| 辽东湾锥体平台结构疲劳冰荷载的蒙特卡洛模拟 |
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| 引用本文： | 季顺迎,岳前进.辽东湾锥体平台结构疲劳冰荷载的蒙特卡洛模拟[J].海洋学报,2003,25(2):114-119. |
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| 作者姓名： | 季顺迎 岳前进 |
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| 作者单位： | 大连理工大学, 工业装备结构分析国家重点实验室, 辽宁, 大连, 116023 |
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| 基金项目： | 国家自然科学基金，中海石油渤海公司联合资助重点项目资助(59739170) |
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| 摘 要： | 利用辽东湾JZ20-2海域的海冰现场监测和数值推算资料,确定了海冰的厚度、速度和弯曲强度等海冰参数的概率分布特征;通过构造锥体结构动冰力函数,对该海域锥体平台结构的疲劳冰荷载进行了蒙特卡洛模拟.统计结果表明冰力幅值和冰力周期均符合对数正态分布.为更加合理地确定锥体平台结构的疲劳冰荷载,对冰力幅值和周期进行了联合概率分析.研究成果可用于辽东湾JZ20-2海域锥体平台结构的可靠性设计和疲劳寿命评估。
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| 关 键 词： | 冰荷载 结构疲劳 蒙特卡洛模拟 联合概率分布 |
| 文章编号： | 0253-4193(2003)02-0114-06 |
| 收稿时间： | 2002/4/19 0:00:00 |
| 修稿时间： | 2002年4月19日 |
Monte-Carlo simulation of fatigue ice-load for offshore platform with ice-broken cone in the Liaodong Gulf |
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| JI Shun-ying and YUE Qian-jin.Monte-Carlo simulation of fatigue ice-load for offshore platform with ice-broken cone in the Liaodong Gulf[J].Acta Oceanologica Sinica (in Chinese),2003,25(2):114-119. |
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| Authors: | JI Shun-ying and YUE Qian-jin |
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| Abstract: | The probability distributions of ice thickness, ice velocity and flexural strength are determined using the measured and simulated data for the JZ20 - 2 sea area in the Liaodong Gulf. Using dynamic ice-load function of ice-broken cone, the fatigue ice-load of one offshore platform structure with ice-broken cone is simulated with Monte-Carlo method. The statistical results show that the amplitude and period of ice-load both have lognormal distribution. The joint probability distribution of them is analyzed, which is great valuable to construct the fatigue ice-load for offshore platform with ice-broken cone. The present results can be applied to the probability design and cumulative damage analysis for offshore structure with ice-broken cone in the JZ20 - 2 sea area in the Liaodong Gulf. |
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| Keywords: | ice-load structure fatigue Monte-Carlo simulation joint probability distribution |
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