Journal of Computational and Nonlinear Dynamics: Recent submissions
Now showing items 1481-1500 of 1786
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Electrostatics and Self-Contact in an Elastic Rod Approximation for DNA
(The American Society of Mechanical Engineers (ASME), 2011)Deoxyribonucleic acid (DNA) is an essential molecule that enables the storage and retrieval of genetic information. In its role during cellular processes, this long flexible molecule is significantly ... -
Shil’nikov Analysis of Homoclinic and Heteroclinic Orbits of the T System
(The American Society of Mechanical Engineers (ASME), 2011)We study the chaotic behavior of the T system, a three dimensional autonomous nonlinear system introduced by (2005, “Analysis of a Dynamical System Derived From the Lorenz System,” Scientific ... -
General Method for Modeling Slope Discontinuities and T-Sections Using ANCF Gradient Deficient Finite Elements
(The American Society of Mechanical Engineers (ASME), 2011)Slope discontinuities and T-sections can be modeled in a straight forward manner using fully parameterized absolute nodal coordinate formulation (ANCF) finite elements that have a complete set ... -
Efficient Model Development for an Assembled Rotor of an Induction Motor Using a Condensed Modal Functional
(The American Society of Mechanical Engineers (ASME), 2011)In order to predict the lateral rotordynamics of a high-speed induction motor, an optimization procedure is proposed for identifying the equivalent constitutive properties especially those of the ... -
Unified Galerkin- and DAE-Based Approximation of Fractional Order Systems
(The American Society of Mechanical Engineers (ASME), 2011)We consider numerical solutions of nonlinear multiterm fractional integrodifferential equations, where the order of the highest derivative is fractional and positive but is otherwise arbitrary. ... -
Computation of the Optimal Normal Load for a Mistuned and Frictionally Damped Bladed Disk Assembly Under Different Types of Excitation
(The American Society of Mechanical Engineers (ASME), 2011)Using nondimensional variables, the performances of friction dampers of a mistuned bladed disk assembly are examined for different types of excitation: white noise excitation, independent narrow ... -
An Explicit Difference Method for Solving Fractional Diffusion and Diffusion-Wave Equations in the Caputo Form
(The American Society of Mechanical Engineers (ASME), 2011)An explicit difference method is considered for solving fractional diffusion and fractional diffusion-wave equations where the time derivative is a fractional derivative in the Caputo form. For ... -
Rule-Based Fractional Control of an Irrigation Canal
(The American Society of Mechanical Engineers (ASME), 2011)In this paper, a SIMULINK simulation of a four-pool irrigation canal extant in Évora, Portugal is controlled using PID and fractional PID controllers, adjusted using an optimization method ... -
Analysis of a Chaotic Electrostatic Micro-Oscillator
(The American Society of Mechanical Engineers (ASME), 2011)The closed-loop dynamics of a chaotic electrostatic microbeam actuator are presented. The actuator was found to be an asymmetric two-well potential system with two distinct chaotic attractors: ... -
Analysis of Wheel/Rail Contact Geometry on Railroad Turnout Using Longitudinal Interpolation of Rail Profiles
(The American Society of Mechanical Engineers (ASME), 2011)In this investigation, a numerical procedure that can be used for the analysis of wheel/rail two-point contact geometries in turnout sections is developed. In turnout section, the tongue rail ... -
Numerical Techniques for Approximating Lyapunov Exponents and Their Implementation
(The American Society of Mechanical Engineers (ASME), 2011)The algorithms behind a toolbox for approximating Lyapunov exponents of nonlinear differential systems by QR methods are described. The basic solvers perform integration of the trajectory and ... -
Control Constraint Realization for Multibody Systems
(The American Society of Mechanical Engineers (ASME), 2011)This paper discusses the problem of control constraint realization applied to generic underactuated multibody systems. The conditions for the realization are presented. Focus is placed on the ... -
Development and Validation of Geometry-Based Compliant Contact Models
(The American Society of Mechanical Engineers (ASME), 2011)Simulations are often used to evaluate space manipulator tasks that involve contact with the environment, due to the difficulty of performing realistic earth-based experiments. An important aspect ... -
Nonlinear Fractional Derivative Models of Viscoelastic Impact Dynamics Based on Entropy Elasticity and Generalized Maxwell Law
(The American Society of Mechanical Engineers (ASME), 2011)Two types of models are proposed for describing nonlinear fractional derivative dynamical behavior of viscoelastic materials subject to impulse forces. The models are derived based on the ... -
A Semi-Analytical Study of Stick-Slip Oscillations in Drilling Systems
(The American Society of Mechanical Engineers (ASME), 2011)Rotary drilling systems are known to exhibit torsional stick-slip vibrations, which decrease drilling efficiency and accelerate the wear of drag bits. The mechanisms leading to these torsional ... -
Nonlinear Dynamic Responses of Elastic Structures With Two Rectangular Liquid Tanks Subjected to Horizontal Excitation
(The American Society of Mechanical Engineers (ASME), 2011)Nonlinear vibrations of an elastic structure with two partially filled liquid tanks subjected to horizontal harmonic excitation are investigated. The natural frequencies of the structure and ... -
Multistage Adomian Decomposition Method for Solving NLP Problems Over a Nonlinear Fractional Dynamical System
(The American Society of Mechanical Engineers (ASME), 2011)This paper deals with implementation of the multistage Adomian decomposition method (MADM) to solve a class of nonlinear programming (NLP) problems, which are reformulated with a nonlinear system ... -
The Fractional Morphology and Growth Rate of the Nautilus pompilius: Preliminary Results Based on the R1-Fractional Trigonometry
(The American Society of Mechanical Engineers (ASME), 2011)This paper studies the morphology and evolutionary growth of the Nautilus pompilius based on the fractional R1-trigonometry. Morphological models based on the fractional trigonometry are shown to ... -
Determination of Modal Parameters in Complex Nonlinear Systems
(The American Society of Mechanical Engineers (ASME), 2011)This paper describes a methodology for evaluating the modal parameters of complex nonlinear systems. It combines four different tools: the Coleman post-processing, the partial Floquet analysis, ... -
Closed Form Control Gains for Zero Assignment in the Time Delayed System
(The American Society of Mechanical Engineers (ASME), 2011)Control of the vibrating structures is desirable in various engineering applications for preventing fatigue and failure. It can be achieved by passive means using dynamic absorbers or by active ...