排序方式: 共有11条查询结果,搜索用时 15 毫秒
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介绍中东某抽水蓄能电站工程下水库土石坝全库盆土工膜防渗锚固设计.对锚固槽锚固计算过程进行归纳总结,给出相关参数取值参考,为类似工程的土工膜锚固设计提供借鉴. 相似文献
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介绍了一种可以考虑剪胀效应、中主应力影响以及强度非线性的粗粒料非线性模型(hhu-KG模型)。在次弹性理论的基础上将其扩展为一般应力空间中的应力应变关系,并基于土石坝静动力流固耦合可视化分析软件平台开发了该模型的有限元计算程序。采用该模型和邓肯E-B模型对某面板堆石坝进行了三维有限元数值模拟,并对两种模型的模拟结果进行了对比分析。结果显示,相较于邓肯E-B模型,hhu-KG模型计算所得到的最大沉降值与最大面板挠度值略小,而最大顺河向位移值略大,但是两种模型计算所得的坝体与面板变形分布规律大致相同,且符合工程的一般规律,验证了基于次弹性理论推导的刚度系数矩阵的合理性,同时也说明了hhu-KG模型在土石坝静力有限元分析中的适用性。研究成果为粗颗粒土在土石坝的应用提供参考。 相似文献
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Experimental study of the interaction between the spark-induced cavitation bubble and the air bubble 总被引:1,自引:0,他引:1
Experiments are carried out by using high-speed photography to investigate the interaction between the spark-generated cavitation bubble and the air bubble in its surrounding fluid. Three problems are discussed in detail: the impact of the air bubble upon the development of the cavitation bubble, the evolution of the air bubble under the influence of the cavitation bubble, and the change of the fluid pressure during the development of a micro jet of the cavitation bubble. Based on the experimental results, under the condition of no air bubble present, the lifetime of the cavitation bubble from expansion to contraction increases with the increase of the maximum radius. On the other hand, when there is an air bubble present, different sized cavitation bubbles have similarity with one another generally in terms of the lifetime from expansion to contraction, which does not depend on the maximum radius. Also, with the presence of an air bubble, the lifetime of the smaller cavitation bubble is extended while that of the bigger ones reduced. Furthermore, it is shown in the experiment that the low pressure formed in the opposite direction to the cavitation bubble micro jet makes the air bubble in the low pressure area being stretched into a steplike shape. 相似文献
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