Package of Programs for the Synthesis of Space Gear Mechanism in the MAPLE Environment

2013 ◽  
Vol 467 ◽  
pp. 516-521
Author(s):  
D.V. Dudka ◽  
Yu.M. Drakunov ◽  
A. Abduraimov
Keyword(s):  
Structural Design ◽  
Software Package ◽  
Kinematic Synthesis ◽  
Basic Properties ◽  
Gear Mechanism ◽  
Gear Lever ◽  
Synthesis Of Mechanism

The design of any mechanism begins with the design of its scheme. Subsequent calculations for strength, structural design of links and kinematic pairs, choice of materials, and other stages of the design, as a rule cannot significantly change the basic properties of the mechanism. The design of mechanisms scheme on the specified properties is called synthesis of mechanism. In this work we considered the software package of kinematic synthesis of spatial gear lever mechanisms for five, seven, eight and nine parameters.

CULVERT ON THE JOŠANICA RIVER (JOŠANIČKI POTOK)

2020 ◽  
Author(s):  
Biljana Buhavac
Keyword(s):  
Structural Design ◽  
Software Package ◽  
Concrete Structures ◽  
Line Model ◽  
Frame Construction

The bridge is one of the most important buildings used to overcome natural and artificial obstacles. The paper presents a constructed culvert (small bridge) on the river Jošanica, which was designed according to EN 1990 (Basics for structural design), EN 1991-1 (Structural loads) and EN 1991-2 (design of concrete structures). line model 2D (closed frame construction) calculated in the software package Tower 7. The paper approaches the modeling of structures and taking an adequate load. It would be necessary for further research to perform omission auscultations and examine the applicability of the applied methodology for modeling and calculation of the structure.

scholarly journals Toric Methods in F-Theory Model Building

2011 ◽  
Vol 2011 ◽  
pp. 1-18 ◽  
Author(s):  
Johanna Knapp ◽  
Maximilian Kreuzer
Keyword(s):  
Large Class ◽  
Software Package ◽  
Model Building ◽  
Theory Model ◽  
Toric Geometry ◽  
Basic Properties

We discuss recent constructions of global F-theory GUT models and explain how to make use of toric geometry to do calculations within this framework. After introducing the basic properties of global F-theory GUTs, we give a self-contained review of toric geometry and introduce all the tools that are necessary to construct and analyze global F-theory models. We will explain how to systematically obtain a large class of compact Calabi-Yau fourfolds which can support F-theory GUTs by using the software package PALP.

The Innovative Design of Airliner Front Landing Gear Mechanism

2012 ◽  
Vol 433-440 ◽  
pp. 1519-1522 ◽  
Author(s):  
Wan Chun Zhou ◽  
Jing Wang
Keyword(s):  
Topological Structure ◽  
Mechanical Device ◽  
Special Design ◽  
Design Constraints ◽  
Innovative Design ◽  
Kinematic Chains ◽  
Original Product ◽  
Gear Mechanism ◽  
Number Synthesis ◽  
Synthesis Of Mechanism

On the basis of the existing mechanism, we can induce the topological structure of the original mechanism. By using the number synthesis of mechanism, we can find the link assortment which can satisfy topological structure of the original mechanism. By using permutation, we can obtain the generalized kinematic chains. According to the special design constraints, after appointing each link and kinematic pair, we can gain all the suitable feasible specialized chains. Then making a converse reasoning based on the generalized principle, we will finally integrate the schematic diagram of mechanism suitable for our design purpose. Therefore, if we make a kinematic and a dynamic analysis on mechanism based on this, after structural designing, we can find a new mechanical device whose performance is up to or even superior to that of the original product.

scholarly journals STRENGTH PREDICTION OF DIFFERENT ORIENTATION UNIDIRECTIONAL GLASS FIBER LAP JOINTS

2012 ◽  
pp. 278-282
Author(s):  
R. SANTOSH ◽  
B. KIRAN
Keyword(s):  
Tensile Strength ◽  
Composite Materials ◽  
Glass Fiber ◽  
Structural Design ◽  
Software Package ◽  
Weight Ratio ◽  
High Strength ◽  
Lap Joints ◽  
Suitable Alternative ◽  
Robot Systems

Composite materials have made way to various fields, including aerospace structures, underwater vehicles, automobiles and robot systems. Due to the high strength to weight ratio of composites, they serve as a suitable alternative to metals, therefore making the need for a reliable database of structural design more important. Most of the modern civilian and military aircraft use composite materials for their primary structural components (in addition to metals). One of the key areas in composite structural design involves the tensile strength of joints. In the present work, the lap joints fabricated from different orientations of GFRP (Glass fiber reinforced polymer) specimens are subjected to tensile test. The effect of fibre orientation on the tensile strength of lap joint is investigated both experimentally and computationally using conventional software package. The experimental results are compared with FEA using conventional software package ANSYS.

Kinematic Analysis and Synthesis Type III Movable Spatial 6R Mechanism With Three Adjacent Parallel Axes

1992 ◽  
Author(s):  
Chung-Ching Lee ◽  
Hong-Sen Yan
Keyword(s):  
Computer Animation ◽  
Kinematic Analysis ◽  
Special Form ◽  
Matrix Algebra ◽  
Landing Gear ◽  
Type Ii ◽  
Kinematic Synthesis ◽  
Aircraft Landing ◽  
Analysis And Synthesis ◽  
Gear Mechanism

Abstract Based on matrix algebra, we derive the general analytical kinematic solutions of Type II movable spatial 6R mechanism with three adjacent parallel axes. This 6R mechanism was previously identified by the authors, and one of its special form is proposed as the retracting and wheel twisting mechanism for aircraft landing gears. A graphical synthesis technique by descriptive geometry is presented for the kinematic synthesis of the landing gear mechanism. A numerical example is given, and the mobility of this design is verified by computer animation of motions.

scholarly journals Kinematic Synthesis of Mechanism for System with a Technical Vision

2018 ◽  
Vol 237 ◽  
pp. 03009
Author(s):  
Baurzhan Tultayev ◽  
Gani Balbayev ◽  
Algazy Zhauyt ◽  
Aidos Sultan ◽  
Aigerim Mussina
Keyword(s):  
Design Process ◽  
Three Dimensional ◽  
Kinematic Chain ◽  
Kinematic Synthesis ◽  
New Approach ◽  
Kinematic Chains ◽  
Spatial Mechanisms ◽  
Input And Output ◽  
Technical Vision ◽  
Synthesis Of Mechanism

A solution to the problem of synthesizing an initial three-dimensional kinematic chain with spherical and rotary kinematic pairs is presented. It is shown that this chain can be used as a structural module for structural-kinematic synthesis of three-dimensional four-link motion generating lever mechanisms by the preset positions of the in-and output links. This paper affects the actual today’s problem of optimal synthesis of spatial link mechanisms. In this regard, the task of developing methods for the synthesis of complex spatial link mechanisms with the desired laws of motion of the input and output elements allowing automatizing the implementation of all design phases with the use of computer is quite relevant. The authors develop machine-oriented method of structural and kinematic synthesis of spatial link mechanisms based on the use of spatial initial kinematic chains (IKC) realizing prescribed motions. A new approach to the design of spatial mechanisms is suggested, according to which the design process is based on the kinematic synthesis of four-link initial kinematic chain (IKC) and associable kinematic chains (AKC).

UTPLPave: an online software package for pavement structural design in roads using AASHTO-1993 methodology

2020 ◽  
Author(s):  
Yasmany Garcia-Ramirez ◽  
Santiago Quinones Cuenca ◽  
Yandri Lalangui Jaramillo ◽  
Bryan Ramirez Cabrera ◽  
Vinicio Roblez Torres
Keyword(s):  
Structural Design ◽  
Software Package ◽  
Aashto 1993 ◽  
Online Software

Quanitative aspects of electron diffraction using electron holography

1995 ◽  
Vol 53 ◽  
pp. 616-617
Author(s):  
E. Völkl ◽  
L.F. Allard ◽  
B. Frost ◽  
T.A. Nolan
Keyword(s):  
Electron Beam ◽  
Electron Diffraction ◽  
Software Package ◽  
Spatial Coherence ◽  
Electron Holography ◽  
Image Intensity ◽  
Interference Fringes ◽  
Complex Image ◽  
The Difference ◽  
Recorded Image

Off-axis electron holography has the well known ability to preserve the complex image wave within the final, recorded image. This final image described by I(x,y) = I(r) contains contributions from the image intensity of the elastically scattered electrons IeI (r) = |A(r) exp (iΦ(r)) |, the contributions from the inelastically scattered electrons IineI (r), and the complex image wave Ψ = A(r) exp(iΦ(r)) as:(1) I(r) = IeI (r) + Iinel (r) + μ A(r) cos(2π Δk r + Φ(r))where the constant μ describes the contrast of the interference fringes which are related to the spatial coherence of the electron beam, and Φk is the resulting vector of the difference of the wavefront vectors of the two overlaping beams. Using a software package like HoloWorks, the complex image wave Ψ can be extracted.

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