我船是单螺旋桨还是双螺旋桨船？
本文根据某船螺旋桨的噪声测量和激振试验结果，描述了螺旋桨鸣音的特点和产生鸣音的机理。
Peculiarities and mechanism of propeller singing are described based on results of acoustic measurements and vibration excitation tests of a Marine propeller.
本文扼要地介绍了高速船螺旋桨设计中碰到的螺旋桨选型问题、相互作用系数选取问题以及某些图谱和经验公式的应用。
This paper concisely describes the selection of propeller type and interaction coefficients for high speed, and gives the application of some diagrams and empirical formulas.
通过无量纲分析船模螺旋桨噪声可以预报实船的螺旋桨噪声。
Ship propeller noise can be predicted by non-dimensional analysis of ship model propeller noise.
实船试验表明，该合金螺旋桨比铜合金螺旋桨噪声有较大幅度降低。
Ship sailing tests show the propellers made of this alloy have much lover noise than copper alloy propellers.
但新近完成的某双桨船的回转试验的多个实测结果表明：外侧螺旋桨负荷远大于内侧螺旋桨负荷。
In recent days, however, several recording results of a new twin-propeller ship gotten in sea trial indicated that the outside propeller's load is always heavier than the inside one.
本实用新型就是提供一种可有效延迟空泡的分离，并可延长螺旋桨桨叶使用寿命的截面拱度比非线性分布式船用螺旋桨。
The utility model provides a cross section camber ratio nonlinear distributed Marine propeller which can effectively delay the separation of the cavity bubble, and prolong the service life thereof.
由于船体的影响，双桨船的螺旋桨处于斜向来流的条件下运转。斜流造成螺旋桨叶工作状态的非定常性。
Because of the influence of the hull, the stern propeller of a twin-screw vessel is working under condition of oblique flow, and the unsteady working condition of the blade of a propeller is created.
船舶推进器已经被研究了很长时间，船用螺旋桨是船舶最重要的推进器。但是，直到现在，船用螺旋桨的设计和绘制仍然是很困难的。
The design and drawing of ship screws is being studied for long time and the propeller is the most important ship impeller.
同时，用参数化程序实现了船用螺旋桨的自动绘制。在论文的最后完成了船用螺旋桨计算机立体模型的建立和动画效果的处理。
At the same time the thesis brings the automatic drawing of propellers to success and builds the three-dimension model of propellers.
同时，用参数化程序实现了船用螺旋桨的自动绘制。在论文的最后完成了船用螺旋桨计算机立体模型的建立和动画效果的处理。
At the same time the thesis brings the automatic drawing of propellers to success and builds the three-dimension model of propellers.
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