Finite Element Modal Analysis of S385 Diesel Engine Block

2014 ◽  
Vol 490-491 ◽  
pp. 504-509 ◽  
Author(s):  
Bo Liu ◽  
Hui Lue Jiang
Keyword(s):  
Finite Element ◽  
Diesel Engine ◽  
Structural Design ◽  
Natural Frequencies ◽  
Structural Characteristics ◽  
Engine Block ◽  
Response Analysis ◽  
Vibration Modes ◽  
Element Analysis ◽  
Theoretical Support

Free and constraint modal finite element analysis were conducted on S385 diesel engine block using FEA according to its structural characteristics. The natural frequencies and corresponding vibration modes of the first fifteen steps of each condition of the block were worked out using Lanczos method. By the analysis of vibration modes, the weak spots of the block were found and corresponding improved schemes were brought forward. The analysis results supplied a theoretical support to improve the structural design and the dynamic response analysis of the block.

Finite Element Modal Analysis of Frame of Vertical Type High-Pressure Grouting Machine Based on ANSYS

2012 ◽  
Vol 184-185 ◽  
pp. 235-238
Author(s):  
Zhi Cheng Huang ◽  
Ze Lun Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Pressure ◽  
Structural Design ◽  
Natural Frequencies ◽  
Vibration Modes ◽  
Element Analysis ◽  
Design And Optimization ◽  
The Finite Element Analysis ◽  
Pressure Grouting

The frame of 4MPa vertical type high-pressure grouting machine is used as the research object. The finite element analysis software ANSYS is applied to the modal finite element analysis of the frame. The first five order natural frequencies and the corresponding vibration modes of the frame are obtained, and then the influence of every mode shape on the performances of the frame was discussed. It provides a reference for the dynamic structural design and optimization of the frame of vertical type high-pressure grouting machine.

Dynamic Characteristics Analysis and Topology Optimization of Column Based on Finite Element Method

2013 ◽  
Vol 721 ◽  
pp. 541-544
Author(s):  
Jing Chen ◽  
Ze Long Yang ◽  
Xian Xuan Li
Keyword(s):  
Finite Element ◽  
Topology Optimization ◽  
Frequency Response ◽  
Dynamic Characteristics ◽  
Natural Frequencies ◽  
Mode Shapes ◽  
Response Analysis ◽  
Response Curves ◽  
Element Analysis ◽  
Column Structure

Aiming to improve the dynamic and static characteristics of a type of machining center column, the finite element modal analysis and harmonic response analysis of the column are performed, and this paper analyzes the dynamic characteristics of the column based on the first five mode shapes and natural frequencies of the column and the displacement - frequency response curves of the column. Topology optimization analysis of the column is performed with ANSYS, and the finite element analysis is performed on the column again after the column structure is improved based on the optimal distribution of material of the column structure and the design experience of column. The result shows that the first five natural frequencies of the column increase, the peak of the displacement - frequency response of the column decrease, and the dynamic characteristics are improved significantly.

Vibration Characteristics of a Containing Liquid Cylindrical Pipe with Lumped Mass

2012 ◽  
Vol 184-185 ◽  
pp. 641-644
Author(s):  
Bing Li ◽  
Yu Lan Wei ◽  
Qi Bo Yan ◽  
Yue Zhan Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Natural Frequencies ◽  
Vibration Characteristics ◽  
Experimental Results ◽  
Vibration Modes ◽  
Lumped Mass ◽  
Cylindrical Pipe ◽  
Element Analysis ◽  
Lumped Masses

The liquid within a cylindrical pipe affects the vibration characteristics of the pipe. Furthermore, these vibration characteristics are affected by lumped mass on the pipe. The natural frequencies and the vibration modes of the cylindrical pipe with different lumped masses can be obtained by finite element analysis. The natural frequencies of the containing liquid cylindrical pipe are obtained by experiments. The experimental results show that the natural frequencies of the containing liquid pipe are affected by the lumped mass. The greater the lumped mass is, the smaller the natural frequencies of the pipe are.

The Design and Finite Element Analysis of the Tool in Turning the Inner Ring Groove of a Large Cylindrical Shell

2012 ◽  
Vol 500 ◽  
pp. 174-179 ◽  
Author(s):  
Ji Jun Zhang ◽  
Xian Li Liu ◽  
Geng Huang He ◽  
Tian Xiang Liu ◽  
Xin Jiang Cheng
Keyword(s):  
Finite Element ◽  
Cylindrical Shell ◽  
Structural Design ◽  
Theoretical Basis ◽  
Natural Frequencies ◽  
Simulation Analysis ◽  
Ring Groove ◽  
Element Analysis ◽  
Static And Dynamic Analysis ◽  
Element Simulation

In this paper, for turning the inner ring groove of a large nuclear cylindrical shell, based on requirements of machining condition, the matching tool assembled are designed. Based on the platform of finite element simulation analysis, the deformation and stress analysis of the tools overall structures are carried out, this provides a theoretical basis for the static strength evaluation of the tools. Through the dynamics modal analysis of the tools, natural frequencies and modal shapes of the tools are obtained, this provides a theoretical basis to evaluate the dynamic characteristics of the tools, in particularly, the resonance characteristics. Through static and dynamic analysis, the reasonableness of structural design of the tools is evaluated theoretically.

Influence of Lumped Mass on the Natural Frequency of Cylindrical Pipe

2012 ◽  
Vol 532-533 ◽  
pp. 403-407
Author(s):  
Bing Li ◽  
Yu Lan Wei ◽  
Dan Zhang ◽  
Qing Huang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Natural Frequency ◽  
Natural Frequencies ◽  
Vibration Modes ◽  
Lumped Mass ◽  
Cylindrical Pipe ◽  
Bending Vibration ◽  
Element Analysis ◽  
Lumped Masses

The lumped mass on the cylindrical pipe affects the natural frequency of the cylindrical pipe. The first-three order natural frequencies and vibration modes of the cylindrical pipe with different lumped masses are analyzed by the bending vibration theory and finite element analysis, respectively. The results with different lumped masses are obtained by experiments. As shown in the results, the natural frequencies of the cylindrical pipe with lumped mass are lower than those without lumped mass. The greater the lumped mass is, the smaller the natural frequencies of the pipe are.

Modeling and Modal Analysis of the Whole Structure of PT7032 Tower Crane Based on Finite Element Method

2013 ◽  
Vol 706-708 ◽  
pp. 1433-1436
Author(s):  
Jing Fa Lei ◽  
Xue Hui Chen ◽  
Lei Huang ◽  
Sheng Lei ◽  
Cong Sheng Chen ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Modal Analysis ◽  
Natural Frequencies ◽  
Response Analysis ◽  
Vibration Modes ◽  
Tower Crane ◽  
Resonant Region ◽  
Dynamics Response ◽  
Abaqus Software

In this thesis, PT7032 tower crane was taken as the research object, and the modeling and modal analysis of the overall structure were carried out using Abaqus software. The low-order natural frequencies and main vibration modes of this tower crane were obtained based on the above modal analysis. The analysis results will prevent the tower crane from working on resonant region, and will make preparations for the following dynamics response analysis of the tower crane.

scholarly journals Finite Element and Experimental Vibration Analysis of High-Pressure Fuel Injection Pipe for 8-Cylinder V Diesel Engine

2021 ◽  
Vol 23 (3) ◽  
Author(s):  
Chetan Patil ◽  
◽  
Ratnakar Ghorpade ◽  
Amit Jomde ◽  
Rajesh Askhedkar ◽  
...  
Keyword(s):  
Finite Element ◽  
Diesel Engine ◽  
Vibration Amplitude ◽  
Natural Frequencies ◽  
Fuel Injection ◽  
Control Strategies ◽  
Load Condition ◽  
Mode Shapes ◽  
Pipe Failure ◽  
Element Analysis

Designing of fuel injection pipe for high fuel pressure and vibrations is most important for a diesel engine’s safety and performance. The failure of the fuel injection pipe of a Diesel engine is critical when running at full load condition. This paper presents the mode shapes, natural frequencies, and harmonic analysis of fuel injection pipes to identify the cause of failure. Finite element analysis is conducted to study dynamic behavior under a range of excitation frequencies. In these natural frequencies and mode shapes about the fuel, injection pipe is presented for different configurations. The methodology is prepared to avoid pipe failure by providing clamps at a proper location following modal parameters and providing sufficient damping in a fuel injection pipe assembly. Results indicate that excessive vibration amplitudes and incorrect clamp’s location are responsible for failure (cracks in fuel injection pipes at the diesel engine’s injector side). Different fuel injection pipe assemblies are discussed, control strategies and experimental results are presented to reduce vibration amplitude and stress. The existing fuel injection pipe assembly’s overall vibration amplitude is reduced to 34.5 % and stress by 75 % through the modified assembly.

Bionic design of the tower for wind turbine

2021 ◽  
pp. 095440622110046
Author(s):  
Yuqiao Zheng ◽  
Fugang Dong ◽  
Huquan Guo ◽  
Bingxi Lu ◽  
Zhengwen He
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Natural Frequencies ◽  
Bionic Design ◽  
Analytic Hierarchy ◽  
Element Analysis ◽  
Maximum Deformation ◽  
Overall Stability ◽  
Biological Selection

The study obtains a methodology for the bionic design of the tower for wind turbines. To verify the rationality of the biological selection, the Analytic Hierarchy Procedure (AHP) is applied to calculate the similarity between the bamboo and the tower. Creatively, a bionic bamboo tower (BBT) is presented, which is equipped with four reinforcement ribs and five flanges. Further, finite element analysis is employed to comparatively investigate the performance of the BBT and the original tower (OT) in the static and dynamic. Through the investigation, it is suggested that the maximum deformation and maximum stress can be reduced by 5.93 and 13.75% of the BBT. Moreover, this approach results in 3% and 1.1% increase respectively in the First two natural frequencies and overall stability.

The Finite Element Analysis and Optimization for the Grinder Based on the Joint Surface

2013 ◽  
Vol 281 ◽  
pp. 165-169 ◽  
Author(s):  
Xiang Lei Zhang ◽  
Bin Yao ◽  
Wen Chang Zhao ◽  
Ou Yang Kun ◽  
Bo Shi Yao
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Element Model ◽  
Joint Surface ◽  
Weak Links ◽  
Response Analysis ◽  
Element Analysis ◽  
Static And Dynamic Analysis ◽  
Harmonic Response Analysis ◽  
Grinding Machine

Establish the finite element model for high precision grinding machine which takes joint surface into consideration and then carrys out the static and dynamic analysis of the grinder. After the static analysis, modal analysis and harmonic response analysis, the displacement deformation, stress, natural frequency and vibration mode could be found, which also helps find the weak links out. The improvement scheme which aims to increase the stiffness and precision of the whole machine has proposed to efficiently optimize the grinder. And the first natural frequency of the optimized grinder has increased by 68.19%.

Vibration-Based Crack Detection in L-Frames

2014 ◽  
Vol 658 ◽  
pp. 261-268
Author(s):  
Jean Louis Ntakpe ◽  
Gilbert Rainer Gillich ◽  
Florian Muntean ◽  
Zeno Iosif Praisach ◽  
Peter Lorenz
Keyword(s):  
Strain Energy ◽  
Crack Detection ◽  
Natural Frequencies ◽  
Vibration Modes ◽  
Structural Elements ◽  
Element Analysis ◽  
Accurate Localization ◽  
Mathematical Expressions ◽  
Measurement Results ◽  
Non Destructive

This paper presents a novel non-destructive method to locate and size damages in frame structures, performed by examining and interpreting changes in measured vibration response. The method bases on a relation, prior contrived by the authors, between the strain energy distribution in the structure for the transversal vibration modes and the modal changes (in terms of natural frequencies) due to damage. Using this relation a damage location indicator DLI was derived, which permits to locate cracks in spatial structures. In this paper an L-frame is considered for proving the applicability of this method. First the mathematical expressions for the modes shapes and their derivatives were determined and simulation result compared with that obtained by finite element analysis. Afterwards patterns characterizing damage locations were derived and compared with measurement results on the real structure; the DLI permitted accurate localization of any crack placed in the two structural elements.

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