VIBRATION AND DYNAMIC-RESPONSE CONTROL OF CANTILEVERS CARRYING EXTERNALLY MOUNTED STORES

The vibrational and dynamic response control of cantilevers carrying e xternally mounted stores is investigated, The cantilevered structure i s modeled as a thin-walled beam of arbitrary cross section and incorpo rates a number of nonclassical effects such as transverse shear, secon dary warping, anisotropy of constituent materials, and heterogeneity o f the construction. The control is carried out via a dynamic bending m oment applied al the rip of the structure. A feedback control law rela ting the boundary moment with one of the kinematical variables charact erizing the response of the beam is implemented, and its results upon the closed-loop eigenfrequencies and dynamic response are highlighted. The obtained numerical results emphasize the efficiency of this contr ol methodology to enhance, without weight penalties, vibrational and d ynamic response behavior and inhibit and even suppress the occurrence of the resonance phenomenon. (C) 1997 Acoustical Society of American. [S0001-4966(97)01712-8].