Structural Improvement of the ω-Type High-Speed Rail Clip Based on a Study of Its Failure Mechanism

Table 4

Experimental frequency and mode shape of the rail clip.

Mode	Bolt torque (N·m)	Experimental modal	Clip frequency (Hz)	Error (%)
First order	100∼300		Test: 155∼172; FEA: 160∼182	5.5
Second order	100∼300		Test: 294; FEA: 286	2.8
Third order	100∼300		Test: 530∼622; FEA: 520∼636	2.2
Fourth order	100∼300		Test: 695∼718; FEA: 680∼702	2.3
Fifth order	100∼300		Test: 945; FEA: 934	1.2