Paper number 491

FREE VIBRATION ANALYSIS OF CLAMPED-FREE COMPOSITE CYLINDRICAL SHELLS WITH AN INTERIOR RECTANGULAR PLATE

Young-Shin Lee¹ and Myoung-Hwan Choi¹

1Department of Mechanical Design Engineering, Chungnam National University,
220 Kung-Dong, Yusong-Gu, Taejon, 305-764, Korea

Summary

This paper describes the free vibration characteristics of clamped-free composite cylindrical shells with a longitudinal interior rectangular plate using the receptance method. To formulate the frequency equation of the combined shell, the natural frequencies and mode shape functions for individual components of the plate and shell with clamped-free boundary conditions at both ends of the shell are obtained using Love's shell theory and classical plate theory. The natural frequencies of combined shells can be calculated from the characteristics of the plate and shell two component systems. These calculations are needed for component systems under dynamic force and moment exerted at the joints. The analytical results are compared with those of the experiment and finite element analysis. The effects of the thickness of the interior plate and the fiber orientation angles on the natural frequencies of the combined composite shells are also discussed.

Keywords

receptance method, cylindrical shell, free vibration, natural frequency, Ddynamic loading.