【摘要】 本文阐述结构动力稳定性的基本概念，动力稳定研究方法。通过非线性有限元分析空间架单元节点大位移、大转角产生的几何非线性，采用Ｍｉｓｅｓ屈服准则和Ｐｒａｎｄｔｌ－Ｒｅｕｓｓ流动法则模拟材料弹塑性本构关系。讨论网壳结构动力失稳机理。通过大型工程实例分析，验证本文的理论和所编制程序的正确性。更多还原

【Abstract】 The dynamic stability of a single layer reticulated dome is studied in the paper. Then, a mechanism of the dynamic instability of a structure is proposed. A non-linear three dimensional beam finite element is used for the non-linear analysis. Combining a geometric non-linearity with a material non-linearity, then extended to the time-history analyses is accomplished in this study. The large displacements and large rotations are at same time analyzed in a geometrically non-linear analysis. In the material non-linear analysis, we adopt the Misses yield criterion and Prandtl-Reuss flow rule. The dynamic stability of a real structure is examined to verify the correctness of the developed program.更多还原