Dissertation > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use > Vibration isolation, damping materials and structures

Nonlinear Oscillation of Magnetic Levitation Uniformity Rigid Pole

Author GuoGuoNi
Tutor HuangDongSheng
School Nanjing University of Aeronautics and Astronautics
Course Structural Engineering
Keywords Nonlinear vibration Vibration Control Maglev technology Vertical vibration isolation Maglev Isolation System
CLC TB535.1
Type Master's thesis
Year 2009
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Vertical isolation or micro- vibration control , the problems faced by the traditional media or mechanical vibration isolator . The crux of the problem is that the traditional isolation device must have sufficient vertical stiffness and bearing capacity to support the weight of the upper structure its vertical stiffness , nonlinear performance and poor . Maglev technology applied to structural vibration control , breaking the traditional method of isolation , a brand new maglev nonlinear vibration isolation method . Application of non-contact , non-linear vibration isolation method , to solve the technical problems faced in the structure of micro- vibration control of traditional control methods . As a magnetic levitation in the structure of micro- vibration control technology in the application of basic research , derived Maglev uniform straight just lever nonlinear dynamic equations of the system , and the research system inspired response and excitation frequency disturbances in the ground , still the relationship between the suspension height , the main findings include: 1. maglev uniform straight rod vibration isolation system just nonlinear dynamic model ; 2 . based on electromagnetic theory derived from electromagnetic levitation force between suspension height relationship , it is assumed that the system damping parameters obtained maglev uniform straight just non - linear equations of motion of the rod vibration isolation system ; 3 . nonlinear vibration theory to study the stability of the nonlinear equations of motion , and the results show that the system in the stationary suspension height near just rod is L stable ; 4 . Gang rod straight uniform maglev response in harmonic ground motion and any ground input analysis of the response of the system and excitation parameters , the system the relationship between the parameters . The results show that : the response to the input of the system for any ground vibration performance of the system is a typical nonlinear dynamics system harmonic ground disturbance response with external excitation frequency and just change rod stationary suspension height change ; exist bifurcation point , only when stationary suspension height is greater than a certain value , the response of the system is only stable solution .

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