论文部分内容阅读
本文主要研究复合支护结构自振特性的计算方法及其变异性问题。对结构自振频率采用修正系数的方法进行分析，即先计算等厚度整体衬砌结构的自报频率，然后按照两次衬砌厚度比、衬砌之间和周围土体的约束刚度两个修正系数进行修正得到复合支护结构的自振频率。并对所得到频率的不确定性用中心点一次二阶矩法进行了分析，由各影响因素及计算方法本身的确定性得到了自振频率的变异系数。
This paper mainly studies the calculation method and variability of natural vibration characteristics of composite support structures. The method of applying the correction coefficient to the natural vibration frequency of the structure is analyzed. That is, the self-reporting frequency of the equal-thickness integral lining structure is calculated first, and then the two correction coefficients are corrected according to the ratio of the lining thickness ratio, the lining between the boundary and the surrounding soil. The natural vibration frequency of the composite support structure is obtained. The uncertainty of the obtained frequency is analyzed by the first-order second-order moment method of the center point. The coefficient of variation of the natural frequency is obtained from the determinism of each influencing factor and the calculation method itself.