A Timoshenko finite element model is employed to investigate the mean square response of a thick rotating blade with external and internal damping under stationary or nonstationary random excitation. The finite element model satisfies all the geometric and natural boundary conditions of the blade. The blade is considered to be subjected to white noise, band-limited white noise or filtered white noise excitation. The effects of rotational speed, external and internal damping, rotary inertia parameter, acoustic velocity, shear coefficient, natural frequency of base, stagger angle and excitation spectrum level on the mean square response are studied. Numerical results indicate that the present Timoshenko model is used to solve random response of the thick rotating blade. For the nonstationary excitation, it is also shown that the rotational speed yields effect on the time of approaching the stationary response.
|Number of pages||11|
|Journal||Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers, Series C/Chung-Kuo Chi Hsueh Kung Ch'eng Hsuebo Pao|
|Publication status||Published - 2002 Dec 1|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering