Axial Force Studies of ESPCP System Based on Triz Theory

2012 ◽  
Vol 152-154 ◽  
pp. 866-871 ◽  
Author(s):  
Wei Xiang Li ◽  
Shi Jie Wang
Keyword(s):  
Bearing Capacity ◽  
Axial Force ◽  
Working Condition ◽  
Matrix Analysis ◽  
System Configuration ◽  
Design Project ◽  
Actual Working ◽  
Submersible Motor

The configuration characteristics and actual working condition of the downhole unit of existing electrical-submersible-motor driven progressing cavity pumping (ESPCP) system are analyzed in detail. Appling the methods and the main tools of Triz theory, conflicting analysis is performed for the axial bearing capacity affecting submersible depth and operational lifespan of downhole unit. The parameters of physical and technical contradictions are standardized. Appropriate principles of invention are selected through contradiction matrix analysis and a more reasonable innovation design project of the ESPCP system configuration is developed. As such, the axial bearing capacity of downhole unit has been effectively improved.

Study on the Load Test of Xiangjiang Cable-Stayed Bridge

2013 ◽  
Vol 361-363 ◽  
pp. 1438-1441
Author(s):  
Yue Long Sun ◽  
Lei Wang
Keyword(s):  
Bearing Capacity ◽  
Mechanical Characteristic ◽  
Dynamic Characteristics ◽  
Working Condition ◽  
Load Test ◽  
Bridge Structure ◽  
Dynamic Tests ◽  
Cable Stayed Bridge ◽  
Actual Working ◽  
Static And Dynamic Tests

Xiangjiang Bridge is a newly built bridge. In order to understand the actual working condition and the bearing capacity of the bridge, the static and dynamic tests are carried out. This paper describes the principles and methods of the load test and the measurement of the stiffness and dynamic characteristics of the bridge structure. Through analyzing the test, the data and information of bridge can be accumulated and the mechanical characteristic of this kind of bridge is discussed.

scholarly journals Pile Model Tests Using Strain Gauge Technology

2015 ◽  
Vol 37 (3) ◽  
pp. 49-52 ◽  
Author(s):  
Adam Krasiński ◽  
Tomasz Kusio
Keyword(s):  
Bearing Capacity ◽  
Axial Force ◽  
Strain Gauge ◽  
Force Measurement ◽  
Ground Level ◽  
Model Tests ◽  
Scale Model ◽  
Small Scale ◽  
Pile Head ◽  
Pile Model

Abstract Ordinary pile bearing capacity tests are usually carried out to determine the relationship between load and displacement of pile head. The measurement system required in such tests consists of force transducer and three or four displacement gauges. The whole system is installed at the pile head above the ground level. This approach, however, does not give us complete information about the pile-soil interaction. We can only determine the total bearing capacity of the pile, without the knowledge of its distribution into the shaft and base resistances. Much more information can be obtained by carrying out a test of instrumented pile equipped with a system for measuring the distribution of axial force along its core. In the case of pile model tests the use of such measurement is difficult due to small scale of the model. To find a suitable solution for axial force measurement, which could be applied to small scale model piles, we had to take into account the following requirements: - a linear and stable relationship between measured and physical values, - the force measurement accuracy of about 0.1 kN, - the range of measured forces up to 30 kN, - resistance of measuring gauges against aggressive counteraction of concrete mortar and against moisture, - insensitivity to pile bending, - economical factor. These requirements can be fulfilled by strain gauge sensors if an appropriate methodology is used for test preparation (Hoffmann [1]). In this paper, we focus on some aspects of the application of strain gauge sensors for model pile tests. The efficiency of the method is proved on the examples of static load tests carried out on SDP model piles acting as single piles and in a group.

Analysis and Calculation of Spud Clamshell Dredger’s Heeling

2014 ◽  
Vol 548-549 ◽  
pp. 406-409
Author(s):  
Han Bin Xiao ◽  
Kai Fa Lu ◽  
Shi Qing Lu
Keyword(s):  
Water Flow ◽  
Working Condition ◽  
High Technology ◽  
Center Of Gravity ◽  
Positioning Accuracy ◽  
Structural Part ◽  
Actual Working ◽  
Underwater Positioning ◽  
Geometrical Relationship

As a ship of high technology content, dredger is equipped with a very important structural part—spud. In actual working condition, spud is affected by seabed terrain and force of sediment. Moreover, water flow and wind will impact the hull. Consequently, the effect of moment of force on the hull’s center of gravity will cause heeling of the hull. This paper, with the help of geometrical relationship, is to quantificationally analyze and calculate the influence of transverse, longitudinal sloping and ordinary heeling on the underwater positioning accuracy of clamshell in the condition of heeling. Then it offers relevant compensation, in order to reduce the accuracy error of clamshell’s underwater positioning caused by hull’s heeling.

An Overview of a Capstone Design Course and a Project

1994 ◽  
Vol 22 (3) ◽  
pp. 229-234
Author(s):  
Darrell K. Kleinke ◽  
H. Mehmet Uras
Keyword(s):  
Software Development ◽  
Concept Development ◽  
Computer Integration ◽  
Design Project ◽  
Actual Working ◽  
Positioning Device ◽  
Computer Controlled ◽  
Sensor Positioning ◽  
Capstone Design

An overview of the organization of a one-semester capstone design course is presented along with the description of a design project: ‘Sensor positioning device’. The students work as teams on a given project, starting from concept development to constructing and testing an actual working prototype. The sensor positioning device has electromechanical components and is computer-controlled. It is a multidisciplinary project with computer integration and software development.

scholarly journals Non-linear Analysis of Slender High Strength Concrete Column

2019 ◽  
Vol 5 (7) ◽  
pp. 1440-1451
Author(s):  
Ernesto Fenollosa ◽  
Iván Cabrera ◽  
Verónica Llopis ◽  
Adolfo Alonso
Keyword(s):  
Bearing Capacity ◽  
Cross Section ◽  
Axial Force ◽  
High Strength Concrete ◽  
Bending Moment ◽  
High Strength ◽  
Concrete Columns ◽  
Strength Concrete ◽  
The Moment ◽  
High Strength Concrete Columns

This article shows the influence of axial force eccentricity on high strength concrete columns design. The behavior of columns made of normal, middle and high strength concrete with slenderness values between 20 and 60 under an eccentric axial force has been studied. Structural analysis has been developed by means of software which considers both geometrical and mechanical non-linearity. The sequence of points defined by increasing values of axial force and bending moment produced by eccentricity has been represented on the cross-section interaction diagram until failure for each tested column. Then, diagrams depicting the relationship between failure axial force and column's slenderness have been drawn. The loss of bearing capacity of the member for normal and middle strength columns when compared with the bearing capacity of their cross-section is more noticeable as axial force eccentricity assumes higher values. However, this situation reverses for high strength columns with high slenderness values. On the basis of results obtained, the accuracy level for the moment magnifier method was checked. Despite the good concordance in most of the cases, it was verified that the moment magnifier method leads to excessively tight results for high strength concrete columns with high slenderness values. In these specific cases, a coefficient which amends the column rigidity is proposed so as to obtain safer values.

Study on the Accuracy of Web Offset Press’s Fold Mechanism

2011 ◽  
Vol 338 ◽  
pp. 450-455
Author(s):  
Ying Cai Yuan ◽  
Yan Li ◽  
Yi Ming Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Condition ◽  
Lateral Displacement ◽  
Element Analysis ◽  
Dynamic Coefficients ◽  
Actual Working ◽  
Displacement Model ◽  
Accuracy Problem

The cutter’s lateral displacement along the paper’s movement is the main reason which causes the folding accuracy problem. The folding stem is deformed in actual working condition, which causes the cutter emerge lateral displacement. The structure of folding stem is complex, it needs the combination of mechanics and finite element analysis to get the fitting formula relation of the folder’s deformation and the loadings. By the dynamic coefficients, which express the relation of loadings between the working velocity and clearances, the cutter’s lateral displacement model is established based on studying the relation of the cutter’s lateral displacement and the folder stem’s deformation. By the model, the folding accuracy is studied in different working velocities and conditions.

Study on the Static and Dynamic Load Test of Nicky Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1194-1198
Author(s):  
Dan Ni Wang ◽  
Lei Wang ◽  
Ming Li ◽  
Yue Long Sun
Keyword(s):  
Dynamic Load ◽  
Working Condition ◽  
Dynamic Structure ◽  
Dynamic Structure Factor ◽  
Load Test ◽  
Dynamic Tests ◽  
Actual Working ◽  
Dynamic Load Test ◽  
Static And Dynamic Tests ◽  
Working Performance

In order to understand the actual working condition and the bearing capacity of the bridge, the static and dynamic tests were carried out. By measuring the stress-strain and deformation of the main control sections of the bridge, we can determine if the design expectations of the structure and its actual working performance were consistent. Through dynamic load test motivating the bridge, we got the dynamic structure factor and vibration characteristics.

scholarly journals Further study on thermal deformation reduction for CFRP-based improved ball screws

2020 ◽  
Vol 29 ◽  
pp. 2633366X2091798
Author(s):  
Xiangsheng Gao ◽  
Yueyang Guo ◽  
Min Wang ◽  
Tao Zan
Keyword(s):  
Thermal Deformation ◽  
Working Condition ◽  
Ball Screw ◽  
Fe Model ◽  
Input File ◽  
Fe Method ◽  
Time Step ◽  
Actual Working ◽  
G Code ◽  
Novel Method

To determine the thermal deformation of ball screw in actual working condition, a novel method for determining thermal deformation of ball screws in complicated working condition is proposed based on G-code and finite-element (FE) method. In the complicated working condition, it is difficult to obtain and import the nut movement into FE model due to the complex nut movement. In this research, the nut movement is directly determined from G-code by MATLAB code programming. The nut location is recorded with time in a file. The thermal parameters can be determined according to the nut speed with time as well. In the implicit FE analysis, the nut location is read from the input file instead of nut location calculation before every time step. And then, the effect of factors, such as working condition and materials, on thermal deformation reduction of ball screw is studied. The thermal deformation reduction of ball screws under different rotational speed, actual working condition, and different axial elastic modulus of composites is discussed, which can provide the guidelines to evaluate the thermal deformation reduction and design the composite in improved ball screws.

Experimental Verification on Bearing Capacity of Concrete-Filled Steel Tube Short Columns Based on Unified Theory

2010 ◽  
Vol 163-167 ◽  
pp. 1999-2004 ◽  
Author(s):  
Jing Ji ◽  
Wen Fu Zhang ◽  
Hai Yan Sui
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Axial Force ◽  
Calculation Method ◽  
Steel Tube ◽  
Ultimate Bearing Capacity ◽  
Unified Theory ◽  
Concrete Filled Steel Tube ◽  
Short Columns ◽  
Load Displacement

To verify the rationality of calculation method on unified theory of concrete - filled steel tube short columns under axial force, Experimental Study on mechanical properties of the 12 concrete -filled steel tube short columns with 7 different sections under axial force is preformed. Failure process and Failure mode of them are observed, load-displacement curves are obtained, and the influence for confinement coefficient ξ to the mechanical properties of short columns under axial load is analyzed. Based on load-displacement curves, ultimate bearing capacities of them are given. By comparison for ultimate bearing capacity obtained by testing and the bearing capacity according to unified theory, the results show both are in good agreement. Calculation method on unified theory of concrete - filled steel tube is fit for calculating ultimate bearing capacity of short columns under axial force with different sections, and the results are safe and reliable.

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