scholarly journals Method of controlling geometric accuracy for ship shafts

2020 ◽  
Author(s):  
А.В. Гринек ◽  
С.П. Тимофеев ◽  
С.И. Кондратьев ◽  
А.В. Хуртасенко
Keyword(s):  
Control Method ◽  
Three Dimensional ◽  
Geometric Parameters ◽  
Cylindrical Shape ◽  
Geometric Accuracy ◽  
Original Design ◽  
Cylindrical Parts ◽  
Axis Position ◽  
Measuring Machine ◽  
Dimensional Simulation

В статье представлен способ контроля параметров геометрической точности элементов гребных валов: радиального биения поперечного сечения, отклонения реального профиля вала от цилиндрической формы. Целью работы являлось научное обоснование способа контроля и реализация методики контроля. Разработан алгоритм и схема измерений погрешности формы и положения оси составных валов гребного валопровода на основе существующих авторских решений по контролю точности формы крупногабаритных цилиндрических изделий, в том числе с нестационарной осью вращения. Разработана оригинальная конструкция устройства для контроля геометрических параметров и изготовлена экспериментальная установка и лабораторный образец на базе датчиков отечественного производителя. Алгоритм и методика протестированы с помощью имитационной трехмерной модели. На основе предложенной схемы может быть построено мобильное измерительное оборудование с ручным или автоматизированным измерением - контрольно-измерительная машина. Программно-аппаратная реализация такого оборудования также может основываться на разработанных алгоритмах определения геометрических параметров. The article presents a method for controlling the parameters of geometric accuracy of elements of propeller shafts. The purpose of the work was scientific justification of the control method and methodology implementation. These parameters include the cross section radial runout and the real shaft profile deviations from the cylindrical shape. The author's solutions in the field of controlling the accuracy of the large-sized cylindrical parts shape are obtained. An algorithm and a scheme for measuring the error in the shape and the shaft elements axis position are developed. The presented engineering solutions are applicable to shafts with a non-stationary axis of rotation. The original design of the device for monitoring geometric parameters was developed and an experimental installation and laboratory sample were made based on domestic manufacturer sensors. The algorithm and methodology were tested using a three-dimensional simulation model. On the basis of the proposed circuitry, a mobile measuring equipment with manual or automated measurement can be built - a control and measuring machine. Software and hardware implementation of such equipment can also be based on the developed algorithms for determining geometric parameters.

Data Collection and Model Construction Methods for Reverse Engineering

2010 ◽  
Vol 102-104 ◽  
pp. 189-193
Author(s):  
Ling Yun Jiang ◽  
Zhi Biao Wang
Keyword(s):  
Data Collection ◽  
Point Cloud ◽  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Digital Measurement ◽  
Original Design ◽  
Regular Feature ◽  
Technical Problems ◽  
Construction Methods ◽  
Measuring Machine

The process of creating a CAD model from an object is mainly made up of two steps: the data collection through digital measurement and the construction of parameterized and revisable model. This paper discusses the measuring process and technical problems of the Coordinate Measuring Machine (CMM) and non-contact sensor. Through comparative analysis, we determine the application scope of those approaches in measuring different dimensions of the same objects considering the time efficiency and tolerance requirement. This paper divide the objects into two categories: freeform feature objects and regular feature objects. As for the freeform feature objects, people could fit wrap-around B-spline surfaces to construct the model. Regular feature objects for mass produce contain machined surfaces which should be precisely measured and modeled. The model of regular feature object should be constructed by three-dimensional modeling software, so that it is parametric and revisable for changing and improving the original design. Sizes and position of important surfaces of the model are acquired from CMM, and those of non-important features are fitted though point cloud processing. Some profile can’t be measured directly from CMM but should be precise, so this paper proposed two methods to construct profile line and analyze error by comparing it with point cloud.

Three-dimensional simulation application experience in reconstruction of bridges

2017 ◽  
pp. 238-246
Author(s):  
Nikolay Kanashyn ◽  
Andrey Nikitchyn ◽  
Dmytriy Afonyn
Keyword(s):  
Spatial Data ◽  
Laser Scanning ◽  
Practical Importance ◽  
Three Dimensional ◽  
3D Models ◽  
Software Products ◽  
Design Engineers ◽  
Field Evidence ◽  
Axis Position ◽  
Dimensional Simulation

Objective: To state 3D modeling application experience in bridgeworks reconstruction by the example of Palace Bridge in Saint Petersburg. Methods: It was shown that one of the possible spheres of bridge 3D models application was the acquisition of spatial data of bridge constructions and components’ arrangement, as well as the analysis of main axis position with respect to each other. The technology of acquiring the initial data for modeling was given, the essence of which is in composite application of surface laser scanning, electronic tacheometer line and angle measurements, and measurement of difference in elevation by digital levelling instrument. Order of processing field evidence was stated, as well as the main used software products – CREDO_DAT, X-TOOLS, Autodesk AutoCAD. Results: Fragments of 3D facility models. Practical importance: Opportunity and operability of 3D models application in the process of bridgework reconstruction. The article might be of interest for bridgework design engineers, as well as students and postgraduates, studying the construction and maintenance of bridgeworks.

Three-Dimensional Simulation of Planar Solid Oxide Fuel Cell Stack

2008 ◽  
Vol 128 (2) ◽  
pp. 459-466 ◽  
Author(s):  
Yoshitaka Inui ◽  
Tadashi Tanaka ◽  
Tomoyoshi Kanno
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Three Dimensional ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Cell Stack ◽  
Dimensional Simulation

THREE-DIMENSIONAL SIMULATION OF EFFERVESCENT ATOMIZATION SPRAY

2009 ◽  
Vol 19 (1) ◽  
pp. 75-90 ◽  
Author(s):  
Hong-Bing Xiong ◽  
Jian-Zhong Lin ◽  
Ze-Fei Zhu
Keyword(s):  
Three Dimensional ◽  
Atomization Spray ◽  
Dimensional Simulation

TRANSIENT THREE DIMENSIONAL SIMULATION OF ELECTRIC ARC

1998 ◽  
Vol 2 (1) ◽  
pp. 129-142
Author(s):  
Clarisse Delalondre ◽  
M. Gonzales ◽  
Olivier Simonin ◽  
Said Zahrai
Keyword(s):  
Three Dimensional ◽  
Electric Arc ◽  
Dimensional Simulation

Three Dimensional Simulation of High Severity Internally Finned Cracking Coils for Olefins Production

1996 ◽  
Vol 51 (2) ◽  
pp. 245-260 ◽  
Author(s):  
J. J. De Saegher ◽  
T. Detemmerman ◽  
G. F. Froment
Keyword(s):  
Three Dimensional ◽  
High Severity ◽  
Dimensional Simulation
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