Numerical Study on Propagative Waves in a Periodically Supported Rail Using Periodic Structure Theory

Table 2

The bounding frequencies of stop bands.

		Stop band
		1st	2nd	3rd	4th	5th	6th
Bounding frequencies width (Hz)	A	445.2–459.7	1424.5–1430.2	2746.9–2750.5	4005.2–4005.4	4991.4–4996.1	5975.7–5981.1
		14.5	5.7	3.6	0.2	4.7	5.4
	B	962.5–1001.5	2584.2–2597.5	4027.9–4034.9	5006.45–5006.48	5717.2–5721.2
		39.0	13.3	7	0.03	4
	C	763.0–827.7	2157.6–2183	3438.5–3449.7	4755.1–4755.3
		64.7	25.4	11.2	0.2
	D	1815.1–1855.3	2725–2741.6	4287.2–4288.8
		40.2	16.6	1.6
	E	3982.7–3985.1	5601.2–5617.3
		2.4	16.1
	F	4371.1–4379	5295.1–5298.1
		7.9	3
	G	5457.8–5480.4
		22.6
Wavenumber (rad/m)		π/d = 4.833	2π/d = 9.666	3π/d = 14.500	4π/d = 19.333	5π/d = 24.166	6π/d = 28.999
Wavelength (m)		(2/1) d = 1.3	(2/2) d = 0.65	(2/3) d = 0.433	(2/4) d = 0.325	(2/5) d = 0.26	(2/6) d = 0.217