【摘要】 采用有限元软件ANSYS系统地研究了单层鞍型网壳结构的自振特性,分析了不同屋面荷载、不同高跨比、不同跨度下单层鞍型网壳自振频率及振型的变化规律,并利用了线性谐响应分析的方法探讨了其对频域上不同频率激励荷载的敏感程度,得出对工程实际有建设性意义的结论。更多还原

【Abstract】 The free vibration characteristics of single-layer saddle-shaped reticulated shells are analyzed taking into account the influence of many kinds of factors such as the span, the rise-span ratio, the roof surface load and so on by FEM. program ANSYS. Then, different sensitivity of such structures to various impulses in frequency domain is studied by applying harmonic loads. The outcome is useful for the anti-seismic structural design to structural engineers.更多还原