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对具有相同跨度、相同矢跨比、相同杆件截面而分别具有弹性和粘弹性材料特性的两个单层球面铝合金网壳的线性谐响应特性以及在简谐荷载和地震荷载作用下的非线性振动特性进行了对比分析,考察了材料粘性对球壳振动特性的影响.研究结果表明:两类球壳线性谐响应特性的总体规律基本相似,但共振频率差别较大;无论在简谐荷载作用下还是在地震荷载作用下两类球壳的振动特性均有明显差异;材料本身的粘性对球壳的动力学行为有较大的影响,在高温、火灾、地震等特定环境下忽略材料的粘性会产生较大误差.
The linear harmonic response characteristics of two single-layer spherical aluminum alloy reticulated shells with the same span, the same ratio of pitch to span and the same cross-section of the rod with elastic and viscoelastic material properties, respectively, and the nonlinear harmonic response under the condition of simple harmonic load and seismic load The results show that the general laws of the linear harmonic response of the two kinds of spherical shells are basically similar, but the difference of the resonance frequency is quite large. No matter in simple harmonic load The vibration characteristics of the two kinds of spherical shells under the action of earthquake load are obviously different. The viscosity of the material itself has a great influence on the dynamic behavior of the spherical shell. Ignoring the material under the special environment of high temperature, fire and earthquake Sticky will have a greater error.