Aero-engine prewhirl nozzle vibration test device and method

The invention provides a vibration test device and method for a prewhirl nozzle of an aero-engine, and belongs to the technical field of structural dynamics tests. The pre-swirl nozzle vibration test device comprises a pre-swirl nozzle test piece, a rigidity simulation piece, an adapter piece and a supporting piece. The rigidity simulation piece comprises a first rigidity outer ring and a first rigidity inner ring connected with one end of the first rigidity outer ring. The adapter piece comprises a first adapter piece and a second adapter piece. The first adapter piece comprises a first outer edge ring, a first adapter ring and a first inner edge ring which are arranged in sequence; the second adapter piece comprises a second outer edge ring, a second adapter ring and a second inner edge ring which are sequentially connected with one another. A first annular cavity can be formed between the first adapter and the second adapter, and the pre-rotation nozzle test piece can be sleeved with the first annular cavi