一种球面网壳动力失效的联合预测方法

发布时间：2018-04-13 02:07

  本文选题：联合预测方法 + 单层球面网壳　； 参考：《振动与冲击》2017年06期

【摘要】：以地震作用下精细化有限元分析的单层球面网壳的动力失稳破坏模式为基础、结合细胞自动机(CA)方法,发展了一套单层网壳动力失稳破坏模式和失效荷载的联合预测方法。首先,对基础单层球面网壳进行了简谐荷载作用下全荷载域动力时程有限元分析(FEA),并时时提取各级动荷载幅值下所有节点的位移值及单元的应变能密度。之后,用建立的联合方法预测了其它同类网壳的动力失稳破坏模式及失效荷载,并与相应FEA计算结果进行了分析比较。结果表明,所提出的联合方法,在一定程度上能基于一个单层球面网壳的动力失稳破坏模式和失效荷载预测其它不同跨度、不同矢跨比、不同杆件截面尺寸的单层球面网壳的动力失稳破坏模式及失效荷载。因此,结合FEA数值模拟,实现了CA方法在单层球面网壳动力失稳破坏模式和失效荷载预测中的应用。
[Abstract]:Based on the dynamic instability failure mode of single-layer spherical reticulated shell under seismic action and the cellular automata (CA) method, a set of combined prediction methods for dynamic instability failure mode and failure load of single-layer reticulated shell are developed.Firstly, the finite element analysis of the dynamic time history of the single-layer spherical reticulated shell under simple harmonic loading is carried out, and the displacement values of all nodes and the strain energy density of the element are extracted from all the dynamic load amplitudes from time to time.Then, the dynamic failure mode and failure load of other similar latticed shells are predicted by using the established joint method, and the results are analyzed and compared with the corresponding FEA calculation results.The results show that the proposed joint method can to some extent be based on the dynamic instability failure mode and failure load of a single-layer spherical reticulated shell to predict other different span and different rise-span ratio.Dynamic failure mode and failure load of single-layer spherical reticulated shell with different member size.Therefore, combined with FEA numerical simulation, the CA method is applied to predict the failure mode and failure load of single-layer spherical reticulated shell.
，

本文编号：1742436