Damping In Vibration Slide Presentation
The concept of proportional damping is critically examined and a generalized form of proportional damping is proposed. It is shown that the proportional damping can exist even when the damping mechanism is non-viscous.Classical modal analysis is extended to deal with general non-viscously damped multiple degree-offreedom linear dynamic systems. The new method is similar to the existing method with some modifications due to non-viscous effect of the damping mechanism. The concept of (complex) elastic modes and nonviscous modes have been introduced and numerical methods are suggested to obtain them. It is further shown that the system response can be obtained exactly in terms of these modes. Mode orthogonality relationships, known for undamped or viscously damped systems, have been generalized to non-viscously damped systems. Several useful results which relate the modes with the system matrices are developed.These theoretical developments on non-viscously damped systems, in line with classical modal analysis,give impetus towards understanding damping mechanisms in general mechanical systems. Based on a first-order perturbation method, an approach is suggested to the identify non-proportional viscous damping matrix from the measured complex modes and frequencies. This approach is then further extended to identify non-viscous damping models. Both the approaches are simple, direct, and can be used with incomplete modal data.
Dynamics of Undamped Systems
Equation of Motion
Modal Analysis
Models of Damping
Single Degree-of-freedom Systems
Continuous Systems
Multiple Degrees-of-freedom Systems
Other Studies
Modal Analysis of Viscously Damped Systems
The State-Space Method
Methods in Configuration Space
Analysis of Non-viscously Damped Systems
Identification of Viscous Damping
Single Degree-of-freedom Systems Systems
Multiple Degrees-of-freedom Systems
Identification of Non-viscous Damping
Open Problems
Outline of the Dissertation
The Nature of Proportional Damping
Dynamics of Non-viscously Damped Systems
Symmetry Preserving Methods
Experimental Identification of Damping
Key:Damping ppt,Vibration damping ppt,Vibration damping power point presentation,Principles of vibration damping,Damping factor pdf,mtech machine design seminar topics,Engineering design seminar topics.
RSS Feed
Twitter
Monday, June 24, 2013
Unknown
Posted in 
