A Cloth Simulation Method for Cloth/ Machinery Coupled System Unified Modeling

2010 ◽  
Vol 37-38 ◽  
pp. 1-4
Author(s):  
Hai Yan Yu ◽  
Yong Xing Wang ◽  
Sheng Ze Wang ◽  
Zhao Feng Geng
Keyword(s):  
Coupled System ◽  
Simulation Method ◽  
Rigid Bodies ◽  
Simulation Software ◽  
Mechanical Modeling ◽  
Cloth Simulation ◽  
Unified Modeling ◽  
Mechanical Simulation ◽  
Cloth Modeling ◽  
Integrated Concept

In some textile machines, fabric is an inseparable element for motion and force transmitting. But the existing mechanical simulation software cannot model the fabric. This paper proposes a new cloth simulation method by blurring machinery (rigid) and cloth (soft) boundaries. This approach simulates the soft with tiny rigid bodies, large deformation with small ones. It aims to integrate the cloth modeling to the mechanical simulation system. Finally, we establish a cloth simulation model on the mechanical modeling and simulation platform, which is an embodiment of our integrated concept.

Cloth Modeling Simulation Based on Mass Spring Model

2013 ◽  
Vol 310 ◽  
pp. 676-683 ◽  
Author(s):  
Jian Dong Yang ◽  
Shu Yuan Shang
Keyword(s):  
Physical Model ◽  
Simulation Method ◽  
Spring Model ◽  
Cloth Simulation ◽  
Modeling Simulation ◽  
Simulation Based ◽  
Mass Spring Model ◽  
Crucial Problem ◽  
Cloth Modeling ◽  
Mass Spring

The crucial problem in cloth simulation based on Physical model is how to solve the motion differential equations. Mass spring model is ideal and it is widely used in cloth simulation. The simulation technology of cloth modeling based on mass spring model is presented completely, fabric mechanics models are established precisely, and several kinds of explicit numerical integration are compared in detail, especially, using RK-4 method can greatly improve system’s stability. This cloth simulation method is applied to cloth software. Examples have proved that this method is advanced and practical.

Numerical Simulation Method Ascertaining Slope Stabilization Anti-Slippery Pile's Basic Parameters

2012 ◽  
Vol 594-597 ◽  
pp. 222-225
Author(s):  
Wen Juan Feng ◽  
Xiao Dong Ju ◽  
Zheng Sheng Zou
Keyword(s):  
Numerical Simulation ◽  
Safety Factor ◽  
Limit Equilibrium ◽  
Simulation Method ◽  
Simulation Software ◽  
Strength Reduction ◽  
Slope Stabilization ◽  
Limit Equilibrium Methods ◽  
Basic Parameters ◽  
Shear Strength Reduction

Although anti-slide pile take a key position in slope-treating measures, the method of designing is far from perfect. The methods used in actual projects are based on the rigid body limit equilibrium methods. There is a tendency to using numerical methods in the progress of pile-designing. The safety factor of landslide is calculated according to shear strength reduction theory in the numerical simulation software. Using the shearing forces on pile and the safety factor can ascertain the position of anti-slide piles, the area and distance of piles. For numerical simulation can well perform the simulation slope moving and the load on piles and can give a more reasonable designing.

scholarly journals Traffic queue modeling using arena simulation software (a case study of Mergan 4-Way intersection in Malang City)

2018 ◽  
Vol 204 ◽  
pp. 02009 ◽  
Author(s):  
Dani Yuniawan ◽  
P.P Aang Fajar ◽  
Samsudin Hariyanto ◽  
Romi Setiawan
Keyword(s):  
Flow System ◽  
Simulation Method ◽  
Simulation Software ◽  
Verification And Validation ◽  
Scenario Simulation ◽  
Traffic Light ◽  
Simulation Scenario ◽  
Research Outcome ◽  
Arena Simulation

Currently Mergan 4-way intersection is one of intersection that have most traffic dense in Malang City, East Java - Indonesia. This research implement simulation method in order to give several solution option to manage the traffic queue in Mergan 4-way intersection. Simulation method is conducted with several phase, from problem identification up to verification and validation also scenario simulation. Arena Simulation software v.14 is chosen as the tool to modeling the traffic queue line. The research outcome give several solution through Traffic Light 2 simulation scenario. With this simulation scenario, the traffic flow system simulation can be run with fewer queues of vehicles.

scholarly journals A Simulation Model for Computing the Loads Generated at Landing Site During Helicopter Take-Off or Landing Operation

2019 ◽  
Vol 2019 (2) ◽  
pp. 59-75
Author(s):  
Jarosław Stanisławski
Keyword(s):  
Equations Of Motion ◽  
Landing Site ◽  
Simulation Method ◽  
Rigid Bodies ◽  
Landing Gear ◽  
Rotor Blades ◽  
Wind Gust ◽  
The Galerkin Method ◽  
Lumped Masses ◽  
And Control

Summary The paper presents simulation method and results of calculations determining behavior of helicopter and landing site loads which are generated during phase of the helicopter take-off and landing. For helicopter with whirling rotor standing on ground or touching it, the loads of landing gear depend on the parameters of helicopter movement, occurrence of wind gusts and control of pitch angle of the rotor blades. The considered model of helicopter consists of the fuselage and main transmission treated as rigid bodies connected with elastic elements. The fuselage is supported by landing gear modeled by units of spring and damping elements. The rotor blades are modeled as elastic axes with sets of lumped masses of blade segments distributed along them. The Runge-Kutta method was used to solve the equations of motion of the helicopter model. According to the Galerkin method, it was assumed that the parameters of the elastic blade motion can be treated as a combination of its bending and torsion eigen modes. For calculations, data of a hypothetical light helicopter were applied. Simulation results were presented for the cases of landing helicopter touching ground with different vertical speed and for phase of take-off including influence of rotor speed changes, wind gust and control of blade pitch. The simulation method may help to define the limits of helicopter safe operation on the landing surfaces.

The Study on Production Performances of Part Transporter in Flexible Manufacturing System by Using Simulation Method

2012 ◽  
Vol 576 ◽  
pp. 714-717
Author(s):  
Mohammad Iqbal ◽  
Muhammad Ridwan Andi Purnomo ◽  
Muhammad Ammar Bin Mohd Imra ◽  
Mohamed Konneh ◽  
A.N. Mustafizul Karim
Keyword(s):  
Waiting Time ◽  
Flexible Manufacturing ◽  
Material Handling ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
Arrival Rate ◽  
Simulation Method ◽  
Simulation Software ◽  
Average Waiting Time ◽  
Processing Times

Material handling is one of major components in Flexible Manufacturing System (FMS). Any improvement of material handling capability is to affect the performance of the whole system. This paper discusses the simulation study on the effect of part arrival rate and dispatching rules to the average waiting time and production rate of the FMS. The facilities of the system were modeled into simulation environment by using Arena Simulation Software. The production parameters such as machine processing times, part transportation speed and type of products were put into the model to represent the behaviors of the real system. Two rules have been considered in the study, i. e. first come first served (FCFS), and shortest processing time (SPT). Average waiting time and productivity were taken into account as performance measures of the system. The result of the study showed that SPT rule gives shorter average waiting time and higher productivity. Based on this result, the SPT rules would be used to control part transporter in order to have a better performance of the FMS.

Simulation on 3D Computer Dynamic Cloth Simulation Process

2013 ◽  
Vol 380-384 ◽  
pp. 1585-1588
Author(s):  
Chen Shen ◽  
Min Ying Zong
Keyword(s):  
Simulation Method ◽  
Experimental Results ◽  
3D Simulation ◽  
Particle Model ◽  
Simulation Algorithm ◽  
Cloth Simulation ◽  
Development Platform ◽  
Simulation Process ◽  
Moving Particle

In the process of complex cloth modelling, the cloth tissues mobile disorderly, resulting in ineffective modeling and other problems. To address the problems mentioned above, a corresponding solution is put forward. Based on the HLA development platform and Vega development platform, a 3D cloth simulation method which improves the simulation algorithm of annealing is proposed. Some related processings are performed on the cloth image, and the moving cloth issues are simulated using the improved fast cloth moving particle model to complete 3D simulation of the cloth. Experimental results show that this method can describe the complex cloth issues accurately, quickly and completely, and achieves desirable results.

An Analysis of Electric Inertia Simulation Method on the Test Platform of Electric Bicycle Brake Force

2014 ◽  
Vol 989-994 ◽  
pp. 3335-3339
Author(s):  
Zhao Xu Yu ◽  
Hong Bin Yu
Keyword(s):  
Simulation Method ◽  
Electrical Simulation ◽  
Mechanical Simulation ◽  
Test Platform ◽  
Electric Bicycle ◽  
Brake Force ◽  
Braking Process ◽  
The One ◽  
The Relationship ◽  
Better Than

This paper analyzes the electric inertia simulation method deeply. By analyzing the brake torgue in the braking process, this paper makes a conclusion about the relationship between the moter’s torgue in the braking process and the simulation of inertia. The test uses the method of combining the mechanical simulation and electrical simulation. In this method, it invites the test platform of electric bicycle brake force, and realizes the inertia simulation. On the test platform, the results showed: by using the electric inertia simulation, the performance of the system is obviously better than the one on the test platform which using flywheel groups. This method improves the degree of automation on the test platform.

Tolerance Simulation of Thin-Walled C-Section Composite Beam in Wingbox Assembly Under Preloading

2015 ◽  
Author(s):  
Hua Wang ◽  
Jun Liu
Keyword(s):  
Probability Distribution ◽  
Composite Beam ◽  
Composite Structures ◽  
Simulation Method ◽  
Simulation Software ◽  
Fea Model ◽  
Final Assembly ◽  
Thin Walled ◽  
Thickness Variations ◽  
Induced Changes

Tolerance simulation’s reliability depends on the concordance between the input probability distribution and the practical situation. Pre-loading induced changes in the probability distribution should be considered in the structure’s tolerance simulation, especially for composite structures. The paper presents a tolerance simulation method for the thin-walled C-section composite beam (TC2B) assembling under preloading, that is prescribed clamping force. Based on FEA model of TC2B, the preloading-modified probability distribution function of the R angle spring-in deviation is proposed. Thickness variations of the TC2B are obtained from the data of the downscaled composite wingbox. These parts’ variations are input to the tolerance simulation software, and the final assembly variations are obtained. The assembly of the downscaled wingbox illustrates the effect of preloading on the probability distribution of the R angle spring-in deviation. The results have shown that tolerance simulation with the modified probability distribution is more accurate than the initial normal distribution. The tolerance simulation work presented in the paper will enhance the understanding of the composite parts assembling with spring-in deviations, and help systematically improving the precision control efficiency in civil aircraft industry.

The Co-Simulation Study on Electronic Unit Pump Diesel in Mechanical Engineering

2013 ◽  
Vol 644 ◽  
pp. 317-320
Author(s):  
Chang Xi Ji ◽  
Yu Rong Jiang ◽  
En Zhe Song ◽  
Mei Liang Yin ◽  
Jun Sun
Keyword(s):  
Diesel Engine ◽  
Theoretical Basis ◽  
Theoretical Study ◽  
Simulation Method ◽  
Simulation Software ◽  
Electronic Unit ◽  
Matlab Simulink ◽  
Simulink Simulation ◽  
Electronic Unit Pump ◽  
Simulation Results

This paper establishes the simulation model of the electronic unit pump diesel engine with Matlab/Simulink and AMESim. Provide a theoretical basis for the study of electronic unit pump diesel. The diesel model is built with Matlab/Simulink simulation software and the electronic unit pump is constructed in AMESim environment. To evaluate the model, a co-simulation method with AMESim/Simulink is used. The simulation results show the model is available. And it is significant in theoretical study of electronic unit pump diesel.

scholarly journals Theory of Second Order Numerical Simulation Method of Enhanced Oil Production

2019 ◽  
Vol 11 (2) ◽  
pp. 73
Author(s):  
Yirang Yuan ◽  
Aijie Cheng ◽  
Danping Yang ◽  
Changfeng Li
Keyword(s):  
A Priori Estimates ◽  
A Priori ◽  
Oil Production ◽  
Coupled System ◽  
Simulation Method ◽  
Second Order ◽  
Optimal Order ◽  
Difference Operators ◽  
Order Error ◽  
L2 Norm

A kind of second-order implicit upwind fractional steps finite difference method is presented in this paper to numerically simulate the coupled system of enhanced (chemical) oil production in porous media. Some techniques, such as the calculus of variations, energy analysis method, commutativity of the products of difference operators, decomposition of high-order difference operators and the theory of a priori estimates are introduced and optimal order error estimates in l2 norm are derived.

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