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		任意斜裂纹转子的耦合振动研究 1)
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			STUDY ON COUPLED VIBRATIONS OF ROTOR WITH AN ARBITRARY SLANT CRACK 1)
			 
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		 图8. 任意斜裂纹转子振动谱特征参数对方向角的敏感性: $\theta_{1} =[30^{{\circ}}$, 45$^{{\circ}}$, 60$^{{\circ}}$, 75$^{{\circ}}$],$\theta_{2} = 10^{{\circ}}\!\sim\! 90^{{\circ}}$  | 
	
Fig. 8. Sensitivity of spectral parameters of the arbitrary slant crack to orientation angle: $\theta_{1} = [30^{{\circ}}$, 45$^{{\circ}}$, 60$^{{\circ}}$, 75$^{{\circ}}$], $\theta_{2} = 10^{{\circ}}\!\sim\! 90^{{\circ}}$  | 
	
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