Development of a Six-Component Blade Load Measurement Test Setup for Propeller-Ice Impact
Development of a Six-Component Blade Load Measurement Test Setup for Propeller-Ice Impact
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DOI：
10.1115/omae2012-84192
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发表时间：
2012-07
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影响因子：
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通讯作者：
G. Hagesteijn;J. Brouwer;R. Bosman
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文献类型：
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作者：
G. Hagesteijn;J. Brouwer;R. Bosman
冰对螺旋桨的影响是一个复杂的过程，最有可能导致研磨或破碎过程，或两者兼而有之。在冲击期间，高动态力可以在幅度和方向上快速变化。从刚性螺旋桨的经典试验装置中可以推导出的信息很少，特别是单个叶片上的力很少成功测量。本文将概述需要克服的挑战，以更准确地测量这些影响，并详细介绍了一个测量设置，已被证明捕捉实际的冰impacts.Classic设计的冲击载荷螺旋桨测试涉及刚性螺旋桨的力测量位于螺旋桨的基础。从这种类型的设置，立即出现两个问题。首先，当撞击相对较大的冰块时，将很难得出测量的力的哪一部分对一个叶片起作用，哪一部分对另一个叶片起作用。其次，在实际测试情况下，安装在力传感器上的整个螺旋桨的固有频率可能相对较低。人们怀疑冲击力中含有高频分量，导致整个螺旋桨组件振动，从而影响冲击载荷的正确测量。而不是测量一个完整的螺旋桨上的力，只有一个单一的叶片安装在一个力传感器。这种特殊的传感器能够测量x、y和z方向上的力以及围绕x、y和z轴的力矩。其他螺旋桨叶片直接安装在轴驱动器上。这种测量设置减少了第一个问题，测量信号中可见的任何影响都仅仅是由于仪表化“钥匙刀片”上的力。© 2012 ASME
The impact of ice on a propeller is a complex process, which most likely results into a milling or crushing process, or a combination. The highly dynamic forces during an impact can change rapidly in amplitude as well as direction. Little information can be deducted from classic test setups with rigid propellers, especially forces on the individual blades are seldom successfully measured. The presented paper will outline the challenges which need to be overcome to measure these impacts more accurately and elaborate on a measurement setup which has proven to capture the impact loads of actual ice impacts in great detail.Classic designs for propeller testing involve rigid propellers with force measurements located at the base of the propeller. From this type of setup, immediately two problems arise. First of all, when impacting relatively large ice blocks, it will be hard to derive which part of the measured forces contributes to one blade and which part to the other. Secondly, in practical test situations the natural frequency of the entire propeller mounted on a force transducer can be relatively low. Impacts are suspected to contain forces with high frequency components, causing the entire propeller assembly to vibrate and thereby obscuring a correct measurement of the impact loads.A measurement setup has been designed to overcome both problems. Rather than measuring the forces on a complete propeller, only a single blade is mounted on a force transducer. This particular transducer is capable of measuring forces in x-, y- and z-directions as well as moments around the x-, y- and z-axis. The other propeller blades are mounted directly on the shaft drive. This measurement setup reduces the first problem, any impact visible in the measurements signals are solely due to forces on the instrumented ‘key-blade’.© 2012 ASME