For form - finding of membrane structures , the common methods mainly indued three theory : nonliner fem , dynamic relaxation method and force density method 對于索膜找形分析,目前普遍常用的是非線形有限元法、動力松弛法和力密度法。
We will introduce nonlinear initial method , stress density method and dynamic relaxation method which are the most popular methods in our country 該文介紹的非線性有限元分析方法,力密度法以及動力松弛法都是國內(nèi)外較為常用的張拉膜結(jié)構(gòu)設(shè)計方法。
In order to find the minimum surface of membrane structures , firstly the nonlinear finite element method is adopted to get approximate surface , then the dynamic relaxation method is used on the approximate surface to get an accuracy surface 本文將動力松弛法和非線性有限元法合為一體,提出了全新的綜合設(shè)計法。此種方法比非線性有限元格式的精度有所提高,收斂速度也比動力松弛格式快得多。