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短期风浪波高周期联合分布研究
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作者 马永亮 高志扬 +2 位作者 韩超帅 左青锋 陆国庆 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2023年第6期1111-1119,共9页
为了准确描述短期风浪波高周期的联合分布,采用条件概率方法提出新的联合分布模型,并给出新的波高周期联合概率密度函数表达式.该表达式仅包含有义波高、平均跨零周期2个参数,便于工程应用.以Pierson-Moscowitz (P-M)谱、布氏谱以及实... 为了准确描述短期风浪波高周期的联合分布,采用条件概率方法提出新的联合分布模型,并给出新的波高周期联合概率密度函数表达式.该表达式仅包含有义波高、平均跨零周期2个参数,便于工程应用.以Pierson-Moscowitz (P-M)谱、布氏谱以及实测波浪谱为靶谱,采用余弦波叠加方法模拟短期波浪,统计分析得到波高周期的经验联合分布.以经验联合分布为基准,对提出的联合分布模型以及现有文献中5种联合分布模型进行对比分析.采用均方根误差评价所有模型与经验分布的匹配程度.均方根误差结果表明,在所有模型中所提模型与经验分布最接近.模型之间的差异,主要体现在周期分布上.在所有模型中,所提模型导出的周期分布与经验分布最接近.所提模型采用显式闭合公式表示,可采用Hermite变换、Rychlic变换,将该模型推广到非高斯波浪情况. 展开更多
关键词 浪谱 单个波 周期分布 高周期联合分布 短期海况
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Seismic Response Analysis of Long-Span Suspen-Dome under Multi-Support Excitations 被引量:2
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作者 陈志华 乔文涛 王小盾 《Transactions of Tianjin University》 EI CAS 2010年第6期424-432,共9页
A practical suspen-dome project, Changzhou Gym roof, is adopted as an example and its transient analysis based on the multi-support excitations of the earthquake wave is carried out. Compared with the single support e... A practical suspen-dome project, Changzhou Gym roof, is adopted as an example and its transient analysis based on the multi-support excitations of the earthquake wave is carried out. Compared with the single support excitation, the position and value of the maximum stress under multi-support excitations both change and the amount of elements with obvious changes is large and more than 70% of the total. Moreover, when other terms are not changed, this influence will decrease as the span decreases, but increa... 展开更多
关键词 SUSPEN-DOME multi-support excitations single support excitation earthquake wave passage effect
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A discussion on the double wave theory and its applications to description of radiation atoms
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作者 梁方豪 《Science China Mathematics》 SCIE 2001年第3期402-408,共7页
The double wave theory (DWT), sometimes called the“non_statistical quantum mechanics” by its proposer, describes the state of each single particle in an ensemble with two wave functions which have a parameter corres... The double wave theory (DWT), sometimes called the“non_statistical quantum mechanics” by its proposer, describes the state of each single particle in an ensemble with two wave functions which have a parameter corresponding to the particle. However the basic postulates of the DWT show that this theory can hardly describe any quantum rules of the microscopic world. In the double wave descriptions, the wave feature of the behavior of microscopic particles and the discontinuity characteristic of energy almost disappear. The discussions on several problems of the radiation atoms made by the DWT's proposer on the basis of this theory are either mathematically incorrect or inconsistent with experiments and the usual theory. 展开更多
关键词 double wave functions particle ensemble single particle result of measurement of physical quantity double wave theory (DWT)
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