Theoretical Analysis on Settlement Calculation of Pile Foundation with Minimum Complementary Energy of Elastic Mechanics Based on the Ritz Variational Method

2013 ◽  
Vol 788 ◽  
pp. 636-639
Author(s):  
Zhi Ran Yao ◽  
Xin Sheng Ge
Keyword(s):  
Variational Method ◽  
Theoretical Calculation ◽  
Model Test ◽  
Pile Group ◽  
Test Results ◽  
Complementary Energy ◽  
Settlement Calculation ◽  
Calculation Results ◽  
Elastic Mechanics ◽  
Matlab Programming

In this paper, based on the model test，numerous deductions and calculations have been done, which was about the settlement of single pile and pile group in homogeneous foundation. With minimum complementary energy of elastic mechanics on the basis of the ritz variational method, through the MATLAB programming, theoretical calculation results were obtained, then comparison and analysis with the model test results were made to verify the feasibility of theoretical calculation.

Numerical Analysis of Prestressed Steel Box Beams

2010 ◽  
Vol 163-167 ◽  
pp. 862-865
Author(s):  
Yan Min Jia ◽  
Dong Wei Liang
Keyword(s):  
Numerical Analysis ◽  
Variational Method ◽  
Model Test ◽  
Composite System ◽  
Steel Beam ◽  
Calculation Results ◽  
Box Beams

The prestressed steel beam is regarded as a composite system of beam and cables, and the interaction of the two parts is fully considered. The variational method is used to derive the equations for calculating the tension increment of external cables and deflection of steel beam under applied loadings. A model test of prestressed steel beam is used to verify the calculation results.

Calculation of Axial Hydraulic Thrust of Francis Turbine

2012 ◽  
Author(s):  
XingYing Ji ◽  
Lai Xu ◽  
Xiao Liu
Keyword(s):  
Numerical Simulation ◽  
Theoretical Calculation ◽  
Significant Role ◽  
Model Test ◽  
Francis Turbine ◽  
Axial Thrust ◽  
Theoretical Methods ◽  
Calculation Results

Put forward a method of calculating the axial thrust of Francis turbine. To use numerical simulation computing the axial thrust on hub, shroud and blade of inner runner, combine theoretical methods calculating the pressure on hub and shroud of outer runner, finally the axial thrust of Francis turbine is obtained. The results of calculation agree with the results of model test. It is an effective way of gathering the theoretical calculation and numerical simulation to calculate the axial thrust of Francis turbine. In addition the static suction of turbine has great effect on calculation results of the axial thrust. The static suction of turbine plays a significant role on the lifting of turbine.

scholarly journals The Design and Implementation of a High-Precision Positioner Fixture

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1227
Author(s):  
Xuesen Zhao ◽  
Rongkai Tan ◽  
Zhe Wang ◽  
Xicong Zou ◽  
Zhenjiang Hu ◽  
...  
Keyword(s):  
Theoretical Calculation ◽  
High Precision ◽  
Tooth Profile ◽  
Alignment Error ◽  
Test Results ◽  
Positioning Accuracy ◽  
Design And Implementation ◽  
Cumulative Error ◽  
Half Angle ◽  
Calculation Results

In this paper, a novel positioner fixture with a high repeated positioning accuracy and a high stiffness is proposed and investigated. A high-precision end-toothed disc is used to achieve the high repeated positioning accuracy of the designed positioner fixture. The mathematical models of the cumulative error of the tooth pitch, the tooth alignment error and the error of the tooth profile half-angle of the end-toothed disc are analyzed. The allowable tolerance values of the cumulative error of the tooth pitch, the tooth alignment error and the error of the tooth profile half-angle of the end-toothed disc are given. According to the theoretical calculation results, a prototype positioner fixture is fabricated and its repeated positioning accuracy and stiffness are tested. The test results indicate that the stiffness of the proposed positioner fixture is 1050.5 N/μm, which is larger than the previous positioner fixtures of the same type. The repeated positioning accuracy of the proposed positioner fixture in the x, y and z directions are ± 0.48 μm, ± 0.45 μm and ± 0.49 μm, respectively, which is significantly higher than the previous positioner fixtures.

The Determination of Foundation Force Modulus Coefficient in the Pile and Soil Interaction

2012 ◽  
Vol 446-449 ◽  
pp. 1596-1601
Author(s):  
Qing Juan Meng
Keyword(s):  
Finite Element ◽  
Compressive Strength ◽  
Model Test ◽  
Displacement Curve ◽  
Beam Model ◽  
Test Results ◽  
Pile Diameter ◽  
Calculation Results ◽  
The Relationship

In this paper, by using the nonlinear winkle foundation beam model the theory pile load displacement curve that corresponding to the model test were calculated, which were compared to the model test results, When this approach, the k used in winkle foundation beam model is the same in model test. According to this method the relationship between the soil force modulus coefficient k and the weakening compressive strength of pile diameter of 0.042 m and 0.02 m were determined, which combined with the value calculation results of other different pile diameter by 3 d finite element ,then the equation of k of different pile diameter and soil strength were determined.

Experimental and Numerical Investigation on the Relative Motions of an FLNG System During Side-by-Side Operation

2016 ◽  
Author(s):  
Qiaowei Xu ◽  
Zhiqiang Hu
Keyword(s):  
Numerical Calculation ◽  
Model Test ◽  
Numerical Models ◽  
Calculation Model ◽  
Test Results ◽  
Sea State ◽  
Calculation Results ◽  
Shelter Effect ◽  
Numerical Calculation Method ◽  
Relative Motions

This paper addresses a study on the relative motions of the floating liquefied natural gas (FLNG) systems during side-by-side offloading operation through experimental method and numerical calculation method. Different filling levels and sea state conditions were adopted both in model test and numerical calculation. Model test results were used to validate the numerical models, which was then used to identify the influence of the filling levels and wave/wind directions on the relative motions of the vessels. It is indicated that the numerical calculation results show satisfactory agreement with the experimental results. More severe relative motions of vessels occur when the displacement of the LNGC reduces. When the wind and wave come from the side of the LNGC, the relative sway and heave of the two vessels become more severe while the relative surge is not affected by the shelter effect. The investigation will be beneficial to the further numeral research and FLNG side-by-side offloading operation.

scholarly journals Sistem Pakar Diagnosis Penyakit pada Ayam dengan Menggunakan Metode Dempster Shafer

2020 ◽  
Vol 4 (1) ◽  
pp. 26-35
Author(s):  
Salsabila Putri Rajani Said ◽  
I Gede Pasek Suta Wijaya ◽  
Fitri Bimantoro
Keyword(s):  
Expert System ◽  
Theoretical Calculation ◽  
Calculation Method ◽  
Black Box ◽  
Test Results ◽  
System Diagnosis ◽  
Android Platform ◽  
Calculation Results ◽  
Black Box Testing

Chicken is one type of poultry that has many benefits, so the chicken can be an option for livestock. This research was conducted to create an expert system that helps provide information to farmers about poultry diseases, especially broilers. This expert system is built on the Android platform and uses the Dempster Shafer calculation method to get the diagnosis of chicken disease. The data used in this study consisted of 38 symptoms and 10 diseases data which were limited to diseases caused by bacteria and viruses. Each symptom has the value of belief given by 3 veterinarians. This study used four types of testing in the form of black-box testing, questionnaire testing, theoretical testing, and accuracy testing. The results of the accuracy testing of the 30 cases given are 92.22% and the system accuracy is 93.33% if the system diagnosis results are assumed to be valid because it is a subsection of expert diagnosis. For questionnaire testing using the MOS, parameters obtained 4.58 results from a scale of 5, as well as theoretical calculation tests that get the same calculation results between the results of expert diagnoses and system diagnoses. Based on the test results, the system built is good and appropriate.

UJI TARIK HIDRODINAMIKMODEL KAPAL BERSAYAP WiSE DENGAN LAMBUNG DASAR BERSTEP

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Iskendar Iskendar ◽  
Andi Jamaludin ◽  
Paulus Indiyono
Keyword(s):  
Comparative Study ◽  
Model Test ◽  
Hydrodynamic Model ◽  
Surface Effect ◽  
Center Of Gravity ◽  
Test Results ◽  
Flat Bottom ◽  
Towing Tank ◽  
Test Models ◽  
Wetted Surface Area

This paper describes hydrodynamic model tests of Wing in Surface Effect (WiSE) Craft. These craft  was fitted with  stephull  form in different location on longitudinal flat bottom (stepedhull planning craft) to determine the influences of sticking and porpoising motion performances. These motions are usually occured when the craft start to take-off from water surfaces. The test models with scale of 1 : 7 were comprised of 4 (four) stephull models and 1 (one) non-stephull model  as a comparative study. The hydrodynamic  tests were performed with craft speed of 16 – 32 knots (prototype values) in Towing Tank at UPT. Balai Pengkajian dan Penelitian Hidrodinamika (BPPH), BPPT, Surabaya. The resistance (drag) was measured by dynamo meter and the trim of model (draft changing at fore and aft  of model due to model speed) was measured by trim meter. By knowing the value of model trim, the wetted surface area can be determined. Then, the lift forces were calculated based on these measured values. The model test results were presented on tables and curves.  Test results show that models  with step located far away from center of gravity of the WiSE craft tend to porpoising and sticking condition, except if the step location on the below of these center of gravity. While model without step tends to sticking conditions.

Inclined Loading Capacity of Embedded Suction Anchors in Clay

2009 ◽  
Author(s):  
Y. S. Kim ◽  
K. O. Kim ◽  
Y. Cho ◽  
S. Bang ◽  
K. D. Jones
Keyword(s):  
Analytical Solution ◽  
Model Test ◽  
Inclination Angle ◽  
Load Application ◽  
Centrifuge Model Test ◽  
Loading Capacity ◽  
Test Results ◽  
Pullout Capacity ◽  
Centrifuge Model ◽  
Inclined Loading

An analytical solution has been developed to estimate the inclined pullout capacity of an embedded suction anchor in clay seafloor. Validation has been made through comparisons with a limited number of centrifuge model test results. Results indicate that the inclined pullout capacity of an embedded suction anchor in clay decreases as the load inclination angle to the horizontal increases. As the point of the load application moves downward, the inclined pullout capacity increases, reaches its peak, and then starts to decrease.

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