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中文摘要：
单层柱面网壳精细化有限元模型虽有较好的模拟精度,但是由于其建模复杂而且计算费时,所以它难以应用到工程实际进行模拟分析.为了简化计算,对精细化模型的等效简化模型进行了研究.前期已经研究出一种等效模型的方便建模方法.为了研究PGA（地震动峰值加速度）对等效模型模拟精度的影响,建立了四组尺寸不同的单层柱面网壳模型,每组包括两类模型,即精细化壳单元模型和与之对应的等效简化模型.因结构参数不同,输入的地震动峰值加速度也不同.对四组模型进行动力失效分析,选用的加速度值接近结构失稳的临界值.模拟结果显示：随着失效临界加速度值的改变,各组简化模型的等效效果都较好.因此,等效简化模型的精度受地震动加速度的影响较小,可以忽略不计.
英文摘要：
The fine finite element model for single-layer cylindrical reticulated shell has better precision in simulation,but it is difficult to build a model and do the calculation when it is used in the simulation.Therefore,it is hard to apply it to the real project calculation.In order to maintain both simplification and precision in the finite element simulation,an equivalent model for the fine model is studied.Former studies have already investigated a new method which could build an effective equivalent model with good precision and cost only slightly more calculation time than the traditional model.In order to study the effect of peak ground acceleration（PGA）on the simulation precision,4groups of models,in different sizes,are built.Each group contains two types models：the fine models and their equivalent models.Then dynamic failure analysis is put forward.The acceleration value that is close to the critical value of structure at the point of instability is chosen.The critical acceleration value for each group is different as the structural parameter is different.The simulation result shows that the changing peak ground acceleration has little effect onsimulation precision of the equivalent model.Therefore,the precision of the equivalent model is insensitive to PGA changing.
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