| High Precise Internal Friction Calculation for Force Vibration Mode |
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| 作者姓名： | 梁李敏 费广涛 水嘉鹏 崔平 吴兵 陈晓明 刘克涛 |
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| 作者单位： | KeyLaboratoryofMaterialsPhysics,InstituteofSolidStatePhysics,HefeiInstitutesofPhysicalScience,ChineseAcademyofSciences,POBox1129,Hefei230031 |
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| 摘 要： | For the necessity of measuring the small phase difference of internal friction, a detailed comparison is carried out among the fast Fourier transformation (FFT), correlation function and three-parameter sine wave curve-fit methods. The comparison shows that the three-parameter sine wave curve-fit method can obtain more precise phase angle difference than correlation methods. Compared with the FFT algorithm, the three-parameter sine wave curve-fit method can obtain more precise frequency values.
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| 关 键 词： | 振动模型 摩擦力 Fourier转换 相关函数 参数设置 |
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