【摘要】 采用子空间迭代得到了特大型钢吊箱结构的各阶频率和振型,并采用特征波法分析了其按余弦规律变化的波浪荷载作用下的动力响应。结果表明:规则余弦波浪对结构动力响应的影响较小。建议在设计钢吊箱时,可以在静力分析的基础上适当乘以一个放大系数来考虑动力的影响。更多还原

【Abstract】 The subspace iteration method was adopted to obtain the frequencies and modes of steel suspending cofferdams.The dynamic response of such structure under cosine wave loads was obtained using the characteristic wave method.Results show that the regular cosine waves have little effect on the dynamic response of structure.Finally,it is suqgested that a dynamic magnification factor based on the static analysis should be adopted to consider the dynamic influence for the design of steel suspending cofferdams.更多还原