Investigating the Frequency Spectrum Characteristic of Stress Wave under Multistage Loading Stress

Table 4

Energy ration of frequency band.

Loading stress (MPa)	Frequency band (kHz)	Energy ratio (%)
		A	B	C	D	E
0	0∼36.62	91.05	89.7	87.91	86.41	86.71
	36.62∼73.24	2.29	4.18	4.5	4.96	3.47
	73.24∼109.86	1.31	1.58	1.81	2.16	1.99
	109.86∼183.48	1.34	0.80	0.76	1.22	1.29
	…	…	…	…	…	…
	439.45∼476.07	0.23	0.27	0.29	0.36	0.49
	476.07∼500.00	0.25	0.23	0.36	0.26	0.71
5.52	0∼36.62	92.94	92.89	87.88	81.1	80.77
	36.62∼73.24	1.50	1.91	3.52	7.09	5.96
	73.24∼109.86	1.05	0.71	2.15	4.18	3.04
	109.86∼146.48	1.14	0.54	1.28	1.47	1.93
	…	…	…	…	…	…
	439.45∼476.07	0.29	0.39	0.37	0.33	0.85
	476.07∼500.00	0.19	0.18	0.18	0.24	0.92
11.04	0∼36.62	86.15	83.79	84.53	80.88	80.21
	36.62∼73.24	3.03	5.41	3.69	6.06	5.42
	73.24∼109.86	1.91	2.30	1.44	2.63	2.70
	…	…	…	…	…	…
	439.45∼476.07	0.54	0.73	0.89	0.74	0.60
	476.07∼500.00	0.26	0.49	0.60	0.83	0.41
…	…	…	…	…	…	…
27.60	0∼36.62	81.15	79.09	84.25	78.32	75.74
	36.62∼73.24	4.46	5.08	3.29	7.23	6.15
	73.24∼109.86	3.34	3.56	2.24	3.58	4.51
	…	…	…	…	…	…
	439.45∼476.07	0.49	0.86	0.69	0.62	0.76
	476.07∼500.00	0.43	0.57	0.47	0.42	0.49
33.12	0∼36.62	85.23	84.25	79.09	73.65	73.99
	36.62∼73.24	3.21	3.45	6.26	9.84	9.63
	73.24∼109.86	2.14	2.86	3.37	5.23	4.29
	…	…	…	…	…	…
	439.45∼476.07	0.55	0.68	0.89	0.65	0.53
	476.07∼500.00	0.34	0.52	0.56	0.40	0.67