Vibration and Noise Reduction Analysis of Snowplow’s GearBox Case Based on Modal Analysis

2016 ◽  
Vol 13 (10) ◽  
pp. 7426-7432
Author(s):  
Xiangyang Jin ◽  
Jun Wang ◽  
. Zhihui ◽  
Zhihui Sun ◽  
Qiyun Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
Noise Reduction ◽  
Modal Analysis ◽  
Vibration Mode ◽  
Element Model ◽  
Element Analysis ◽  
Modeling Technology ◽  
Comparison Results ◽  
Vibration Noise ◽  
Excessive Noise

Study has been conducted on how, where and why does excessive noise generate on the gear-box of the snowplow, and, measures for improvement have been presented. As well, analysis to the generation mechanism of vibration noise of gearbox and gears has been made, to find out the source of the noise. Next, a precise model of the gearbox, built by using 3D modeling technology, was translated into finite element model to make the modal analysis. Through analyzing characteristics of each vibration mode, positions of the gearbox case on which a vibration is most likely to be generated have been determined. To check the accuracy of theoretical calculation, vibration and noise tests were made to the gearbox. Specific measures for improvement were then put forward by combining results from both finite element analysis and experimental analysis. The comparison results showed that: the improved gearbox case had a significant effect on noise reduction, and the goal of reducing vibration and noise was achieved.

The Modal Analysis of 16V240 Diesel Engine

2013 ◽  
Vol 645 ◽  
pp. 454-458
Author(s):  
Ming Hai Li ◽  
En Zhe Hong ◽  
Yu Guang Zhang
Keyword(s):  
Finite Element ◽  
Diesel Engine ◽  
Modal Analysis ◽  
Natural Frequencies ◽  
Vibration Mode ◽  
Element Model ◽  
Lanczos Method ◽  
Solid Model ◽  
Weak Points ◽  
Structural Redesign

In order to understand the dynamic characteristics of 16V240 type diesel, established its solid model and finite element model. And conduct the modal analysis of 16V240 diesel with Lanczos method to get the natural frequencies and vibration mode. And then, find the weak points of 16V240 diesel for its structural redesign and improving.

Study on Dynamics Analysis and Application of Vibration Modal Testing of Suspension Cable Structure Based on MEMS Sensor

2013 ◽  
Vol 448-453 ◽  
pp. 2149-2152
Author(s):  
Yao En Yang ◽  
Qing Min Wang
Keyword(s):  
Finite Element ◽  
Vibration Mode ◽  
Dynamic Test ◽  
Element Model ◽  
Test System ◽  
Modal Testing ◽  
Element Analysis ◽  
Structural Dynamic ◽  
Mems Sensor ◽  
Inherent Frequency

The large span suspension structure is easy to generate larger vibration due to its smaller stiffness. For this problem, a finite element modal analysis method that considers the effect of initial pre-stress is proposed. The finite element model of the structure is established by using Link10 unit of the finite element analysis software ANSYS. Then the first four order natural frequency and vibration mode under different initial pre-stress is solved by the subspace iterative method. And the experimental test system based on MEMS sensor is designed to analyze the layout of test points and exciting vibration mode of the structure. The test system measures the inherent frequency and the first two order vibration mode under the action of different pre-stress. The results show that the numerical analysis results are basically consistent with the experimental results and the inherent frequency of the structure distributes in the plexus intensive form. And the inherent frequency of the structure is related to the pre-stress. The bigger the stiffness of the structure, the greater the inherent frequency is. It proves that the theoretical analysis results are correct and the experiment test system can be used in the structural dynamic test.

Modal Analysis of Scraper Chain Industrial Robot System

2014 ◽  
Vol 490-491 ◽  
pp. 1190-1193
Author(s):  
Na Liu ◽  
Dian Long Zou ◽  
Tian Jiao Zhou ◽  
Jian Wei Zhao
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Vibration Mode ◽  
Industrial Robot ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Rail Line ◽  
Inherent Frequency

This paper researched dynamic characteristics of 5-DOF scraper chain handling robot by finite element modal analysis. Firstly established the whole three-dimensional model with Solidworks, secondly, transferred it into the ANSYS finite element analysis software to analyze dynamic characteristics in two fixed work positions when it was grasping a scraper chain and carrying a scraper chain on a rail line. It was found the weak component which vibrated heavily was the big arm from the analysis of the top 5 order vibration mode. Then studied modal analysis of the big arm to obtain the its inherent frequency and vibration mode. Finally put forward some suggestions about the design of the handling robot and improved its dynamic characteristics which is meaningful to increase its stability and reliability.

Vibration Modal Analysis of the Upper Frame of Hydraulic Excavator

2012 ◽  
Vol 605-607 ◽  
pp. 1203-1206
Author(s):  
Cui Peng Zuo ◽  
Yi Qi Zhou ◽  
Rui Huo ◽  
Li Wang ◽  
Hao Li
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Element Model ◽  
Weak Links ◽  
Hydraulic Excavator ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Structure Improvement ◽  
Vibration Modal

As the upper frame is an essential supporting structure of Hydraulic Excavator, dynamic characteristics of the structure are particularly important. The finite element model of the upper frame is established by the finite element analysis software, and then modal analysis is carried out in absolute freeness. The former fifteen modes are adopted to review its inherent frequencies and vibration modes seriously, and the dynamic characteristics of the frame are clear. Analysis result indicates that there are some weak links in the structure, and suggestions of modification are put forward for the further structure improvement.

scholarly journals Modal analysis of central impression cylinder based on fluid–solid coupling method

2020 ◽  
pp. 146134842091841
Author(s):  
HP Hou ◽  
TT Rui ◽  
R Deng ◽  
ZF Xu ◽  
SH Liu
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Cooling Water ◽  
Element Model ◽  
Coupling Method ◽  
Mode Shapes ◽  
Element Analysis ◽  
Finite Element Software ◽  
The Finite Element Analysis ◽  
Circulating Cooling Water

As a key component of satellite flexographic printing equipment, the vibration characteristics of the central impression cylinder have an important effect on the product quality. In order to improve dynamic characteristic of the central impression cylinder, the modal analysis on the central impression cylinder is carried out in combination with finite element software in this paper. Then, the modal properties are systematically compared between the central impression cylinder with circulating cooling water and without. The results show that the natural frequency of the central impression cylinder is greatly reduced based on the fluid–solid coupling method. Simultaneously, the natural frequencies and mode shapes of the central impression cylinder based on the finite element analysis are verified by an experimental test. The simulation results are in good agreement with the experimental results, indicating the effectiveness of the finite element model and experimental method used in this study.

Modal Analysis of Boring and Milling Machine

2011 ◽  
Vol 105-107 ◽  
pp. 204-207
Author(s):  
Jian Dong Shang ◽  
Jun Qi Guo ◽  
Dong Fang Hu
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Performance ◽  
Three Dimensional ◽  
Great Influence ◽  
Element Model ◽  
Mode Shapes ◽  
Machining Accuracy ◽  
Element Analysis ◽  
Modes Of Processing

The vibration is a high-precision machine tool components in the design of the major issues, facing its precision has a great influence, so column parts of its modal analysis is necessary. Creating three-dimensional finite element model of the column, using finite element analysis software ANSYS modal analysis of the column, which can reached the first five natural frequencies and mode shapes. Column Part of our understanding of dynamic performance and improve the machining accuracy is helpful. Modal analysis method is the dynamic performance of the column on the main approach, which mainly is to determine the vibration characteristics of the column that is the natural frequency and vibration mode, which we can determine the modes of processing accuracy, and thus the relevant parts of the machine column can be optimized so that it meet the requirements.

The Modal Analysis of the Main Steel Structure of Bucket Wheel Stacker Reclaimer

2013 ◽  
Vol 690-693 ◽  
pp. 3121-3124 ◽  
Author(s):  
Peng Shang ◽  
Yao Zong Hu ◽  
Li Hu He ◽  
Yu Ming Guan
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Modal Analysis ◽  
Vibration Mode ◽  
Steel Structure ◽  
Element Model ◽  
Inherent Frequency ◽  
The Finite Element Model

The vibration mode of main steel structure of bucket wheel stacker reclaimer is complex and changeable, so its modal analysis is necessary. In this paper, the main steel structure of bucket wheel stacker reclaimer was integrally designed and its main parameters were determined. then the finite element model of the main steel structure of the bucket wheel stacker reclaimer was established and the modal analysis was simulated, finally the results of its inherent frequency were calculated by FEA method.

Finite Element Modal Analysis of Whole Structure of Spherical Grinder

2013 ◽  
Vol 677 ◽  
pp. 273-277
Author(s):  
Xiao Xin Gong ◽  
Qiang Lu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Modal Analysis ◽  
Element Model ◽  
Analysis Software ◽  
Element Analysis ◽  
Improvement Measure ◽  
The Finite Element Analysis ◽  
Improved Design ◽  
Ansys Workbench

In order to analyze vibration characteristics of whole structure of the spherical grinder, the finite element analysis software is applied to finite element modal analysis of the structure. 3D model of spherical grinder is established by Pro/ENGINEER software. Finite element model of spherical grinder is established in the finite element analysis software ANSYS Workbench. The previous 6-order inherent frequencies and the corresponding vibration modes are obtained through the finite element calculation. According to the vibration intensity distribution, the corresponding improvement measure is put forward. It provides theoretical basis for dynamic analysis and improved design of spherical grinder.

Modal Analysis of Seat Frame of Bulldozer's Cab Based on Finite Element Method

2012 ◽  
Vol 479-481 ◽  
pp. 1375-1379
Author(s):  
You Liang Yao ◽  
Cui Peng Zuo ◽  
Cui Lan Li ◽  
Li Wang ◽  
Hao Li
Keyword(s):  
Finite Element ◽  
Modal Analysis ◽  
Dynamic Characteristics ◽  
Vibration Mode ◽  
Element Model ◽  
Weak Links ◽  
Inherent Frequency ◽  
Structure Improvement ◽  
Seat Frame ◽  
The Finite Element Model

As the seat frame is an essential structure of bulldozer's cab, dynamic characteristics of the structure are particularly important. The finite element model of the seat frame was established by CATIA software, and then modal analysis was carried out in absolute freeness. After investigating inherent frequency and vibration mode of several typical modes seriously, dynamic characteristics of the frame were clear. Weak links of the structure were obtained on the basis of analysis result, and structure improvement was conducted. Finally, the comparison and analysis was carried out between the unmodified seat frame and the modified one, the result shows that the dynamic characteristic of seat frame is optimized.

scholarly journals Finite Element Model Updating of Satellite Sailboard Based on Sensitivity Analysis

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Haitao Luo ◽  
Wei Wang ◽  
Jia Fu ◽  
Lichuang Jiao
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Modal Analysis ◽  
Mode Shape ◽  
Vibration Mode ◽  
Model Updating ◽  
Element Model ◽  
Acceleration Response ◽  
Modal Frequency

The modal analysis of a satellite sailboard finite element model is carried out to accurately investigate the response of a satellite sailboard in a complex loaded space environment through simulation. The basic excitation vibration test of the satellite sailboard is used to perform model matching and a correlation test. Appropriate design variables are selected through sensitivity analysis. Modal analysis data and vibration table excitation test response data are used to modify the finite element model. After optimization, the orthogonality of the simulated vibration mode and experimental vibration mode is good. The low-order frequency errors in the simulation model are less than 5%, the high-order errors are less than 10%, and the modal confidence MAC values are above 0.8. The modal frequency and mode shape are closer to the experimental modal frequency and mode shape, respectively. The simulation and test acceleration response of the modified finite element model of a honeycomb panel are compared under the two conditions of sine sweep and random vibration. The acceleration response curves of reference points are consistent, and amplitude and frequency errors are within acceptable limits. The model updating effect is evident, which provides good reference for research on satellites and other aerospace products.

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