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旋转壳-流体耦合系统频率响应的动态设计 被引量:2

DYNAMIC DESIGN OF FREQUENCY RESPONSE FOR ROTATING SHELL-LIQUID INTERACTION SYSTEM
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摘要 基于流固耦合理论 ,对浸水旋转壳频率响应的动态设计进行了比较全面的研究。针对动态设计中动力学重分析计算量大的问题 ,在对旋转壳 -流体耦合系统进行动力学建模时 ,对于旋转壳 ,根据其结构特点引入了既能保证计算精度又能大大提高计算效率的有限条法 ;对于流场 ,则采用边界元法来解决无限域问题和提高计算效率 ;然后利用凝聚降阶减小计算量 ,通过一种改进的模态迭加技术获得系统响应。计算结构动力响应及其灵敏度时 ,将灵敏度分析方法与动力响应计算方法相结合 ,得到动态灵敏度分析的快速算法。采用多目标优化方法 ,以重量、响应作为设计目标 ,对旋转壳结构进行了动力优化设计。计算实例表明 ,本文方法有效 ,并满足工程需要。 As a non-classical problem, the dynamic design of liquid-structure system is more complex than that of dry structure. Based on the liquid-structure interaction theory, FS and BE methods are used to analyse the system, leading to degrade the scale of computation. Then the sensitivity derivatives of the non-classical system are given and the multi-objective optimum method is used to minimize the system's response and the shell's weight. It is shown by the results that the method proposed in the paper is effective.
出处 《振动与冲击》 EI CSCD 北大核心 2001年第3期35-39,共5页 Journal of Vibration and Shock
基金 国家自然科学基金资助项目 (编号 :1 970 2 0 0 4 )
关键词 浸水旋转壳 频率频应 动态设计 流固耦合 结构设计 动力学理论 结构振动 旋转壳-流体耦合系统 rotated shell submerged in fluid,frequency response,liquid_structure interaction,structure optimum
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