Refined Vehicle-Bridge Interaction Analysis Using Incompatible Solid Finite Element for Evaluating Stresses and Impact Factors

Table 3

Computed and measured natural frequencies (unit: Hz).

Modes	Measured	FE model	Case 1	Case 2	Case 3	Case 4
1^st vertical bending	4.81	Solid	4.61	7.79	10.33	10.33
		Grillage	4.53	4.53
1^st torsion	7.14	Solid	6.77	7.92	10.90	10.90
		Grillage	6.71	6.71
2^nd vertical bending	16.03	Solid	14.89	15.81	27.89	27.89
		Grillage	14.93	14.93