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

Table 1

Waveband data of wavelet decomposition.

Loading stress (MPa)	Waveband data (μs)
	A	B	C	D	E
0	63∼522	143∼584	209∼751	301∼843	364∼906
2.76	82∼405	133∼499	196∼581	260∼684	308∼765
5.52	76∼311	118∼386	187∼470	269∼533	298∼619
8.28	63∼260	122∼327	178∼400	249∼470	298∼532
11.04	70∼457	123∼504	181∼569	237∼642	293∼685
13.80	66∼422	118∼489	172∼554	222∼613	268∼678
16.56	61∼415	120∼484	175∼541	227∼602	290∼667
19.32	61∼425	119∼478	176∼541	230∼597	281∼649
22.08	61∼417	116∼479	166∼534	230∼592	282∼652
24.84	56∼407	118∼474	165∼523	218∼590	280∼639
27.60	50∼408	110∼484	161∼524	214∼585	275∼645
30.36	57∼400	113∼477	165∼514	217∼589	290∼633
33.12	57∼400	113∼477	165∼514	217∼589	290∼627