Uncertainty assessments of structural loading due to first year ice based on the ISO standard by using Monte-Carlo simulation

Sinsabvarodom, Chana; Chai, Wei; Leira, Bernt J.; Høyland, Knut V.; Næss, Arvid

doi:10.1016/j.oceaneng.2020.106935

Cited by 19 publications

(6 citation statements)

References 15 publications

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“…It is assumed that the epochal extremes, for example, yearly extreme wind speeds, are distributed according to the generalized (asymptotic) extreme value distribution with unknown parameters to be estimated on the basis of the observed data. The extreme values of ice loads are directly related to the reliability of the vessels since the ultimate limit states (ULSs) are generally based on extreme load effects [12]. Former studies of extreme ice load predictions are mainly based on the classic extreme value theory, which includes the peak amplitude approach [13], the asymptotic method [14,15], and the ACER method [16].…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Ice Load on Icebreaker Ship Based on Stochastic Ice Fields

Li,

Han,

2024

JMSE

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Accurately assessing ice loads is a fundamental issue in the field of structural design for ships in ice-covered regions. In this paper, we conducted research on extreme ice load estimation for icebreaking ships, combining stochastic theory with numerical simulation. Firstly, using sea ice data from the Arctic region of the United States National Snow and Ice Data Center, a stochastic ice field model was established under Arctic sea ice conditions using non-parametric estimation and the rejection sampling method, and ice field data were generated stochastically. Then, based on the stochastic ice field data, a three-dimensional numerical model of the interaction between the ice field and the ship hull was established, and the reliability of the numerical model was verified by experimental results. Finally, based on the numerical model of the interaction between the ice field and the ship hull, asymptotic methods were used to study the extreme ice load estimation in different parts of the ship hull, revealing the variation law of the extreme ice load in different parts of the ship hull. This study provides basic theory and technical support for the structural design of ships in polar regions and has engineering application value.

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Section: Introductionmentioning

confidence: 99%

Statistical Analysis of Ice Load on Icebreaker Ship Based on Stochastic Ice Fields

Li,

Han,

2024

JMSE

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“…Sea ice flexural strength, effective elastic modulus, and uniaxial compressive strength are important ice engineering properties. They are always used to assess the ice load exerted on marine structures in ice-infested waters (Sinsabvarodom et al, 2020;Su et al, 2010) and the load that can be supported by the floating ice (Masterson, 2009). Scientific and commercial activities have been expanding in the polar regions in recent years (Arctic Council, 2009;Mayewski et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic

Wang

Lü

et al. 2022

The Cryosphere

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Abstract. A total of 25 flexural and 55 uniaxial compressive strength tests were conducted in laboratory using landfast sea ice samples collected in the Prydz Bay. Three-point bending tests were performed at ice temperatures of −12 to −3 ∘C with force applied vertically to original ice surface, and compressive strength tests were performed at −3 ∘C with a strain-rate level of 10−6–10−2 s−1 in the directions vertical and horizontal to ice surface. Judging from crystal structure, the ice samples were divided into congelation ice, snow ice, and a mixture of the two. The results of congelation ice showed that the flexural strength had a decreasing trend depending on porosity rather than brine volume, based on which a mathematical equation was established to estimate flexural strength. Both flexural strength and effective modulus of elasticity increased with increasing platelet spacing. The uniaxial compressive strength increased and decreased with strain rate below and above the critical regime, respectively, which is 8.0 × 10−4–1.5 × 10−3 s−1 for vertically loaded samples and 2.0 × 10−3–3.0 × 10−3 s−1 for horizontally loaded samples. A drop-off in compressive strength was shown with increasing sea ice porosity. Consequently, a model was developed to depict the combined effects of porosity and strain rate on compressive strength in both ductile and brittle regimes. The mechanical strength of mixed ice was lower than congelation ice, and that of snow ice was much weaker. To provide a safe guide for the transportation of goods on landfast sea ice in the Prydz Bay, the bearing capacity of the ice cover is estimated with the lower and upper envelopes of flexural strength and effective elastic modulus, respectively, which turned out to be a function of sea ice porosity.

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“…Sea ice flexural strength, effective modulus, and uniaxial compressive strength are important ice engineering properties. They are always used to assess the ice load exerted on marine structures in ice-infested waters (Sinsabvarodom et al, 2020;Su et al, 2010) and the load that can be supported by the floating ice (Masterson, 2009). Scientific and commercial activities have been expanding in the polar regions in recent years (Arctic Council, 2009;Mayewski et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic

Wang

Lü

et al. 2022

Preprint

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Abstract. A total of 25 flexural and 55 uniaxial compressive strength tests were conducted using landfast sea ice samples collected in the Prydz Bay. Three-point bending tests were performed at ice temperatures of −12 to −3 °C with force applied vertically to original ice surface, and compressive tests were performed at −3 °C with a strain-rate level of 10−6–10−2 s−1 in the directions vertical and horizontal to ice surface. Judging from crystal structure, the ice samples were divided into congelation ice, snow ice, and a mixture of the these two. The results of congelation ice showed that the flexural strength had a decreasing trend depending on porosity rather than brine volume, based on which a mathematical equation was established to estimate flexural strength. Both flexural strength and effective modulus increased with increasing platelet spacing. The uniaxial compressive strength increased and decreased with strain rate below and above the critical regime, respectively, which is 8.0 × 10−4–1.5 × 10−3 s−1 for vertically loaded samples and 2.0 × 10−3–3.0 × 10−3 s−1 for horizontally loaded samples. A drop off in compressive strength was shown with increasing sea ice porosity. Consequently, a model was developed to depict the combined effects of porosity and strain rate on compressive strength in both ductile and brittle regimes. The mechanical strength of mixed ice was lower than congelation ice, and that of snow ice was much weaker. To provide a safe guide for the transportation of goods on landfast sea ice in the Prydz Bay, the bearing capacity of the ice cover is estimated with the lower and upper envelopes of flexural strength and effective modulus, respectively, which turned out to be a function of sea ice porosity.

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Uncertainty assessments of structural loading due to first year ice based on the ISO standard by using Monte-Carlo simulation

Cited by 19 publications

References 15 publications

Statistical Analysis of Ice Load on Icebreaker Ship Based on Stochastic Ice Fields

Statistical Analysis of Ice Load on Icebreaker Ship Based on Stochastic Ice Fields

Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic

Flexural and compressive strength of the landfast sea ice in the Prydz Bay, East Antarctic

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