展开的含非本征衰减频域振幅比平均的Q值估计方法(Am-plitude ratio average in frequency domain,FARA法)。该算法首先利用参考频段内振幅比的连乘消除非本征衰减的影响;然后基于振幅因子在参考频点处的1~4阶泰勒级数展开表达式,推导适用于含非本征衰减地震记录的单频点Q值计算公式;其次,采用高、低频双参考频段结合方式削弱参考频段的影响;最后,采用主值频段内所有频点的平均化处理提高算法的稳定性。模型试验表明,采用高、低参考频段结合的模式可以显著提高所提方法的Q值估计精度,相对于对数谱面积双差值(LSADD)法,新方法受时差、时窗及噪声等因素的影响更小。实例应用表明,不同阶次的FARA法Q估计值的一致性较好,且整体大于LSADD法的Q估计值,与模型试验结果吻合,表明由新方法获得的Q值更可靠。展开更多
China has planned to develop independently the ITER TBM modules for testing during ITER operation period. Although different concepts for ITER TBMs have been proposed by other parties. However, the He-cooled solid bre...China has planned to develop independently the ITER TBM modules for testing during ITER operation period. Although different concepts for ITER TBMs have been proposed by other parties. However, the He-cooled solid breeder blanket （HCSB） with ferritic /martensitic steel （FMs） is still main stream for the fusion DEMO blanket design and has foundation of the world R＆D database. Therefore, a helium-cooled solid pebble bed concept has been adopted, as one of options, in Chinese TBM modules design. Under the cooperation of domestic institutes, the preliminary design and performances analysis as well as a draft design description document （DDD） based on the definition and the strategy of DEMO fusion reactor in China have been carried out recently.展开更多
文摘在估计实际品质因子Q值时,因受频段选择、子波叠加、噪声干扰、非本征衰减等因素影响,容易导致Q值估计误差偏大。为此,提出基于不同阶次泰勒级数展开的含非本征衰减频域振幅比平均的Q值估计方法(Am-plitude ratio average in frequency domain,FARA法)。该算法首先利用参考频段内振幅比的连乘消除非本征衰减的影响;然后基于振幅因子在参考频点处的1~4阶泰勒级数展开表达式,推导适用于含非本征衰减地震记录的单频点Q值计算公式;其次,采用高、低频双参考频段结合方式削弱参考频段的影响;最后,采用主值频段内所有频点的平均化处理提高算法的稳定性。模型试验表明,采用高、低参考频段结合的模式可以显著提高所提方法的Q值估计精度,相对于对数谱面积双差值(LSADD)法,新方法受时差、时窗及噪声等因素的影响更小。实例应用表明,不同阶次的FARA法Q估计值的一致性较好,且整体大于LSADD法的Q估计值,与模型试验结果吻合,表明由新方法获得的Q值更可靠。
文摘China has planned to develop independently the ITER TBM modules for testing during ITER operation period. Although different concepts for ITER TBMs have been proposed by other parties. However, the He-cooled solid breeder blanket （HCSB） with ferritic /martensitic steel （FMs） is still main stream for the fusion DEMO blanket design and has foundation of the world R＆D database. Therefore, a helium-cooled solid pebble bed concept has been adopted, as one of options, in Chinese TBM modules design. Under the cooperation of domestic institutes, the preliminary design and performances analysis as well as a draft design description document （DDD） based on the definition and the strategy of DEMO fusion reactor in China have been carried out recently.
