

China Mechanical Engineering ›› 2026, Vol. 37 ›› Issue (8): 2009-2016.DOI: 10.3969/j.issn.1004-132X.2026.08.020
LIU Tao(
), LI Ding, WU Zaixin, ZHANG Shuo, MA Zhuang
Received:2025-08-06
Online:2026-08-25
Published:2026-09-17
Contact:
LIU Tao
通讯作者:
刘涛
基金资助:CLC Number:
LIU Tao, LI Ding, WU Zaixin, ZHANG Shuo, MA Zhuang. Analysis of Surface Topography of Scroll Based on Wavelet Transform and Multifractal Theory[J]. China Mechanical Engineering, 2026, 37(8): 2009-2016.
刘涛, 李鼎, 邬再新, 张烁, 马壮. 融合小波变换与多重分形理论的涡旋盘表面形貌分析[J]. 中国机械工程, 2026, 37(8): 2009-2016.
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URL: https://www.cmemo.org.cn/EN/10.3969/j.issn.1004-132X.2026.08.020
| 小波基函数 | 重构误差 | 小波基函数 | 重构误差 |
|---|---|---|---|
| Sym2 | 11.44×10 | Bior2.4 | 2.48×10 |
| Sym3 | 65.86×10 | Bior2.6 | 2.66×10 |
| Sym4 | 4.29×10 | Bior2.8 | 3.73×10 |
| Sym5 | 1.47×10 | Bior3.1 | 4.61×10 |
| Sym6 | 7.24×10 | Bior3.3 | 3.55×10 |
| Sym7 | 5.11×10-12 | Bior3.5 | 3.55×10 |
| Sym8 | 2.51×10 | Bior3.7 | 3.37×10 |
| Bior1.3 | 3.90×10 | Bior3.9 | 3.90×10 |
| Bior1.5 | 3.73×10 | Bior4.4 | 49.5×10 |
| Bior2.2 | 4.08×10 | Bior5.5 | 15.3×10 |
Tab.1 Reconstruction errors of different wavelet basis functions
| 小波基函数 | 重构误差 | 小波基函数 | 重构误差 |
|---|---|---|---|
| Sym2 | 11.44×10 | Bior2.4 | 2.48×10 |
| Sym3 | 65.86×10 | Bior2.6 | 2.66×10 |
| Sym4 | 4.29×10 | Bior2.8 | 3.73×10 |
| Sym5 | 1.47×10 | Bior3.1 | 4.61×10 |
| Sym6 | 7.24×10 | Bior3.3 | 3.55×10 |
| Sym7 | 5.11×10-12 | Bior3.5 | 3.55×10 |
| Sym8 | 2.51×10 | Bior3.7 | 3.37×10 |
| Bior1.3 | 3.90×10 | Bior3.9 | 3.90×10 |
| Bior1.5 | 3.73×10 | Bior4.4 | 49.5×10 |
| Bior2.2 | 4.08×10 | Bior5.5 | 15.3×10 |
| 分解尺度 | Edetails能量占比 | Ea能量占比 |
|---|---|---|
| 1 | 0.0026 | 99.909 |
| 2 | 0.0033 | |
| 3 | 0.0042 | |
| 4 | 0.0058 | |
| 5 | 0.0071 | |
| 6 | 0.0082 | |
| 7 | 0.0122 | |
| 8 | 0.0474 |
Tab.2 Energy proportion of the surface decomposition layer
| 分解尺度 | Edetails能量占比 | Ea能量占比 |
|---|---|---|
| 1 | 0.0026 | 99.909 |
| 2 | 0.0033 | |
| 3 | 0.0042 | |
| 4 | 0.0058 | |
| 5 | 0.0071 | |
| 6 | 0.0082 | |
| 7 | 0.0122 | |
| 8 | 0.0474 |
| 测试区域 | 算术平均高度Sa/μm | 均方根高度Sq/μm |
|---|---|---|
| G1 | 0.2407 | 0.3053 |
| G2 | 0.2290 | 0.2917 |
| G3 | 0.3132 | 0.4052 |
| G4 | 0.2055 | 0.2711 |
Tab.3 Measurement results of three-dimensional roughness parameters
| 测试区域 | 算术平均高度Sa/μm | 均方根高度Sq/μm |
|---|---|---|
| G1 | 0.2407 | 0.3053 |
| G2 | 0.2290 | 0.2917 |
| G3 | 0.3132 | 0.4052 |
| G4 | 0.2055 | 0.2711 |
| G1 | G2 | G3 | G4 | |
|---|---|---|---|---|
| Ds | 2.5346 | 2.5471 | 2.5018 | 2.5229 |
Tab.4 The fractal dimensions Ds of each test area
| G1 | G2 | G3 | G4 | |
|---|---|---|---|---|
| Ds | 2.5346 | 2.5471 | 2.5018 | 2.5229 |
| Ds | Sa | Sq | |
|---|---|---|---|
| 方差 | 0.000 29 | 0.006 47 | 0.010 66 |
| 标准差 | 0.016 68 | 0.080 43 | 0.103 23 |
Tab.5 The variances and standard deviations of Ds, Sa, and Sq
| Ds | Sa | Sq | |
|---|---|---|---|
| 方差 | 0.000 29 | 0.006 47 | 0.010 66 |
| 标准差 | 0.016 68 | 0.080 43 | 0.103 23 |
| 区域 | αmin | αmax | ∆α | f(αmin) | f(αmax) | ∆f |
|---|---|---|---|---|---|---|
| G1 | 1.932 | 2.395 | 0.462 | 1.521 | 1.850 | |
| G2 | 1.914 | 2.364 | 0.450 | 1.304 | 1.796 | |
| G3 | 1.900 | 2.704 | 0.804 | 1.136 | 1.960 | |
| G4 | 1.894 | 2.465 | 0.571 | 1.211 | 1.901 |
Tab.6 The multifractal spectrum parameter values on the surface of the scroll
| 区域 | αmin | αmax | ∆α | f(αmin) | f(αmax) | ∆f |
|---|---|---|---|---|---|---|
| G1 | 1.932 | 2.395 | 0.462 | 1.521 | 1.850 | |
| G2 | 1.914 | 2.364 | 0.450 | 1.304 | 1.796 | |
| G3 | 1.900 | 2.704 | 0.804 | 1.136 | 1.960 | |
| G4 | 1.894 | 2.465 | 0.571 | 1.211 | 1.901 |
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