Dynamic analysis and experimental verification for multibody system by using incremental rotation in time-discrete system

2018 ◽  
Vol 2018 (0) ◽  
pp. 707
Author(s):  
Kazuaki SHIMOJIMA ◽  
Kensuke HARA ◽  
Hiroshi YAMAURA
Keyword(s):  
Dynamic Analysis ◽  
Experimental Verification ◽  
Discrete System ◽  
Multibody System ◽  
Incremental Rotation

Multirate Integration for Multibody Dynamic Analysis With Decomposed Subsystems

1999 ◽  
Author(s):  
Sung-Soo Kim ◽  
Jeffrey S. Freeman
Keyword(s):  
Dynamic Analysis ◽  
Multibody System ◽  
Equations Of Motion ◽  
Low Frequency ◽  
Inertia Force ◽  
Integration Scheme ◽  
Integration Algorithm ◽  
Multibody Dynamic ◽  
Higher Order Derivative ◽  
Derivative Information

Abstract This paper details a constant stepsize, multirate integration scheme which has been proposed for multibody dynamic analysis. An Adams-Bashforth Moulton integration algorithm has been implemented, using the Nordsieck form to store internal integrator information, for multirate integration. A multibody system has been decomposed into several subsystems, treating inertia coupling effects of subsystem equations of motion as the inertia forces. To each subsystem, different rate Nordsieck form of Adams integrator has been applied to solve subsystem equations of motion. Higher order derivative information from the integrator provides approximation of inertia force computation in the decomposed subsystem equations of motion. To show the effectiveness of the scheme, simulations of a vehicle multibody system that consists of high frequency suspension motion and low frequency chassis motion have been carried out with different tire excitation forces. Efficiency of the proposed scheme has been also investigated.

Simulation of Multibody Dynamics in Autocad

1996 ◽  
Author(s):  
Shih-Tin Lin ◽  
Jhy-Hong Lin
Keyword(s):  
Dynamic Analysis ◽  
Multibody Dynamics ◽  
Variational Formulation ◽  
Input Data ◽  
Multibody System ◽  
Robot Manipulators ◽  
Mechanical Systems ◽  
General Purpose ◽  
User Friendly

Abstract A general purpose multibody dynamics algorithm is written and merged into AutoCAD. This merger creates a user friendly environment for the simulation of multibody mechanical systems such as robot manipulators. Users can prepare input data of the dynamic code easily after creating an AutoCAD drawing of the multibody system. After the dynamic analysis is complete, the results can be easily used to produce animation slides in AutoCAD. The multibody dynamics algorithm uses a recursive variational formulation. This formulation has been proven to be computationally more efficient.

Vibration Control of Flexible Multibody Aircraft During Touchdown Impacts

1987 ◽  
Vol 109 (3) ◽  
pp. 270-276 ◽  
Author(s):  
A. A. Shabana ◽  
R. D. Patel ◽  
A. DebChaudhury ◽  
R. Ilankamban
Keyword(s):  
Dynamic Analysis ◽  
Vibration Control ◽  
Random Process ◽  
Large Scale ◽  
Passive Control ◽  
Multibody System ◽  
General Purpose ◽  
Flexible Multibody ◽  
General Purpose Computer ◽  
Purpose Computer

A method is presented for the dynamic analysis and vibration control of large scale flexible multibody aircraft during the touchdown impacts and rollover motion. The rollover motion is simulated by modeling the uneven runway profile as a stationary zero mean space dependent random process defined by its spectral shape. The prescribed motions at the two landing gears will then represent a different time dependent random process with spectral shapes changing with the change in velocity of the aircraft. Composite materials which provide higher stiffness-to-weight ratios are used as a passive control system to reduce the aircraft vibration. The results of the numerical example presented showed that the use of composites can have a significant effect on attenuating the vibration of the aircraft during the touchdown impact and rollover motion. The numerical results are obtained using the general purpose computer program DAMS (Dynamic Analysis of Multibody System).

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