Dynamics Simulation of the Crank and Connecting Rod Mechanism of Diesel Engine

2011 ◽  
Vol 354-355 ◽  
pp. 438-441
Author(s):  
Qing Guo Luo ◽  
Xu Dong Wang ◽  
Zheng Bo Gong ◽  
Feng Wang
Keyword(s):  
Diesel Engine ◽  
Dynamics Simulation ◽  
Connecting Rod ◽  
Analysis Model ◽  
Element Analysis ◽  
Working Cycle ◽  
Multibody Dynamic ◽  
Virtual Prototyping Technology ◽  
3D Solid ◽  
Multi Body

Based on the virtual prototyping technology and flexible multibody system dynamic theory, the author founded the rigid-flexible coupling multibody dynamic analysis model of the crank and connecting rod mechanism of diesel engine, combining the means of 3D solid modeling, finite element analysis and multi-body dynamic simulation. Through the simulation, the dynamic loads in the working cycle of the mechanism are obtained, which provides reference for dynamic stress and fatigue analysis of the mechanism.

Balance Analysis of Reciprocating Inertia Force Based on Multi-Body System Simulation

2012 ◽  
Vol 538-541 ◽  
pp. 709-712
Author(s):  
Li Li Qin ◽  
Xiao Hui Cao
Keyword(s):  
Diesel Engine ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Inertia Force ◽  
Connecting Rod ◽  
Negative Peak ◽  
Balance Analysis ◽  
The Difference ◽  
Multi Body ◽  
Balance Mechanism

In signal cylinder diesel engine we often use dual shaft balance mechanism to balance reciprocating inertia force produced by the piston and moving parts, and reduce vibration of diesel engine. For this paper, the model crank -connecting rod and balance mechanism of a signal cylinder diesel engine were built in simulation software ADAMS. Piston’s movement law and its force curve have got through multi-body dynamics simulation to the model .By further processing to the simulation results, we got curves of piston’s reciprocating inertia force and balance shaft’s balance force. Comparing the two curves, we got the following conclusions: the difference between positive and negative peak for reciprocating inertia force that haven’t balanced was about 5500 Newton, which was equal to around 34% of the difference between the positive and negative peak for reciprocating inertia force, and the main reason for this is the dual shaft balance mechanism only balanced one step reciprocating inertia force; Though the balance effect was quite obvious, for ideal conditions there is a difference, and further improve can be done.

Comparative Evaluation of Fatigue Assessment Techniques on a Forged Steel Crankshaft of a Single Cylinder Diesel Engine

2012 ◽  
Author(s):  
Rajesh M. Metkar ◽  
Vivek K. Sunnapwar ◽  
Subhash Deo Hiwase
Keyword(s):  
Diesel Engine ◽  
Fracture Mechanics ◽  
Early Stage ◽  
Life Assessment ◽  
Growth Time ◽  
Connecting Rod ◽  
Rotating System ◽  
Element Analysis ◽  
Ic Engine ◽  
Single Cylinder

Crankshaft is one of the critical components of an IC engine, failure of which may result in disaster and makes engine useless unless costly repair performed. It possesses intricate geometry and while operation experiences complex loading pattern. In IC engines, the transient load of cylinder gas pressure is transmitted to crankshaft through connecting rod, which is dynamic in nature with respect to magnitude and direction. However, the piston along with connecting rod and crankshaft illustrate respective reciprocating and rotating system of components. the dynamic load and rotating system exerts repeated bending and shear stress due to torsion, which are common stresses acting on crankshaft and mostly responsible for crankshaft fatigue failure. Hence, fatigue strength and life assessment plays an important role in crankshaft development considering its safety and reliable operation. The present paper is based on comparative studies of two methods of fatigue life assessment of a single cylinder diesel engine crankshaft by using fracture mechanics approach viz. linear elastic fracture mechanics (LEFM) and recently developed critical distance approach (CDA). These methods predict crack growth, time required for failure and other parameters essential in life assessment. LEFM is an analytical method based on stress intensity factor which characteristics the stress distribution in the vicinity of crack tip, where as CDA is a group of methods predicts failure using stress distance plot. The maximum stress value required for both the methods are obtained using finite element analysis. The present paper provides an insight of LEFM and CDA methods along with its benefits to the designers to correctly assess the life of crankshaft at early stage of design. This paper also gives a detailed overview of failure analysis process including theoretical methods and result integration for predicting life of components as compared to life estimation by means of software.

Strength Analysis of Diesel Engine Crankshaft Based on Flexible Multi-Body Dynamics

2014 ◽  
Vol 654 ◽  
pp. 65-68
Author(s):  
Ling Jin Wang ◽  
Dan Li ◽  
Xiu Xia Lu ◽  
Pei Fan Li ◽  
Ying Jun Jia
Keyword(s):  
Diesel Engine ◽  
High Cycle Fatigue ◽  
Dynamics Simulation ◽  
Strength Analysis ◽  
Cycle Fatigue ◽  
Safety Factors ◽  
Body Dynamics ◽  
Dynamics Calculation ◽  
Multi Body ◽  
Engine Crankshaft

Crankshaft is one of the key parts of the diesel engine. Several causes would be lead to the failure of the crankshaft. A novel strength analysis method is used for crankshaft high cycle fatigue simulation of the diesel engine based on flexible multi-body dynamics in this paper. In order to investigate the fatigue strength of other parts of the diesel engine at the same time, a complete coupled dynamic model of diesel engine crankshaft and block is built and coupled dynamics simulation is carried out. Then dynamics calculation results of each part is extracted for high cycle fatigue analysis and the reliability research of the crankshaft, The simulation results show that, the minimum safety factors of the crankshaft is 1.301, it meet the strength requirements, the safety factors of the block and the cap could be calculated at the same time. These suggest that this method can guide the design of the diesel engine crankshaft and has gained significant importance in practical study.

Kinetic and Dynamic Characteristics Analysis of Timing Chain System for Diesel Engine

2014 ◽  
Vol 602-605 ◽  
pp. 398-403
Author(s):  
Jia Xin Xi ◽  
Zeng Ming Feng ◽  
Guo Qiang Wang ◽  
Hai Tao Guo
Keyword(s):  
Diesel Engine ◽  
Dynamic Characteristics ◽  
Drive System ◽  
Chain Drive ◽  
Analysis Model ◽  
Analysis And Evaluation ◽  
Chain System ◽  
Characteristics Analysis ◽  
Multi Body ◽  
Dynamic Characteristics Analysis

Kinetic characteristics of chain drive system were investigated in this paper and some corresponding mathematical models were established. In accordance with the theory of chain drive, based on the multi-body dynamics software platform, a dynamic analysis model of timing bushing chain system for diesel engine was established. Chain tension force, chain contact force and chain fluctuation in a rotation cycle at different running speeds were analyzed. By analysis and evaluation these results, the kinematic and dynamic characteristics of the chain drive system during the operation could be effectively recognized, this research results can provide a basis for production tests.

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.

The Finite Element Analysis of Tension and Compression Condition of Diesel Engine Connecting Rod

2014 ◽  
Vol 722 ◽  
pp. 120-124 ◽  
Author(s):  
Gang Chen ◽  
Lei Wu ◽  
Long Wu ◽  
Pei Qing Xie
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Diesel Engine ◽  
Reference Value ◽  
Production Cycle ◽  
Connecting Rod ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Tension And Compression

In this paper, through the finite element analysis software ANSYS, analysis and research on the part drawing of the diesel engine connecting rod. Using pro/e modeling, introduce it into the finite element analysis software ANSYS for the finite element static analysis of the state of load on the connecting rod. Setting correct model, partitioning appropriate mesh, and setting a reasonable process solution, it can generate visual stress nephogram to facilitate access to important data and intuitive understanding. There is a certain reference value to guide the practical production and shorten the production cycle of the product.

Linear Statics Analysis of the Connecting Rod of a Certain Type of Continuous Mill with Mechanics Properties

2012 ◽  
Vol 252 ◽  
pp. 98-101
Author(s):  
Chang Ping Zou ◽  
Xiao Feng Zhang ◽  
De Rong Cheng ◽  
Xu Zhi Lu
Keyword(s):  
Large Scale ◽  
Integrated Design ◽  
Continuous Mill ◽  
Connecting Rod ◽  
Analysis Software ◽  
Element Analysis ◽  
Fea Model ◽  
3D Fea ◽  
Set Up ◽  
3D Solid

The connecting rod of a certain type of continuous mill early produces crackle,cannot work,hindering the production.The authors are entrusted with the 3D Finite Element Analysis (FEA) of the connecting rod.On SUN workstation,utilizing the large scale Integrated-Design Engineering Analysis Software,I-DEAS,the authors have constructed accurate 3D solid model of the connecting rod,set up effective 3D FEA model,found the solution of several kinds of law of stress distribution and deformation,reached valuable conclusions.

Analysis of Crankshaft Fatigue Strength Based on Integrated Finite Element Model

2010 ◽  
Vol 44-47 ◽  
pp. 1558-1562 ◽  
Author(s):  
Xiao Ping Chen ◽  
Ru Fu Hu ◽  
Shu Hua Zheng
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Fatigue Limit ◽  
Limit Load ◽  
Element Model ◽  
Response Analysis ◽  
Analysis Model ◽  
Element Analysis ◽  
Complex Mechanical Systems ◽  
Multi Body

Aiming at the complex mechanical systems for the prediction of the fatigue limit load requirements, this paper examines the relationship among finite element analysis model and the performance models. And a finite element modeling method for fatigue analysis is proposed. The finite element model can support static, modal, fatigue, and multi-body dynamic response analysis in parallel and collaboration. This method helps improve the fatigue limit load analysis.

Dynamics Simulation of Multi-Mechanism Operation Parameterization Bridge Crane Modeling Based on Rigid-Flexible Coupling System

2013 ◽  
Vol 330 ◽  
pp. 659-667
Author(s):  
Feng Qi Wu ◽  
Hai Xiang Xu ◽  
Xiao Ying Tang ◽  
Wen Qing Yao ◽  
Yu Jiang ◽  
...  
Keyword(s):  
System Modeling ◽  
Coupled System ◽  
Dynamics Simulation ◽  
Systems Dynamics ◽  
Bridge Crane ◽  
Analysis Software ◽  
Element Analysis ◽  
Operation Process ◽  
Coupling System ◽  
Multi Body

The rigid-flexible coupled system modeling of parameterization bridge crane is conducted based on Pro/E, Multi-body systems dynamics simulation & Finite element analysis software, simulation of multi-mechanism operation process is performed as well. The results of dynamic simulation were analyzed and summarized, which is essential to complete crane fatigue strength calculation.

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