摘要
针对航空发动机压气机转子叶片结构声振动问题,建立了薄壁板有限元简化模型,基于耦合有限元/边界元法对薄壁板在行波加载下随机声激励振动响应进行了仿真计算,得到了在不同声压级下的应力响应结果。改变声载荷激励方向,分别对薄壁板施加单音噪声激励和宽频随机噪声激励,通过仿真计算得到了不同角度随机声激励下薄壁板振动响应频响曲线。对比分析发现,薄壁板模态振型与噪声加载方向是引起薄壁板共振的重要因素。
To solve the structure-acoustic problems of the compressor rotor blades of aircraft engines, a simplified finite element model of thin-panel structure is created. Based on the FEM/BEM, the simulation of the thin-panel structure for traveling wave loading is taken under random acoustic excitation to obtain the stress response results of the structure at different sound pressure levels. The tone acoustic excitation and broadband random acoustic excitation in various directions are applied on thin panels. Through simulation, the vibration frequency response curves are obtained. The comparative analysis shows that the model shape and acoustic loading direction are the key factors of the thin-panel structure resonance.
出处
《沈阳航空航天大学学报》
2014年第4期23-28,共6页
Journal of Shenyang Aerospace University
