전단 및 단면 회전관성효과를 고려한 회전 외팔보의 면외 굽힘진동해석

Shin, Sang-Ha;Yoo, Hong-Hui

  • 발행 : 1997.10.01


A modeling method for the flapwise bending vibration of a rotating cantilever beam which has small slenderness ratio is presented in this paper. It is shown that as the slenderness ratio decreases the shear and rotary inertia effects increase. Such effects become critical for the accurate estimation of the natural frequencies and modeshapes, especially higher frequencies and modes, as the angular speed increases. It is also shown that the flapwise bending natural frequencies are higher than the chordwise bending natural frequencies. The discrepancy between first natural frequencies are especially significant when the hub radius ratio is small.


회전 외팔보;고유진동수 변화;전단효과;단면 회전관성효과;세장비;면외 굽힘진동;면내 굽힘진동


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