Underwater online dynamic strain test of CFRP propeller with embedded FBG sensors

Table 1. Main parameters of CFRP propeller
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Table 1. Main parameters of CFRP propeller
名称数值
桨直径/ mm 240
桨叶数 /片 5
毂径比 0.175
盘面比 0.8
桨叶侧斜角/(°) 24.50
桨叶总纵倾角/(°) 8

Table 2. Frequency and amplitude of strain with different speeds

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Table 2. Frequency and amplitude of strain with different speeds

r/(r·min⁻¹)	APF/Hz	应变特征频率/Hz			应变峰值/10⁻⁶
r/(r·min⁻¹)	APF/Hz	FBG2-1	FBG2-2	FBG2-3	FBG2-1	FBG2-2	FBG2-3
50	0.833	1.636	1.636	1.636	9.450	17.170	7.011
100	1.667	3.339	3.339	3.339	9.121	16.046	6.564
150	2.500	4.968	4.968	4.968	10.096	17.974	7.205
200	3.333	6.645	6.645	6.645	9.063	15.140	6.557
250	4.167	8.333	8.333	8.333	8.823	14.213	6.367
300	5.000	10.05	10.05	10.05	10.196	17.080	7.962
350	5.833	11.66	11.66	11.66	10.084	17.067	7.833
400	6.667	13.33	13.33	13.33	7.206	14.018	7.104

Table 3. Frequencies and amplitude of strain with different velocities

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Table 3. Frequencies and amplitude of strain with different velocities

v/（m·s⁻¹）	应变特征频率/Hz			应变峰值/10⁻⁶
v/（m·s⁻¹）	FBG2-1	FBG2-2	FBG2-3	FBG2-1	FBG2-2	FBG2-3
0.0	14.2	14.2	14.2	7.124	12.93	6.734
0.2	14.2	14.2	14.2	8.513	12.52	6.822
0.4	14.2	14.2	14.2	8.485	13.50	6.736
0.6	14.2	14.2	14.2	8.218	12.66	6.669
0.8	14.2	14.2	14.2	7.856	13.74	6.811
1.0	14.2	14.2	14.2	7.794	13.06	6.595
1.2	14.2	14.2	14.2	8.752	13.14	6.585
1.4	14.2	14.2	14.2	8.56	13.17	6.760
1.6	14.2	14.2	14.2	7.841	12.05	6.835

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Zhiyang LEI, Chunxu WANG, Chongjian WU, Guoping DING, Xiaoyu YAN. Underwater online dynamic strain test of CFRP propeller with embedded FBG sensors[J]. Chinese Journal of Ship Research, 2022, 17(2): 183

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