突加不平衡作用下转子系统的主动降载实验

为了实现突加不平衡作用下的转子安全性设计，分析了突加不平衡作用下的锥壁降载结构机理，设计了支承刚度可控的主动降载实验系统并进行了实验验证。结果表明:锥壁熔断降载的本质是减小转子支承刚度，从而降低临界转速并在减速停车时降低转子支承载荷与相应振幅。设计的主动降载机构利用可控支承，自适应地改变支承刚度，有效的模拟锥壁熔断降载作用，并能够低成本、重复性的实验验证熔断降载机理，为突加不平衡的安全性设计提供实验条件与数据支撑。 

Active load reduction experiment of rotor system undersudden unbalance

In order to finish the safety design of rotor system under sudden unbalance, the principle of load reduction by cone wall fused under sudden load was analyzed, the active load reduction experimental system with changing stiffness support was designed and experimental verification was finished. Research shows that the essence of cone wall fuse capable of reducing load is to reduce the stiffness of rotor support, accordingly, reduce the critical speed, the supporting load and amplitude in the deceleration process. The active load reduction structure change the support stiffness adaptively using changing stiffness, and can simulate the load reduction of cone wall fuse completely. Furthermore, it can verify the principle of load reduction by low-cost and highly repetitive experiment, and provide experimental conditions and data support for safety design of sudden unbalance.