Finite-Element Analysis of Scale-Model Frame-Supported Tents

1975 ◽  
Author(s):  
Paul J. Remington ◽  
John C. O'Callahan ◽  
Richard Madden
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Scale Model ◽  
Element Analysis

Research on Precast Roof Truss of Prestressed Concrete Square Pile

2014 ◽  
Vol 488-489 ◽  
pp. 359-364
Author(s):  
Jia Bin Liu ◽  
Zheng Xing Guo ◽  
Le Qi Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Prestressed Concrete ◽  
Control Method ◽  
Optimal Solution ◽  
Bending Moment ◽  
Scale Model ◽  
Element Analysis ◽  
Design Load ◽  
Roof Truss

The precast roof truss of prestressed concrete square pile is a new self-balancing system composed of prestressed concrete square pile, strut and steel tension rod. Based on finite element analysis methods, the bending moment and deformation under most unfavorable design load was checked upon crack resistant bending moment to verify its engineering feasibility, the optimal prestressed value was analyzed to get the camber of the top chord beam, and the optimal tension method for bottom chord tension rod was determined. Compared with finite element analysis results, the full scale model test was carried out to further verify its engineering feasibility and some optimization recommendation was proposed. It suggests that the tension order of middle section before diagonal rod, initial prestressed value of 10t, and prestressed control method of monitoring camber at midspan is the most reasonable and optimal solution.

Three-Dimensional Finite Element Analysis of a Scale Model Nuclear Containment Vessel

1986 ◽  
Vol 108 (3) ◽  
pp. 320-329
Author(s):  
G. Derbalian ◽  
G. Fowler ◽  
J. Thomas
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Ultimate Strength ◽  
Three Dimensional ◽  
Scale Model ◽  
Element Analysis ◽  
Containment Vessel ◽  
Nuclear Containment ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Current design procedures for nuclear containment vessels are based on elastic analyses. Though such techniques are adequate under normal operating conditions, if the potential risks associated with extreme environments or accident conditions are to be assessed, knowledge of the ultimate capacity of the containment structure is essential. A key technical question is whether penetrations, such as personnel hatches, weaken the containment structure. In this paper, the maximum pressure sustained by a scale model, steel, nuclear containment vessel with a penetration is determined using a three-dimensional finite element analysis. To assess containment strength, a clean shell is analyzed in closed form for its ultimate strength, and the solution is then compared with finite element results for a structure that has a penetration. The comparison shows that the personnel hatch penetration does not reduce the ultimate strength of the containment structure. In this paper, it is assumed that the materials have no flaws and welded joints are perfectly bonded. Cracks in the structure, which would degrade its strength, are not considered.

Shaking table testing of a U-shaped plan building model

1999 ◽  
Vol 26 (6) ◽  
pp. 746-759 ◽  
Author(s):  
Xilin Lu ◽  
Huiyun Zhang ◽  
Zhili Hu ◽  
Wensheng Lu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Model ◽  
Shaking Table Test ◽  
Complex Structure ◽  
Shaking Table ◽  
Scale Model ◽  
Element Analysis ◽  
Building Model ◽  
Shaking Table Testing

In this paper, the dynamic response of a very complex structure which has U-shaped floors and specially shaped slant columns is described. Shaking table tests of a scale model of the building were carried out to verify the safety of the structure and to confirm the results of a finite element analysis of the building. The elastic finite element analysis was done with the help of Super-SAP 93, a well-known structural analysis program. From the shaking table test and the finite element analysis, the dynamic characteristics of the building and its maximum responses were evaluated. In the elastic region, the analytical results were in good agreement with the test results. At the end of this paper, some suggestions are given for engineering design of this type of structures.Key words: shaking table test, structural model, slant column, U-shaped plan, finite element analysis, seismic response.

Structural Design and Finite Element Analysis for Planet Wheel Gear System

2014 ◽  
Vol 556-562 ◽  
pp. 1174-1177
Author(s):  
Xiao Jing Li ◽  
Cheng Si Li ◽  
Di Wang ◽  
Dong Man Yu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Design ◽  
Bending Strength ◽  
Design Method ◽  
Design Tool ◽  
Gear System ◽  
Scale Model ◽  
Analysis Tool ◽  
Element Analysis

Calculation the gear bottom bending strength and the gear surface contacting stress are traditional wheel gear design method. It takes a long time to design and works out parameters for gears system. Nowadays, the optimization design and reliability theory are introduced into modern engineering, we can make full use of the calculator tool to look for the best design parameter. Modern powerful finite element analysis software packages such as ANSYS are now not only an analysis tool but a design tool as well. This kind of technology makes planet wheel gear system design quantified precisely combining with physics principles in one. In the study, we designed a planet carrier with traditional method and built three dimensional full-scale model in Pro/E software. Based on finite element analysis, the finally result of stress distribution and deformation distribution is obtained. The results indicate that the design can meet the requirement.

A Finite Element Analysis of Cold-Formed Z-Purlins Supported by Sandwich Panels

2013 ◽  
Vol 467 ◽  
pp. 398-403 ◽  
Author(s):  
Olga Tusnina
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Laboratory Experiments ◽  
Sandwich Panels ◽  
Element Model ◽  
Numerical Analyses ◽  
Scale Model ◽  
Element Analysis ◽  
Building Envelopes ◽  
Thin Walled

Nowadays buildings based on lightweight steel skeletons are widespread in civil and industrial engineering. The trapezoidal sheet or roof sandwich panels fastened to thin-walled cold-formed purlins can be used as the building envelopes. In this paper the questions of numerical analysis of thin-walled Z-purlins in the coverings made of sandwich panels are studied. Numerical analyses are performed in the program MSC.NASTRAN. A full scale model of the roof with purlins and sandwich panels is considered. Numerical analyses are based on the laboratory experiments. Results of described analyses are compared with the results of tests. These researches are done to investigate a behavior of the roof system consisted of Z-purlins and sandwich panels and to develop a correct finite element model for the design of cold-formed purlins supported by sandwich panels.

Hydrodynamic Coefficient Maps for Riser Interference Analysis

2015 ◽  
Author(s):  
Suneel Patel ◽  
Shankar Sundararaman ◽  
Pete Padelopoulos ◽  
Kamaldev Raghavan ◽  
Metin Karayaka ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Test Data ◽  
Lift Coefficient ◽  
Circular Cylinders ◽  
Scale Model ◽  
System Response ◽  
Interference Analysis ◽  
Element Analysis ◽  
Viv Suppression

Riser wake interference analysis is conducted based on analytical / semi-empirical models such as Blevins’ and Huse’s models. These models are used for modeling the reduction in particle flow velocity due to the presence of a cylindrical object upstream in the flow path. However, these models are often too conservative and accurate only for circular cylinders. Many top tensioned risers (TTRs) use vortex induced vibration (VIV) suppression devices such as strakes or fairings. There is a need for alternate methods to obtain drag and lift coefficient datasets for circular cylinders with strakes and fairings. Two such approaches are to obtain data from Computational Fluid Dynamics (CFD) simulations or from experimental large-scale model test data. Interpolation and/or extrapolation methods are needed to obtain additional data points for global riser finite element analysis. This paper presents a methodology to obtain hydrodynamic coefficients for TTRs with VIV suppression devices. The proposed methodology uses a combination of empirical formulas based on Blevins’ model and numerical interpolation techniques along with experimental tow tank test data and CFD analysis. The resulting data is then input as user-defined drag/lift coefficients into a global riser finite element analysis to obtain a more realistic riser system response.

scholarly journals Longitudinal seismic responses of a cable-stayed bridge based on shaking table tests of a half-bridge scale model

2018 ◽  
Vol 22 (1) ◽  
pp. 81-93 ◽  
Author(s):  
Li Xu ◽  
Hao Zhang ◽  
Jianfeng Gao ◽  
Chao Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Shaking Table ◽  
Scale Model ◽  
Shaking Table Tests ◽  
Element Analysis ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Scale Ratio ◽  
Main Components

This article studies the seismic response of a symmetric long-span cable-stayed bridge under longitudinal uniform excitations by finite element analysis and shaking table tests. The feasibility and method of performing shaking table tests are examined using a simplified half-bridge scale model. By taking advantage of the symmetry, it is possible to construct a scale model with a larger scale ratio than a full-bridge scale model. The main components of the scale model (i.e. tower, piers, girder, and cables) were fabricated using the same or similar materials as in the prototype. The design and construction of the scale model is presented. Longitudinal structural responses obtained from the finite element analysis and shaking table tests are compared. The seismic mitigation effects of viscous dampers are examined through shaking table tests.

scholarly journals Finite Element Analysis of Concrete Beam under Flexural Stresses Using Meso-Scale Model

2018 ◽  
Vol 4 (6) ◽  
pp. 1288
Author(s):  
Alaa H. Al-Zuhairi ◽  
Ali Ihsan Taj
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Concrete Beam ◽  
Plain Concrete ◽  
Point Load ◽  
Scale Model ◽  
Interfacial Zone ◽  
Element Analysis ◽  
Meso Scale ◽  
Aggregate Particles

Two dimensional meso-scale concrete modeling was used in finite element analysis of plain concrete beam subjected to bending. The plane stress 4-noded quadrilateral elements were utilized to model coarse aggregate, cement mortar. The effect of aggregate fraction distribution, and pores percent of the total area – resulting from air voids entrapped in concrete during placement on the behavior of plain concrete beam in flexural was detected. Aggregate size fractions were randomly distributed across the profile area of the beam. Extended Finite Element Method (XFEM) was employed to treat the discontinuities problems result from double phases of concrete and cracking that faced during the finite element analysis of concrete beam. Cracking was initiated at a small notch located at the middle of the bottom face of the concrete beam. The response of plain concrete beam subjected to pure bending via two point load application was detected using (XFEM) analysis of meso-scale concrete model. Assuming full bond between aggregate particles, and mortar at interfacial zone, the flexural strength of plain concrete beam is increased when aggregate particles size is increased, so that bending and shear stress were affected by void percentage and aggregate particles distribution. The maximum deflection at midspan was increased when the aggregate particles size decreases.

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