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Flexible Multibody Dynamics
Efficient Formulations with Applications
Arun Banerjee
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eBook - ePub
Flexible Multibody Dynamics
Efficient Formulations with Applications
Arun Banerjee
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About This Book
This book demonstrates how to formulate the equations of mechanical systems. Providing methods of analysis of complex mechanical systems, the book has a clear focus on efficiency, equipping the reader with knowledge of algorithms that provide accurate results in reduced simulation time.
- The book uses Kane's method due to its efficiency, and the simple resulting equations it produces in comparison to other methods and extends it with algorithms such as order-n
- Kane's method compensates for the errors of premature linearization, which are often inherent within vibrations modes found in a great deal of public domain software
- Describing how to build mathematical models of multibody systems with elastic components, the book applies this to systems such as construction cranes, trailers, helicopters, spacecraft, tethered satellites, and underwater vehicles
- It also looks at topics such as vibration, rocket dynamics, simulation of beams, deflection, and matrix formulation
Flexible Multibody Dynamics will be of interest to students in mechanical engineering, aerospace engineering, applied mechanics and dynamics. It will also be of interest to industry professionals in aerospace engineering, mechanical engineering and construction engineering.
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1 Derivation of Equations of Motion
DOI: 10.1201/9781003231523-2
1.1 Available Analytical Methods and the Reason for Choosing Kaneās Method
In this book, we formulate equations of motion for a system of rigid and flexible bodies undergoing large overall motion, where large overall motion for a flexible body means a small elastic vibration of the body with respect to a frame moving in large rotation and/or translation. Various choices of analytical methods are available for deriving equations of motion, v, such as NewtonāEuler methods and methods based on DāAlembertās principle together with the principle of virtual work, Lagrangeās equations, Hamiltonās equations, BoltzmannāHamel equations, Gibbs equations, and Kaneās equations. The most recent among these is Kaneās method, based on a paper published in 1965, by Kane and Wang [1], and the method was given detailed exposition, with extensive applications, by Kane [2], Kane and Levinson [3], and Kane, Likins, and Levinson [4].
In a survey paper, Kane and Levinson [5] took up a fairly complex example, of an 8 degree of freedom (dof) system consisting of a spacecraft containing a four-bar linkage to show the difference between seven analytical methods; an application to a flexible spacecraft was also considered. The conclusion in Ref. [5] was that (i) DāAlembertās method is less laborious than a method using the conservation of momentum, with both methods requiring the introduction and elimination of constraint forces;...