展开面积

异径管展开面积近似计算方法的探讨（上）

Discussion on approximate calculation method for developed area of different diameter pipe (ⅰ)

椭圆封头几何形状讨论及展开面积计算

Discussion on the geometry and calculation of the unwrapped area of ellipsoidal heads

但这些方法所得到的展开面积都不是球面的真实面积，而作图也不简便。

By these methods , each area is not the exact true area and it is also difficult to draw .

正螺旋面近似展开图面积的相对误差的分析

An analysis of relative error of the area of an approximate developing pattern of a right helicoid

根据覆盖件和展开件面积相等的原则，验证了该展开形状的精确。

The rule that the part and its blank are equal in the area proves the accurate outline .

本文已证明此展开图的面积的相对误差相当小。

It has been shown that the relative error of the area of this approximate developing pattern is rather small .

研究通风机叶轮的直线型叶片与单圆弧前盘的交线，并推导出了相关的交线方程，利用此方程就可以直接计算出直线型叶片的展开图及其面积、质量、重心位置等参数。

The interaction of a single-arc-shaped covering disk with a straight blade for the shroud-ed impeller of a fan is discussed and the relevant equation is derived .

可折展机构具备折叠时占用空间小，展开后覆盖面积大的特点可以很好地解决这一问题。

As deployable / foldable mechanism takes up small space when it is folded and it covers large area when it is deployed , it can be a good solution to this problem .

在求得了口径场各模式比值的基础上，利用模式展开法和口面积分法求解了喇叭在自由空间中的多模任意极化的远场辐射方向图。

After the ratios of the modes of the caliber field are obtained , far field radiate direction graph of multi-mode-arbitrary polarization is solved using pattern-expanding method and mouth-plane integral method when the horn antenna is an arbitrary space .