scholarly journals On computing dynamic loads on flight control surfaces subjected to impact

2018 ◽  
pp. 51-58
Author(s):  
E. A. Samokhina ◽  
P. A. Samokhin
Keyword(s):  
Finite Element ◽  
Flight Control ◽  
Software Package ◽  
Dynamic Loads ◽  
Design Stage ◽  
Natural Vibrations ◽  
Finite Element Software ◽  
Initial Design ◽  
Control Surfaces ◽  
Structure Properties

Predicting structure properties at the initial design stage is especially important for products that will undergo vibration and impact when used. The paper presents a technique for computing dynamic loads on an aircraft rudder arm when it strikes an arrester as it unfolds in flight. We used a finite element software package to analyse the natural vibrations of the structure.

Influence of People Walking on Floor Performance due to Low Level Vibration

2015 ◽  
Vol 802 ◽  
pp. 208-213
Author(s):  
Tuan Norhayati Tuan Chik ◽  
Shurl Yabi ◽  
Mohd Haziman Wan Ibrahim ◽  
Nor Azizi Yusoff ◽  
Taksiah A. Majid ◽  
...  
Keyword(s):  
Software Package ◽  
Laser Doppler Vibrometer ◽  
Vibration Response ◽  
Dynamic Loads ◽  
Mode Shapes ◽  
Low Level ◽  
Vibration Data ◽  
Finite Element Software ◽  
Floor Structure ◽  
Floor Vibrations

Abstract. Vibration in building is one of the important problems which need to consider, especially in designing the floor. Floor vibrations are generally caused by dynamic loads applied particularly by human activity especially walking. Although it is specified as low level amplitude, walking induced vibrations can cause discomfort to human occupants and alarming for a certain items of precision sensitive equipment. This paper investigates the vibration response on floor performance due to one, three and five of people walking. Laser Doppler Vibrometer was used to obtain vibration data when people are walking. Further analysis was carried out by using finite element software package ANSYS to simulate the floor under vibration inputs to obtain natural frequency and mode shapes of the floor structure. The vibration data was then analysed in ModalV analysis to generate the vibration response. Then, the results were checked against the vibration criteria level guideline as a crude tool comparison. As a result, the numbers of people walking were influenced the floor performance, which indicated five peoples walking show the highest response up to ISO level due to vibration compared with one people walking.

Simulation and Analysis for Melt Casting a Metallic Fuel Pin Incorporating Volatile Actinides

2003 ◽  
Author(s):  
Taide Tan ◽  
Randy Clarksean ◽  
Yitung Chen ◽  
Darrell Pepper ◽  
Mitchell K. Meyer
Keyword(s):  
Finite Element ◽  
Software Package ◽  
Solidification Process ◽  
Cylindrical Shape ◽  
Metallic Fuel ◽  
Finite Element Software ◽  
Incompressible Newtonian Fluid ◽  
Fuel Pin ◽  
Study Process ◽  
Filling And Solidification

The filling and solidification process for melt casting a metallic fuel pin is considered. The problem was analyzed numerically using the commercial finite element software package FIDAP (Fluent, Inc.). Numerical simulations are performed to study process parameters that could impact the solidification of the melt within the mold. A Metallic Fuel Pin mold is a long, thin, straw-like pipe, which has a cylindrical shape. The fluid is a high-temperature melt mixture of Am, Pu, and Zr. which is considered as an incompressible Newtonian fluid. Filling velocities and filling pressures are varied to study what impact these parameters might have on flow and solidification within the melt.

Mini Baja Off-Road Vehicle Design and Optimization Using Finite Element Analysis

1995 ◽  
Author(s):  
Anthony M. Gjessing ◽  
Rafiqul I. Noorani
Keyword(s):  
Finite Element ◽  
Software Package ◽  
Engineering Students ◽  
Vehicle Design ◽  
Support Design ◽  
Element Analysis ◽  
Design Decisions ◽  
Road Vehicle ◽  
Design And Optimization ◽  
Finite Element Software

Abstract This paper describes the design, analysis and optimization of a Mini Baja off-road vehicle which will be used to compete with other schools of the nation. The project is undertaken by a group of mechanical engineering students of Loyola Marymount University. The finite element software package used for the optimization is COSMOS/M from SAC in Santa Monaco, CA. Suggestions on how to best use the software to support design decisions is also given. The optimization is made based on material and weight of the vehicle.

Digital Design of the Ocean Casing Pipes Centering Equipment

2009 ◽  
Vol 419-420 ◽  
pp. 673-676
Author(s):  
Xiao Dong Xing ◽  
Li Xun Zhang ◽  
Li Quan Wang ◽  
Jun Liu
Keyword(s):  
Finite Element ◽  
Element Model ◽  
3D Models ◽  
Digital Design ◽  
Design Stage ◽  
Element Analysis ◽  
Butt Welding ◽  
Finite Element Software ◽  
Digital Modelling ◽  
Strength And Stiffness

An Ocean Casing Pipes Centering Equipment is designed and implemented. Utilizing the equipment, two casing pipes can be fastened together by means of welding. The equipment can automatically carry out clamping and centering two casing pipes, and then the butt welding is conducted at their adjacent ends. In the development of this equipment, some advanced means, such as digital modelling and FEA (Finite Element Analysis), are taken full advantage of. First, all the parts’ 3D models are built with Pro/Engineer. Then, those digital parts is assembled in Pro/E assembly environments. Meanwhile, assembly interference detection is executed. Furthermore, by means of universal finite-element software，the finite element model is constructed. The strength and stiffness of the structure is calculated and analyzed so that the faults of the equipment can be found out in design stage. Through repeating this designing and verifying course, the structure of the equipment can be improved.

Generalized finite element analysis of high-rise wall-frame structural systems

2017 ◽  
Vol 34 (1) ◽  
pp. 189-210 ◽  
Author(s):  
HongJun Son ◽  
Jonghwan Park ◽  
Heecheul Kim ◽  
Young Hak Lee ◽  
Dae-Jin Kim
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Design Stage ◽  
Frame Structures ◽  
Analysis Tool ◽  
Content Type ◽  
High Rise ◽  
Initial Design ◽  
Generalized Finite Element ◽  
Element Method

Purpose This paper aims to propose a generalized finite element technique that can accurately approximate the solution of the flexural-shear cantilever model of wall-frame structures proposed by Heidebrecht and Stafford Smith. Design/methodology/approach This approach adopts scaled monomials as enrichment functions, and they are highly effective in accurately capturing the solution of the problem, as it consists of smooth functions such as polynomials, hyperbolic and trigonometric functions. Several numerical experiments are performed on the static and modal analyses of the flexural-shear cantilever wall-frame structures using the proposed generalized finite element method (GFEM), and their accuracies are compared with those obtained using the standard finite element method. Findings The proposed GFEM is able to achieve theoretical convergence rates of the static and modal analyses, which are, in principle, identical to those of the standard FEM, for various polynomial orders of its shape functions such as quadratic, cubic and quartic orders. The proposed GFEM with quartic enrichment functions can provide more accurate solutions than the standard FEM, and thus can be effectively used at the initial design stage of high-rise wall-frame structures. Originality/value This work is the first paper where the GFEM is applied to the analysis of high-rise wall-frame structures, and the developed technique can be used as a good analysis tool at the initial design stage.

The Twisted-Blade Model for Radial-Turbine Mistuning

2017 ◽  
Vol 139 (8) ◽  
Author(s):  
Valentina Futoryanova
Keyword(s):  
Finite Element ◽  
Diesel Engine ◽  
Failure Modes ◽  
Casting Process ◽  
Design Stage ◽  
Turbine Wheel ◽  
Finite Element Software ◽  
Radial Turbine ◽  
Twisted Blade ◽  
Blade Model

One of the common failure modes of the diesel-engine turbochargers is the high-cycle fatigue (HCF) of the turbine-wheel blades. Mistuning of the blades due to the casting process is believed to contribute to this failure mode. Currently available commercial finite-element software requires high computational capacity to model statistical mistuning. The objective is to develop a simple model tailored for the evaluation of statistical mistuning in diesel-engine turbocharger turbine wheels that can be used in the product design stage. This research focuses on the radial turbine-wheel design that is typically used in 6–12 L diesel-engine applications. A continuous twisted-blade model is developed in matlab using finite element techniques. The model is tested and validated against different symmetrical cases as well as abaqus results.

Soil Restraint Against Lateral and Oblique Motion of Pipes Buried in Dense Sand

2012 ◽  
Author(s):  
Kshama Sundar Roy ◽  
Bipul Hawlader
Keyword(s):  
Finite Element ◽  
Software Package ◽  
Three Dimensional ◽  
Test Results ◽  
Finite Element Analyses ◽  
Dense Sand ◽  
Finite Element Software ◽  
Dimensional Finite Element ◽  
Coulomb Model ◽  
Three Dimensional Finite Element

This paper investigates the soil restraint against lateral and oblique motion of pipes buried in dense sand. A series of two- and three-dimensional finite element analyses are performed for pure lateral and combined axial-lateral relative pipeline/soil displacement. The commercially available finite element software package ABAQUS/Standard is used in numerical analysis. The analyses are performed for two burial depths. The numerical model is verified by comparing with model test results available in the literature. The built-in Mohr-Coulomb model in ABAQUS is used for modeling the soil. It is shown that an advanced soil constitutive model might be required for better modeling of pipe/soil interaction behavior.

A New Approach for Predicting Residence Time Distribution of Subsurface Wastewater Infiltration System

2012 ◽  
Vol 518-523 ◽  
pp. 1720-1723
Author(s):  
Jin Feng Dong ◽  
Yue Zhang ◽  
Wei Yu Zhang
Keyword(s):  
Finite Element ◽  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Design Stage ◽  
Design Parameters ◽  
Two Dimensional ◽  
Hydraulic Residence Time ◽  
New Approach ◽  
Finite Element Software

Hydraulic residence time (HRT) is one of the key design parameters controlling the removal efficiency of contaminants and nutrients in subsurface wastewater infiltration system (SWIS). A two-dimensional axisymetric finite element software called SEEP/W was used to simulate unsaturated and saturated flow within SWIS. The paper presents a methodology by example for estimating residence time distribution (RTD) at the design stage of SWIS.

Torsional Analysis of Lattice Towers

1996 ◽  
Vol 11 (3) ◽  
pp. 331-341 ◽  
Author(s):  
J.J. Cao ◽  
A.J. Bell ◽  
K.J. Xu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Stage ◽  
Element Analysis ◽  
Initial Design ◽  
Thin Walled ◽  
Lattice Towers ◽  
Torsional Analysis

This paper is concerned with the calculation of forces and displacements arising from the torsion loading of lattice towers. Square, rectangular and triangular towers with parallel legs, sloping legs and combinations of parallel/sloping legs are considered. New formulae are presented for determining forces and displacements based on formulae similar to those used in torsional theory of thin-walled bars. The formulae are simple and accurate and can be used in practical situations, particularly at the initial design stage or during reassessment of structures for revised loading. The accuracy of the formulae has been confirmed by finite element analysis. Two examples are included to demonstrate the use of the formulae.

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