Research on Load Bearing Structure of the Hydraulic Climbing Device of Caliper Type

2012 ◽  
Vol 580 ◽  
pp. 263-265
Author(s):  
Kai Liu ◽  
Hai Ying Zhou ◽  
Ming Jiang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Euler Equation ◽  
Axial Force ◽  
Axial Displacement ◽  
Load Bearing ◽  
Calculation Results ◽  
Method Formulation ◽  
Bearing Structure ◽  
Element Method

According to the characteristics of hydraulic climbing system of caliper type, the load bearing structure of hydraulic climbing system of caliper type is optimized. A precise finite element method formulation is used in calculating stability of load bearing structure taking both axial force and axial displacement into consideration. An example is given to show the calculation results of the precise finite element method formulation is matched with the calculation results of classic Euler Equation. Finally some useful suggestions are given.

Analysis of Axial Deformation of Cross Wedge Rolling Asymmetric Shaft Part Based on Finite Element Method

2011 ◽  
Vol 101-102 ◽  
pp. 396-399
Author(s):  
Xue Dao Shu ◽  
Le Ping Chen ◽  
Xin Hong Wei
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Axial Force ◽  
Theoretical Foundation ◽  
Tangential Force ◽  
Axial Displacement ◽  
Axial Deformation ◽  
Cross Wedge Rolling ◽  
Axial Movement ◽  
Element Method

Aimed at preventing the problems of axial movement, step blemish and rolling overlap piece of skins which make from the imbalance of axial and tangential force because of asymmetry of parts in size and shape, the paper adopted finite element method (FEM) to simulate CWR technique of typical asymmetric shaft part, and analysis systematically axial force and axial displacement. Then we can judge axial offset by axial displacement of central point of billet. The results of the study indicate that FEM can manifest the axial deformation of asymmetric shaft parts in CWR, which provides theoretical foundation for the promotion of CWR technology in the application of asymmetric shaft parts manufacture.

scholarly journals INFORMATIZATION OF CONSTRUCTION MANAGEMENT AS A BASIS FOR PREVENTING MAN-MADE ACCIDENTS

2021 ◽  
Vol 4 (4) ◽  
pp. 11-31
Author(s):  
S. Koryagina
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
The Finite Element Method ◽  
Calculation Results ◽  
Definition Of ◽  
Deep Pits ◽  
Geotechnical Problems ◽  
Seismic Impacts ◽  
Base Structure ◽  
Element Method

the article presents the principles and algorithms of the finite element method in solving geotechnical prob-lems taking into account seismic impacts for determining the stress-strain state of structures and slope stabil-ity, implemented in the Midas GTS NX software package. GTS NX allows you to perform calculations of various types of geotechnical problems and solve complex geotechnical problems in a single software envi-ronment. GTS NX covers the entire range of engineering and geotechnical projects, including calculations of the "base-structure" system, deep pits with various mounting options, tunnels of complex shape, consolida-tion and filtration calculations, as well as calculations for dynamic actions and stability calculations. At the same time, all types of calculations in GTS NX can be performed both in 2D and in 3D. The author does not claim to be the author of the finite element method, but he cannot do without pointing out the basic equa-tions, as this affects the definition of the boundaries of use, the formulation of algorithms for constructing calculation schemes and the analysis of calculation results.

Analysis by the mixed method of statically indeterminate frames with elements of increased rigidity and numerical verification of the calculation results using the finite element method

2021 ◽  
Vol 14 (2) ◽  
pp. 54-66
Author(s):  
Svetlana Sazonova ◽  
Viktor Asminin ◽  
Alla Zvyaginceva
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Initial Data ◽  
Mixed Method ◽  
Numerical Verification ◽  
Bending Moments ◽  
The Finite Element Method ◽  
Calculation Results ◽  
Internal Forces ◽  
Element Method

The sequence of application of the mixed method for calculating internal forces in statically indeterminate frames with elements of increased rigidity is given. The main system is chosen for the frame with one kinematic and one force unknown. The canonical equations of the mixed method are written, taking into account their meaning. Completed the construction of the final diagram of the bending moments and all the necessary calculations and checks. When calculating integrals, Vereshchagin's rule is applied. The solution of the problem is checked by performing the calculation using the computer program STAB12.EXE; the results of the calculations are numerically verified using the finite element method. An example of the formation of the initial data for the STAB12.EXE program and the subsequent processing of the calculation results, the rules for comparing the numerical results and the results obtained in the calculation of the frame by the mixed method are given.

Pipeline On-Bottom Stability Analysis Based on FEM Model

2011 ◽  
Author(s):  
Yong Bai ◽  
Zhimeng Yu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Design Procedure ◽  
Element Model ◽  
The Finite Element Method ◽  
Fem Model ◽  
Engineering Software ◽  
Calculation Results ◽  
Pipeline Design ◽  
Element Method

Pipeline on-bottom stability is one of the sophisticated problems in subsea pipeline design procedure. Due to the uncertainty of the pipe-soil interaction and environment loads, including wave, current, or earthquake, etc., it is classified as the typical nonlinear problem. The Finite Element Method is introduced into pipeline engineering several years ago. More and more special engineering software such as AGA, PONDUS are available in market. However, when doing a project, some abnormal data was found when compared the DnV calculation results and AGA. In order to know the behavior of pipeline on seabed under wave and current load, finite element method – ABAQUS is introduced to do this analysis. The ABAQUS/explicit is used to simulate 600s pipeline dynamic response. The pipeline is supposed to be exposed on seabed and the selected seabed model is large enough to avoid the edge effect. ABAQUS calculation results are compared with the requirements in DnV rules to verify the validity of finite element model.

Force Calculation for Special-Shaped Column Frame Structure of under Earthquake Action

2014 ◽  
Vol 488-489 ◽  
pp. 561-564
Author(s):  
Dong Yu Ji
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Shear Force ◽  
Frame Structure ◽  
Methods Of Calculation ◽  
Calculation Results ◽  
Earthquake Action ◽  
Force Calculation ◽  
Element Method ◽  
D Value

Using finite element method and D-value method, this paper analyzes on force calculation of the special-shaped column frame structure,and obtains shear force and displacement value of the special-shaped column frame structure under the lateral earthquake action. The two methods of calculation results are compared and analyzed, and the results showed that finite element method is an effective method of calculating special-shaped column frame structure.

scholarly journals Research of the strength of the bearing structure of the flat wagon body from round pipes during transportation on the railway ferry

2018 ◽  
Vol 235 ◽  
pp. 00003 ◽  
Author(s):  
Oleksij Fomin ◽  
Juraj Gerlici ◽  
Alyona Lovskaya ◽  
Kateryna Kravchenko ◽  
Pavlo Prokopenko ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fatigue Strength ◽  
Dynamic Loading ◽  
Cyclic Loads ◽  
The Finite Element Method ◽  
Bearing Structure ◽  
Element Method

The dynamic loading of the bearing structure of the flat wagon from round pipes was investigated during transportation on the railway ferry. The main types of movements of the railway ferry with wagons located on its decks are taken into account. The research has been carried out on the strength of the bearing structure of the flat wagon by the finite element method. The coefficient of the reserve for the fatigue strength of the bearing structure is calculated, taking into account the action of cyclic loads in the conditions of sea disturbance.

scholarly journals Magnetic Circuit Design and Magnetic Field Finite Element Analysis of Converging Stepped Magnetofluid Seal with Small Clearance

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Xiaolong Yang ◽  
Guohong Wang ◽  
Ruibo Zhang
Keyword(s):  
Magnetic Field ◽  
Finite Element Method ◽  
Finite Element ◽  
Circuit Design ◽  
Magnetic Circuit ◽  
Element Analysis ◽  
Small Clearance ◽  
Calculation Results ◽  
Theoretical Pressure ◽  
Element Method

The stepped magnetofluid seal is an effective method for improving the pressure ability of ordinary magnetofluid seals (OMS) with large clearance. At present, the research on stepped magnetofluid seal with less than 0.4 mm small clearance has not been carried out yet. The equivalent magnetic circuit design of converging stepped magnetofluid seal (CSMS) with small clearance has been carried out and verified by magnetic field finite element method based on the CSMS theory and magnetic circuit theory. The effects of the width of the axial seal position, the height of the radial seal position, the number of the pole tooth in the axial seal position, and the number of the pole tooth in the radial seal position on the theoretical pressure ability of the CSMS are investigated by numerical simulation. The calculation results are analyzed and discussed. The results show that the magnetic flux leakage at the junction of the permanent magnet and pole piece causes the higher pressure ability of the CSMS structure designed by the equivalent magnetic circuit method than that calculated by the magnetic field finite element method. When the width of the axial seal position is greater than the height of the radial seal position and the number of pole teeth in the axial seal position is less than the number of pole teeth in the radial seal position, the CSMS has the best effect. Compared with OMS with small clearance, CSMS has greater advantages.

scholarly journals Influence of Control and Structure Parameters on the Starting Performance of a 12/8 Pole Switched Reluctance Motor

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3744
Author(s):  
Jichao Han ◽  
Baojun Ge ◽  
Kai Zhang ◽  
Yang Wang ◽  
Chao Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Switched Reluctance Motor ◽  
Structure Parameters ◽  
Two Phase ◽  
Switched Reluctance ◽  
Reluctance Motor ◽  
Calculation Results ◽  
Starting Torque ◽  
Element Method

To investigate the influence of control and structure parameters on the starting performance of a switched reluctance motor, a 12/8 pole switched reluctance motor is analyzed in this paper. The novel field-circuit coupled finite element method of switched reluctance motor is proposed in the paper. The influence of the controller on the switched reluctance motor is considered. The influence of rotor initial position angle, starting mode, starting current, and structure parameters on the starting performance of the switched reluctance motor is studied using the field-circuit coupled finite element method. The starting performance of the switched reluctance motor is obtained under the different control and structure parameters. The alternating starting mode of single- and two-phase winding can improve the starting torque of switched reluctance motor (SRM). As the stator pole arc coefficient increases, the starting torque of SRM increases. The appropriate reduction of the air gap length can improve the starting torque of SRM. Experimental results of the prototype are compared with the calculation results, which verifies the reliability of the calculation method and accuracy of the calculation results.

scholarly journals Method of Calculation Flexural Stiffness Over Natural Oscillations Frequencies

2018 ◽  
Vol 64 (4) ◽  
pp. 89-103
Author(s):  
A. Nesterenko ◽  
G. Stolpovskiy ◽  
M. Nesterenko
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Bearing Capacity ◽  
Flexural Stiffness ◽  
The Finite Element Method ◽  
Load Bearing Capacity ◽  
Natural Oscillations ◽  
Load Bearing ◽  
Resonance Frequencies ◽  
Element Method

AbstractThe actual load-bearing capacity of elements of a building system can be calculated by dynamic parameters, in particular by resonant frequency and compliance. The prerequisites for solving such a problem by the finite element method (FEM) are presented in the article. First, modern vibration tests demonstrate high accuracy in determination of these parameters, which reflects reliability of the diagnosis. Secondly, most modern computational complexes do not include a functional for calculating the load-bearing capacity of an element according to the input values of resonance frequencies. Thirdly, FEM is the basis for development of software tools for automating the computation process. The article presents the method for calculating flexural stiffness and moment of inertia of a beam construction system by its own frequencies. The method includes calculation algorithm realizing the finite element method.

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