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不确定概率分布下的重要性测度及其稀疏网格解 被引量:2

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摘要 针对基本输入变量概率分布信息不可准确预知的情况,对基本变量基于方差的重要性测度进行分析,建立了随机不确定性分布参数,区间不确定性分布参数以及随机和区间混合不确定性参数条件下的3种重要性测度指标.该指标体系能够反映3种不确定性分布参数条件下,输入变量对结构系统输出性能的影响.由于基于方差的重要性测度计算量大,文中采用稀疏网格方法在每一分布参数实现值处进行计算.针对3种不确定性分布参数情况,分别利用稀疏网格方法和稀疏网格方法结合遗传算法对所提的重要性测度指标进行计算.通过数值算例和工程算例说明所提指标的合理性和所采用方法的高效性.
出处 《中国科学:技术科学》 EI CSCD 北大核心 2013年第10期1094-1100,共7页 Scientia Sinica(Technologica)
基金 国家自然科学基金(批准号:51175425) 高等学校博士学科点专项科研基金(批准号:20116102110003) 航空科学基金(批准号:2011ZA53015)资助项目
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二级引证文献15

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