| Author Name | Affiliation | | MA Xiao-feng | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China
Guocience & Tecdian Shnology Research Institute,Nanjing 210031,China | | LIU Zhan-sheng | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | | WANG Gui-long | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China | | HOU Xian-ke | School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: |
| To study the dynamic characteristics and damping mechanism of impact-contact between the tips of blades further more,the impact-contact between the tips of a pair of blades was studied through numerical simulation.In this paper,the dynamic equation of contact-impact between the tips was established and Newmark direct integration method was adopted in numerical simulation.The nonlinear response characteristics and damping mechanism of impact-contact system are obtained.The results of numerical simulation were obtained as follows:As the clearance between blade shrouds is smaller,the vibration amplitude is smaller.The clearance between blade shrouds has a great influence on the input energy of the aerodynamic-excitation-vibration force.As the clearance of blade shrouds increases,the input energy of the aerodynamic-excitation-vibration force increases rapidly. |
| Key words: blade with tip impact-contact nonlinearity |
| DOI：10.11916/j.issn.1005-9113.2011.03.010 |
| Clc Number:TG71 |
| Fund: |
