Wyniki wyszukiwania - BazTech

1

Analysis of abnormal vibrations of crude oil efflux pumps using Ansys

Wang Tianqi, Xie Lei, Yu Hongsheng, Wei Xiuliang, Dong Pengmin, Zhao Tianyi

Journal of Theoretical and Applied Mechanics

|

2023

|

Vol. 61 nr 1

23--36

EN

In this study, abnormal vibrations of 1 pump fluid in a crude oil efflux station in the Changqing Oilfield was investigated. Kinetic simulation was applied to flow fields in the crude oil efflux pump using Ansys to determine trends of the impeller static pressure, speed, total pressure, wall pressure of the impeller, outlet pressure and pressure on the pump shell and to identify the reasons behind the abnormal vibrations. The results indicated that the axial vibration amplitude of the pump could be reduced from 1.3mm down to 0.68mm if the operation parameters of the external control oil pump were set as 2500-2550r/min and 325-335m3/h, respectively.

2

Modelling of strengthening of concrete beams with FRP in Ansys software

Kowalski Damian, Selejdak Jacek

Materiały Budowlane

|

2022

|

nr 11

188--191

EN

The purpose of this article is to confirm an accuracy of Cohesive Zone Model (CZM) implemented in Ansys for modelling concrete beams strengthened with fiber reinforced polymer (FRP) tapes. Only mode II of debonding was taken into account, which is sufficient for a case of bent beam strengthened with FRP tape glued to its bottom. Results show satisfying coincidence of used model with experimental data and therefore confirm usefulness of CZM for solving the above mentioned problems.

PL

Celem artykułu jest weryfikacja dokładności modelu Cohesive Zone Model (CZM), zaimplementowanego w programie Ansys, w modelowaniu numerycznym belek żelbetowych wzmacnianych taśmami z polimerów zbrojonych włóknami (FRP). Wzięto pod uwagę jedynie postać II utraty przyczepności, co jest wystarczające w przypadku belek zginanych wzmocnionych taśmą przyklejoną do ich spodu. Wyniki pokazują zadowalającą zgodność użytego modelu z danymi eksperymentalnymi i tym samym potwierdzają użyteczność CZM do rozwiązywania ww. zagadnień.

3

Numerical simulation of flow through microchannels of technical equipment with triangular and rectangular elements of roughness

Kmiotek Małgorzata, Iwan Tomasz

Technologia i Automatyzacja Montażu

|

2021

|

nr 4

16--23

PL

Celem pracy jest określenie wpływu chropowatej powierzchni na przepływ płynu w mikrokanałach stosowanych w różnych mikrourządzeniach technicznych złożonych wyrobów. Rozpatrywano dwuwymiarowy osiowo-symetryczne mikrokanały o przekroju kołowym. Chropowatość została zasymulowana jako proste figury geometryczne tj. trójkąt i prostokąt o różnej wysokości h i różnej odległości s między sobą. Równania przepływowe zostały rozwiązane za pomocą oprogramowania Ansys/Fluent. Przeprowadzana jest analiza linii prądu w celu zbadania przepływów w strefie recyrkulacji za elementami chropowatości. Stwierdzono, że współczynnik tarcia wzrasta wraz ze wzrostem wysokości elementów chropowatych. Współczynnik tarcia jest większy dla elementów prostokątnych niż trójkątnych i zmniejsza się wraz ze zmianą geometrii elementu. Straty tarcia maleją wraz ze wzrostem liczby Reynoldsa. Autorzy wskazują, że w produkcji mikrokanałów złożonych wyrobów do modelowania chropowatości zaleca się używać elementów trójkątnych.

EN

This paper presents a computational study on an influence of a rough surface on the fluid flow in a microchannel used in various technical microdevices of complex products. Two-dimensional axially symmetrical microchannels with a circular cross-section were considered. The fluid flow were simulated as simple geometric figures, i.e. a triangle and a rectangle with different height h and different distance s between each other. The flow equations were solved with Ansys / Fluent software. A streamline analysis is performed to investigate the flows in the recirculation zone behind the roughness elements. It was found that the friction factor increases with increasing height of rough elements. The coefficient of friction factor is greater for rectangular elements than for triangular elements, and decreases as the geometry of the element changes. Friction factor decreases as the Reynolds number increases. The authors indicate that in the production of microchannels of complex products, it is recommended to use triangular elements to model roughness.

4

Diagnostics of the strength and stiffness of the loader carrier system structural elements in terms of thinning of walls by numerical methods

Orobey Viktor, Nemchuk Oleksii, Lymarenko Oleksandr, Piterska Varvara, Sherstiuk Olha, Romanov Oleksandr, Tkachuk Kateryna

Diagnostyka

|

2021

|

Vol. 22, No. 3

73--81

EN

Modern gantry cranes are an indispensable element of large industrial and transport enterprises. Port handling equipment is operated under conditions of complex spatial loading of varying intensity, as well as under conditions when the walls of structural elements are thinned in the crane carrier system. During the operation of handling equipment in ports, at construction sites, in machine-building industries, in addition to the external load, aggressive media act on the carrier system elements, which leads to various types of wear: corrosive, abrasive and mechanical. Monitoring of the state of handling equipment structures is a very important task of diagnosing the state of the material of elements of the carrier system of cranes and transporting machines. An important and urgent scientific and technical problem of taking into account the influence of aggressive environment on the stress-strain state of the metal structures of gantry cranes is considered. It is noted that during corrosion, a significant thinning of the walls of structural elements occurs. The safety of crane operation requires this factor to be taken into account. It is proposed to use modern numerical methods for this, i.e. the boundary element method (BEM) and the finite element method (FEM). The implementation of these methods is performed in the Matlab programming and modeling environment (BEM), and the FEM is used in the Ansys package. In accordance with the technologies of these methods, the design diagrams of the lower girders and the crane structure as a whole were formed. Exact models of strain of crane elements during transverse bending and constrained torsion are given. Calculations of the stressstrain state of the crane metal structures have been performed. On the basis of a preliminary field study, a numerical model is proposed for diagnosing the strength and stiffness characteristics of the carrier system of handling equipment using the BEM and FEM, which has never been used in the world. Conclusions are drawn about the influence of the thinning of the walls of metal structures on the values of normal and tangential stresses.

5

Modeling of Compression Test of Natural Fiber Composite Sections

Ryzińska Grażyna, Janowski Grzegorz, Bąk Łukasz

Advances in Science and Technology. Research Journal

|

2021

|

Vol. 15, no 2

138--147

EN

In recent years, there has been an increasing interest in composite materials reinforced with natural fibers. Due to the easy and cheap methods of obtaining raw materials, the possibility of recycling, biodegradability, production and processing safe for health, such materials can be a good alternative to composite materials reinforced with glass or carbon fibers. However, due to the lower mechanical properties of natural composites, their use as construction materials is still limited. Nevertheless, natural fiber composites have characteristics that can be used in structural applications as long as the mechanical behavior is well understood, reliable and predictable. The paper presents the results of numerical calculations of the compression process of a composite reinforced with a fabric made of flax and jute fibers (trade names: Biotex Flax 400g/cm2 and Biotex Jute 400 g/cm2) on a basis of Kinetix R240 epoxy resin. The data necessary for the numerical analysis were calculated in the Digimat software using the Double Inclusion micromechanical model, while the simulations of compression of the details were carried out in the Ansys software. Sections with different number of layers were tested. The results were compared with the experiment. Buckling forces obtained in the numerical analysis are nearby experimental results. Two types of C – section buckling modes were obtained and they consisted of two or three half-waves of buckling.

6

Simulation tests of selected gas flow parameters through combustion engine valves

Andrych-Zalewska Monika

Combustion Engines

|

2020

|

R. 59, nr 4

21--28

EN

The article presents the numerical analysis of a single-cylinder gasoline engine with indirect injection and spark ignition. The goal is to recognize and analyze gas flow through inlet and outlet valves and channels. These data were obtained from the simulation of a four-cycle engine cycle without combustion of the fuel-air mixture. The simulation was carried out in ANSYS, using a dedicated IC Engine module. After the simulation, the result was analyzed on the cross-sectional plane of both the valves and the combustion chamber. This method provided the necessary and concise representation of the flow characteristics. Five separate stages are presented – two describing the different displacement of the valve for each inlet and exhaust stroke and one representing the phenomenon of overlapping. The type of flow, its speed and tendency to create turbulence are described.

7

Modelling of a rotor with gyroscopic coupling in a rotating reference frame using Ansys and Matlab

Kozioł Mateusz

Vibrations in Physical Systems

|

2019

|

Vol. 30, nr 2

art. no. 2019220

EN

The work presents a method that expands Ansys capabilities and allows for studying the dynamics of rotors with significant gyroscopic coupling in reference to rotating coordinates. The analyses of rotors in the rotating reference frame are less common, and in FEM software some limitations in such cases can be observed. There are specialised rotors for which the use of a non-inertial reference frame is inevitable. The current work proposes a solution. In the presented method, Ansys is used to generate and export systems matrices so that the manual creation of an FE model is unnecessary. The rest of the operations are realised in Matlab. A simple numerical example is presented to clarify all the steps and a more complex example concludes the paper.

8

Noise and vibration analysis of a distribution transformer

Marcsa Dániel

Przegląd Elektrotechniczny

|

2019

|

R. 95, nr 12

172--175

EN

Transformer noise is a significant contribution to unwanted ambient noise, especially in the vicinity of the electrical transmission facility. It is therefore very important to get to know the mechanism of noise generation of the distribution transformer. As outcomes of this work, a finite element based multiphysics model is presented which provides a convenient and efficient toolchain for simulating the transformer sound emission mechanism. Finally, the operation of modelling chain is presented on a 200kVA distribution transformer simulation.

PL

Hałas transformatora ma znaczący wpływ na niepożądany hałas otoczenia, zwłaszcza w pobliżu instalacji przesyłowej prądu elektrycznego. Z tego powodu ważnym jest poznanie mechanizmu generowania szumu transformatora rozdzielczego. Jako wynik tej pracy przedstawiono model transformatora rozdzielczego 200 kVA oparty na analizie elementów skończonych, który zapewnia wygodny i wydajny zestaw narzędzi do symulacji mechanizmu emisji dźwięku z analizowanego urządzenia.

9

CFD analysis of the Ferrari 348 GTC intake system

Andrych-Zalewska Monika, Wielki Łukasz, Ziora Krzysztof

Autobusy : technika, eksploatacja, systemy transportowe

|

2019

|

R. 20, nr 6

128--133

EN

The article presents CFD (Computational Fluid Dynamics) analysis of the intake system of a Ferrari 348 GTC sports car. With this system, an adequate amount of air is supplied relative to the current demand for fuel combustion. The air demand of a given engine was determined, then analyzes were carried out. The article contains an analysis of the velocity distribution: total velocities, angular velocities and static pressure distribution. In addition, local velocity and flow in the filtration chamber were determined along with the flow directions and returns as well as power lines. The cycle impact on the temperature, locations of the highest speed drop, increase in turbulence, the largest pressure differences, and modulus of elasticity were determined. This information allows to assess whether there are no unwanted phenomena occurring in the system, such as flow disturbances. The Ansys Fluent software was used for analysis.

PL

W artykule przedstawiono analizę CFD (Computational Fluid Dynamics) układu dolotowego samochodu sportowego Ferrari 348 GTC. W tym systemie dostarczana jest odpowiednia ilość powietrza w stosunku do bieżącego zapotrzebowania na spalanie paliwa. Określono zapotrzebowanie na powietrze dla danego silnika, a następnie przeprowadzono analizy. Artykuł zawiera analizę rozkładu prędkości: prędkości całkowite, prędkości kątowe i rozkład ciśnienia statycznego. Dodatkowo wyznaczono lokalną prędkość i przepływ w komorze filtracyjnej wraz z kierunkami przepływu i powrotami oraz liniami energetycznymi. Oceniono wpływ cyklu na temperaturę, lokalizację największego spadku prędkości, wzrost turbulencji, największe różnice ciśnień i moduł sprężystości. Informacje te pozwalają ocenić, czy w systemie nie występują niepożądane zjawiska, takie jak zakłócenia przepływu. Do analizy wykorzystano oprogramowanie Ansys Fluent.

10

Weight reduction of motorcycle frame by topology optimization

Bala Manikandan C., Balamurugan S., Balamurugan P., Lionel Beneston S.

Journal of Achievements in Materials and Manufacturing Engineering

|

2018

|

Vol. 91, nr 2

67--77

EN

Purpose: of this paper is to improve the fuel efficiency of electrical motorcycle by reducing the weight of its frame without affecting the basic functionalities, dimensions and performance. Design/methodology/approach: Weight reduction of the frame was achieved by topology optimization technique. Initially the load and stresses acting on the frame was studied. Material of the frame was chosen as Aluminium and the frame was geometrically modelled using Autodesk Fusion 360. With the help of ANSYS AIM 18.2, weight of the frame was optimized by the design modifications suggested by the concept of topology optimization, for the corresponding loads and stresses induced on it. It was observed that the stress induced on the modified design was lesser than that of respective permissible yield stress of the frame material. After optimization, the weight of the frame was reduced from 3.0695 kg to 2.215 kg with the weight reduction of 27.84%. The weight reduction shows that the topology optimization is an effective technique, without compensate the performance of the frame. Approach used in the paper for the weight reduction of the frame is the topology optimization. The modelled frame was topology optimized by using ANSYS 18.2. After the topology optimization, the regions where the metal removal is possible, for weight reduction was identified. Findings: In this paper, the motor cycle frame was optimized and weight of the frame was reduced from 3.065 kg to 2.215 kg. Weight reduction of 27.84% was achieved without compensating the performance. Research limitations/implications: All the components of the automobile may be topology optimized for the weight reduction, thereby improving the fuel efficiency. Innovative design/Improvement in design also possible. Practical implications: By reducing the weight of the frame, weight of the automobile also reduces. Reduction in weight of the automobile leads to improved fuel efficiency. Originality/value: Weight of the motorcycle frame reduced by topology optimization. The regions of material removal at the frame, without compensating the performance was identified.

11

Simplified design equation for web tapered I-sections using finite element modeling

Rameshbabu C., Prabavathy S.

Archives of Civil Engineering

|

2018

|

Vol. 64, nr 3

57--66

EN

The web-tapered I-columns have the capacity to resist the flexural buckling and lateral torsional buckling at a particular location where as in the rest of the member the capacity is lower. There needs a focusing on the nonprismatic members, to find the buckling capacity and standard procedures are to be framed in Indian Code IS 800:2007. This exploratory research explores simulated finite element models covering a total of 60 web tapered column sections having taper ratios (h2/h1) from 1.0 to 3.0 using FEA software ANSYS17.2. With an elaborate Eigenvalue buckling analysis, this research has come up with newer design equation for calculating the buckling load of web tapered I columns. This novel equation could predict the buckling stress for any taper ratio of web tapered I column of any length.

12

Development and manufacturing of casting technology for crawler vehicle suspension used in wetlands

Małysza M., Kowalski P., Wańczyk K., Gil A., Dziedzic S., Żuczek R.

Prace Instytutu Odlewnictwa

|

2017

|

Vol. 57, no. 4

351--356

EN

The modern designing techniques and development procedures requires the use of advanced integrated methods. That kind of approach requires the involvement of series of steps which leads to the logical work stream known as Integrated Computational Material Engineering. The steps involve the design and evaluation process in the virtual environment of CAD/CAE and simulation software. The use of simulation software allows for online optimization of the shape and properties of designed part. The publication presents a design and manufacturing process of a component of the larger assembly of the chassis of heavy-duty machine. Established methodology includes the analysis of the initial geometry of the part of the heavy vehicle used in difficult wetland environmental conditions.

13

Numerical analysis of the orthotropic sample for conductivity tests

Tokarski Mieszko

Archiwum Instytutu Techniki Cieplnej

|

2016

|

Vol. 1

153--204

EN

This work describes the development of a program based on the Finite Element Method for the calculation of a temperature field in orthotropic sample with use of the Neumann's Boundary Condition. Such a program has been created for the purposes of the project carrying out in the Intitute of Thermal Technology in Gliwice, Poland. It is an important part of the fully – automated algorithm for determining the sample's thermal conductivity by fitting numerically obtained temperature field with its counterpart provided by the measurements. Because of the specific nature of the measurement process as well as the main algorithm itself, the developed program is characterized by high efficiency (comparable to Ansys), sufficient accuracy and preparation for cooperation with the mentioned before fully – automated algorithm. Most important features of the program are: module for geometry data import (data is provided by the Ansys), module for the results export, the two control text files for easy management by external procedures, logging and error reporting module.

PL

W pracy tej opisano proces tworzenia pogramu opartego na Metodzie Elementów Skończonych a służącego do obliczania pola temperatury w ortotropowej próbce z wykorzystaniem warunku brzegowego Neumann'a. Program ten został stworzony na potrzeby projektu prowadzonego w Instytucie Techniki Cieplnej w Gliwicach. Stanowi on ważną część zautomatyzowanej procedury mającej wyznaczać współczynnik przewodzenia ciepła badanej próbki poprzez dopasowanie rozkładu temperatury otrzymanego na drodze obliczeń numerycznych z rozkładem temperatury otrzymanym z pomiarów. Z racji specyfiki pomiarów oraz samej procedury sterującej całą analizą, stworzony program charakteryzuje się dużą wydajnością porównywalną do wydajności Ansysa (dla tego samego przypadku), wystarczającą dokładnością oraz przygotowaniem do sprzęgnięcia z głównym algorytmem. Najważniejszymi cechami tego programu są: moduł do importu geometrii z Ansysa, moduł do eksportu danych dla algorytmu sterującego, dwa pliki tekstowe umożliwiające łatwe zarządzanie tym kodem (zwłaszcza w przypadku sterowania przez zewnętrzny program), logowanie działania programu oraz raportowanie o błędach.

14

Procesy mikroszlifowania : wybrane problemy modelowania i badań eksperymentalnych

Kacalak W., Tandecka K.

Stal, Metale & Nowe Technologie

|

2015

|

nr 11-12

18--22

PL

W pracy przeanalizowano procesy mikroszlifowania, opisano probabilistyczne cechy tych procesów oraz kumulowanie zakłóceń. Opisano przyczyny zmienności zagłębień ostrzy skrawających w materiał obrabiany. W celu bardziej wnikliwego poznania procesów mikroszlifowania przeprowadzono badania z wykorzystaniem mikroskopu SEM, mikrowiórów o charakterystycznej schodkowej budowie, jako produktów procesów mikroszlifowania różnych materiałów, w tym stopu tytanu Grade 5. Przeprowadzono badania modelowe w środowisku Ansys nieciągłości procesów skrawania w zależności od właściwości obrabianego materiału.

EN

The study has analyzed microgrinding processes. The article describes a probabilistic characteristics of these processes and the accumulation of interference. The paper describes the causes of variation of cutting grain cavities in the workpiece. In order to better understand the grinding processes, a study has been carried out using SEM and microchips with a characteristic segmentation structure, as a product of grinding of various materials, including Grade 5 titanium alloy. Model studies have been conducted in the ANSYS environment of discontinuity removal processes according to the properties of the workpiece.

15

Analiza rozkładu sił w pasywnych łożyskach magnetycznych

Stępień M., Gajek Ł., Grzesik B.

Mechanik

|

2011

|

R. 84, nr 10

782-787

PL

Przedstawiono wyniki modelowania rozkładu sił w pasywnych łożyskach magnetycznych zbudowanych z magnesów trwałych. Przedmiotem analizy są wartości i kierunki sił działających pomiędzy magnesami oraz rozkłady pola magnetycznego wokół magnesów. Jako referencyjną przedstawiono analizę układu łożyska magnetycznego znanego jako Levitron (R). Następnie przebadano dwie konstrukcje łożysk magnetycznych zbudowanych z magnesów pierścieniowych oraz płytkowych odpowiednio ułożonych. Badane były łożyska o średnicach zewnętrznych do 15 mm oraz siłach oddziaływania (udźwigu) do 10 N, stosowane jako zawieszenie małych systemów napędowych. Analizę przeprowadzono w oparciu o dwuwymiarowe modele osiowo-symetryczne zrealizowane w ANSYS APDL. Modele bazowały na elemencie elektromagnetycznym PLANE233. Wyznaczono charakterystyki sił oddziaływania w funkcji wzajemnego położenia elementów łożyska oraz wybranych gabarytów konstrukcyjnych jako parametru.

EN

Presented is a method to build models of the force distribution patterns in passive magnet bearings composed from permanent magnets. Objective of the review are the magnitudes and directions of forces acting between the magnets and the distribution of magnetic field patterns surrounding the magnets. Analytical work has been carried out basing on the two dimensional, axially symmetric models developed in ANSYS APDL.