The Multi-Body Dynamics Analysis and Experiment of Long Distance Steel Belt Transmission

2014 ◽  
Vol 971-973 ◽  
pp. 816-822
Author(s):  
Zhi Ping Chen ◽  
En Dao Xu ◽  
Zhen Jie Zhang ◽  
Shuai Mou ◽  
Shi Feng Yue ◽  
...  
Keyword(s):  
Stress And Strain ◽  
Body System ◽  
Long Distance ◽  
Sliding Motion ◽  
Body Dynamics ◽  
Coupling Dynamics ◽  
Belt Transmission ◽  
Multi Body ◽  
The Relationship ◽  
Element Theory

This paper establishes the dynamic model of the long distance steel belt friction transmission with multi-body system rigid-flexible coupling dynamics theory, employs the boundary element theory to research the setting of the boundary conditions, and then improve the reliability of the simulation and calculation. This paper simulates and analyzes the relationship between pre-load and load,as well as that between stress and strain,so that gets the better transmission accuracy. Starting with experiment, this paper researches on the tension characteristics, running deviation and transmission accuracy of the long distance steel belt. by comparing the result of the simulation, this paper obtains the fitting function of the pre-load of the long distance steel belt and proves it have high transmission accuracy under certain condition which has proper pre-load and load.The experiment shows that the home-made precision friction transmission testbed has the ability of precision transmission. Taking advantage of the friction transmission features of steel belt, it can solve the low transmission accuracy of conventional belt transmission which results from small Elastic modulus and big elasticity sliding motion, and fulfills the long distance friction transmission on the engineering, the deviation can be smaller than 0.5%.

Joint Modeling and Simulation of the Spindle System of Hammer Crusher Based on Finite Element Analysis and Flexible Multi-Body Dynamics. Part1: Modeling

2012 ◽  
Vol 630 ◽  
pp. 291-296
Author(s):  
Yu Wang ◽  
En Chen ◽  
Jun Qing Gao ◽  
Yun Feng Gong
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
System Simulation ◽  
Geometric Model ◽  
Body System ◽  
Element Analysis ◽  
Spindle System ◽  
Body Dynamics ◽  
Multi Body ◽  
The Impact

In the past finite element analysis (FEA) and multi-body system simulation (MBS) were two isolated methods in the field of mechanical system simulation. Both of them had their specific fields of application. In recent years, it is urgent to combine these two methods as the flexible multi-body system grows up. This paper mainly focuses on modeling of the spindle system of hammer crusher, including geometric model, finite element model and multi-body dynamics (MBD) model. For multi-body dynamics modeling, the contact force between hammer and scrap steel was discussed, which is important to obtain the impact force. This paper also proposed how to combine FEA and MBS to analyze the dynamic performance of the spindle system by using different software products of MSC.Software.

Simulation Research on Braking Safety Properties of Aircraft Traction System

2009 ◽  
Vol 419-420 ◽  
pp. 705-708 ◽  
Author(s):  
Neng Jian Wang ◽  
Li Jie Zhou ◽  
Qiang Song ◽  
De Fu Zhang
Keyword(s):  
Critical Conditions ◽  
Safety Properties ◽  
Simulation Research ◽  
Straight Line ◽  
Body Dynamics ◽  
Braking Torque ◽  
Traction System ◽  
Multi Body ◽  
Dynamics Models ◽  
The Relationship

The jack-knifing tendency of aircraft traction system during braking was discussed and analyzed using multi-body dynamics models that consist of aircraft-towing tractor, aircraft draw link and aircraft. The braking critical conditions of the aircraft traction system for straight-line braking and turning braking were discussed and analyzed respectively. In the case of straight-line braking, the effect of friction coefficient on the maximum braking torque is described. In the case of turning braking, the relationship between the maximum baking torque and relative angle is obtained.

Methods & Prospects of Research on Flexible Multi-Body Dynamics

2013 ◽  
Vol 353-356 ◽  
pp. 3284-3287
Author(s):  
Lin Xiao Yao ◽  
Lian Yang ◽  
Lin Jian Shangguan
Keyword(s):  
Numerical Calculation ◽  
Vibration Control ◽  
Research Method ◽  
Dynamical Equation ◽  
System Model ◽  
Body System ◽  
Body Dynamics ◽  
System Vibration ◽  
Three Stages ◽  
Multi Body

This paper summarized the research method of flexible multi-body system dynamics. Three stages of flexible multi-body system model are reviewed. The paper is especially summary on modeling method of flexible multi-body system, flexible multi-body dynamical equation numerical calculation and flexible multi-body system vibration control and so on. And the paper is looked forward to further study.

Optimum Design of Local Cam Profile of a Valve Train

2010 ◽  
Vol 224 (11) ◽  
pp. 2487-2492 ◽  
Author(s):  
W J Qin ◽  
J Q He
Keyword(s):  
System Dynamics ◽  
Valve Train ◽  
Dynamic Responses ◽  
Dynamics Simulation ◽  
Body System ◽  
Dynamics Model ◽  
Adams Software ◽  
Cam Profile ◽  
Multi Body ◽  
The Relationship

In this paper, optimization of the local cam profile of a valve train modelled by a parameterized Bezier curve is described. Dynamic responses of the valve train are simulated through its multi-body system dynamics model built using ADAMS software. The kriging method is used to build the surrogate model, which presents the relationship between dynamic responses resulting from the multi-body system dynamics simulation and the parameters of the local Bezier profile. The local cam profile is optimized through a generic algorithm, such that the acceleration peak at the valve open phase is reduced significantly.

Simulation and Study on Ride Comfort of Articulated Dump Truck Based on Rigid-Flex Coupling

2014 ◽  
Vol 494-495 ◽  
pp. 55-58
Author(s):  
Jie Guo
Keyword(s):  
Finite Element ◽  
Ride Comfort ◽  
Dynamic Theory ◽  
Dynamics Simulation ◽  
Dump Truck ◽  
Body System ◽  
Finite Element Software ◽  
Body Dynamics ◽  
Set Up ◽  
Multi Body

For the poor ride comfort performance of the articulated dump truck, the dynamic model of ADT was built and its dynamic characteristics were also studied through finite element and multi-body system dynamic theory. According to the modal neutral file generated by finite element software with the flexible processing, the flexible coupling virtual prototyping model was set up for the multi-body dynamics simulation in ADAMS to obtain and analyze the data about the ADT ride comfort. This paper provided references for the design, redesign and optimization of the ADT.

scholarly journals Numerical Investigation on Handling Stability of a Heavy Tractor Semi-Trailer under Crosswind

2020 ◽  
Vol 10 (11) ◽  
pp. 3672 ◽  
Author(s):  
Qianwen Zhang ◽  
Chuqi Su ◽  
Yi Zhou ◽  
Chengcai Zhang ◽  
Jiuyang Ding ◽  
...  
Keyword(s):  
Lateral Displacement ◽  
Aerodynamic Characteristics ◽  
Lateral Acceleration ◽  
Yaw Rate ◽  
Body Dynamics ◽  
Crosswind Stability ◽  
Computational Fluid Dynamics Cfd ◽  
Multi Body ◽  
The Relationship ◽  
Lateral Area

Due to the large lateral area of the trailer and variable road conditions, the handling stability of a heavy tractor semi-trailer under crosswind is very important for road safety. In this present work, numerical simulation is performed to study the crosswind effects on handling stability of a tractor semi-trailer. The aerodynamic characteristics of the tractor semi-trailer under different crosswind were computed by computational fluid dynamics (CFD). Then, mathematical models to reveal the relationship between the aerodynamic forces and crosswind were constructed to serve as inputs of the multi-body dynamics to analyze the handling stability under crosswind. The performance of crosswind stability is evaluated by the response of lateral acceleration, yaw rate and the lateral displacement. The lateral acceleration and yaw rate were decreased by a maximum of 14.6% and 16.5% compared to the truck without the deflector, which showed that the crosswind aerodynamics and stability were obviously improved.

Experiment on Dynamics of the Hybrid Polishing Kinematics Machine Tool with Clearance Based on the Flexible Multi-Body Systems

2007 ◽  
Vol 359-360 ◽  
pp. 533-537
Author(s):  
Miao Yu ◽  
Yuan Ming Zhang
Keyword(s):  
Machine Tool ◽  
Parallel Mechanism ◽  
Influence Factor ◽  
Free Form ◽  
Body System ◽  
Shock Effect ◽  
Kinematics Model ◽  
Body Dynamics ◽  
Multi Body ◽  
Free Form Surfaces

This paper develops a novel five DOF hybrid polishing kinematics machine tool in order to obtain more stable machining result in the elastic polishing on the free-form surfaces. Because the machine tool is a complex multi-body system that comprises many close-loop structures, jointing clearance becomes the important influence factor to its moving stability. The unified rigid multi-body and flexible multi-body dynamics equation of for the parallel mechanism of hybrid polishing kinematics machine tool is respectively built, which considers the influence of joint with clearance and applies the kinematics model of Newton second state. The result of analysis shows that the moving stability of the hybrid polishing kinematics machine tool is reduced due to the existing jointing clearance. However, the interior flexibility of the mechanism can reduce the shock effect of collision in the part of motion pair. It can improve the working stability of mechanism.

DYNAMICS MODELING AND SIMULATION OF A KIND OF WHEELED HUMANOID ROBOT BASED ON SCREW THEORY

2012 ◽  
Vol 09 (04) ◽  
pp. 1250029 ◽  
Author(s):  
JINGGUO WANG ◽  
YANGMIN LI
Keyword(s):  
Humanoid Robot ◽  
Screw Theory ◽  
Kinematics And Dynamics ◽  
Variation Principle ◽  
Dynamics Modeling ◽  
Modeling Methodology ◽  
Body Dynamics ◽  
Simulation Results ◽  
Multi Body ◽  
The Relationship

Based on the screw theory and Lie group notations, this paper presents a modeling method for a kind of wheeled humanoid robot whose upper human-like body is mounted on the top of a mobile platform with three wheels. By combining the reciprocal product of the twist and wrench with Jourdain variation principle, a general formulation method is proposed to model the whole system's dynamics that represents directly the relationship between the input and the resultant external and inertial wrench. Both the system kinematics and dynamics are derived carefully. The simulations are made to verify the proposed modeling methodology and the simulation results are also compared with the results obtained from the multi-body dynamics software.

Spatial Error Modeling and Analysis of the Glass Fillet Machine Based on the Multi-Body System Theory

2014 ◽  
Vol 988 ◽  
pp. 324-327
Author(s):  
Shui Ping Li ◽  
Qian Qiu ◽  
Ya Li Yuan
Keyword(s):  
Error Analysis ◽  
Error Modeling ◽  
Grinding Wheel ◽  
Body System ◽  
Machining Error ◽  
Spatial Error ◽  
Modeling And Analysis ◽  
Space Error ◽  
Multi Body ◽  
The Relationship

Research on spatial error modeling of the glass fillet machine is introduced based on the basic principles of multi-body system kinematics. Firstly, the topological structure and the low-order body arrays are described on the basis of the mechanical structure. Then, the spatial error analysis is carried out based on the theory of multi-body system. At the same time, the transformation matrix between the adjacent typical bodies is written. After that, in order to illustrate the relationship between the grinding wheel and the grinding point, the space error model of the glass fillet machine is established, which explains the effect of spatial structure on machining error and the calculation method of machining error. This model is easy to analyze the error and embodies the superiority on the error analysis and correction. Thus it provides a kind of ideal technique for the precision analysis of the glass fillet machine.

Research on Brake Shoe Eccentric Wear Mechanism by Analytical Method and Virtual Experiment

2014 ◽  
Vol 620 ◽  
pp. 318-323 ◽  
Author(s):  
Bao Zhang Qu ◽  
Hong Bo Zhang ◽  
Bi Hong Lu ◽  
Zhen Ming Liu
Keyword(s):  
Theoretical Basis ◽  
Virtual Experiment ◽  
Dynamics Model ◽  
Brake Shoe ◽  
Railway Freight ◽  
Body Dynamics ◽  
Coupling Dynamics ◽  
Research Outcome ◽  
Set Up ◽  
Multi Body

In this paper, a theoretical mechanical model for the brake shoe is set up according to the foundation brake unit of railway freight cars, and it indicates that the friction moment is the origin resulting in brake shoe eccentric wear. On this basis, the pressure distribution formula on the brake shoe is derived when the train brakes in forward and backward direction respectively. The analysis results show that if the wheel and the brake shoe are concentric, the ratio of the revolving-in end pressure to the revolving-out end pressure in wheel forward revolving is larger than that in wheel backward revolving. It is consistent with the phenomena that upper eccentric wear often appears on the brake shoe in practice. Further research reveals that the degree of the eccentric wear is determined by the braking force action style, which is the theoretical basis for the design revision. In addition, the RecurDyn Multi-body Dynamics software is used to build the rigid-flexible coupling dynamics model for the foundation brake unit. The simulation experiment verified the analysis result. The research outcome provides the theoretical basis and technical support for further design improvement of the foundation brake unit in railway freight cars.

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