Isogeometric configuration design optimization of three-dimensional curved beam structures for maximal fundamental frequency

This paper presents an isogeometric configuration design optimization of curved beam structures for maximizing fundamental eigenfrequency. A shear-deformable model is used in the response analyses structural vibrations within framework using NURBS basis functions. An analytical sensitivity repeated eigenvalues used. special attention paid to computation velocity field and optimal constrained on a surface, where both designs embedded beams surface are simultaneously varied during process. The developed method demonstrated through several illustrative examples.