Ice forces acting on towed ship in level ice with straight drift. Part II: Numerical simulation

Zhou, Li; Chuang, Zhenju; Bai, Xu

doi:10.1016/j.ijnaoe.2017.06.001

Cited by 15 publications

(8 citation statements)

References 7 publications

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“…Using the static method, we need to evaluate the ice resistance of polar ship and available thrust under certain ice conditions. A method was developed to calculate ice resistance by Zhou et al [14], which was used in the present study. The ice force consists of the icebreaking force and the ice submersion force.…”

Section: Static Methodsmentioning

confidence: 99%

“…The local icebreaking force on each hull node was estimated at each time step. The detailed information on the calculation of local ice force F bi was previously described by Zhou et al [14]. The total icebreaking force were calculated as the sum of all local forces F bi on each panel or hull node on the waterline at a certain time instance:…”

Section: Static Methodsmentioning

confidence: 99%

“…This remains a question. In previous research, the parameters C f and C l were often selected based on measurements or ice resistance by some empirical formulas [9,14,17,18]. In fact, measurements are sometimes unavailable due to limited condition.…”

Section: Sensitivity Studymentioning

confidence: 99%

“…Zhou et al [14] proposed a squared ice grid method to calculate dynamic ice forces. The ice grid could be taken as a simple static finite element.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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

Zhou

Diao

Song

et al. 2020

JMSE

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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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Section: Static Methodsmentioning

confidence: 99%

Section: Static Methodsmentioning

confidence: 99%

Section: Sensitivity Studymentioning

confidence: 99%

“…Zhou et al [14] proposed a squared ice grid method to calculate dynamic ice forces. The ice grid could be taken as a simple static finite element.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Zhou

Diao

Song

et al. 2020

JMSE

Self Cite

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show abstract

“…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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Experimental Research of Hull Vibration of a Full-Scale River Icebreaker

Sun

Pang

et al. 2020

J. Marine. Sci. Appl.

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Ice forces acting on towed ship in level ice with straight drift. Part II: Numerical simulation

Cited by 15 publications

References 7 publications

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

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

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

Experimental Research of Hull Vibration of a Full-Scale River Icebreaker

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