Page 313 - Thomson, William Tyrrell-Theory of Vibration with Applications-Taylor _ Francis (2010)
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300 Vibration of Continuous Systems Chap. 9
0 n h m iT fn — Figure P9-39.
9-40 If the base of an N-story building is allowed to rotate against a resisting spring as
shown in Fig. P9-40, determine the boundary equations and the natural frequeneies.
Figure P9-40.
9-41 The natural frequeneies and normal modes presented for the lO-DOF system of
Example 6.10-1 were obtained from the eigenvalue-eigenveetor eomputer program.
Verify these numbers by the use of Eq. 9.7-9 for and = B sin /3n for the
amplitude.
