DYNAMIC-RESPONSE OF ANISOTROPIC THIN-WALLED-BEAMS TO BLAST AND HARMONICALLY OSCILLATING LOADS

The dynamic response of anisotropic thin-walled beams to blast and har monically time-dependent loads is investigated. The structural model i ncorporates transverse shear, and warping restraint and includes the a nisotropy of the constituent materials. As a result of the beneficial implications played by the bending-twist elastic coupling, the circumf erentially asymmetric stiffness configuration, inducing such a couplin g is adopted and the pertinent system of governing equations is used t o study the dynamic response. Efficient solution methodologies able to predict the response to arbitrary and harmonic time-dependent excitat ions are used and some of the implications played by the anisotropy of beam material, transverse shear and secondary warping are outlined. ( C) 1998 Elsevier Science Ltd. All rights reserved.