elliptical cross section中文什么意思

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a precise solution for torsion of bars with hollow elliptical cross section
一類橢圓截面空心柱體扭轉(zhuǎn)的精確解
the impact of the shape-change trend towards round on bending stress during the process of pressure increase was researched, a common formula and a simplified one for bending stress calculation were established, the formula of maximum bending stress caused by round degree of cylindrical vessels was deduced, the calculation method for wall thickness of pressure vessels of elliptical cross section was introduced
摘要研究了橢圓形截面容器在升壓過程中的趨圓變形對彎曲應(yīng)力的影響，建立了彎曲應(yīng)力通用計算公式和簡化計算公式，導(dǎo)出了由圓度引起的圓筒形容器最大彎曲應(yīng)力計算公式，給出了橢圓形截面容器壁厚的計算方法。
when f is about fr, for curved pipes, the secondary flow appears eight vortexes for annular cross section and four for circular and four or six for elliptical; for helical pipe, the secondary flow appears as a loop flow for annular and circular cross section, and a saddle flow for elliptical cross section
當(dāng)f在fr左右時，對于彎管，環(huán)形截面上存在八個渦，圓截面上存在四個渦，橢圓截面上存在四個或六個渦；對于螺旋管，圓截面和環(huán)形截面上二次流表現(xiàn)為環(huán)流，橢圓截面上表現(xiàn)為鞍流。

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