本文讨论了用于家用空调机组的风扇排气格栅系统的振动特性，该系统具有恼人的嘎嘎声和可见的振动。确定了与这些嘎嘎声和振动有关的三个主要来源。这些来源是空调系统中的三种常见驱动力加上系统对它们的过度响应。恼人的嘎嘎声的主要原因是格栅的扭转振动模式，由风机电机扭矩脉动以两倍的线频率驱动。研究中采用了不同的实验技术——操作试验、扫掠试验、冲击试验和扭转振动台试验。驱动力可以通过将运行和扫掠试验中的振动峰值与风扇转速、叶片通道频率和线路频率相关联来确定。 未安装风扇的冲击试验和扭转振动试验可用于阐明系统响应的性质。单位:双引文:研讨会，ASHRAE交易，1998年，第104卷，pt。1A，旧金山

This paper discusses the vibration characteristics of a fan discharge grille system, used in residential air-conditioning units, which has annoying rattles and visible vibrations. Three main sources associated with these rattles and vibrations were identified. These sources were the three common driving forces in the air-conditioning systems plus the excessive system responses to them. The primary causes for the annoying rattles were the torsional vibration modes of the grille driven by the fan motor torque pulsation at two times line frequency. Different experimental techniques--operation test, sweep test, impact test, and torsional shaker test--were used in the investigation. The driving forces could be identified by correlating vibration peaks in the operation and sweep tests with the fan rotating speed, blade passage frequency, and line frequency. The impact test and torsional shaker test without the fan installed could be used to clarify the nature of the system responses.Units: Dual