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The foundation of arch dam usually is layer rock base, and the depths of the layer are small, it is common that several layer rock base contact with one layer element grid. According to the geometry relation and the property of shape function, a new element kind that includes 24 nodes has been proposed to dissect the dam and foundation effectively, whose shape function are independent. In fact the element can be looked as a hexahedron divided into five small hexahedrons. It can be simulate all kind of the condition of the base and the dam.
拱坝的地基一般是层状岩石地基,有的层厚度很小,这样就有多个岩层和坝体某层单元接触,本文根据岩基与坝体接触的几何关系,利用形函数的性质,提出24节点六面体层单元,这种单元实际上是将一个厚的六面体单元分成5个更薄的六面体单元而形成的,其形函数采用可以拆分的形式表达,因此可以方便地解决坝体单元的一、二、三、四个面与错动带接触的情况,可以模拟一、二、三、四个棱边与错动带接触的情况,还可以退化为12节点的四边形面单元,以及五面体层单元。
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A building material composed of wood chips or plant fibers bonded together and compressed into rigid sheets.
t.b。分成薄层的。。。 tabular 板状的;薄层的;表格式的;平的。。。TB薄层
- 更多网络解释与分成薄层相关的网络解释 [注:此内容来源于网络,仅供参考]
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mantle:地函
依据震波速度之不连续性,可将地球内部分成(由上而下):地壳(EarthCrust),地函(Mantle)及地核(Core)三带. 地壳和地函之间的分界面被称为「莫霍界面」(Moho discontinuity)莫氏不连续面岩石圈(Lithosphere)下之软层圈为软流圈(Asthenosphere)属於上部地函(upper mantle)海洋的外壳通常比较薄,
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cerebral hemispheres:大脑两半球
大脑的外表面由数十亿细 大脑 胞组成,形成 1/10 英寸厚度的薄层组织,称为大脑皮层(cerebral cortex) 大脑皮层( .大脑分成左右 大脑皮层 ) 对称的两半,称为大脑两半球 大脑两半球(cerebral hemispheres).