Experiments on the geometrically nonlinear vibration of a thin-walled cylindrical shell with points supported boundary condition

摘要

A in depth experimental investigation of the nonlinear vibration of a thin-walled cylindrical shell with points-supported condition is presented in this paper. Firstly the point-supported thin-walled cylindrical shell structure is designed, in which bolts are used to restrain the cylindrical shell, and the nonlinear response test system for the cylindrical shell is built. Then, the error analysis of each degree of freedom during system alignment is given. The sensitivity indexes are used to guide the system alignment, and the Response Surface Method is used to identify the stiffness of the bolt. The comparisons of natural characteristics of points supported shell by experiment are conducted with the results by theory. Finally, the effects of supported stiffness and number of point on the nonlinear response of the points-supported thin-walled cylindrical shell are investigated. (C) 2020 Elsevier Ltd. All rights reserved.