Propeller-ice contact modeling with peridynamics

Propeller-ice contact modeling with peridynamics
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利用近场动力学进行螺旋桨-冰接触建模

DOI:
10.1016/j.oceaneng.2017.04.037
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发表时间:
2017-07
期刊:
影响因子:
5
通讯作者:
Zhang H. Y.
Zhang H. Y.
中科院分区:
工程技术2区
文献类型:
--
作者:
Ye L. Y.;Wang C.;Chang X.;Zhang H. Y.

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冰接触载荷对螺旋桨的安全运行构成威胁。对螺旋桨与冰的接触过程和动载荷进行了数值研究。介绍了基于周期运动学和接触检测法的数值计算方法。考虑到冰与螺旋桨力学性质的差异,将螺旋桨视为刚体,冰视为弹脆性。针对螺旋桨复杂表面,提出了一种连续接触检测算法,用于检测螺旋桨体与冰粒的接触面积。模拟了螺旋桨-冰接触过程中冰的脆性破坏行为。研究了瞬态极端接触载荷。结果表明,该方法能较好地反映冰的动态破裂和冰块生成等破坏特征,计算的接触载荷是可靠的。
The ice contact loads pose a threat to safe operation of propellers. The propeller-ice contact process and the dynamic loads have been investigated numerically. Numerical method based on peridynamics and contact detection method has been introduced. Considering the difference of the mechanical properties of ice and propeller, the propeller is assumed as rigid body and the ice is treated as elastic brittle. To deal with the complicated surface of propeller, a continuous contact detection algorithm has been developed to detect the contact area between propeller body and ice particles. The brittle failure behavior of the ice during propeller-ice contact is simulated. The transient extreme contact loads have been investigated. It is concluded that the method can well capture the ice failure features, such as dynamic cracks and generation of ice pieces, and the calculated contact loads are reliable.
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