Concept Modelling of Vehicle Joints and Beam-Like Structures through Dynamic FE-Based Methods

Table 3

Dynamic comparison between the original and the two-concept FE models, in terms of natural frequencies, % errors, and modal correlation factors.

	Mode n.	Frequency 3D model (Hz)	Concept model with RBE2			Concept model with new MPC
			Frequency 1D model (Hz)	Frequency difference (%) 3D − 1D	MAC values	Freq. 1D model (Hz)	Frequency difference (%) 3D − 1D	MAC values
	1	41,63	41,85	0,53%	0,99	40,40	−2,97%	0,99
	2	55,46	55,55	0,17%	0,99	54,86	−1,09%	0,99
	3	79,23	79,44	0,26%	0,99	78,77	−0,59%	0,99
1st Flex-Tors	4	188,52	229,57	21,77%	0,96	179,99	−4,53%	0,99
2nd Flex-Tors	5	196,49	225,76	14,90%	0,90	190,38	−3,11%	0,96
	6	197,18	197,55	0,19%	0,97	194,60	−1,31%	0,98
	7	256,67	256,90	0,09%	0,97	256,01	−0,26%	0,99
3rd Flex-Tors	8	266,65	396,93	38,73%	0,86	260,47	−2,32%	0,98
4th Flex-Tors	9	285,98	364,37	27,41%	0,62	280,23	−2,01%	0,90
	10	293,74	292,37	−0,47%	0,95	289,72	−1,37%	0,97
	11	382,43	397,78	4,01%	0,93	391,22	2,30%	0,84
	12	410,85	417,10	1,52%	0,99	406,66	−1,02%	0,99
Average				9,09%			1,91%
Maximum				38,73%			4,53%