The effect of thermal loadings on the dynamic behavior of cylindrical – conical intersection shell

Abstract EN

This paper presented a numerical methods based on FEM were used to study the effect of temperature on the dynamic characteristic of composite cylindrical conical shell with different cone angle and wall thickness.

The study taken into account the effect of temperature on the material properties of the selected material and the effect of pre stressing on the natural frequency of the shell.

A general conclusions could be obtained from the static analysis, i.

e.

for higher circumferential wave number, the effect of increasing the thickness is to produce higher natural frequencies.

The natural frequency of the system may drops by about (12 %) as a result of the degeneration of the material properties due to temperature elevation.

The higher circumferential wave number, the more pronounced is the influence of ply orientation on the resulting natural frequency changing the ply orientation for 0 / 90 / 0 to 75 /-75 / 75 may increase the natural frequency by about (100 %).

Finally the transient dynamic stresses may exceeds the design stress by a bout (50 %).