Experimental and Numerical Analysis of Triply Coupled Vibration of Thin-Walled Beam with Arbitrary Closed Cross-Section

In this paper, a numerical experimental study about coupled vibration and natural frequency of thin-walled beams with an arbitrary closed cross-section is presented. A new beam dynamic transfer matrix method, named TDTMM, presented in the domain for beam, which expands advantages general method (GDTMM). The theory takes into account influence warping effect, that is, both bimoment B rate twist ϕ(x) are considered, TDTMM derived by solving governing differential equations motion bending torsional beam. Finally, two examples one example given compared GDTMM finite element (FEM) results to validate developed theory.