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 85 for “"multibody"”.
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Nonlinear stability of multibody systems
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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A distributed simulation environment for multibody physics
… environment, which can be used to model multibody physics, is developed. The software design is based on the object oriented paradigm and is implemented in C++ to run on a single workstation or multiple processors in parallel. It provides facilities to set up a multibody physics …
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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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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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Elbow Joint Contact Mechanics: Multibody and Finite Element Methods
… experiment measurements. Second, to develop multibody (MB) models of the same joints with the humerus cartilage represented with discrete rigid bodies interacting with the ulna cartilage with deformable contacts. Third, to optimize the deformable contact parameters used in the MB models to …
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Wave and current induced motions on TLPTAD multibody system
… tension leg platform – tender assisted drilling multibody system. The study includes an analysis of first and second-order wave loads on the system using the potential wave theory. It also analyzes the wave coupling effects by using frequency and time domain approaches. The analysis of current …
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Optimal Design and Control of Multibody Systems with Friction
In practical multibody systems, various factors such as friction, joint clearances, and external events play a significant role and can greatly influence the optimal design of the system and its controller. This research focuses on the use of gradient-based optimization methods for multibody …
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Modeling and Control of a Multibody Hinge-BargeWave Energy Converter
Wave Energy Converters (WECs) are devices used to extract energy from the waves. The particular WEC considered in this thesis is a three-body hinge-barge WEC, which is an articulated floating structure composed of 3 rectangular bodies interconnected by hinges, and it operates longitudinally to the …
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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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Direct Sensitivity Analysis of Spatial Multibody Systems with Joint Friction
… and adjoint sensitivity analysis of complex multibody dynamic systems. Multibody formulations with joint friction were developed in the recent years and these systems have to be modeled by highly non-linear differential algebraic equations (DAEs) that are difficult to solve using numerical …
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Advanced Multibody Dynamics Modeling of the Freight Train Truck System
… a half-truck model treated as an application of multibody dynamics with unilateral contact to model the friction wedge interactions with the bolster and the sideframe. The half-truck model created in MATLAB is a 3D, dynamic, multibody dynamics model comprised of four rigid bodies: a bolster, two …
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Conceptual Design and Simulation of a Multibody Passive-Legged Crawling Vehicle
… that uses passive legs attached to an actuated multibody structure. This new vehicle moves only its actuated body trunk to achieve locomotion; thus moving in a manner similar to that used by insect larvae known as caterpillars. The passive-legged design is termed a "crawling" vehicle, to …
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Development and validation of a computational multibody model of the elbow joint
Computational multibody models of the elbow joint can provide a powerful tool to study joint biomechanics, examine muscle and ligament function, soft tissue loading, and the effects of joint trauma. Such models can reduce the cost of expensive experimental testing and can predict some parameters …
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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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Aeroelastic Analysis of Rotor Blades Using Three Dimensional Flexible Multibody Dynamic Analysis
… to model complex three-dimensional bodies in a multibody system. Unlike most of the formulations based on the floating frame of reference method, which assume small or moderate deformations, the present formulation allows large elastic deformations within each frame by using the co-rotational …
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Visco-Elastic Nonlinear Constitutive Model for the Large Displacement Analysis of Multibody Systems.
… Model for the Large Displacement Analysis of Multibody Systems.
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Trajectory Generation for a Multibody Robotic System: Modern Methods Based on Product of Exponentials
… several trajectory generation algorithms for multibody robotic systems based on the Product of Exponentials (PoE) formulation, also known as screw theory. A PoE formulation is first developed to model the kinematics and dynamics of a multibody robotic manipulator (Sawyer Robot) with 7 revolute …
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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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