Journal of Vibration and Control, Год журнала: 2025, Номер unknown

Опубликована: Июнь 6, 2025

This research explores the free vibration of asymmetrically stepped cylindrical shells using three-dimensional (3D) elasticity theory. In many real-world structures, thickness is not uniform but exhibits sudden changes in cross-section that are symmetrical about midplane or includes attached components, such as flanges, leading to significant geometric discontinuities. These discontinuities become particularly influential thick asymmetric shells. study aims achieve realistic modeling these complex structures by carefully considering and coupling a series segments. The mass distribution along shell’s length tailored based on constant total fine-tune vibrational responses. two-directional generalized differential quadrature (2D-GDQ) method employed accurately enforce boundary matching conditions at interfaces adjacent multi-domain structures. practical applications, steps frequently asymmetric. Consequently, proposed approach enables precise with non-aligned mid-surfaces without resorting simplifications. theoretical results validated through experimental modal testing, finite element (FEM) those previously published literature. Subsequently, examines effects key parameters, including condition, step location, configurations (external, internal, dual), symmetrical/asymmetrical thickness, distribution.

Язык: Английский