【摘要】 通过蒸汽发生器管束模拟体试验,测定了不同弯头半径的传热管固有频率和振型。研究了间隙、支撑板梅花孔、弯头半径等因素对传热管固有频率的影响。分别测量了无耦合效应的面内对称、反对称和面外对称、反对称四种振型的固有频率,并通过单跨和两跨连续直梁固有振动试验确定了面内振动时弯头处的弹簧系数。前12阶固有频率的试验值和计算值符合得较好。试验表明:以结构固有频率激振时,间隙效应使传热管响应谱的频带变宽,但其中激振频率成分仍占优势。更多还原

【Abstract】 Experimental and analytical investigation of model steam generator heat transfer tubes with clearance and elastic supported effect was carried out. The experimental natural frequencies and normal modes of model tubes are found to be in good agreement with the corresponding analytical results. Both analytical and experimental results indicate that the antivibration bars between bends of tubes are effective.更多还原