Transient Analysis and Safety Assessment of Turbofan Engine Structures during Bird Ingestion

Table 2

Reasons of failure.

Serial number	Failure cause
1	The birds impact the fan blade, causing it to fail and break off
2	The birds impact the stationary part, falling cuttings and being thrown out due to the fan motion
3	The birds impact the stationary/rotor part, falling cuttings and being thrown out
4	The bird carcass impacts the blade, causing it to fail or fracture and be thrown out
5	Debris is generated due to the interaction of the upstream stationary/rotor part and bird ingestion, and the debris hit the downstream rotor causing the debris to be thrown out
6	The bird carcass impacts the primary support plate
7	Debris of the upstream parts hits the primary support plate after bird ingestion
8	The bird ingestion load transmits to the primary support plate directly
9	The bird ingestion load transmits to the primary thrust bar
10	The bird ingestion load transmits to the bearing block, causing it to fail
11	Deformation of the drum and rotor binding shows up due to load transmission