PL
 |
EN
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 5

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  technologie informatyczne w odlewnictwie
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Method of taking into account constructional and technological casting modifications in solidification simulations
Mikoda J., Sczygiol N.
Archives of Foundry Engineering
|
2010
|
Vol. 10, iss. 4
147--152
EN
This paper presents the new approach to the problem of finite element mesh generation in case of constructional or technological changes in shape of the analysed area. The authorial method of mesh reconstruction, described in this article, creates meshes for modified areas by modification of mesh generated for the original areas. The following steps of reconstruction are described. These are: shape comparison, performed in order to detect changes and determine their types, removing these elements of original mesh that are located in modified parts of area and re-creating missing elements of new mesh. The authorial mesh generator, which enables to use the mechanism of mesh reconstruction is also described. Two examples of mesh reconstruction are presented in this article. The first example shows situation when constructional changes are implemented and the second one technological. These examples show that the described method allows to decrease time of mesh generation significantly. The last section of this article includes summary and conclusions.
2
Content available remote Algorithms of optimum location of sensors for solidification parameters estimation
Mendakiewicz J.
Archives of Foundry Engineering
|
2010
|
Vol. 10, iss. 4
141--146
EN
The algorithms of optimal sensor location for estimation of solidification parameters are discussed. These algorithms base on the Fisher Information Matrix and A-optimality or D-optimality criterion. Numerical examples of planning algorithms are presented and next for optimal position of sensors the inverse problems connected with the identification of unknown parameters are solved. The examples presented concern the simultaneous estimation of mould thermophysical parameters (volumetric specific heat and thermal conductivity) and also the components of volumetric latent heat of cast iron.
3
Content available remote CastML - a language for description of casting products and processes
Stawowy A., Wrona R., Macioł A.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 4
205-208
EN
This work presents CastML - an XML dialect for description of casting products and processes. CastML is extension of MatML which is an extensible markup language designed specifically for the exchange of materials information. The set of CastML tags allows to describe materials' information as well as technological processes, engineering drawings, products classifications and products manufacturers. CastML is simple, understandable and flexible language which makes it attractive for the specialist involved in any aspect of casting research, development, production, or design. The details on key elements of the proposed language are given. Practical application of CastML is illustrated on the example of an iron castings description.
4
Content available remote Application of experimental data for numerical simulation of cast iron solidification
Mendakiewicz J.
Archives of Foundry Engineering
|
2008
|
Vol. 8, iss. 4
111-114
EN
Numerical analysis of cast iron solidification process is presented. The system casting - shell mould is discussed. The parameter controlling the solidification process called a substitute thermal capacity (STC) has been constructed in this way in order to take into account the evolution of latent heats connected with the solidification of austenite and eutectic phases. The information concerning the proper approximation of STC results from the experimental data using the thermal and derivative analysis (TDA).
5
Content available remote Identification of boundary condition on the contact surface of continuous casting mould
Mochnacki B., Pawlak E.
Archives of Foundry Engineering
|
2007
|
Vol. 7, iss. 4
202-206
EN
In the paper the methods of inverse problems solution are applied for the identification of substitute heat transfer coefficient in the primary cooling zone of continuous casting plant. The heat exchange between the cast strand and the continuous casting mould proceeds in the very complex conditions (air gap, layer of mould dressing, fouling etc.). For the needs of casting solidification modelling the real boundary condition on the contact surface should be simplified and one can introduce the mean boundary heat flux (the Neumann condition) or the substitute heat transfer coefficient (the Robin condition). These values can be found using the inverse approach. In order to solve the problem of identification, the gradient methods are here applied (the least square criterion with regularization parameter).The algorithm presented bases on the sensitivity analysis methods, in other words the values of temperature derivatives with respect to the unknown nodal heat transfer coefficients must be known. The basic and additional boundary problems connected with the sensitivity coefficients computations are solved using the generalized variant of finite differences method. In the final part of the paper the example of computations is shown.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.