鸟巢型索穹顶自振特性分析

Natural vibration analysis of bird-nest-pattern cable domes

在鸟巢型索穹顶结构静力计算的基础上,利用子空间迭代法,计算出结构的频率和相应振型,并结合跳格与非跳格两种鸟巢型索穹顶算例,对其振型与频率进行了分析比较.计算结果表明鸟巢型索穹顶结构具有良好的整体刚度,本文结果为该类结构的进一步动力性能分析提供了基础.

Based on the static calculations of the bird-nest-patterned cable dome, this article successfully figures out the frequency and the relevant mode shape on the advantage of subspace iteration method. Combined with the above results and two calculation patterns featured in patterns of both grid-jumping and none-grid-jumping, it tries to conduct a comparision and analysis in their mode shapes and frequencies. The results of the calculations clearly show that the bird-nest-patterned cable dome contains excellent integral stiffness, which provides a strong basis for the further dynamical analysis of this type of cable domes.