Flight Loads Prediction of High Aspect Ratio Wing Aircraft Using Multibody Dynamics

Table 3

Comparison of the first five natural frequencies of the free-free RHS wing.

Mode description	3D FEM	Method A		Method B		Method C
	Frequency [Hz]	Frequency [Hz]	Error [%]	Frequency [Hz]	Error [%]	Frequency [Hz]	Error [%]
1st bending	2.421	2.363	−2.40%	2.412	−0.37%	2.405	−0.66%
2nd bending	5.593	5.405	−3.36%	5.553	−0.72%	5.527	−1.18%
1st in-plane bending	7.694	7.417	−3.60%	7.628	−0.86%	7.599	−1.23%
3rd bending	10.204	9.779	−4.17%	10.109	−0.93%	10.064	−1.37%
1st torsion	15.350	13.062	−14.91%	14.536	−5.30%	13.609	−11.34%