Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"Multibody dynamics"”.
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Assessment of finite element approximations for nonlinear flexible multibody dynamics
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1991.
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Advanced Multibody Dynamics Modeling of the Freight Train Truck System
… at Virginia Tech focused on better capturing the dynamics of the friction wedge, modeled as a 3D rigid body. The current study extends that work to a half-truck model treated as an application of multibody dynamics with unilateral contact to model the friction wedge interactions with the bolster …
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INTERPOLATION OF RIGID-BODY MOTION AND GALERKIN METHODS FOR FLEXIBLE MULTIBODY DYNAMICS
Traditionally, flexible multibody dynamics problems are formulated as initial value problems: initial states of the system are given and solving for the equations of motion yields the dynamic response. Many practical problems, however, are boundary rather than initial value problems; two-point and …
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Development and implementation of a combined discrete and finite element multibody dynamics simulation environment
… to be infinitely rigid. However, there are multibody systems for which it is useful to take into account the deformability of the simulated bodies. The objective of this research is to incorporate deformability in DEM, enabling the evaluation of the stress and strain distributions within …
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Propeller whirl flutter analysis of the nasa all-electric X-57 through multibody dynamics simulations
… and how it influences the design of the vehicle. Multibody dynamics analysis (MBD) is used for this study, Dymore, with correlating data from CAMRAD II given by NASA. Along with numerous studies of the X-57 using these MBDs, two cases are presented for validating the use of multibody dynamics: a …
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A Multibody Dynamics Approach to the Modeling of Friction Wedge Elements for Frieght Train Suspensions
This thesis presents a theoretical application of multibody dynamics with unilateral contact to model the interaction of the damping element in a freight train suspension, the friction wedge, with the bolster and the side frame. The objective of the proposed approach is to produce a stand-alone …
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Multibody Dynamics Modeling and System Identification for a Quarter-Car Test Rig with McPherson Strut Suspension
… identification of both a linear and a non-linear multibody dynamics McPherson strut quarter-car suspension model. Both models are developed using a method customary to multibody dynamics so that the same numerical integrator can be used to compare their respective performances. This method …
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Qualitative and Quantitative Investigation of Planar Multibody Dynamics Encompassing GSSSS Family of Algorithms - A Novel In-depth Look
… in the simulation of constrained rigid/flexible multibody systems has prompted the development of a wide variety of time integration methods for the differential-algebraic equations (DAEs) inherent to these systems. The vast majority of these methods require refor- mulation of the natural index 3 …
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Predictive Simulation of Musculoskeletal Models Using Direct Collocation
… simulations also require the ability to derive multibody dynamics and implement musculotendon models. Furthermore, these need to be formulated in a way suitable for OCPs. Two software packages, Pynamics and Pyomechanics, which formulate multibody dynamics and musculoskeletal OCPs respectively, …
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Sensitivity Analysis and Optimization of Multibody Systems
Multibody dynamics simulations are currently widely accepted as valuable means for dynamic performance analysis of mechanical systems. The evolution of theoretical and computational aspects of the multibody dynamics discipline make it conducive these days for other types of applications, in …
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Dynamic instabilities imparted by CubeSat deployable solar panels
In this work, multibody dynamics simulation was used to investigate the effects of solar panel deployment on CubeSat attitude dynamics. Nominal and partial/asymmetric deployments were simulated for four different solar panel assemblies. Trend lines were obtained for the evolution of the angular …
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Machine Learning from Computer Simulations with Applications in Rail Vehicle Dynamics and System Identification
… stochastic modeling for learning the behavior of multibody dynamics models is investigated. The stochastic modeling technique is also known as Kriging or random function approach. Post-processing data from a simulation run is used to train the stochastic model that estimates the relationship …
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Vibration Analysis of a Wind Turbine Multi-Stage Planetary Gearbox Incorporating a Flexible Body Component
… on the combination of a flexible body and a multibody dynamics analysis software. This is done through the usage of MSC ADAMS, a multibody dynamic analysis program, and MSC Patran/Nastran, a finite element analysis software, and its associated solver. The model is created to show the …
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Supermanoeuvrability in a biomimetic morphing-wing aircraft
… and computational models of biomimetic flight dynamics are developed, utilising multibody dynamics, computational fluid dynamics, and reduced-order aerodynamic models; and validated with respect to experimentally-derived flight dynamics of a Pioneer RQ-2 UAV. These models are used to explore …
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DEM-based numerical simulation of drainage plows and dewatering trenchers
… research. The chain motion is controlled using a multibody dynamics approach then coupled with the same DEM framework used for plow simulation to simulate the complete trencher cutting process.
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Dynamics and Control of Flexible Multibody Structures
… modeling the controlled motion of an open loop multibody structure comprised of an arbitrary number of rigid bodies and slender beams. The procedure presented here for deriving equations of motion for flexible multibody systems is carried out by means of the Principle of Virtual Work (often …
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Modelling of high-energy grinding processes
… Thesis chiefly proposes the implementation of a multibody dynamics model of the planetary ball milling process, its direct and indirect validation – respectively against movie collected in-operando and properties of the end product revealed by the analysis of X-ray powder diffraction data –, the …
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Investigating the biomechanics of a lizard skull using advanced computer modelling techniques with experimental validation
… techniques. This study aimed to perform a multibody dynamics analysis (MDA) on a biting lizard skull so that bite forces, joint forces, ligament forces and muscle forces could be accurately predicted. Then, using this MDA load data stresses and strains within the skull were assessed using …
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Design of a Robotic Equine Forelimb for Testing Load-Bearing Rehabilitative Devices
… has been designed in IDEAS and analyzed using multibody dynamics simulations code and the finite-element-analysis software ANSYS. To evaluate the function of the robotic replica, a control system was developed to reproduce observed gait characteristics. Comparison of the computer-simulated gait …
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Design and dynamic simulation of mobile manipulators incorporating tribological analysis of 16MnCr5 and EN19 steels.
… To this end, the Computer Aided Design (CAD)-Multibody dynamics (MBD) simulation technique was applied instead of traditional numerical modelling and roofs-of-concept for two types for manipulators, i.e. anthropoid and complex closed-loop manipulators are presented. The combined friction model …
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