scholarly journals Analysis of the application efficiency of the slab-pile foundation using the example of a two-layer base

2021 ◽  
Vol 263 ◽  
pp. 02034
Author(s):  
Dmitry Chunyuk ◽  
Serafima Selviyan ◽  
Artem Selviyan
Keyword(s):  
Ultimate Load ◽  
Limit Load ◽  
Main Task ◽  
3D Design ◽  
Foundation Slab ◽  
Software Complex ◽  
Entire Structure ◽  
Design Software ◽  
Slab Foundation ◽  
Plaxis 3D

The purpose of this work was to determine the increase of the limit load when resting the foundation slab on the ground at a different pitch of piles and their different length. The main task is to calculate the combined pile-slab foundation. The hypothesis was that when the foundation slab in the work, the bearing capacity of the entire structure increases. This foundation was calculated using the Plaxis 3D design software complex. In this article, we have determined the value by which the ultimate load on the combined pile-slab foundation increases when the slab rests on soil.

Estimate of the Ultimate Load on Structural Members Subjected to Lateral Loads

2001 ◽  
Vol 38 (03) ◽  
pp. 169-176
Author(s):  
L. Belenkiy ◽  
Y. Raskin
Keyword(s):  
Finite Element ◽  
Limit Analysis ◽  
Ultimate Load ◽  
Limit Load ◽  
Plastic Behavior ◽  
Lateral Loads ◽  
Ship Structures ◽  
Strength Assessment ◽  
Stiffened Panels ◽  
Plate Elements

This paper examines plastic behavior of typical ship structures, specifically beams, grillages, and plates subjected to predominantly lateral loads. The ultimate loads, determined on the basis of the theorems of limit analysis [1,2], are evaluated using nonlinear finite-element plastic analysis. The relationships between analytical and finite-element models for prediction of ultimate loads of beams, stiffened panels, and grillages are illustrated. It has been shown that the ultimate loads, obtained from the theorems of limit analysis, can be successfully used for strength assessment of stiffened ship structures subjected to lateral loads. The effect of shear force on ultimate load is analyzed using the finite-element method. This paper confirms that in the case of beams and grillages under lateral loading, the ultimate load may characterize the threshold of the load at which a stiffened ship's structure fails by the development of excessive deflections. For plate elements, on the other hand, the plastic deflections represent the permissible limit of external load better than the ultimate limit load.

Design with Depth

2005 ◽  
Vol 127 (12) ◽  
pp. 32-34
Author(s):  
Jean Thilmany
Keyword(s):  
Computer Aided Design ◽  
Three Dimensional ◽  
3D Design ◽  
Computer Aided ◽  
University Professor ◽  
Business Web ◽  
Design Software ◽  
Computer Monitors ◽  
Web Surfing ◽  
Aided Design

This article discusses that how mechanical engineers will pair their already-familiar computer-aided design software with not-so-familiar three-dimensional (3D) displays for true 3D design. This is in accordance to a number of vendors' intent on supplying the newfangled computer monitors, within the next two decades. Although some of the devices are already on the market, affordable 3D monitors and displays seem to be more than a decade away, according to one university professor at work on such a project. Widespread adoption is still hindered by factors such as cost, software availability, and lack of a mouse-like device needed to interact with what’s on screen. Over the past 25 years, mechanical engineers have witnessed evolutionary change in design methods-from pen and paper to two-dimensional software and now to 3-D computer-aided design. While software makers have stepped up with sleeker and faster modeling capabilities, visualization lags. Computer users two decades out will carry out all business, web surfing, and gaming on 3-D displays. That next generation may well find the very idea of 2-D monitors to be as dated as record albums seem to teenagers today.

The Precise Design and Machining of Formed Milling Cutters Profile Based on Feature Modeling

2007 ◽  
Vol 10-12 ◽  
pp. 791-795 ◽  
Author(s):  
W. Cheng ◽  
P. Liang ◽  
Yun Feng Bu
Keyword(s):  
Great Improvement ◽  
Feature Modeling ◽  
Rake Face ◽  
3D Design ◽  
Milling Cutter ◽  
3D Shape ◽  
Machining Quality ◽  
Design Software

When using the formed milling cutter to machine workpiece, the formed parts are cut by the milling with formed shape, so forms correspond to workpiece outline. In the 3D design software--SolidWorks, the relation of position of the workpiece profile and the milling each other is simulated. This project uses the function of 3D-shape of software to complete the 3D-entity-design of formed milling cutter profile and the drawing of rake face, thus designing the rake face profile directly, with the results of a great improvement on the design and machining quality and effectiveness.

Main Structural Design and Motion Simulation of Stacker Reclaimer Based on Virtual Prototype Technology

2013 ◽  
Vol 721 ◽  
pp. 686-690
Author(s):  
Peng Shang ◽  
Zhi Ping Cui ◽  
Wen Tao Zang ◽  
Shao Wen Song ◽  
Yu Ming Guan
Keyword(s):  
Static Analysis ◽  
Structural Design ◽  
Virtual Prototype ◽  
Parametric Modeling ◽  
Velocity Curve ◽  
Motion Simulation ◽  
3D Design ◽  
Main Structure ◽  
Design Software ◽  
Virtual Prototype Technology

In the paper, the main structural of the bucket wheel stacker reclaimer was designed based on Virtual Prototype Technology. Firstly the bucket wheel stacker reclaimer was built by using 3D design software Solidworks. Then the static analysis of the main structure was done by using FEA method. Then the motion simulation was finished by using Adams, and the velocity curve was described. In the paper, the main structural design and motion simulation was done efficiently based on a series of Virtual Prototype Technology such as parametric modeling, FEA method and motion simulation. The superiority of virtual prototype technology in the design of large engineering equipment is obvious.

scholarly journals DESIGN CONCEPTS OF AN ONBOARD EARLY WARNING SYSTEM OF PILOT ABOUT ENTERING WAKE VORTICES FROM ANOTHER AIRCRAFT

2018 ◽  
Vol 21 (4) ◽  
pp. 84-95 ◽  
Author(s):  
I. G. Golovnev ◽  
V. V. Vyshinsky ◽  
A. I. Zhelannikov ◽  
K. V. Lapshin
Keyword(s):  
Early Warning ◽  
Early Warning System ◽  
Warning System ◽  
Satellite System ◽  
Data System ◽  
Wake Vortex ◽  
Main Task ◽  
Software Complex ◽  
Wake Vortices ◽  
Design Concepts

An airborne aircraft forms a wake vortex behind itself dangerous for other entering it aircraft both piloted and unmanned. Wake vortex intensity depends on parameters of the aircraft creating it, so the greater the aircraft mass is, the higher its impact on other aircraft is. It is not possible to register visually the wake vortex, since in fact it is invisible. Introduction of wide-body aircraft like A380 into service leads to the revision of separation rules with the aim to increase admissible distance between aircraft. There is a quite demonstrative case when Challenger 604 got into the wake vortex after A380: though separation rules at the altitude were observed, Challenger performed an out-of-control rotating descent from the altitude of 10000 m to 3000 m. At present, in spite of multi-year research there are no real verified suggestions on wake vortex safety of aircraft flights. The paper presents the methodological basis and design concepts of an onboard early warning system of a pilot about entering wake vortices from another aircraft. The main task of the proposed system is to reveal wake vortices according to pressure decrease in their cores; to do it we perform on-line measuring of pressure in front of an aircraft. Measurements are done by a standard onboard air data system and an onboard inertial satellite system in order to control the consistency of “barometric” altitude readings and those of altitude defined by an inertial satellite system. The value of wake vortices rarefaction measured by an onboard air data system allows estimating the influence degree of wake vortices on the aircraft roll moment with the help of a special hardware and software complex and to determine the necessity to change the flight mode. It is proposed to use a missile bench for the dimensioning wake vortices on aircraft models in order to test computational methods of wake vortices dimensioning

scholarly journals Research on the Application of 3D New Technology Based on Digital Grid

2021 ◽  
Vol 292 ◽  
pp. 02068
Author(s):  
Chunguang Ren ◽  
Chunhui Li ◽  
Kai Xue ◽  
Chao Xue ◽  
Yanbin Han
Keyword(s):  
Artificial Intelligence ◽  
Power System ◽  
New Technology ◽  
Power Grid ◽  
Digital Transformation ◽  
Current Development ◽  
3D Design ◽  
Data Gaps ◽  
Design Software ◽  
Strategic Goal

The strategic goal proposed by State Grid Corporation is to carry out the digital transformation of the power grid. Among them, the value of the digital power grid is to solve the problem of data gaps required for artificial intelligence in all aspects of the power system in the future. The article briefly introduced the current development of 3D design software in the power system and the application direction of new 3D technologies.

scholarly journals Stress-strein state of weak and filled soils reinforced with reinforced concrete and soil piles, respectively

Vestnik MGSU ◽  
2021 ◽  
pp. 1182-1190
Author(s):  
Zaven G. Ter-Martirosyan ◽  
Armen Z. Ter-Martirosyan ◽  
Aleksandr S. Akuleckij
Keyword(s):  
Reinforced Concrete ◽  
Numerical Methods ◽  
Software Package ◽  
Crushed Stone ◽  
Weak Soils ◽  
Reduced Modulus ◽  
Modulus Of Deformation ◽  
Slab Foundation ◽  
3D Software ◽  
Plaxis 3D

Introduction. The overwhelming majority of construction areas are characterized by difficult engineering and geological conditions, represented by the presence of weak soils at the base. There are construction sites on which a large thickness of fill soil is observed. In these conditions, designers apply: soil consolidation, soil reinforcement, significant deepening of the underground part of buildings, etc. This article presents the formulation and solution of the problems of interaction of reinforced concrete piles with weak soils, as well as the interaction of soil piles with bulk soils as part of a pile-slab foundation, which allow one to determine the reduced deformation modulus and the bedding value. Materials and methods. To describe the change in shear stresses depending on depth, a law was adopted in the form τ(z)=τ0е–αz. The solution is presented by analytical and numerical methods. The results obtained were compared by the analytical solution of the problem with the results obtained in the PLAXIS 3D software package. Results. Regularities of the distribution of the total load on the pile-slab foundation between the pile field and the grillage have been obtained. The analytical solutions in the article are supported by the graphical part, performed using the Mathcad program. Numerical simulation of the problem was carried out in the PLAXIS 3D software package. The dependence of the settlement on the load, calculated by analytical and numerical methods, is shown. An expression is obtained for defining the stresses in different sections of the pile shaft and under the grillage slab. The theoretical and practical aspects of the construction of crushed stone piles are considered. The theoretical substantiation of compaction of bulk soils with crushed stone piles using a special technology is given. A dependence is obtained for determining the reduced modulus of deformation for bulk soil mass reinforced with soil piles. Conclusions. Comparative evaluation of the results of solutions obtained by analytical and numerical methods showed good convergence. The solutions obtained can be used to preliminary determination of the settlement of piles as part of a pile-slab foundation. Selection of the optimal ratio of the pile length and its diameter allows the most effective use of the bearing capacity of the pile. For bulk soils, reinforced with soil piles, it is possible to select the optimal reduced modulus of deformation by varying the pitch of the soil piles.

Finite Element Analysis of Pressure Balance Work over Rig Platform

2013 ◽  
Vol 483 ◽  
pp. 656-659
Author(s):  
Jia Qi Jin ◽  
Ya Zhou Li ◽  
Xian Rong Wang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Working Conditions ◽  
Structural Member ◽  
Pressure Balance ◽  
3D Design ◽  
Element Analysis ◽  
Welded Structure ◽  
Design Software ◽  
Stress At Work

In this article, using the method of the separation of cars and platform design to pressure balance work over rig, that is a large welded structure. Work platform components adopt link and structural member is h-section steel, in terms of stress at work is more complex. Through the 3D design software to model and to analyze the stress of the several typical working conditions, to verify the rationality of the design of the structure and put forward the improvement opinion. The analysis also can be widely applied in all kinds of integral welded structure.

Sign in / Sign up

Export Citation Format

Share Document