This paper presents the modeling, calculations and analysis using Finite Element Method (FEM)of t... more This paper presents the modeling, calculations and analysis using Finite Element Method (FEM)of the rubber tyred container stacking crane in ports. All elements of the rubber tyred container stacking crane was modeled and made its calculations. Although stress and deformation analysis of crane bridge girder and buckling analysis of the crane legs are performed. ANSYS Workbench program has been used to perform the finite element method. In addition, rubber tyred container stacking crane has been modeled by using Autodesk INVENTOR 2010 program. Stress, deformation and buckling analysis have been compared with calculations. The aim of this work is to consider the new possibilities and the gains of finite element method over conventional calculation methods on rubber tyred container stacking crane design. When we examine the results, deformation formed on crane system is not significant when considering geometric dimensions of model and it was observed that the stress values remain unde...
For the safe and economic engineering design of conveyor belt systems, it is essential to study a... more For the safe and economic engineering design of conveyor belt systems, it is essential to study and determine the critical velocities given by the eigenvalues of the moving conveyor belts subjected to constant axial force. As in many other vibration characteristics, the eigenvalues and related natural frequencies of the belt under investigation also depend on the magnitude of the belt velocity and the axial force. For any value of the constant axial force, natural frequencies gradually decrease when the belt velocity increase and become zero for some velocity values which are defined as critical velocities. In this paper, the critical velocities of free vibrations of conveyor belts have been investigated analytically when the belt is fixed or simply supported at both ends. For the visual representation of the results, frequency values as a function of belt velocity and longitudinal force values are also given in graphical forms.
In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses ... more In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses on the prevention of crane damage which occurs due to heavy loads. In this study, the strength of the tower crane parts has been calculated according to FEM and DIN standards .In order to accomplish finite element analysis method, the tower crane parts are modelled one by one. Afterwards, the stress analysis of the crane parts are accomplished with ANSYS software considering the crane's self weight, payload, hook weight, trolley weight and the dynamic loads. As a conclusion, the results obtained from finite element method and analytical calculation are compared.
For handling of partial or continuous goods, belt conveyors are very efficient way. Belt conveyor... more For handling of partial or continuous goods, belt conveyors are very efficient way. Belt conveyors are used in mining, iron and steel plants, thermal power plants, ore, coal, limestone, sinter transmission, automotive and the other sectors. There are several factors that have to be taken into consideration when a belt conveyor being designed. That means belt conveyor design process requires repetitive strength calculations. But analytical calculations are not capable of determine to entire stresses which occured at whole body. During the design process, time can be saved with the assistance of Finite Element Method. In this study; as a result, it has been seen that, F.E.M is the most practical method which can be utilized during belt conveyor design process.
In this study, fatigue life of axial loaded wire rope strands are investigated in computer enviro... more In this study, fatigue life of axial loaded wire rope strands are investigated in computer environment. For this purpose generated models about finite element analysis of wire ropes, conducted researches and fatigue condition of wire ropes are investigated. The condition required in order not to contact outer wires with each other is expressed with the purpose of modeling simple strand and the generated model is confirmed by using defined geometrical values. 3D solid model of 1+6 simple strand used in finite element analysis is generated in CAD software SolidWorksTM. Finite element analysis of simple strand is done by FEA software ANSYSTM. Fatigue analyses are done by ANSYS/Workbench for experimental groups generated by using 3 different parameters which are strand length, helix angle and force range. Graphics, which show fatigue life variance of axial loaded 1+6 simple strand, are created by obtaining fatigue life distribution according to Goodman approach.
Today in the world, Turkey has a great role in ship building industry. Shipyards work continuousl... more Today in the world, Turkey has a great role in ship building industry. Shipyards work continuously and build a ship in almost every three months. In order to achieve this, a lot of cranes in different tonages are needed to lift and move the ship parts. Crane Projects are designed in need of the shipyards. While designing the crane geometry, hoisting load, the lifting height and the situation of the area where the crane will work should be considered. First of all, the main characteristics as the height of the crane, the distance between the rails, the lifting height, speed of the crane and speed of the trolley are determined. After that, the geometry of all parts, and the features of the power and transmission components are specified. The construction geometry is analyzed by Abaqus Software program. First, three dimensional geometry of the crane is built with a CAD program, then this geometry is modelled by using finite elment method. The crane is tested under the effects of its se...
Today in the world, Turkey has a great role in ship building industry. Shipyards work continuousl... more Today in the world, Turkey has a great role in ship building industry. Shipyards work continuously and build a ship in almost every three months. In order to achieve this, a lot of cranes in different tonages are needed to lift and move the ship parts. Crane Projects are designed in need of the shipyards. While designing the crane geometry, hoisting load, the lifting height and the situation of the area where the crane will work should be considered. First of all, the main characteristics as the height of the crane, the distance between the rails, the lifting height, speed of the crane and speed of the trolley are determined. After that, the geometry of all parts, and the features of the power and transmission components are specified. The construction geometry is analyzed by Abaqus Software program. First, three dimensional geometry of the crane is built with a CAD program, then this geometry is modelled by using finite elment method. The crane is tested under the effects of its se...
Today Geometric Dimensioning and Tolerancing (GD&T) is an essential subject of the mechanical and... more Today Geometric Dimensioning and Tolerancing (GD&T) is an essential subject of the mechanical and manufacturing engineering curricula. GD&T is a universal design engineering language that is being used to capture and transmit the designer’s intent to all activities in the product cycle. GD&T has been developed by the International Organization for Standardization (ISO) and translate to Turkish by Turkish Standards Institute (TSE), and many other national standards. This language has also been adopted by many car manufacturing enterprises. The purpose of this paper is to discuss some problems of Geometric Dimensioning and Tolerancing instruction in design graphics courses and present new teaching alternatives that might solve some limitations. This paper focuses on design graphics courses that currently used at Istanbul Technical University for Mechanical Engineering Faculty students. Teaching alternatives was a response to some problems that we were facing in terms of student motiva...
Abstract: For the safe and economic engineering design of conveyor belt systems, it is essential ... more Abstract: For the safe and economic engineering design of conveyor belt systems, it is essential to study and determine the critical velocities given by the eigenvalues of the moving conveyor belts subjected to constant axial force. As in many other vibration characteristics, the eigenvalues and related natural frequencies of the belt under investigation also depend on the magnitude of the belt velocity and the axial force. For any value of the constant axial force, natural frequencies gradually decrease when the belt velocity increase and become zero for some velocity values which are defined as critical velocities. In this paper, the critical velocities of free vibrations of conveyor belts have been investigated analytically when the belt is fixed or simply supported at both ends. For the visual representation of the results, frequency values as a function of belt velocity and longitudinal force values are also given in graphical forms.
In the present investigation, the effects of crack related features such as crack position, crack... more In the present investigation, the effects of crack related features such as crack position, crack height, as well as the mass and the velocity of the moving load on the vertical deflection of the damaged beams under the effect of moving load are analyzed. The governing equations of motion for cracked beams subjected to moving load have been obtained and they have been solved by applying the Duhamel integral technique. The responses of the structures due to the consequences of crack depth, crack location, moving speed, and moving mass are also determined. At first, the results between undamaged and damaged beams have been compared. Then, a comparative study between double and triple cracked beams has been conducted in order to understand the consequence of third crack on the dynamic characteristics of the beam. The mass-beam structural system has been modelled mathematically with the presence of open and transverse cracks with different crack configuration (crack depth and locations)...
In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses ... more In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses on the prevention of crane damage which occurs due to heavy loads. In this study, the strength of the tower crane parts has been calculated according to FEM and DIN standards.In order to accomplish finite element analysis method, the tower crane parts are modelled one by one. Afterwards, the stress analysis of the crane parts are accomplished with ANSYS software considering the crane’s self weight, payload, hook weight, trolley weight and the dynamic loads. As a conclusion, the results obtained from finite element method and analytical calculation are compared.
This paper presents the modeling, calculations and analysis using Finite Element Method (FEM)of t... more This paper presents the modeling, calculations and analysis using Finite Element Method (FEM)of the rubber tyred container stacking crane in ports. All elements of the rubber tyred container stacking crane was modeled and made its calculations. Although stress and deformation analysis of crane bridge girder and buckling analysis of the crane legs are performed. ANSYS Workbench program has been used to perform the finite element method. In addition, rubber tyred container stacking crane has been modeled by using Autodesk INVENTOR 2010 program. Stress, deformation and buckling analysis have been compared with calculations. The aim of this work is to consider the new possibilities and the gains of finite element method over conventional calculation methods on rubber tyred container stacking crane design. When we examine the results, deformation formed on crane system is not significant when considering geometric dimensions of model and it was observed that the stress values remain unde...
For the safe and economic engineering design of conveyor belt systems, it is essential to study a... more For the safe and economic engineering design of conveyor belt systems, it is essential to study and determine the critical velocities given by the eigenvalues of the moving conveyor belts subjected to constant axial force. As in many other vibration characteristics, the eigenvalues and related natural frequencies of the belt under investigation also depend on the magnitude of the belt velocity and the axial force. For any value of the constant axial force, natural frequencies gradually decrease when the belt velocity increase and become zero for some velocity values which are defined as critical velocities. In this paper, the critical velocities of free vibrations of conveyor belts have been investigated analytically when the belt is fixed or simply supported at both ends. For the visual representation of the results, frequency values as a function of belt velocity and longitudinal force values are also given in graphical forms.
In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses ... more In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses on the prevention of crane damage which occurs due to heavy loads. In this study, the strength of the tower crane parts has been calculated according to FEM and DIN standards .In order to accomplish finite element analysis method, the tower crane parts are modelled one by one. Afterwards, the stress analysis of the crane parts are accomplished with ANSYS software considering the crane's self weight, payload, hook weight, trolley weight and the dynamic loads. As a conclusion, the results obtained from finite element method and analytical calculation are compared.
For handling of partial or continuous goods, belt conveyors are very efficient way. Belt conveyor... more For handling of partial or continuous goods, belt conveyors are very efficient way. Belt conveyors are used in mining, iron and steel plants, thermal power plants, ore, coal, limestone, sinter transmission, automotive and the other sectors. There are several factors that have to be taken into consideration when a belt conveyor being designed. That means belt conveyor design process requires repetitive strength calculations. But analytical calculations are not capable of determine to entire stresses which occured at whole body. During the design process, time can be saved with the assistance of Finite Element Method. In this study; as a result, it has been seen that, F.E.M is the most practical method which can be utilized during belt conveyor design process.
In this study, fatigue life of axial loaded wire rope strands are investigated in computer enviro... more In this study, fatigue life of axial loaded wire rope strands are investigated in computer environment. For this purpose generated models about finite element analysis of wire ropes, conducted researches and fatigue condition of wire ropes are investigated. The condition required in order not to contact outer wires with each other is expressed with the purpose of modeling simple strand and the generated model is confirmed by using defined geometrical values. 3D solid model of 1+6 simple strand used in finite element analysis is generated in CAD software SolidWorksTM. Finite element analysis of simple strand is done by FEA software ANSYSTM. Fatigue analyses are done by ANSYS/Workbench for experimental groups generated by using 3 different parameters which are strand length, helix angle and force range. Graphics, which show fatigue life variance of axial loaded 1+6 simple strand, are created by obtaining fatigue life distribution according to Goodman approach.
Today in the world, Turkey has a great role in ship building industry. Shipyards work continuousl... more Today in the world, Turkey has a great role in ship building industry. Shipyards work continuously and build a ship in almost every three months. In order to achieve this, a lot of cranes in different tonages are needed to lift and move the ship parts. Crane Projects are designed in need of the shipyards. While designing the crane geometry, hoisting load, the lifting height and the situation of the area where the crane will work should be considered. First of all, the main characteristics as the height of the crane, the distance between the rails, the lifting height, speed of the crane and speed of the trolley are determined. After that, the geometry of all parts, and the features of the power and transmission components are specified. The construction geometry is analyzed by Abaqus Software program. First, three dimensional geometry of the crane is built with a CAD program, then this geometry is modelled by using finite elment method. The crane is tested under the effects of its se...
Today in the world, Turkey has a great role in ship building industry. Shipyards work continuousl... more Today in the world, Turkey has a great role in ship building industry. Shipyards work continuously and build a ship in almost every three months. In order to achieve this, a lot of cranes in different tonages are needed to lift and move the ship parts. Crane Projects are designed in need of the shipyards. While designing the crane geometry, hoisting load, the lifting height and the situation of the area where the crane will work should be considered. First of all, the main characteristics as the height of the crane, the distance between the rails, the lifting height, speed of the crane and speed of the trolley are determined. After that, the geometry of all parts, and the features of the power and transmission components are specified. The construction geometry is analyzed by Abaqus Software program. First, three dimensional geometry of the crane is built with a CAD program, then this geometry is modelled by using finite elment method. The crane is tested under the effects of its se...
Today Geometric Dimensioning and Tolerancing (GD&T) is an essential subject of the mechanical and... more Today Geometric Dimensioning and Tolerancing (GD&T) is an essential subject of the mechanical and manufacturing engineering curricula. GD&T is a universal design engineering language that is being used to capture and transmit the designer’s intent to all activities in the product cycle. GD&T has been developed by the International Organization for Standardization (ISO) and translate to Turkish by Turkish Standards Institute (TSE), and many other national standards. This language has also been adopted by many car manufacturing enterprises. The purpose of this paper is to discuss some problems of Geometric Dimensioning and Tolerancing instruction in design graphics courses and present new teaching alternatives that might solve some limitations. This paper focuses on design graphics courses that currently used at Istanbul Technical University for Mechanical Engineering Faculty students. Teaching alternatives was a response to some problems that we were facing in terms of student motiva...
Abstract: For the safe and economic engineering design of conveyor belt systems, it is essential ... more Abstract: For the safe and economic engineering design of conveyor belt systems, it is essential to study and determine the critical velocities given by the eigenvalues of the moving conveyor belts subjected to constant axial force. As in many other vibration characteristics, the eigenvalues and related natural frequencies of the belt under investigation also depend on the magnitude of the belt velocity and the axial force. For any value of the constant axial force, natural frequencies gradually decrease when the belt velocity increase and become zero for some velocity values which are defined as critical velocities. In this paper, the critical velocities of free vibrations of conveyor belts have been investigated analytically when the belt is fixed or simply supported at both ends. For the visual representation of the results, frequency values as a function of belt velocity and longitudinal force values are also given in graphical forms.
In the present investigation, the effects of crack related features such as crack position, crack... more In the present investigation, the effects of crack related features such as crack position, crack height, as well as the mass and the velocity of the moving load on the vertical deflection of the damaged beams under the effect of moving load are analyzed. The governing equations of motion for cracked beams subjected to moving load have been obtained and they have been solved by applying the Duhamel integral technique. The responses of the structures due to the consequences of crack depth, crack location, moving speed, and moving mass are also determined. At first, the results between undamaged and damaged beams have been compared. Then, a comparative study between double and triple cracked beams has been conducted in order to understand the consequence of third crack on the dynamic characteristics of the beam. The mass-beam structural system has been modelled mathematically with the presence of open and transverse cracks with different crack configuration (crack depth and locations)...
In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses ... more In heavy industries, tower cranes are used to lift and carry heavy materials. This study focuses on the prevention of crane damage which occurs due to heavy loads. In this study, the strength of the tower crane parts has been calculated according to FEM and DIN standards.In order to accomplish finite element analysis method, the tower crane parts are modelled one by one. Afterwards, the stress analysis of the crane parts are accomplished with ANSYS software considering the crane’s self weight, payload, hook weight, trolley weight and the dynamic loads. As a conclusion, the results obtained from finite element method and analytical calculation are compared.
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