Research Article

Differential Equations of Motion for Naturally Curved and Twisted Composite Space Beams

Table 2

The first five frequencies of Beam 2 (made of unidirectional composite material).

Mode number (Hz)FEMPresent study (PS)
Warping ignoredErrors (%)Warping includedErrors (%)

1351.54512.8045.87358.211.89
2675.19981.3245.34687.631.84
3787.861117.8741.89805.742.27
4880.951200.0936.23903.082.51
5940.961357.2244.24958.561.87