1) concave surface
凹曲面
1.
The velocity,acceleration and time of a particle sliding down along a horizontally free concave surface are discussed.
对于一个质点从可自由移动的光滑的凹曲面上滑下的速度、加速度和时间作了一般性讨论,建立了相应的公式。
2.
The possible tracks of a particle BXm_(2), sliding down along a free movable concave surface with the mass m_(1) are analyzed.
运用质心运动定理,分析了质点在可自由移动的凹曲面上滑下时,质点对惯性系的运动轨迹方程。
3.
The concave surface characteristics of sandbag sand barrier of different sizes in different positions of sand dune were studied in this paper.
按不同规格,不同坡位,对设置一年后、总面积近25000m2的沙袋沙障内凹曲面特性进行了调查研究。
2) inner sunken face
内凹曲面
1.
In this paper,a combined pounch structure for plastic forming of work pieces with inner sunken faces is put forward.
提出一种可用于塑性成形带有内凹曲面工件的组合凸模结构。
3) cavity die camber
凹模曲面
4) concave roof
凹曲屋面
1.
First formulas about indination of several sections of broken line in the chi-nese traditional concave roof were infered in this paper.
本文首先导出中国传统凹曲屋面各段折线倾角的数学公式,然后经计算得出结论:中国传统大屋顶防太阳辐射效果比直坡屋顶好,比平屋顶更好。
5) concavo-convex surface
凹凸曲面
6) curved die
曲面凹模
1.
In this paper a kind of new curved die profile has been created by plastic theory and mathematical method: on the whole drawing process, the top of the side wall keeps in touch tangentially with the c.
通过分析拉深变形过程，在力学分析的基础上，提出了工件起皱失稳的条件，进而确定了曲面凹模拉深的起皱极限表达式。
补充资料：凹模壁厚及凹模垫板尺寸
型腔壁部投影面积 壁 厚， 毫 米
F， 厘米2 h1 h2 h3 h4 h5
<5 15~20 30~40 <=10 15~20 30~40
>5~10 20~25 40~50 10~15 20~25 40~55
>10~50 20~30 50~60 15~20 20~30 55~65
>50~100 30~35 60~75 20~25 30~40 65~70
>100~200 35~40 75~85 25~30 40~50 70~75
>200 >40 >85 30~35 50~60 >80
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条