Combined Finite Element and Multi-Body Dynamics Analysis of Effects of Hydraulic Cylinder Movement on Ploughbreast of Horizontally Reversible Plough

2016 ◽  
Author(s):  
Zhu Lin ◽  
Shuang-Shuang Peng ◽  
Xi Cheng ◽  
Tien-Chien Jen
Keyword(s):  
Finite Element ◽  
Maximum Stress ◽  
Hydraulic Cylinder ◽  
Uniform Motion ◽  
Dynamics Analysis ◽  
Element Analysis ◽  
Body Dynamics ◽  
Multi Body ◽  
Kinetics Of ◽  
Kinematics And Kinetics

Hydraulic Cylinder (HC), one of the key components of Horizontally Reversible Plough (HRP), takes the responsibilities for the commuting tillage of Horizontally Reversible Plough (HRP). The dynamic behaviors of HC surely affect the tillage performances. Based on our previously related work, this paper further addresses the effects of HC movements on plough-breast of HRP, especially on plough-shank, due to too much wear on it. For HC, uniform motion was considered in this study. A combined finite element analysis (FEA) and multi-body dynamics analysis (MDA) was implemented to assess both tillage kinematics and kinetics of the plough-breast. These predictions were separately focused on five different HC movement scenarios and two actual HRP tilling conditions at the maximum operation depth, i.e. 0.36m. The loading data due to the HC movements were obtained from an MDA and applied to load a finite element modal of the plough-breast. Our results show that HC movements result in the maximum stress and strain at the plough-shank. Our findings demonstrate that the movements cannot have adverse effects on the service life of the plough-breast.

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.

scholarly journals Study on the lateral and torsional vibration of single rotor-system using an integrated multi-body dynamics and finite element analysis

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096833
Author(s):  
Abdelrahman I A Eisa ◽  
Li Shusen ◽  
Wasim M K Helal
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Torsional Vibration ◽  
Rapid Development ◽  
Rotor System ◽  
Motor Speed ◽  
Element Analysis ◽  
Body Dynamics ◽  
Bearing Force ◽  
Multi Body

Due to rapid development in the industry, operating speeds and eccentricity produced undesirable vibrations which may lead to damage in bearings, seals, and lubrication systems. In the proposed paper, a novel analytical method was presented using an integrated multi-body dynamics and finite element analysis to simulate the lateral and torsional vibration. This method was applied to a proposed model of single rotor-system. In order to study the lateral and torsional vibration of the system profoundly, three markers were placed on the locations of the left and right bearings and the mass center of the shaft. The effects of bearing force caused by lateral and torsional vibrations were also analyzed. The results showed that the lateral vibration has a great effect on the dynamic of single rotor-system when lowering motor speed. It was found that, as motor speed increased, the motion of the system becomes more stable with steady fluctuates of the displacement response. The calculated natural frequency of SRS is compared with theoretical results to verify the transient solver. This novel method is practical in analyzing the lateral and torsional vibration of the SRS under various speeds and eccentricities.

Study on Wheel-Rail Coupled Vibration of Metro with Co-Simulation of Finite Element Analysis and Multi-Body Dynamics Simulation

2015 ◽  
Vol 752-753 ◽  
pp. 636-641
Author(s):  
Wen Jing Sun ◽  
Dao Gong ◽  
Jin Song Zhou
Keyword(s):  
Finite Element ◽  
Dynamics Simulation ◽  
Track Structure ◽  
Coupled Vibration ◽  
Dynamics Model ◽  
Element Analysis ◽  
Modal Reduction ◽  
Body Dynamics ◽  
Flexible Track ◽  
Multi Body

Based on the multi-body dynamics theory and modal-reduction analysis, finite element method and multi-body dynamics were combined to establish the flexible track model. The rigid-flexible coupled dynamics model can reflect the features of coupled vibration accurately. When the flexibility of the rail, damping and stiffness of support layers under the rail are taken into consideration, the whole track structure acted as a buffer while wheel and rail is interacting with each other. Compared with rigid track model, the wheel-rail vibration is less in the flexible track model. The proposed method in this paper is simple and effective, which makes the calculation of vehicle-track dynamic response more convenient and quick.

Development of a Molded Case Circuit Breaker with a Spring-Actuated Linkage Based on Multi-Body Dynamics Analysis

2013 ◽  
Vol 711 ◽  
pp. 299-304 ◽  
Author(s):  
Young Shik Kim ◽  
Bong Jo Ryu ◽  
Kil Young Ahn
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Product Development ◽  
Circuit Breaker ◽  
Dynamic Loads ◽  
Dynamics Analysis ◽  
Principal Stresses ◽  
Element Simulation ◽  
Body Dynamics ◽  
Multi Body

In this research we present multi-body dynamics analysis can be applied in product development using a case study of a Molded Case Circuit Breaker (MCCB) with a spring-actuated linkage, which can save time and cost considerably. In particular, we demonstrate how to evaluate and improve durability of the MCCB based on multi-body dynamics and finite element simulation given SM45C steel used for the MCCB links. Toward this goal, a 3D MCCB dynamic model is first developed and dynamic forces are analyzed by using the multi-body dynamics software, ADAMS. Finite element simulation is then performed to examine maximum principal stresses considering deflections and dynamic loads. Further, mechanical properties of SM45C steel are measured experimentally from tensile and fatigue tests. As a result, we verify that stress loads acting on the latch pin of the spring-actuated linkage are critically higher, which ultimately leads to a low-cycle fatigue fracture of the pin. Based on our analytically estimated maximum principal stresses in the MCCB and experimentally measured mechanical properties of SM45C steel, we evaluate design durability and improve our design. As a result, using a 4 mm diameter pin and modifying SM45C with heat treating that includes quenching and tempering, we successfully achieve a MCCB product development, which provides sufficient strengths to prevent yielding and fatigue failures from repeated dynamic loads.

Energy Absorption Configuration of Crashworthy Metro Train

2012 ◽  
Vol 466-467 ◽  
pp. 724-728 ◽  
Author(s):  
Wen Bin Wang ◽  
Li Hui Ren ◽  
He Chao Zhou ◽  
Markus Hecht
Keyword(s):  
Finite Element ◽  
Energy Absorption ◽  
Simulation Method ◽  
Element Analysis ◽  
Linear Finite Element ◽  
Deformation Velocity ◽  
Body Dynamics ◽  
Non Linear ◽  
Crashworthiness Design ◽  
Multi Body

In this paper, a simulation method based on joining non-linear finite element and multi-body dynamics is developed to solve the energy configuration of crashworthy metro train. The relationships of non-linear springs which describe characters of forces-deformation for energy absorption during crash event are obtained by using non-linear Finite Element Analysis (FEA) techniques. Then they are used in simulation for collision of two metro train sets with multi-body dynamics. Compare to the different energy absorption configuration, the results of impact force, deformation, velocity and acceleration are analyzed to assess the passive safety of whole train set. The results indicate that the joining simulation strategy is feasible and effective. It can be used to improve the metro train crashworthiness design by optimizing the energy absorption configuration.

scholarly journals Medium Speed Engine Crankshaft Analysis

2017 ◽  
Vol 50 (3) ◽  
pp. 341-344 ◽  
Author(s):  
Ilkka Väisänen ◽  
Antti Mäntylä ◽  
Antti Korpela ◽  
Teemu Kuivaniemi ◽  
Tero Frondelius
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Medium Speed ◽  
Body Dynamics ◽  
Medium Speed Engine ◽  
Multi Body ◽  
Engine Crankshaft ◽  
Speed Engine ◽  
Bearing Analysis

This article describes the overview of crankshaft analysis of a medium speed dieselengine. Crankshaft analysis includes static analysis, crankshaft dynamics, bearing analysis, gearanalysis, and stress & fatigue analysis, the latter being in main focus in this article. AVL ExcitePower unit is used for multi-body dynamics and Abaqus for finite element analysis.

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