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检索条件"任意字段=International Conference on Applied Nonlinear Dynamics, Vibration, and Control, ICANDVC 2023"

共 732 条记录，以下是51-60 订阅

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Analytical Analysis of nonlinear Vortex-Induced vibration of Pipes Conveying Fluid

Analytical Analysis of Nonlinear Vortex-Induced Vibration of...

引用

international conference on applied nonlinear dynamics, vibration, and control, icandvc 2023

作者： Liu, Jian Wang, Yu College of Aerospace and Civil Engineering Harbin Engineering University Harbin150001 China

ISBN: (纸本)9789819705535

In this paper, the vortex-induced vibrations of a long flexible pipe conveying steady fluid are investigated via a two-mode discretization of the governing differential equations. The governing nonlinear partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs) by applying the Galerkin’s method, which are then studied numerically for the pipe with primary resonances during lock-in for each of the first two modes. The method of multiple scales is utilized to obtain the steady-state responses of the coupled equations. It is found that the frequency-amplitude relationships present typical nonlinear phenomena, including jumping and multi-value. Numerical integrations are directly implemented in the vibration equations to verify the aforementioned analytical results. Furthermore, an analytical expression that predicts the lock-in phenomenon range of external fluid velocity is derived. The influences of the velocity of internal and external fluids on the dynamical characteristics are discussed in detail. It is shown that the values of the external fluid velocity triggering the start and stop of the lock-in phenomenon will change with the value of the internal fluid velocity of the pipe. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Conveying

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Adaptive Fuzzy Decentralized Dynamic Surface control for Fractional-Order nonlinear Large-Scale Systems

Adaptive Fuzzy Decentralized Dynamic Surface Control for Fra...

引用

international conference on applied nonlinear dynamics, vibration and control, icandvc 2021

作者： Zhan, Yongliang Li, Yongming Tong, Shaocheng Liaoning University of Technology Jinzhou121001 China

ISBN: (纸本)9789811659119

In this paper, we study the adaptive fuzzy decentralized control problem for the fractional-order nonlinear large-scale systems in strict-feedback form. The controlled systems contain unknown nonlinearities. In the process of recursive design, the global approximation ability of fuzzy logic systems (FLSs) are utilized to cope with the unknown nonlinear continuous functions of the considered systems. In addition, in order to avoid the issue of "explosion of complexity" inherent in the traditional backstepping control design technique, the dynamic surface control (DSC) technique is introduced into the control design. Under the frameworks of the backstepping control design technique, DSC technique and adaptive fuzzy decentralized control theory, an adaptive fuzzy decentralized DSC scheme is put forward. On the basis of the fractional-order Lyapunov stability theory, it is confirmed that all the signals in the controlled systems are bounded and the tracking errors are able to converge to a small neighborhood of the origin. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Decentralized control

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Mixed H∞/passive vibration control for nonlinear Active Suspension of In-Wheel Motor Driven Electric Vehicles Subject to Finite-Time State Constraint and Input Saturation

Mixed H∞/passive Vibration Control for Nonlinear Active Sus...

引用

international conference on applied nonlinear dynamics, vibration and control, icandvc 2021

作者： Wang, Gang Huang, Chunyue Jing, Hui School of Mechanical and Electrical Engineering Guilin University of Electronic Technology Guilin541004 China

ISBN: (纸本)9789811659119

This paper proposes a novel mixed H∞/passive vibration control approach for active suspension of in-wheel motor electric vehicles. To mitigate the negative effects caused by the electromagnetic excitation of the switched reluctance motor and the shock road disturbance, a robust controller with a mixed H∞/passive performance is developed based on finite-time stability method. A stabilization condition is given in terms of Bilinear Matrix Inequalities (BMIs) based on Lyapunov method. Then, some decoupling methods are utilized to cast the nonlinear feasibility problem into a linear feasibility problem with the framework of Linear Matrix Inequalities (LMIs). Finally, the proposed active control method is compared with a traditional passive control method. The comparison results indicate that all the concerned requirements are improved by the proposed active suspension. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Linear matrix inequalities

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Research on a Limited NES with Forced vibration

Research on a Limited NES with Forced Vibration

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international conference on applied nonlinear dynamics, vibration and control, icandvc 2021

作者： Geng, Xiao-Feng Ding, Hu Mao, Xiao-Ye Chen, Li-Qun Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering Science Shanghai University Shanghai200072 China

ISBN: (纸本)9789811659119

For the application and research of the nonlinear energy sink (NES), the vibration of the NES is generally not restricted. However, the vibration amplitude of the NES may be greatly excited, which is unacceptable in engineering. A limited NES consisting of a conventional NES and a piecewise spring is investigated to restrict the vibration of the NES. The effects of the piecewise stiffness and the gap on the dynamic response of the primary system and the NES are considered in forced vibration. The piecewise function is fitted into a continuous function to obtain the nonlinear vibration responses with harmonic balance method. Then the results are verified wtih the Runge-Kutta method. The results show that the piecewise stiffness has a good performance on limiting the NES. Although the introduction of the piecewise spring will weaken the damping effect of the NES on the primary system, the NES obtain a considerable damping effect with proper parameters. In a word, this work provides a simple and reliable method to restrict the NES, which is beneficial to the design of the NES and broadening the application of the NES in engineering. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Runge Kutta methods

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Time-Optimal Anti-swing Trajectory Planning of Double Pendulum Crane Based on Chebyshev Pseudo-spectrum Method

Time-Optimal Anti-swing Trajectory Planning of Double Pendul...

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international conference on applied nonlinear dynamics, vibration, and control, icandvc 2023

作者： Zhong, Ken Qian, Yuzhe School of Artificial Intelligence Hebei University of Technology Tianjin China

ISBN: (纸本)9789819705535

As a typical underdrive system, an overhead crane has been widely used in modern industrial production and transportation. However, when the load volume in the crane system is too large or the hook quality is too large, the bridge crane system will show the characteristics of double-pendulum, increasing the difficulty of control. Based on this, this paper proposes a time-optimal trajectory planning method for the double-pendulum bridge crane system, which can be obtained. Specifically, the paper first transforms the system kinematics model;based on this basis Then, considering the various constraints including the two-level swing angle and the trolley speed and acceleration limit, the optimization problem is transformed into a nonlinear programming problem which is easier to solve, and the trajectory constraints can be considered very conveniently in the conversion process. Solving the nonlinear programming problem yields the time-optimal trolley trajectory. Finally, the simulation results show that the time-optimal trajectory planning method has satisfactory control performance. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： nonlinear programming

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Response Analysis of a Rotating Tapered Beam

Response Analysis of a Rotating Tapered Beam

引用

international conference on applied nonlinear dynamics, vibration and control, icandvc 2021

作者： Wang, Dan Hao, Zhifeng Chen, Yushu Wiercigroch, Marian School of Mathematical Sciences University of Jinan Jinan250022 China College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China School of Astronautics Harbin Institute of Technology Harbin150001 China Centre for Applied Dynamics Research School of Engineering University of Aberdeen King’s College United Kingdom

ISBN: (纸本)9789811659119

The vibration characteristics of a rotating tapered beam under the excitation of wake flows are considered. The governing equation of the beam is obtained and discretized to a set of ordinary differential equations by using the Galerkin’s method. The coupled vibrations for the first two modes of the beam are investigated. The effects of system parameters such as the taper ratio, the non-dimensional frequency ratio and radius on the first two natural frequencies of the vibrations are studied. Moreover, the vibration responses and stabilities of the coupled system are studied under the 1:1 primary resonance. And the relations between the amplitude of the vibration for the first mode and the parameters including the detuning parameter, the non-dimensional frequency ratio as well as the damping coefficient are investigated for different taper ratios. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Natural frequencies

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A Novel Bio-Inspired Polygon-Shaped Passive vibration Isolator

A Novel Bio-Inspired Polygon-Shaped Passive Vibration Isolat...

引用

international conference on applied nonlinear dynamics, vibration and control, icandvc 2021

作者： Tian, Yishen Jing, Xingjian The Hong Kong Polytechnic University Hong Kong Harbin Institute of Technology Harbin China

ISBN: (纸本)9789811659119

A bio-inspired ceil-like structure which can be considered as a pentagon-shaped structure is investigated for understanding and exploring its nonlinearity to achieve vibration isolation in multi-direction. Firstly, the model of low dynamic and high static vibration isolator is established, and the relevant system parameters are designed based on the equations of equivalent restoring force and stiffness of the system. Then the dynamic equations of the system are deduced and established. The natural frequencies of configurations with different connections of spring are studied and the dynamic response harmonic base excitation is derived. And finally, the isolation performance is evaluated by deducing the displacement transmissibility of the system. Several configurations of the pentagon shaped structure are designed for different working environments. The analysis shows that the structure can present flexible stiffness and have good vibration isolation characteristics in both vertical and horizontal directions. The result will provide a novel bio-inspired solution which can potentially be employed in different engineering practices for much better vibration isolation and control for multi-direction vibration isolation. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Stiffness

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Study on Dynamic Modeling and vibration Noise Suppression Method of AUV 1

引用

international conference on applied nonlinear dynamics, vibration, and control, icandvc 2023

作者： Zhang, Kangyu Fu, Chao Lu, Kuan Zhang, Kaifu Cheng, Hui Guo, Dong School of Mechanics Civil Engineering and Architecture Northwestern Polytechnical University Xi’an710072 China Intelligent Aircraft Structural Strength and Design Institute Northwestern Polytechnical University Xi’an710072 China School of Mechanical Engineering Northwestern Polytechnical University Xi’an710072 China

ISBN: (数字)9789819705542

ISBN: (纸本)9789819705535

This paper focuses on the key technical problems of the autonomous underwater vehicle (AUV) vibration and noise reduction. The dynamic model of AUV with propeller-shaft-motor by the second Lagrange method is established. The nonlinear bearing and other connecting parts are fully considered, which is solved by Runge-Kutta method, the dynamic behavior mechanism of AUV is revealed. Taking the vibration amplitude of the shell as the cost function and according to the amplitude-frequency response characteristics of the system, the resonance changer (RC) device by parameter design is designed. The results show that the resonance response amplitude can be greatly reduced. The theoretical model of this paper reveals the dynamic response characteristics of AUV. The results can provide new improvement ideas for the optimization design of vibration and noise reduction of AUV, and have theoretical guiding significance. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Autonomous underwater vehicles

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Simultaneous vibration Absorbing and Energy Harvesting Mechanism of the Tri-Magnet Bistable Levitation Structure: Modeling and Simulation 1

引用

international conference on applied nonlinear dynamics, vibration, and control, icandvc 2023

作者： Xu, Junjie Leng, Yonggang School of Mechanical Engineering Tianjin University Tianjin300350 China

ISBN: (数字)9789819705542

ISBN: (纸本)9789819705535

This paper investigates efficient simultaneous vibration absorbing and energy harvesting utilizing a bistable electromagnetic vibration absorber (BEVA). The vibration absorber employs a tri-magnet levitation structure, where the magnetic mechanism between the cylindrical and ring magnets achieves the symmetric bistable characteristic. Furthermore, it is attached to the free end of a cantilever beam subject to transient external excitation. The equivalent model of the cantilever beam with the BEVA system is obtained by exploiting the extended Hamilton’ s principle, while the magnetic forces are derived based on the equivalent magnetic charge method. The dry friction of the BEVA and the mechanical damping of the cantilever beam are obtained by parametric identification of the experimental data for accurate numerical simulations. From the vibration attenuation and energy dissipation viewpoints, the performance of the absorber under transient excitation is assessed. It is observed that inter-well oscillations occur at certain excitation levels, while the energy dissipation efficiency of the BEVA is improved substantially compared to the intra-well oscillations. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Energy harvesting

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nonlinear vibration Characteristics and Optimization Analysis of Diaphragm Pump Mass Valves

Nonlinear Vibration Characteristics and Optimization Analysi...

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international conference on applied nonlinear dynamics, vibration and control, icandvc 2021

作者： Zhang, Jiameng Chen, Tao Li, Fangzhong Ma, Wensheng Liu, Chunchuan Chongqing Pump Industry Co. Ltd. Chongqing Machinery and Electric Co. Ltd. Chongqing400055 China College of Aerospace and Civil Engineering Harbin Engineering University Harbin150001 China Panzhihua Steel and Iron Group Corporation Panzhihua Steel and Iron Co. Ltd. Sichuan Panzhihua617067 China

ISBN: (纸本)9789811659119

In this paper, the nonlinear vibration characteristics and optimization analysis of the diaphragm pump valves are studied. Considering the coupling effect between the fluid and structures, the dynamic equations of the quality valve for the diaphragm pump is established by analyzing the force equilibrium of the quality valves. The spring preload can be obtained through analyze fluid flow between the alve lift and the structural parameters. The key parameters of quality valve for the diaphragm pump are obtained by the experimental testing data. The dynamic equation of quality valve is solved by using the fourth-order Runge-Kutta method. The nonlinear vibration characteristics of the quality valve are analyzed, and the influences of the valve clearance circumference and other structure parameters on the nonlinear vibration characteristics are also discussed. Moreover, the optimization analysis of the structural parameters for the quality valve for the diaphragm pump is conducted in order to reduce the vibration of the quality valves. The analysis model and method proposed in this article provide a new design process for quality valves of the diaphragm pump. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Quality control

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