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检索条件"任意字段=4th International Conference on Structural Nonlinear Dynamics and Diagnosis, CSNDD 2016"

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

4th International Conference on Structural Nonlinear Dynamic...

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

ISBN: (纸本)9783319639369

the proceedings contain 15 papers. the special focus in this conference is on structural nonlinear dynamics and diagnosis. the topics include: Exploring the nonlinear stochastic dynamics of an orchard sprayer tower moving through an irregular terrain;linearization of nonlinear resonances through the addition of intentional nonlinearities;tailoring of hysteresis across different material scales;three ways of treating a linear delay differential equation;nonlinear damping: From viscous to hysteretic dampers;simulation of abrasive wear with a coupled approach considering particles of different sizes;energy harvesting in a hybrid piezoelectric-electromagnetic harvester with time delay;modeling and parametric analysis of a piezoelectric flexoelectric nanoactuator;dynamics of a chain with four particles, alternating masses and nearest-neighbor interaction;linear versus nonlinear stability in hamiltonian systems;dynamics and saturation control of rotating composite beam with embedded nonlinear piezoelectric actuator;nonlinear vibrations of a shallow arch subject to resonant and low harmonic frequency excitations under 1:1 internal resonance;extreme pulse dynamics in mode-locked lasers.

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2018

4th International Conference on Structural Nonlinear Dynamic...

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2018

ISBN: (纸本)9789811394621

the proceedings contain 15 papers. the special focus in this conference is on structural nonlinear dynamics and diagnosis. the topics include: Oscillations under hysteretic conditions: From simple oscillator to discrete Sine-Gordon model;drops and bubbles as controlled traveling reactors and/or carriers including microfluidics aspects;convection in a horizontal porous annulus with quasi-periodic gravitational modulation;identification of non-stationary and non-linear drying processes;dynamics analysis and control of the Malkus-Lorenz waterwheel with parametric errors;nonlinear characterization of a bistable energy harvester dynamical system;the delayed van der Pol Oscillator and energy harvesting;reference dynamics based motion planning for robotic systems with flexible components;suppression of time-delayed induced vibrations through the dynamic vibration absorber: Application to the inverted pendulum;modal analysis investigation of mechanical Kerr frequency combs;characterization of rolling element bearing data using the Gottwald and Melbourne’s 0-1 test and the Hugichi fractal dimension;dynamical response of a planetary gear system with faults using recurrence statistics.

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nonlinear characterization of a bistable energy harvester dynamical system 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2018

作者： Lopes, Vinicius G. Peterson, João Victor L. L. Cunha Jr, Americo Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil

ISBN: (数字)9789811394638

ISBN: (纸本)9789811394621

this chapter explores the nonlinear dynamics of a bistable piezo-magneto-elastic energy harvester with the objective of determining the influence of external force parameters on the system response. Time series, phase space trajectories, Poincaré maps and bifurcation diagrams are employed in order to reveal system dynamics complexity and nonlinear effects, such as chaos incidence and hysteresis. © 2019, Springer Nature Singapore Pte Ltd.

关键词： Dynamical systems

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A Simplified Method for nonlinear Analysis of Piled Raft 4th

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4th GeoShanghai international conference on Advances in Soil dynamics and Foundation Engineering

作者： Jiang, Jie Hou, Kaiwen Ou, Xiaoduo Huang, Maosong Guangxi Univ Coll Civil Engn & Architecture Nanning 530004 Peoples R China Guangxi Univ Minist Educ Key Lab Disaster Prevent & Struct Safety Nanning 530004 Peoples R China Guangxi Univ Guangxi Key Lab Disaster Prevent & Engn Safety Nanning 530004 Peoples R China Tongji Univ Dept Geotech Engn Shanghai 200092 Peoples R China

ISBN: (纸本)9789811301315;9789811301308

Piled raft systems are often suitable as foundations for large buildings in soft soil, and the analysis of piled raft systems is very complex. On the basis of elasto-plastic analysis of single pile, the interaction relationship between pile and pile, pile and soil, soil and soil are considered to determine the stiffness matrix of pile group-soil system. the strength of soil varied along the depth is also considered. By solving the stiffness matrix equations, the vertical load-settlement relationship of piled raft foundation, axial load distribution in the piles along the depth and the load shared by piles and rafts were obtained. It needs no discretization of soil and pile along depth. therefore, the analysis procedure is much simplified. the analyzed results show that the smaller pile length diameter ratio has a significant impact on the overall stiffness of piled raft foundation and the load shared by cap. Compared to results of boundary element method and field tests, the presented solutions are shown in good agreement. For considering the strength of soil varying along the depth and nonlinear interaction between piles and soil, the theoretical model agreed with the fact quite well. Hence the proposed method can applied to the analysis of practical engineering problems.

关键词： Piled raft Vertical load Stiffness matrix nonlinear analysis Interaction

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Linear versus nonlinear stability in hamiltonian systems 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

作者： Verhulst, Ferdinand Mathematisch Instituut PO Box 80.010 Utrecht3508TA Netherlands

ISBN: (数字)9783319639376

ISBN: (纸本)9783319639369

the stability of periodic solutions of time-independent Hamiltonian systems is often studied by linearization techniques. In the case of two degrees of freedom near stable equilibrium this is a correct procedure, in the case of three or more degrees of freedom we present some counterexamples. the case of the classical Fermi-Pasta-Ulam chain with cubic and quartic interactions illustrates the instability phenomenon. © Springer international Publishing AG 2018.

关键词： Degrees of freedom (mechanics)

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nonlinear damping: From viscous to hysteretic dampers 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

作者： Semenov, Mikhail E. Solovyov, Andrey M. Meleshenko, Peter A. Balthazar, José M. Geophysical Survey of Russia Academy of Sciences Lenina av. 189 Obninsk249035 Russia Digital Technologies Department Voronezh State University Universitetskaya st. 1 Voronezh394006 Russia Applied Mathematics and Mechanics Department Voronezh State Technical University XXletiya Oktyabrya st. 84 Voronezh394006 Russia Communication Department Zhukovsky–Gagarin Air Force Academy Starykh Bolshevikov st. 54 "A" Voronezh394064 Russia Mechanical Engineering Division Research on Nonlinear Dynamics Chaos and Control Aerospace Science and Technology Department Aeronautics Institute of Technology Praça Mal al Eduardo Gomes 50 Vila das Acácias São José dos CamposSão Paulo12228-900 Brazil

ISBN: (数字)9783319639376

ISBN: (纸本)9783319639369

this paper is dedicated to a brief discussion on the nonlinear damping. We present the particular results for linear and nonlinear viscous dampers, for fractional damper and for the hysteretic damper. As a main purpose we consider the mathematical model of damper with hysteretic properties on the basis of the Ishlinsky-Prandtl model. the numerical results for the observable characteristics such as the force transmission function and the "force-displacement" transmission function are obtained and analyzed both for the cases of the periodic affection as well as for the impulse affection (in the form of δ-function). the comparison of the efficiency of nonlinear viscous damper and hysteretic damper is also presented and discussed. © Springer international Publishing AG 2018.

关键词： Delta functions

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Linearization of nonlinear resonances through the addition of intentional nonlinearities 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

作者： Habib, Giuseppe Kerschen, Gaetan Budapest University of Technology and Economics Műegyetem rkp. 3 Budapest1111 Hungary University of Liege 1 Chemin des Chevreuils LiegeB-4000 Belgium

ISBN: (数字)9783319639376

ISBN: (纸本)9783319639369

Important properties of linear systems, such as force-displacement proportionality and invariance of the resonant frequency, are not satisfied by nonlinear systems. the objective of this paper is to demonstrate that the intentional addition of properly tuned nonlinearities to a nonlinear system allows to retrieve those linear properties, enlarging the range over which a nonlinear system behaves linearly. Analytical findings are validated by numerical simulations. © Springer international Publishing AG 2018.

关键词： nonlinear systems

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nonlinear vibrations of a shallow arch subject to resonant and low harmonic frequency excitations under 1:1 internal resonance 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

作者： Chtouki, Abdelbassit Lakrad, Faouzi Belhaq, Mohamed Laboratory of Renewable Energy and Dynamics of Systems Faculty of Sciences Ain Chock University Hassan II Casablanca Maarif Casablanca5366 Morocco

ISBN: (数字)9783319639376

ISBN: (纸本)9783319639369

In the present work the nonlinear dynamics of a two degree of freedom shallow arch model, excited by resonant external harmonic forcing and subject to an imposed slow harmonic motion of its support, are investigated. the case of 1:1 internal resonance between the first and the second bending modes is studied. the charts of behaviors are obtained analytically using the multiple scales method, both in the presence and the absence of the slow excitation, and they are validated numerically. It is shown that the low parametric frequency excitation triggers the existence of periodic bursters in vicinity of the boundaries between the different dynamics of the arch. © Springer international Publishing AG 2018.

关键词： Arches

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Tailoring of hysteresis across different material scales 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

作者： Lacarbonara, Walter Talò, Michela Carboni, Biagio Lanzara, Giulia Department of Structural and Geotechnical Engineering Sapienza University of Rome Via Eudossiana 18 Rome00184 Italy Department of Engineering University of RomeTre Via Vito Volterra 62 Rome00146 Italy

ISBN: (数字)9783319639376

ISBN: (纸本)9783319639369

Hysteresis is discussed as a multi-scale material feature that can strongly affect the dynamic performance of a structure. It is shown that the hysteresis exhibited by assemblies of short wire ropes can be tailored via a synergistic use of different dissipation mechanisms (inter-wire frictional sliding, phase transformations) combined with geometric nonlinearities. the blend of material and geometric nonlinearities is a powerful and promising way to design new advantageous types of hysteretic responses in macro- or micro-scale devices and structures. Indeed, moving from macro-scale structures towards much smaller material scales, carbon nanotubes in nanocomposites are shown to dissipate energy through stick-slip with the polymer chains. the hysteresis of these materials can be largely modified and optimized by adjusting the micro-structural constitutive features. Recent experimental and modeling efforts are discussed in the context of new directions in material design and dynamic behavior of nanocomposites. © Springer international Publishing AG 2018.

关键词： Hysteresis

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Exploring the nonlinear stochastic dynamics of an orchard sprayer tower moving through an irregular terrain 1

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4th international conference on structural nonlinear dynamics and diagnosis, csndd 2016

作者： Cunha, Americo Felix, Jorge Luis Palacios Balthazar, José Manoel Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Federal da Fronteira Sul Chapecó Brazil Instituto Tecnológico de Aeronáutica São José dos Campos Brazil

ISBN: (数字)9783319639376

ISBN: (纸本)9783319639369

In agricultural industry, the process of orchards spraying is of extreme importance to avoid losses and reduction of quality in the products. In orchards spraying process an equipment called sprayer tower is used. It consists of a reservoir and fans mounted over an articulated tower, which is supported by a vehicle suspension. Due to soil irregularities this equipment is subject to random loads, which may hamper the proper dispersion of the spraying fluid. this work presents the construction of a consistent stochastic model of uncertainties to describe the non-linear dynamics of an orchard sprayer tower. In this model, the mechanical system is described by as a multi-body with three degrees of freedom, and random loadings as a harmonic random process. Uncertainties are taken into account through a parametric probabilistic approach, where maximum entropy principle is used to specify random parameters distributions. the propagation of uncertainties through the model is computed via Monte Carlo method. © Springer international Publishing AG 2018.

关键词： Stochastic models

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