【摘 要】
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Applications that have coupling among disk and blades are investigated.A disk-blade unit often seen in engineering is presented.The governing relations for disk bending and blade bending are derived.F
【机 构】
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College of mechanical engineering,Beijing University of Technology,Beijing,100124
【出 处】
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第十六届全国非线性振动暨第十三届全国非线性动力学和运动稳定性学术会议
论文部分内容阅读
Applications that have coupling among disk and blades are investigated.A disk-blade unit often seen in engineering is presented.The governing relations for disk bending and blade bending are derived.Free vibration is then studied and the results show that disk-blades(DB)and blade-blade(BB)type coupling modes exist.The DB modes are observed to be evolved from the original BB modes in a previously studied case of a rigid disk case.The effects of stagger angle β on the coupling of the components are also examined.In the two extremes at β=0,the disk is uncoupled.In between,the two components are coupled.As β increases,the disk participates more strongly.Basically,as β increases,the disk flexibility contributes more and reduces the natural frequencies.The effect of rotation is the last to be discussed and the results show that frequency bifurcation occurs as the rotation rate increases because of disk flexibility.In these regions,there exist mode exchange and instability problems.
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