Dynamic Characteristics of Single-Layer Spherical Aluminum Alloy Reticulated Shell

Comparative analyses of dynamic characteristics between two aluminum alloy single-layer spherical shells, which have the same span, same rise-span ratios and same bars but different material characters of elasticity and visco-elasticity, are presented. Influences about material viscosity on vibration behaviors of single-layer spherical aluminum alloy reticulated shells are illustrated. The results show that: there are great differences between the resonance frequencies of two shells but the linear harmonic response properties are basically the same; the dynamic characteristics of these two shells are greatly different under harmonic loads or seismic loads, and the dynamics characteristics are greatly influenced by the viscous properties of the material itself.