Free Modal Analysis of a 2-Cylinder Diesel Engine Cylinder Block

2010 ◽  
Vol 29-32 ◽  
pp. 310-314
Author(s):  
Zhong Cai Zheng ◽  
Na Liu ◽  
Yan Gao ◽  
Kun Jin Zhang ◽  
Hai Ou Chen
Keyword(s):  
Diesel Engine ◽  
Modal Analysis ◽  
Three Dimensional ◽  
Engine Block ◽  
Cylinder Block ◽  
Mode Shapes ◽  
Relative Distribution ◽  
Three Dimensional Model ◽  
Engine Cylinder ◽  
Vibration Magnitude

The three dimensional model of a 2-cylinder diesel engine block is established with the P ro/E software, and then the modal analysis of the engine block is carried out using finite element method with ANSYS software . Through the analysis, the inherent frequencies and mode shapes of the first 6 order modes are obtained respectively, and then are compared with the testing result; comparison shows the results of FEA estimation are in good agreement with those of testing which indicates the FEA results’ correctness. The results of the relative distribution of the vibration magnitude in the whole block are given, which provide necessary guides for the dynamic optimal design of the engine block.

Modal Analysis of Helical Milling Unit

2012 ◽  
Vol 482-484 ◽  
pp. 2454-2459 ◽  
Author(s):  
Xu Da Qin ◽  
Cui Lu ◽  
Qi Wang ◽  
Hao Li ◽  
Lin Jing Gui
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Properties ◽  
Three Dimensional ◽  
Element Model ◽  
Helical Milling ◽  
Mode Shapes ◽  
Three Dimensional Model ◽  
Working Principle ◽  
The Finite Element Model

Based on the analysis of the working principle and structure characteristics of helical milling unit, the prototype’s three-dimensional model was built, the prototype’s finite element modal analysis was conducted, and the first 6 natural frequencies and their mode shapes were obtained. The finite element model is experimentally validated by comparing finite element and experimental modal’s parameters. This paper investigates the dynamic properties of prototype, and provides theoretical references for the subsequent dynamic analysis and structural optimization.

In-Plane Vibration Modes of Arbitrarily Thick Disks

1997 ◽  
Author(s):  
Kevin I. Tzou ◽  
Jonathan A. Wickert ◽  
Adnan Akay
Keyword(s):  
Natural Frequencies ◽  
Arbitrary Dimension ◽  
Three Dimensional ◽  
Mode Shapes ◽  
Vibration Modes ◽  
Three Dimensional Model ◽  
Bending Vibration ◽  
Annular Disk ◽  
Out Of Plane ◽  
Plane Bending

Abstract The three-dimensional vibration of an arbitrarily thick annular disk is investigated for two classes of boundary conditions: all surfaces traction-free, and all free except for the clamped inner radius. These two models represent limiting cases of such common engineering components as automotive and aircraft disk brakes, for which existing models focus on out-of-plane bending vibration. For a disk of significant thickness, vibration modes in which motion occurs within the disk’s equilibrium plane can play a substantial role in setting its dynamic response. Laboratory experiments demonstrate that in-plane modes exist at frequencies comparable to those of out-of-plane bending even for thickness-to-diameter ratios as small as 10−1. The equations for three-dimensional motion are discretized through the Ritz technique, yielding natural frequencies and mode shapes for coupled axial, radial, and circumferential deformations. This treatment is applicable to “disks” of arbitrary dimension, and encompasses classical models for plates, bars, cylinders, rings, and shells. The solutions so obtained converge in the limiting cases to the values expected from the classical theories, and to ones that account for shear deformation and rotary inertia. The three-dimensional model demonstrates that for geometries within the technologically-important range, the natural frequencies of certain in- and out-of-plane modes can be close to one another, or even identically repeated.

Effect of Shroud and Orientation Angles of Inlet Valve on Flow Characteristic Through Helical–Spiral Inlet Port in Diesel Engine

2017 ◽  
Vol 139 (10) ◽  
Author(s):  
A. Abd El-Sabor Mohamed ◽  
Saleh Abo-Elfadl ◽  
Abd El-Moneim M. Nassib
Keyword(s):  
Diesel Engine ◽  
Three Dimensional ◽  
Orientation Angle ◽  
Combustion Efficiency ◽  
Inlet Valve ◽  
Maximum Increase ◽  
Inlet Port ◽  
A Value ◽  
Engine Cylinder ◽  
Dimensional Simulation

The in-cylinder airflow motion is an important factor that severely affects combustion efficiency and emissions in diesel engines. It is greatly affected by the inlet port and valve geometries. A diesel engine cylinder with a helical–spiral inlet port is used in this study. An ordinary inlet valve and shrouded inlet valve having different shroud and orientation angles are used to study the shroud effect on the swirl and tumble motion inside the engine cylinder. Four shroud angles of 90 deg, 120 deg, 150 deg, and 180 deg are used. With each shroud angle, four orientation angles of 0 deg, 30 deg, 60 deg, and 90 deg are also used. Three-dimensional simulation model using the shear stress transport (SST) k–ω model is used for simulating air flow through the inlet port, inlet valve, and engine cylinder during both the intake and compression strokes. The results showed that increasing the valve shroud angle increases the swirl, and the maximum increase occurs at a valve shroud angle of 180 deg and orientation angle of 0 deg with a value of 80% with respect to the ordinary valve. But it decreases the volumetric efficiency, and the maximum decrement occurs at valve shroud of 180 deg and orientation angle of 90 deg with a value of 5.98%. Variations of the shroud and orientation angles have very small effect on the tumble inside the engine cylinder.

Static and Dynamic Characteristics Analysis of HTM125 Milling Complex Machining Center Column

2014 ◽  
Vol 1077 ◽  
pp. 191-196
Author(s):  
Yu Hou Wu ◽  
Yu Hang Ren ◽  
De Hong Zhao ◽  
Feng Lu
Keyword(s):  
Dynamic Characteristics ◽  
Three Dimensional ◽  
Mode Shapes ◽  
Three Dimensional Model ◽  
Static And Dynamic Characteristics ◽  
Machining Center ◽  
Characteristics Analysis ◽  
Object Of Study ◽  
Five Axis ◽  
Dynamic Characteristics Analysis

The column of heavy double turret five-axis horizontal milling complex machining center is taken as the object of study. Solidworks is used to establish three-dimensional model of milling machining center column, the established modal is be imported into ANSYS Workbench for static and dynamic characteristics analysis. First, by comparing the column deformation, the stress and strain under no-load and load conditions, which is concluded that column design is too conservative and be optimized. Secondly, the modal analysis was carried out on the column, which provides a theoretical basis for the optimization of the column by getting the first six natural frequencies and mode shapes of cloud.

Design and Analysis of Folding Mechanism for a New Folding Car

2012 ◽  
Vol 591-593 ◽  
pp. 127-131
Author(s):  
Li Jie Zhao ◽  
Yan Li ◽  
Huan Chen
Keyword(s):  
Modal Analysis ◽  
Three Dimensional ◽  
Main Function ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Folding Mechanism

This paper is focus on design and analysis of folding mechanism for a new folding car. Through analyzing folding principle of different folding cars, one chassis folding type car is introduced. A group of lever linkage is determined to realize the folding effect according to the main function designed and the overall dimension of bodywork. Based on the prototype made by earlier stage of the research, three-dimensional model is established and simulated in motion by the use of UG package. For the validation of this mechanism, modal analysis of the chassis is conducted in terms of ANSYS package.

A STRUCTURAL ANALYSIS AND TOPOLOGY OPTIMIZATION ON CYLINDER BLOCK OF HEAVY DUTY DIESEL ENGIN

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2676-2681 ◽  
Author(s):  
HYUN-SEUNG LEE ◽  
YOUNG-SHIN LEE ◽  
JAE-HOON KIM ◽  
JOON-TAK JUN ◽  
JAE-OK LEE ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Structural Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Cylinder Block ◽  
Fe Model ◽  
Heavy Duty ◽  
Compacted Graphite ◽  
Heavy Duty Diesel Engine ◽  
Heavy Duty Diesel

The heavy duty diesel engine must have a large output for maintaining excellent mobility. In this study, a three-dimensional finite element model of a heavy-duty diesel engine was developed to conduct the stress analysis by using property of CGI. The compacted graphite iron (CGI) is a material currently under study for the engine demanded for high torque, durability, stiffness, and fatigue. The FE model of the heavy duty diesel engine section consisting of four half cylinders was selected. The heavy duty diesel engine section includes a cylinder block, a cylinder head, a gasket, a liner, a bearing cap, bearing and bolts. The loading conditions of engine are pre-fit load, assembly load, and gas load. A structural analysis on the result was performed in order to optimize on the cylinder block of the diesel engine.

Analysis of Fretting Behavior for Fasten Surface between Diesel Engine Cylinder Block and Main Bearing Cap

2012 ◽  
Vol 479-481 ◽  
pp. 986-989
Author(s):  
Wen Li ◽  
Ri Dong Liao ◽  
Zheng Xing Zuo
Keyword(s):  
Diesel Engine ◽  
Crack Initiation ◽  
Load Condition ◽  
Location Parameter ◽  
Fretting Fatigue ◽  
Cylinder Block ◽  
Main Bearing ◽  
Rotating Speed ◽  
Engine Cylinder ◽  
Bearing Cap

Fretting fatigue becomes a typical failure mode for engine cylinder block caused by the increasing of the gas pressure and rotating speed, but the mechanism of fretting fatigue under diesel engine load condition hasn’t been systematic studied. In this paper, the fretting behaviors are mainly discussed by using fretting friction work parameter W and crack initiation location parameter G.

Modal Analysis for Swing-Arm of LED Die Bonder

2011 ◽  
Vol 422 ◽  
pp. 379-382
Author(s):  
Wei Chuang Quan ◽  
Mei Fa Huang ◽  
Zhi Yue Wang ◽  
Da Wei Zhang
Keyword(s):  
Modal Analysis ◽  
Vibration Mode ◽  
Three Dimensional ◽  
Element Model ◽  
Mode Shapes ◽  
Vibration Modes ◽  
Lead Frame ◽  
Swing Arm ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Led die bonder used for bond lead frame and chip is one of the key equipment of led production line. The swing-arm is an important component of led die bonder and its dynamic characteristics will directly affect the piece accuracy. At present, the accuracy and efficiency of led die bonder are limited because of the vibration of the swing-arm. In solving this problem, a three-dimensional finite-element model for swing-arm is built to provide analytical frequencies and vibration modes. Then the modal distribution and vibration mode shapes for swing-arm are obtained after analyzing the modal by ansys10.0. Finally the dynamics effects of this structure by modal frequency and vibration mode are analyzed. The modal analysis of structural would provide the reference to dynamics analysis and structural optimization for swing-arm in practical use.

Modal Analysis of Two Wheels Scooter Based on Solidworks

2014 ◽  
Vol 960-961 ◽  
pp. 1420-1423
Author(s):  
Zhi Dong Huang ◽  
Guo Fei Li ◽  
Juan Cong ◽  
Yun Wang ◽  
Wei Na Yu ◽  
...  
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Dynamic Design ◽  
Driving System ◽  
Set Up ◽  
The Finite Element Model

Based on Solidworks software, the three-dimensional model of two wheels scooter is set up. The finite element model of two wheels scooter is generated. Modal analysis of driving system and telescopic mechanism of bar on two wheels scooter is investigated. The first five orders natural frequency and major modes of driving system and telescopic mechanism of bar are clarified. The method and the result can be used as a reference of dynamic design and lay foundation for calculation and analysis of dynamic response for the two wheels scooter.

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