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首页> 美国卫生研究院文献>Data in Brief >Data for indirect load case estimation of ice-induced moments from shaft line torque measurements
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Data for indirect load case estimation of ice-induced moments from shaft line torque measurements

机译：根据轴扭矩测量结果间接估算冰致力矩的间接载荷工况数据

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During ice navigation, blade measurements of ice-induced moments on ship propellers, are challenged by the harsh operating environment. To overcome this problem, shaft line measurements are performed inboard, and the required propeller loads are subsequently estimated using a dynamic model and the solution of an inverse problem. The inverse problem is mathematically ill-posed and requires the determination of the ice-induced moment on the propeller blades from shaft line measurements. Full-scale torsional response data is presented as calculated from indirect strain measurements on the shaft line of a polar supply and research vessel. The vessel operated on a 68-day voyage between Cape Town and Antarctica and spent almost 11 days in sea ice with observed concentrations above 90% and a maximum thickness of 3 m. Data for five ice-induced load cases are presented, including the shaft torque from indirect measurements and the estimated ice-induced moment, which is obtained by solving an ill-posed inverse problem. The ice-induced moments on the propeller are obtained by approximating the drive-train as a viscously damped, elastic lumped mass model. The ice-induced moment is then determined through existing approaches to solving the ill-conditioned inverse problem. The lumped mass model is presented along with algorithms to solve the inverse problem, including truncated singular value decomposition, truncated generalized singular value decomposition and Tikhonov׳s method. The resulting time series data for the inversely calculated ice-induced moments is published to provide industry with load cases for ice-going propulsion design.
机译：在冰上航行期间，恶劣的操作环境挑战了桨叶测量船用螺旋桨上冰引起的力矩的能力。为了克服这个问题，在舷内进行了轴线测量，随后使用动态模型和反问题的解决方案估算了所需的螺旋桨载荷。反问题在数学上是不适当的，需要根据轴线测量值确定螺旋桨叶片上的冰致力矩。满量程扭转响应数据是根据极性供应和研究船的轴上的间接应变测量计算得出的。该船在开普敦和南极洲之间进行了为期68天的航行，在海冰中停留了近11天，观察到的浓度超过90％，最大厚度为3μm。给出了五个因冰引起的载荷工况的数据，包括来自间接测量的轴扭矩和估计的因冰引起的力矩，这是通过解决不适定的逆问题而获得的。通过将传动系近似为粘性阻尼，弹性集总质量模型，可以得出螺旋桨上的冰引起的力矩。然后，通过解决病态逆问题的现有方法确定冰诱发矩。提出了集中质量模型以及用于解决反问题的算法，包括截断奇异值分解，截断广义奇异值分解和Tikhonov方法。逆向计算出的冰引起的矩的时间序列数据将被发布，以为工业提供用于冰层推进设计的载荷工况。

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