Analysis to Dynamic Characteristics Influence on Bearing-Load Sensor to the Rotor System

2011 ◽  
Vol 308-310 ◽  
pp. 2551-2554
Author(s):  
Xin Yu Pang ◽  
Zhao Jian Yang
Keyword(s):  
Finite Element ◽  
Dynamic Equation ◽  
Critical Speed ◽  
Rotor System ◽  
The Other ◽  
Test Bed ◽  
Finite Element Software ◽  
Load Sensor ◽  
Bearing Load ◽  
The Impact

For a multi-bearing rotor test bed, using the load sensor designed specially measured directly the bearing load value. In order to analyze the dynamic influence of the load sensor on the rotor system, the dynamic equation of the rotor system with the load sensor established to do the qualitative analysis. On the other hand, quantitative analyzing the two structures that the sensor is installed and is not by finite element software ANSYS, and obtained the impact value. The results show that the load sensor reduced the critical speed of the rotor system, but the effect is not, can be appropriately adjusted work speed according to the results of the analysis.

The Comparison of Two Processing Methods of Sliding Bearing in Impact Dynamics Analysis of Finite Element Software

2012 ◽  
Vol 226-228 ◽  
pp. 798-801
Author(s):  
Xiao Han Gao ◽  
Yu Wang ◽  
Jian Ye Du ◽  
Xiao Peng Gao
Keyword(s):  
Finite Element ◽  
Single Point ◽  
The Other ◽  
Impact Response ◽  
Contact Model ◽  
Impact Dynamics ◽  
Dynamics Analysis ◽  
Spring Model ◽  
Finite Element Software ◽  
The Impact

In this article, author studied the application of two models of "single point damping-spring" model and "contact" model in the process of impact dynamic analysis. Research shows that the load and force could be transmitted smoothly in all these methods. But there still have limitations in two methods, we could not study the impact response of bearing itself and the shaft neck contacted with bearing in the "single point damping-spring" model, on the other hand, the penetration of contact parts could not be avoided completely in the "contact" model, sometimes, the numerical calculation even could not be converged if the parameters were not be set properly in this method. Of course, this two methods also have their own advantages, we could select different model according to different circumstances.

scholarly journals Collapse Analysis of a Transmission Tower-Line System Induced by Ice Shedding

2021 ◽  
Vol 9 ◽  
Author(s):  
Jiaxiang Li ◽  
Biao Wang ◽  
Jian Sun ◽  
Shuhong Wang ◽  
Xiaohong Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Transmission Lines ◽  
Progressive Collapse ◽  
Element Model ◽  
Transmission Tower ◽  
Line System ◽  
Finite Element Software ◽  
Transmission Towers ◽  
Ice Shedding ◽  
The Impact

Ice shedding causes transmission lines to vibrate violently, which induces a sharp increase in the longitudinal unbalanced tension of the lines, even resulting in the progressive collapse of transmission towers in serious cases, which is a common ice-based disaster for transmission tower-line systems. Based on the actual engineering characteristics of a 500 kV transmission line taken as the research object, a finite element model of a two-tower, three-line system is established by commercial ANSYS finite element software. In the modeling process, the uniform mode method is used to introduce the initial defects, and the collapse caused by ice shedding and its influencing parameters are systematically studied. The results show that the higher the ice-shedding height is, the greater the threat of ice shedding to the system; furthermore, the greater the span is, the shorter the insulator length and the greater the dynamic response of the line; the impact of ice shedding should be considered in the design of transmission towers.

Thermal Stress Analysis of the Die during High Pressure Casting

2014 ◽  
Vol 915-916 ◽  
pp. 1074-1077
Author(s):  
Wu Hu ◽  
Ming Long Kang ◽  
Jian Min Zeng
Keyword(s):  
Finite Element ◽  
High Pressure ◽  
Die Casting ◽  
The Other ◽  
Air Cooling ◽  
Pressure Casting ◽  
Cooling Channel ◽  
Finite Element Software ◽  
Efficient Measure ◽  
Pressure Die Casting

The distribution of temperatures and stresses in the die during high pressure die casting are computed through commercially finite element software developed by Wincast team, Germany. The deformation of the die during its continual running is predicted under the conditions without and with air cooling. The simulated results show that the regions of die, which contact with the casting, is subjected to compressed stresses and the other regions of the die subjected to tensile stresses. Compressed stresses are changed steeply from tensile to compress on the boundary between the casting and the inner cavity walls, which will results in hot-fatigue in those regions of the die. Setting cooling channel within the die is an efficient measure for eliminating hot-fatigue and prolonging life of the die.

Analyze the Impact of the Thin-Walled Hollow Pier by Construction of Reservoir

2013 ◽  
Vol 438-439 ◽  
pp. 1262-1264
Author(s):  
Ke Dong Tang ◽  
Feng Gui Jin
Keyword(s):  
Finite Element ◽  
Realistic Model ◽  
Finite Element Software ◽  
Before And After ◽  
Reservoir Construction ◽  
Thin Walled ◽  
The Impact

The river dam intends to build at 280m downstream of a built bridge. This paper, using ANSYS finite element software, establishes a rational and realistic model to analyze the influence of the reservoir construction on the thin-walled hollow pier of built bridge. The variation of the stress of the bridge thin-walled hollow pier before and after impounding of the reservoir is given out, which can be as a guidance for future reinforcing the thin-walled hollow pier.

Analysis of Influence of Design Parameters on Ultimate Bearing Capacity of the Steel Spatial Tubular Joint

2011 ◽  
Vol 243-249 ◽  
pp. 294-297
Author(s):  
Rui Tao Zhu
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Bearing Capacity ◽  
Plate Thickness ◽  
Ultimate Bearing Capacity ◽  
Design Parameters ◽  
Finite Element Software ◽  
Computing Model ◽  
Tubular Joint ◽  
The Impact

Utilizing general finite element software ANSYS, the finite element computing model of the steel spatial tubular joint is built, which is used to analyze the mechanical properties under dead loads through changing its design parameters. According to the obtained and compared consequences, the different design parameters including stiffening ring thickness, cross-shaped ribbed plate thickness and stiffening ring length exert different influence on ultimate bearing capacity of the steel spatial tubular joint. Specifically, the ultimate bearing capacity under dead loads is affected by setting stiffening ring and changing cross-shaped ribbed plate thickness significantly. In contrast, if the thickness and length of stiffening ring are changed, the impact is insignificant. The results and conclusion can provide reference which is useful to optimize the design of steel spatial tubular joint in such category.

scholarly journals Collapse Behaviour of a Concrete-Filled Steel Tubular Column Steel Beam Frame under Impact Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Lian Song ◽  
Hao Hu ◽  
Jian He ◽  
Xu Chen ◽  
Xi Tu
Keyword(s):  
Finite Element ◽  
Impact Loading ◽  
Mechanical Performance ◽  
Impact Load ◽  
Frame Structure ◽  
Actual Condition ◽  
Transverse Impact ◽  
Time Curve ◽  
Finite Element Software ◽  
The Impact

The progressive collapse of a concrete-filled steel tubular (CFST) frame structure is studied subjected to impact loading of vehicle by the finite-element software ABAQUS, in the direct simulation method (DS) and alternate path method (AP), respectively. Firstly, a total of 14 reference specimens including 8 hollow steel tubes and 6 CFST specimens were numerically simulated under transverse impact loading for verification of finite-element models, which were compared with the existing test results, confirming the overall similarity between them. Secondly, a finite-element analysis (FEA) model is established to predict the impact behaviour of a five-storey and three-span composite frame which was composed of CFST columns and steel beams under impact vehicle loading. The failure mode, internal force-time curve, displacement-time curve, and mechanical performance of the CFST frame were obtained through analyzing. Finally, it is concluded that the result by the DS method is closer to the actual condition and the collapse process of the structure under impact load can be relatively accurately described; however, the AP method is not.

scholarly journals Nonlinear Pounding Analysis of Multispan and Simply Supported Beam Bridges Subjected to Strong Ground Motions

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Hong-Yu Jia ◽  
Xian-Lin Lan ◽  
Nan Luo ◽  
Jian Yang ◽  
Shi-Xiong Zheng ◽  
...  
Keyword(s):  
Finite Element ◽  
Parameter Analysis ◽  
Cross Sectional ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Finite Element Software ◽  
Impact Element ◽  
Bearing Stiffness ◽  
The Impact ◽  
Gap Width

To investigate the nonlinear impact effect of multispan simply supported beam bridges under strong earthquakes, firstly, the dynamic motion equation, the algorithm of its solution, and some pounding modelling methods are presented and the finite element model of a considered multispan simply supported railway beam bridge is established in the nonlinear finite element software of SAP2000 in which the primary nonlinear characteristics of the bearing and the impact element are considered herein. Secondly, the natural vibration characteristic of the considered railway bridge is analyzed to prepare for the subsequent parameter analysis. Finally, the influence of three nonlinear parameters, i.e., stiffness of impact element, separation gap width of expansion joint, and bearing stiffness, on impact responses of bridge structures is studied. The results show that the first several modes of multispan simply supported beam bridges are mainly longitudinal and vertical vibrations. Under longitudinal seismic excitations, the large longitudinal displacement response is induced possibly and results in the collision or even unseating of superstructures at the expansion joints and abutments. The influence of separation gap width between adjacent decks on the pounding effect of bridges is greater than that of collision stiffness originated from the pounding modelling element. The impact force and pounding number run up to the maximum conditional on the collision stiffness of 9.9 × 109 (N/m) and the separation gap width of 0.14 (m). The bearing stiffness affects significantly the displacement of the pier top and the cross-sectional internal force at the bottom of piers but has little effect on the collision force and number.

The Design and Analysis of the Column of the Small Dual Fork Stacking Robot

2012 ◽  
Vol 591-593 ◽  
pp. 48-51
Author(s):  
Huai Xing Wen ◽  
Qing Fu Zhao
Keyword(s):  
Finite Element ◽  
Theoretical Basis ◽  
The Other ◽  
Direct Impact ◽  
Work Situation ◽  
High Rise ◽  
Finite Element Software ◽  
Overall Performance ◽  
Effective Design ◽  
Ansys Workbench

The stacking robot is the main equipment in the automated high-rise warehouse.It plays an important role in the automated high-rise warehouse. Column is a major component of the stacking robot. Its performance has a direct impact on the overall performance of the stacking robot. In this paper, combining with the actual work situation of the stacking robot, we use finite element software Ansys Workbench to analyze the column of the small dual fork stacking robot in structural mechanics.Based on the analysis,we can find its weakness and improve.It provide a theoretical basis for the actual manufacturing of small dual fork stacking robot. At the same time, it also provides an effective design and analysis methods for the manufacture of the other parts of the small dual fork stacking robot.

Analysis of the Wet Grip Characteristics of Tire Tread Patterns

2018 ◽  
Vol 46 (1) ◽  
pp. 2-15 ◽  
Author(s):  
Jinn-Tong Chiu ◽  
Chau-Rung Shui
Keyword(s):  
Finite Element ◽  
Coupling Theory ◽  
Reference Test ◽  
Eu Regulation ◽  
Finite Element Software ◽  
Different Depths ◽  
Transverse Grooves ◽  
Wet Grip ◽  
The Impact ◽  
The Eu

ABSTRACT Since 2009, the EU regulation ECE R117 specifies that the wet grip adhesion must be measured for the approval of tires, and the wet grip index (G) must meet these requirements. To understand wet grip performance, this study performs a set of analyses based on fluid–structure coupling theory in the LS-DYNA finite element software. The impact of both the depth of transverse grooves and Standard Reference Test Tire (SRTT) tread patterns on the wet grip capacity is investigated by simulating the following cases: (1) six SRTT tread patterns, (2) three identical straight grooves with outer transverse grooves of four different depths, and (3) identical straight grooves with inner transverse grooves of three different depths. Results reveal that regarding transverse grooves in the SRTT, tires with outer transverse grooves show an approximately 8% increase in the wet grip compared with those with only straight grooves. With the addition of both outer and inner transverse grooves, the wet grip capacity can be enhanced by approximately 10%.

Accumulator Roll Analysis Using the Finite Element Method

1999 ◽  
Author(s):  
Hazel M. Pierson ◽  
Daniel H. Suchora ◽  
Anthony V. Viviano
Keyword(s):  
Finite Element ◽  
Sheet Metal ◽  
Comparative Approach ◽  
The Finite Element Method ◽  
Roll Design ◽  
Roll Body ◽  
Finite Element Software ◽  
Fea Model ◽  
Finite Element Package ◽  
The Impact

Abstract The purpose of this study was to develop a method to analyze various designs of non-driven accumulator rolls using a static finite element software package. This would allow the engineer to determine how the various components of the roll design contribute to or lessen the deflection of and stresses in the roll body when it is loaded by sheet metal passing over o under it. The method outlined is intended mainly for use when an advanced dynamic finite element package that incorporates contact elements is not available and when a comparison of various roll designs is desired. First, an approximation of the pressure on the roll body caused by the force of the sheet metal as it wrapped over or under the roll was determined. Then using the finite element package ALGOR, an FEA model of a standard accumulator roll design was loaded with this pressure and the stresses and deflections were calculated. Next, components of this basic roll design were varied in the FEA model. These were the location of the stiffeners and the thickness of the roll body, the end plates, and the stiffeners. A comparative approach was then used to assess the impact each of these variations in roll design had oh the deflection of and the stresses in the roll.

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