摘要
叠层板状结构是新型核反应堆设计中所采用的一种堆芯元件,具有结构合理、比功率高和传热性能好等显著特点。提出了单梁与多梁对接的力学模型,以干模态振型函数序列作为试函数对复模态振型方程进行变分求解,研究了叠层板状元件在湿模态下的固有频率与振型,发现叠层板状结构的流致振动具有复模态特性,文中初步找到一些规律性的结果,为设计和安全分析提供一些有用的方法和数据。
Flow-induced vibration and hydroelastic instability of parallel-plate assemblies are studied theoretically.A model of multi-parallel-beams joined with a single-beam is adopted in the theoretical analysis of the natural vibration characteristics of the parallel-plate assembly.In the theoretical calculation and analysis on the wet natural modes,the dry-modal functions are used as trial functions to solve the complex mode equation,utilizing the extended Galerkin method.Fluid-structure interaction on the parallel-plate assemblies is of complex-modal characteristics.Some regular results are drawn from theoretical analysis and calculations and it is beneficial to the design and safety of fuel elements in nuclear reactors.
出处
《振动与冲击》
EI
CSCD
北大核心
2007年第2期48-50,71,共4页
Journal of Vibration and Shock
基金
湖南省教育厅青年科学基金资助项目(01B017)
国家自然科学基金资助项目(40372124)
关键词
湿模态
叠层板
流固耦合
振型
wet-mode,parallel-plate assembly,fluid-structure interaction,vibrationmodal shape
