Simulation and Research of Multiple Degree Freedom Vibration System Based on MapleSim

2013 ◽  
Vol 387 ◽  
pp. 47-50
Author(s):  
Zhen Wang ◽  
Tao Wu
Keyword(s):  
Seismic Response ◽  
Torsional Vibration ◽  
Dynamic Equation ◽  
Signal Analysis ◽  
Simulation Analysis ◽  
System Simulation ◽  
Simulation Software ◽  
Degree Of Freedom ◽  
Vibration System ◽  
Programming Process

To discuss the modeling method and simulation analysis of multiple degree of freedom vibration system by using the Maple/MapleSim simulation software, the seismic response of the ground buildings model and the torsional vibration of gear shaft model are used as examples respectively. The application of MapleSim in the process on signal analysis, extraction of the dynamic equation and solution of the natural frequency of multiple degree of freedom vibration system are expounded concretely. While the modeling speed is improved, this method also reduces the programming process and the difficulty of programming. It provides an effective reference for handling similar multiple degree of freedom vibration system simulation.

Kinematic Analysis of Shaping Machine Based on ADAMS

2014 ◽  
Vol 1049-1050 ◽  
pp. 1056-1060
Author(s):  
Jian Sun
Keyword(s):  
Simulation Model ◽  
Mechanical System ◽  
Dynamic Characteristics ◽  
Kinematic Analysis ◽  
Simulation Analysis ◽  
System Simulation ◽  
Simulation Software ◽  
Characteristics Analysis ◽  
Working Device ◽  
Dynamic Characteristics Analysis

Motion analysis was carried out on the working device of shaper. The simulation model of the Shaping machine is established based on the multi-mechanical system simulation software ADAMS. Through the simulation analysis, we can get the kinematics characteristics of each rod of shaper. In the method, simulation is authentic, visualized and convenient in measurement. The result shows that the method is efficient and useful in the kinematic and dynamic characteristics analysis of mechanism.

ADAMS-Based Vibrating Subsoiler System Simulation Analysis

2011 ◽  
Vol 128-129 ◽  
pp. 42-45
Author(s):  
Li Li Xin ◽  
Ji Hui Liang ◽  
Li Chun Qiu
Keyword(s):  
Dynamic Analysis ◽  
Mechanical System ◽  
Vibration Frequency ◽  
Simulation Analysis ◽  
System Simulation ◽  
Degree Of Freedom ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Acting Force ◽  
Advance Speed

For the vibrating subsoiler, considering the material acting force, the system is simplified as a single degree of freedom weight-spring-damp model which will simulate the vibrating subsoiler system based on Automatic Dynamic Analysis of Mechanical System (ADAMS). The analysis result shows that the vibrating subsoiler can not perform well under conditions of high vibration frequency and advance speed.

Seismic Response Reduction of the Hybrid Seismic Isolation System Based on the SMA Rubber Bearing Combined with Magneto Rheological Damper

2011 ◽  
Vol 374-377 ◽  
pp. 2543-2547
Author(s):  
Hai Qing Liu ◽  
Yao Feng Yan
Keyword(s):  
Seismic Response ◽  
Shear Deformation ◽  
Mechanical Model ◽  
Seismic Isolation ◽  
Simulation Analysis ◽  
System Simulation ◽  
Great Earthquake ◽  
Isolation System ◽  
Rubber Bearing ◽  
Magneto Rheological

The hybrid seismic isolation system , consisting of the SMA strands-laminate rubber bearing combined with magneto rheological damper ,was explored, for the sake of improving seismic isolation efect of the SMA strands-laminate rubber bearing under great earthquake ，especially when level shear deformation of SMA rubber bearing is bigger(D>0.55d) ．So does its mechanical model. In this paper，we compare the SMA strands-laminate rubber bearing with the hybrid seismic isolation system. Simulation analysis results indicate that the hybrid seismic isolation system is able to achieve both low interstory drift and acceleration and,at the same lime，limit the base displacement．The security of isolated structure was improved largely.

The Research of Marine Nuclear Power Two Loop Simulation Software Based on the Thermal System Analysis

2014 ◽  
Vol 983 ◽  
pp. 288-291
Author(s):  
Guo Lei Zhang ◽  
Xiang Dong Jin ◽  
Zhan Zhao ◽  
Zhi Jun Shi
Keyword(s):  
Nuclear Power ◽  
System Analysis ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Operating Conditions ◽  
Two Phase ◽  
Design Data ◽  
Software Optimization ◽  
Power Simulation ◽  
Basic Functions

To study of Nuclear power simulation software's basic functions and mathematical model based on thermal analysis. Describes the two-phase flow model of GSE software superiority, as well as the software optimization program .Use of software tools for normal operating conditions of the simulation calculation and analysis of the results. Comparison with design data shows that,the software use in marine nuclear power two loop system simulation analysis field, the accuracy of it is higher.

scholarly journals Feedback control for two-degree-of-freedom vibration system with fractional-order derivative damping

2017 ◽  
Vol 37 (3) ◽  
pp. 554-564
Author(s):  
Canchang Liu ◽  
Chicheng Ma ◽  
Jilei Zhou ◽  
Lu Liu ◽  
Shuchang Yue ◽  
...  
Keyword(s):  
Feedback Control ◽  
Nonlinear Vibration ◽  
Fractional Order ◽  
Suspension System ◽  
Degree Of Freedom ◽  
Vehicle Suspension ◽  
Vibration System ◽  
Fractional Order Derivative ◽  
Vehicle Suspension System ◽  
Two Degree Of Freedom

A two-degree-of-freedom nonlinear vibration system of a quarter vehicle suspension system is studied by using the feedback control method considered the fractional-order derivative damping. The nonlinear dynamic model of two-degree-of-freedom vehicle suspension system is built and linear velocity and displacement controllers are used to control the nonlinear vibration of the vehicle suspension system. A case of the 1:1 internal resonance is considered. The amplitude–frequency response is obtained with the multiscale method. The asymptotic stability conditions of the nonlinear system can be gotten by using the Routh–Hurwitz criterion and the ranges of control parameters are gained in the condition of stable solutions to the system. The simulation results show that the feedback control can effectively reduce the amplitude of primary resonance, weaken or even eliminate the nonlinear vibration characteristics of the suspension system. Fractional orders have an impact on control performance, which should be considered in the control problem. The study will provide a theoretical basis and reference for the optimal design of the vehicle suspension system.

scholarly journals Numerical Simulation Analysis of Combined Seismic Response for Rock-Lining-Water in Hydraulic Tunnel

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Guoqing Liu ◽  
Yanhong Zhang ◽  
Ming Xiao
Keyword(s):  
Numerical Simulation ◽  
Seismic Response ◽  
Simulation Analysis ◽  
Large Diameter ◽  
Water Diversion ◽  
Seismic Stability ◽  
Central Difference ◽  
Element Analysis ◽  
Internal Water ◽  
Lining Structure

In order to explore the influence of internal water on the seismic response of hydraulic tunnel, the combined mechanical analysis models of multimaterial including surrounding rock, lining structure, and internal water are built. Based on the explicit central difference method, the dynamic finite element analysis methods for rock, lining, and water are discussed, respectively. The dynamic contact force method is used to simulate the rock-lining contact interaction, and the arbitrary Lagrange-Euler (ALE) method is used to simulate the lining-water coupling interaction. Then a numerical simulation analysis method for combined seismic response of rock-lining-water system in hydraulic tunnel is proposed, and the detailed solving steps are given. This method is used to study the seismic stability characteristics of the water diversion tunnel in a hydropower station, and the displacement, stress, and damage failure characteristics of the lining structure under the conditions of no water, static water, and dynamic water are comparatively analyzed. The results show that the hydrostatic pressure restricts the seismic response of the lining, while the hydrodynamic pressure exacerbates its seismic response and leads to damage, separation, and slip failure appearing on the haunch, which can provide a scientific reference for the seismic design of hydraulic tunnel with high water head and large diameter.

Numerical Simulation Analysis of Smoke Control and Flow for Large Building Fire

2014 ◽  
Vol 608-609 ◽  
pp. 61-65
Author(s):  
Da You ◽  
Xiao Zhi Wang ◽  
Wen Jiang Chen ◽  
Gui Xiang Wu
Keyword(s):  
Numerical Simulation ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Double Precision ◽  
Actual Situation ◽  
Smoke Control ◽  
Fire Temperature ◽  
Building Fire ◽  
Engineering Software ◽  
Large Building

In fluid numerical simulation calculation, FLUENT is one of the most commonly used engineering software. By the way of pressure velocity coupling, FLUENT can solve the flow field, and use the finite volume method to speed up the convergence. In order to improve the calculation accuracy, FLUENT is divided into single precision and double precision to meet the need of practical engineering. In this paper, by using FLUENT numerical simulation software, combined with UDF programming, we analyze the temperature and smoke distribution when large building fire occurs. The GAMBIT software is used for the numerical modeling, and we use Tecplot software to carry out the post processing of results. Through numerical simulation, the fire temperature value reaches 1050K without wind, while with wind the temperature is 1030K, , which is consistent with the actual situation. In the absence of ventilation condition, concentration is 0.0112; under the condition of ventilation concentration is 0.0052, which is consistent with the actual situation. Therefore in the building fire safety, the first thing to consider is ventilation, which can reduce the fire temperature and concentration and security personnel safe evacuation.

The Optimal Control of Vehicle`s Steering and Braking System

2013 ◽  
Vol 473 ◽  
pp. 243-246
Author(s):  
Guo Li ◽  
Cheng Yao Jia ◽  
Wen Zheng Zhang
Keyword(s):  
Neural Network ◽  
Fuzzy Neural Network ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Braking System ◽  
Simulink Simulation ◽  
Neural Network Controller ◽  
Network Controller ◽  
Fuzzy Neural ◽  
The Membership Function

In order to make a research on the vehicle`s ABS and AFS system,the fuzzy neural network controller was designed on the basis of the electric vehicle`s steering and braking models. Then the genetic algorithms was used to improve the parameters of the membership function. Finally, the Matlab/Simulink simulation software has been used in the simulation analysis. The result of simulation proves that the designed system has good tracking performance and more stronger systemic robustness .

Energy Consumption Analysis on Office Building Ventilation

2012 ◽  
Vol 516-517 ◽  
pp. 1139-1143
Author(s):  
Ke Chun Sun ◽  
Wei Jun Zhang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Air Conditioning ◽  
Room Temperature ◽  
Simulation Analysis ◽  
Simulation Software ◽  
Energy Simulation ◽  
Office Building ◽  
Saving Effect ◽  
Night Ventilation

Chongqing weather conditions as the representative, energy simulation software DesT-c Chongqing office building energy simulation analysis, simulated natural building under different ventilation conditions at room temperature, the energy consumption of building cooling load and air-conditioning system changes, with an emphasis on energy-saving effect of the night ventilation; The study showed that in Chongqing reasonable use of ventilation reduce building natural room temperature to a certain extent; Sensitive indicators of building air conditioning energy consumption than the heating energy consumption of ventilation was significantly; Night ventilation when the number of ventilators is less than 5 times / h, the energy saving effect is very significant.

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