【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。更多还原

【Abstract】 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.更多还原