Theoretical Modelling and Effectiveness Study of Slotted Stand-Off Layer Damping Treatment for Rail Vibration and Noise Control

Table 1

Tests of the material and configuration.

Case	/mm	/mm	α	/mm	/mm	/mm	/mm	/mm	/mm	Damping layer material	Constraining layer material
1	8	100	4%	55	45	3	2	30	20	VER-IPN	Al-2A14
2	6	100	4%	55	45	3	2	30	20	VER-IPN	Al-2A14
3	6	100	4%	55	45	3	3	30	20	VER-IPN	Al-2A14
4	6	100	4%	55	45	3	3	20	20	VER-IPN	Al-2A14
5	6	100	4%	55	45	3	3	20	30	VER-IPN	Al-2A14
6	6	100	4%	55	45	2	3	20	30	VER-IPN	Al-2A14
7	6	100	4%	55	45	2	3	20	30	VER-IPN	Steel-3Cr13Mo