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角度机构
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     THE OPTIMAL DESIGN OF THE ANGLE CONTROLLING MECHANISM OF VENEER LATHE
     旋切机角度控制机构的最优化设计
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     Rotation Axis and Angle in the Mechanism of Removal Transformation
     移动变换机构中的旋转轴和旋转角度
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     Kinematic Analysis of Mechanism
     机构的运动分析
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     2.angle.
     二、角度
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     Angles of Kloosterman Sums
     Kloosterman和的角度
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The boss of a CPP is significantly larger than that of a conventional propeller of similar size to accomodate the pitch changing mechamism. This will not only influence the chordwise pressure distribution on the bladesections neer the boss and will also affect the performance characteristics of a propeller in the open water. This paper presents a propeller lifting surface method with the inclusion of the effect due to the boss. A surface source distribution is used to replace the boss and the vortex lattice...

The boss of a CPP is significantly larger than that of a conventional propeller of similar size to accomodate the pitch changing mechamism. This will not only influence the chordwise pressure distribution on the bladesections neer the boss and will also affect the performance characteristics of a propeller in the open water. This paper presents a propeller lifting surface method with the inclusion of the effect due to the boss. A surface source distribution is used to replace the boss and the vortex lattice representation of propeller blader is also incorporated. Numerical results indicate that the blade pressure distributions in inner radii are significantly different from those without boss. Hence the precision of prediction of performance characteristics of propeller with large boss can be upgraded by the inclusion of the effect of the boss.

由于调距桨桨毂内部需要安装转动桨叶角度的机构,其毂径比较常规桨者要大,因此桨毂的存在不仅影响近毂处桨叶剖面上弦向压力的分布,而且还影响螺旋桨的敞水性能。为此,本文提供了一个计及桨毂影响的升力面方法。桨毂的影响以布置在其表面上的面源分布来模拟,螺旋桨叶采用离散的涡格法来处理。计算结果证实了:桨毂的存在明显影响近毂处剖面的弦向压力分布,对于大毂径比螺旋桨计及桨毂影响后将有利于提高计算精度。

Plate bending by line heating is a main forming method for bi-curve shell plate in shipbuilding. It is usually operated by means of template,so it is hard to automatic process. Researches on the relations between line heating parameters and forming have been published at home and aboard. It is necessary to measure angle deformation of plate after line heating. A new high precision measuring device for angle deformation of bending plate by line heating is presented and developed in this paper. It comprises two...

Plate bending by line heating is a main forming method for bi-curve shell plate in shipbuilding. It is usually operated by means of template,so it is hard to automatic process. Researches on the relations between line heating parameters and forming have been published at home and aboard. It is necessary to measure angle deformation of plate after line heating. A new high precision measuring device for angle deformation of bending plate by line heating is presented and developed in this paper. It comprises two high precision encoders that form measuring mechanism for angle. It is easily used. And very little angle deformation of bending plate can be measured with high accuracy ±0.01°.

水火弯板是船舶制造中加工船体双曲度外板的主要方法 .它通常采用人工对样进行操作加工 ,不利于实现生产自动化 .国内外都在研究水火加工参数与成形的量化关系 ,故需要测量加工后外板角度的变化 .文中提出并研制了一种新的角变形测量仪 ,它采用两个高精度光电编码器构成两个平面 ,组成测量角度的机构 ,解决了水火弯板中角变形测量问题 .使用证明 ,它操作简单 ,能准确实时地测量微小角变形数据 ,测量精度达± 0 .0 1°

 
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