1. Nonzero free-free frequencies of structures idealized by matrix methods
2. Meirovitch, L., Analytical Methods in Vibrations, Macmillan, New York, 1967, pp.112-115, 263-270.
3. /i / ,2\-v _ /T _ TP DN\-llr-lY*>"i i -t-v-i"D\-w (C\\ I I/CO /AI - IJL - A.19JA.J ivil llllii j IU12.K.J.2L.1V^v Equation (9) is of the standard form presented in Ref. 2. It can be further simplified if the mass matrix is diagonal (mi 2 = 0 and m2i = 0) so that
4. Nonzero free-free frequencies of structures idealized by matrix methods
5. Przemieniecki, J. S., Theory of Matrix Structural Analysis, 1st ed.McGraw-Hill, New York, 1968, pp.137-147, 310-320.