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在大惯性负荷振动试验的场合,如军工产品中大的结构件及整机的振动和振动疲劳试验,土建和水利系统中的抗地震试验,交通运输系统中的道路摸拟试验等,大多数都采用电液伺服式振动台。在这些使用场合,由于振动台直接承受的惯性负荷大,作动器的油柱谐振频率通常都低于工作频率的上限,因此该类型电液振动台与低频电液台不同,不能照搬电液伺服位置系统的设计理论。本文基于高频大负载电液振动台的工作特点,主要讨论该类型振动台与一般电液振动台设计理论的区别之处。
In the occasions of large inertia load vibration test, such as the vibration and vibration fatigue test of large structural parts and whole machine in military products, anti-seismic test in civil engineering and water conservancy systems, road test in transportation system and so on, most Have adopted electro-hydraulic servo vibration table. In these applications, due to the inertia load directly borne by the vibrating table, the resonance frequency of the oil column of the actuator is usually lower than the upper limit of the operating frequency. Therefore, this type of electro-hydraulic vibrating table is different from the low- Servo position system design theory. Based on the working characteristics of high-frequency and large-load electrohydraulic vibration table, this paper mainly discusses the difference between this type of vibration table and the general design theory of electro-hydraulic vibration table.