Ice forces acting on towed ship in level ice with straight drift. Part I: Analysis of model test data

Zhou, Li; Chuang, Zhenju; Ji, Chunyan

doi:10.1016/j.ijnaoe.2017.03.008

Cited by 21 publications

(7 citation statements)

References 6 publications

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“…Wang et al [11] have found that ice cracking arises in the interaction between ice and propeller in ice milling tests, and Khan et al [16] observed crushing happened in propeller milling ice tests when the blade edge cut the ice block. Such crushing and fracture failures are also found in the interaction between ship and level ice [17,18,19,20]. These dis-continuous problems are difficult to be solved by simply using traditional FEM method that is based on the continuous assumption.…”

Section: Numerical Modelsmentioning

confidence: 99%

Numerical Simulation of Ice Milling Loads on Propeller Blade With Cohesive Element Method

Wang

Zou

Zhou

et al. 2019

brod

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In ice-infested waters, propellers of a polar ship are likely to be exposed to ice loads in different scenarios. Propeller milling with ice is one of the most dangerous cases for icepropeller interaction. In this study, we try to simulate dynamic milling process of icepropeller and reproduce resulting physical phenomena. Cohesive element method is used to model ice in the simulation. To simulate material properties of ice, an elastoplastic softening constitutive law is developed. Both crushing and fracture failures are included in the icepropeller milling process. The ice loads in 6 Dofs acting on blades of a propeller are calculated in time domain. The average and standard deviations of simulated dominant ice loads are compared with those from model test. A good agreement is achieved. By varying propeller rotation speed, advance velocity and cutting depth on ice block, the sensitivity study has been carried out. The results show that dominant ice loads are affected much by the three parameters. It is shown that decreasing rotation speed, or increasing advance velocity and cutting depth may lead to higher ice loads. Care should be taken to avoid overloading on propeller when operating in ice for polar ship.

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Section: Numerical Modelsmentioning

confidence: 99%

Numerical Simulation of Ice Milling Loads on Propeller Blade With Cohesive Element Method

Wang

Zou

Zhou

et al. 2019

brod

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“…During the 1970s and 1980s, the U.S. Army cold regions research and engineering laboratory (CRREL) conducted a series of full-scale tests of the USCGC Katmai Bay icebreaker in the Great Lakes, and Vance [29] proposed an ice resistance prediction formula based on this series of tests. Zhou [30][31][32] carried out a series of MT Uikku model tests in Alto University to observe the failure mode, the accumulation process of broken ice, measure the global ice load and the size of broken ice, and research the ice resistance and transverse force characteristics under different ice thickness, speeds, and drift angles. A novel method was proposed to simulate non-symmetric transverse force in a stochastic way.…”

Section: Introductionmentioning

confidence: 99%

Numerical Research on Global Ice Loads of Maneuvering Captive Motion in Level Ice

Xuan

Zhan

Liu

et al. 2021

JMSE

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In level ice, the maneuvering motion of icebreakers has a major influence on the global ice loads of the hull. This study researched the influences of the drift angle and turning radius on the ice loads of the icebreaker Xue Long through a partial numerical method based on the linear superposition theory of ice loads. First, with reference to the Araon model tests performed by the Korea Research Institute of Ships and Ocean Engineering (KRISO), numerical simulations of Araon’s direct motion were carried out at different speeds, and the average deviation between numerical results and model test results was about 13.8%. Meanwhile, the icebreaking process and modes were analyzed and discussed, compared with a model test and a full-scale ship trial. Next, the maneuvering captive motions of oblique and constant radius were simulated to study the characteristics of ice loads under different drift angles and turning radii. Compared with the maneuvering motion model tests in the ice tank of Tianjin University and the Institute for Ocean Technology of the National Research Council of Canada (NRC/IOT), the numerical results had good agreement with the model test results in terms of the variation trend of ice loads and ice–hull interaction, and the influences of drift angle and turning radius on ice resistance and transverse force, which have a certain reference value for sailing performance research and the design of the hull form of icebreaker ships, are discussed.

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“…It is important to make a reasonable prediction of ice loads on a polar ship. Many researchers have calculated ice loads numerically with the ice resistance formula [2][3][4] or numerical simulations [5][6][7][8][9][10][11][12]. However, the icebreaking capability for a polar ship has been seldom studied.…”

Section: Introductionmentioning

confidence: 99%

Calculation Methods of Icebreaking Capability for a Double-Acting Polar Ship

Zhou

Diao

Song

et al. 2020

JMSE

Self Cite

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As a key parameter, icebreaking capability is often used to judge whether a polar ship could navigate in level ice at a certain speed. This paper presents two methods to calculate icebreaking capability. The first one is a static method based on the estimation of ice resistance under different ice thicknesses and ship speeds. The second is a dynamic method that involves solving the equation of motion. A series of model tests with a double-acting icebreaking tanker were also carried out in the ice basin of the Krylov State Research Center to measure ice resistances. The simulated ice resistances were compared with model tests results for both ahead and astern running operations. The calculated icebreaking capability based on static and dynamic methods was validated with the model test result. A good agreement was achieved between measurement and simulation. The discrepancy between the model test result and the result simulated by the static or dynamic method was minor.

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Ice forces acting on towed ship in level ice with straight drift. Part I: Analysis of model test data

Cited by 21 publications

References 6 publications

Numerical Simulation of Ice Milling Loads on Propeller Blade With Cohesive Element Method

Numerical Simulation of Ice Milling Loads on Propeller Blade With Cohesive Element Method

Numerical Research on Global Ice Loads of Maneuvering Captive Motion in Level Ice

Calculation Methods of Icebreaking Capability for a Double-Acting Polar Ship

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