Research on Comprehensive Control of Vibration Isolation System with Flexible Foundation

2011 ◽  
Vol 55-57 ◽  
pp. 872-876
Author(s):  
De Zhen Feng ◽  
Fang Zhou ◽  
Zai Mei Zhang ◽  
Hua Guan Liu
Keyword(s):  
Power Flow ◽  
Vibration Isolation ◽  
Passive Control ◽  
Positive Control ◽  
Matrix Analysis ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Practical Engineering ◽  
Flexible Foundation ◽  
Vibrational Power Flow

The paper analyzes the dynamic relation of asymmetric multi-supported vibration isolation system with flexible foundation, establishes the comprehensive model of passive control and positive control system by using the effective matrix analysis method, analyzes the transmission mechanism and characteristic of vibrational power flow in the flexible vibration isolation system. In order to meet the need of the practical engineering, the paper analyzes and calculates the effect of the machine mass on the input and the transmission power flow in detail. At last, the paper puts forward the measure to reduce vibration energy transmission.

Dynamic Analysis of Multi-Supported Nonlinear Vibration Isolation System Mounted on Flexible Foundation

2013 ◽  
Vol 419 ◽  
pp. 223-227 ◽  
Author(s):  
Rui Huo ◽  
Hui Yu ◽  
Yan Feng Guan
Keyword(s):  
Numerical Solution ◽  
Nonlinear Vibration ◽  
Power Flow ◽  
Vibration Isolation ◽  
Engineering Application ◽  
System Dynamic ◽  
Dynamic Equations ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Flexible Foundation

In view of its prototype in engineering application, a theoretical model of multi-supported nonlinear vibration isolation system installed on flexible foundation is studied, including derivation of system dynamic equations and analysis of system dynamic characteristics. For effectiveness evaluation of nonlinear vibration isolation systems, a generalized time-averaged power is proposed as an extension of classical theory of vibratory power flow, and a numerical solution method of time-averaged power is probed accompanying with the numerical solution of nonlinear dynamic equations. In a further concrete calculation example, an air spring vibration isolation system of a small UAV engine is numerically simulated based on Runge-Kutta method, and dynamic behavior and power flow transmission characteristics influenced by system parameters are investigated.

Dynamic Analysis of Nonlinear Vibration Isolation System Based on Flexible Foundation

2014 ◽  
Vol 1030-1032 ◽  
pp. 766-769
Author(s):  
Shu Ying Li ◽  
Rui Huo ◽  
Xing Ke Cui ◽  
Cui Ping Liu ◽  
Dao Kun Zhang
Keyword(s):  
Nonlinear Vibration ◽  
Power Flow ◽  
Vibration Isolation ◽  
Low Frequency ◽  
Coupled System ◽  
Optimized Design ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Vibration Isolators ◽  
Flexible Foundation

In this paper,a general dynamic model of the isolation coupled system which is composed of isolation object,nonlinear vibration isolation support,and flexible foundation is established,calculated method of applying vibration power flow to analyze isolation effectiveness is studied.Further more,as an calculation example,a air spring vibration isolation system of HS-700 engines is numerically simulated.Designs several low-frequency nonlinear vibration isolators and analyzes its vibration isolation effect.It discusses the effect of the vibration isolator parameters on the transmitted power flow of the system.The results provide a theoretical basis for the optimized design of nonlinear vibration isolation system.

Study on Optimization Design of Hybrid Vibration Isolation System on Flexible Foundation

2005 ◽  
Author(s):  
Wei-Min Mao ◽  
Shi-Jian Zhu ◽  
Hui-Ming Jiang
Keyword(s):  
Optimization Design ◽  
Power Flow ◽  
Vibration Isolation ◽  
Design Method ◽  
System Structure ◽  
Parameter Method ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Global Sensitivity ◽  
Flexible Foundation

This article analyzes the process to design hybrid vibration isolation system on flexible foundation. The dynamic model of a hybrid vibration isolation system on flexible foundation is build and the character of power flow transmission is analyzed by sub-system structure impedance synthesis technique and four poles parameter method. The global sensitivity analysis with the Sobol’ method is used to study the global sensitivity behavior of the hybrid vibration isolation system. The multi-objective optimization design method of hybrid vibration isolation system is studied and the mathematic optimization model has been built. Gene algorithm has been used to solve the global optimization problem, and the numerical simulation is carried out.

Research on Vibration Isolation Parameters of Double-Deck Isolation System of Heat Water Pump

2013 ◽  
Vol 694-697 ◽  
pp. 316-320
Author(s):  
Xiang Jun Kong ◽  
Er Ming Song ◽  
Chang Zheng Chen
Keyword(s):  
Power Flow ◽  
Vibration Isolation ◽  
Low Frequency ◽  
Mass Effect ◽  
Transmitted Power ◽  
Intermediate Mass ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Upper Deck ◽  
Vibration Power Flow

Isolation system of the heat water pumps can be simplified as a double sources exciting and double output double-deck vibration isolation system model, expressions of transmitted power flow and vibration speed to the basement are deduced based on the double sources exciting and double output double-deck vibration isolation system electric-force(E-F) analog picture, the curves of power flow and vibration speed transmitted to basement how the upper deck vibration isolation and intermediate mass effect are drawn by using mat lab program. The results show that the adjusting the upper deck vibration isolation stiffness parameters has little effect on the amplitude of vibration power flow, increasing intermediate mass can move first peak to the low frequency, increasing intermediate mass can obviously reduce t transmitted power flow and transmitted vibration speed amplitude to the basement.

scholarly journals Parameter configuration of composite vibration isolation system using power flow and MOPSO technique

2016 ◽  
Vol 17 (5) ◽  
pp. 501 ◽  
Author(s):  
Huang Wei ◽  
Xu Jian ◽  
Zhu Da-Yong ◽  
Hu Ming-Yi ◽  
Lu Jian-Wei ◽  
...  
Keyword(s):  
Power Flow ◽  
Vibration Isolation ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Parameter Configuration

Numerical Study on the Application of Chaos in Line Spectrum Reduction

2009 ◽  
Author(s):  
Jingjun Lou ◽  
Shijian Zhu
Keyword(s):  
Power Flow ◽  
Vibration Isolation ◽  
Numerical Study ◽  
Excitation Amplitude ◽  
Point Of View ◽  
Line Spectrum ◽  
Chaotic State ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Two Degree Of Freedom

The application of chaos method in line spectrum reduction is numerically studied. The nonlinear dynamics and the power flow transmissibility of a two-degree-of-freedom vibration isolation system with nonlinear spring are analyzed. The dynamic behavior distribution chart of the system is obtained. Cascades of bifurcation of the system with different excitation amplitude are also gained. The isolation effectiveness is analyzed from the point of view of energy. The numerical results show that the reduction of the line spectrum in chaotic state is much greater than that in non-chaotic state.

An efficient method for estimating the damping ratio of a vibration isolation system

2020 ◽  
Vol 21 (1) ◽  
pp. 103 ◽  
Author(s):  
Qiang Yu ◽  
Dengfeng Xu ◽  
Yu Zhu ◽  
Gaofeng Guan
Keyword(s):  
Efficient Method ◽  
Vibration Isolation ◽  
Damping Ratio ◽  
Resonance Peak ◽  
Estimation Methods ◽  
Mathematical Relationship ◽  
Isolation System ◽  
Vibration Isolation System ◽  
At Resonance ◽  
Practical Engineering

As the damping ratio determines the response of a vibration isolation system at resonance, it is very necessary to estimate the damping ratio quickly and economically for an evaluation of the effectiveness to adjust the damping in practical engineering applications. An efficient method named the “ζ-Tr” method with the characteristics of simple operation and a high accuracy is introduced to estimate the damping ratio in this paper. According to the transmissibility curve, the specific mathematical relationship in which the value of the resonance peak corresponds to the value of the damping ratio is analysed theoretically. In this case, the recognition of the resonance peak can be used to directly estimate the damping ratio without an approximation or simplification. The “ζ-Tr” method is faster, more accurate and less costly than other estimation methods. Finally, the correctness of the “ζ-Tr” method is verified by a simulation and an experiment.

Design optimization of vibration isolation system through minimization of vibration power flow

2008 ◽  
Vol 28 (6) ◽  
pp. 677-694 ◽  
Author(s):  
Shilin Xie ◽  
Siu Wing Or ◽  
Helen Lai Wa Chan ◽  
Ping Kong Choy ◽  
Peter Chou Kee Liu
Keyword(s):  
Design Optimization ◽  
Power Flow ◽  
Vibration Isolation ◽  
Isolation System ◽  
Vibration Isolation System ◽  
Vibration Power Flow
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