Certain Type Turbofan Engine Whole Vibration Model with Support Looseness Fault and Casing Response Characteristics

Table 3

Parameters of casings.

Wall thickness/mm	Elastic modulus (Pa)	Density (kg/m^3)	Poisson’s ratio	Proportion; damping ratio	Proportion; damping ratio
15	2.07 × 10^11	7.8 × 10^3	0.3	5	1.35 × 10^−5