The larger the critical diameter of sediment, the smaller the sacle of funnel is applied so as to strengthen the vortex to discharge sediment with less water consumption.
排沙下界粒径较大时，可以选择较小的漏斗尺寸，使涡流强度提高以较小的耗水率排放泥沙。
Calculation for short columns using Grade Q235 steel tube filled with Grade C30 concrete indicates that the critical diameter to thickness ratio of steel tubes is about 1700.
对Q235钢材、C30混凝土短柱构件的计算结果表明，钢管的最小临界径厚比为1700左右。
An axially compressive thin-walled steel element on elastic foundation is adopted to deduce the critical stress and critical diameter to thickness ratio for circular steel tube in local buckling.
在此基础上，把薄壁钢管纵向单元作为支承在弹性地基上的压杆，推导出钢管出现局部屈曲的临界应力和临界径厚比。
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