Abstract
In this paper, the photonic control of free-floating flexible parabolic shells usingphotostrictive actuators is investigated. The parabolic shell of revolution is considered to beone of the most difficult geometries among all shell and non-shell structures. Because ofthis, an approximate way to estimate the dynamic behavior and light-induced control forcesfor a photostrictive coupled parabolic shell is presented. On the basis of the approximatespherical model, the effects of actuator locations as well as membrane and bendingcomponents on the control action are analyzed. The analysis results presented show thatthe control forces are location dependent. It is also shown that the membrane controlaction is much more significant than the bending control action. The validation ofthe approximate model is done by comparing the light-induced control forcesof the photostrictive coupled shells obtained using the approximate equivalentspherical shell model and those obtained using the parabolic shell model. From thecomparison, it can be concluded that there is only a slight difference between a sphericalshell and a parabola for a surface with a focal length to diameter ratio of 1.00 orlarger.
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