1) diameter selection
洞径选取
1.
A tunnel of certain hydroelectric power project is taken as example;numerical method of diameter selection for the tunnel is introduce.
本文以某水电站引水发电隧洞为例,介绍了发电隧洞洞径选取的数值方法。
2) tunnel path choosing
洞径选择
1.
This paper discussed several problems that should be paid attention to in water diversion system design for hydropower station, for instance ,development pattern,tunnel path choosing,pressure adjusting ,the type of steel branch pipe choosing and some other tips.
阐述了水电站引水系统设计应引起重视的几个问题 ,如开发方式、洞径选择、调压井与钢岔管型式选择等 ,供同行参
3) economical tunnel diameter
经济洞径
1.
Namely when the tunnel total expense is the minimum,the corresponding tunnel diameter is the best,this diameter is considered as economical tunnel diameter.
如要选取适当的发电隧洞洞径,则要寻求在隧洞计算期内的总费用最小值,即只有当隧洞的总费用达到最小时的洞径才是最佳的,此时对应的洞径即是经济洞径。
4) cavity radius
空洞半径
1.
A three-dimensional rigid-visco plastic finite element method(FEM) program has been developed to predict the variation of cavity radius and volume fraction.
运用三维刚粘塑性有限元程序,模拟预报空洞半径和体积分数在单向拉伸过程中的变化规律。
5) short-diameter pinhole
小洞径
6) Den selection
洞穴选择
补充资料：径径
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