Design Optimization of EOT Crane Bridge

International Journal of Engineering Research and Technology (IJERT), 2013

https://www.ijert.org/design-optimization-of-overhead-eot-crane-box-girder-using-finite-element-analysis https://www.ijert.org/research/design-optimization-of-overhead-eot-crane-box-girder-using-finite-element-analysis-IJERTV2IS70304.pdf The design optimization of an overhead crane with a double box girder has been proposed [6]. In this paper the design optimization of double box girder has been done and a comparative study of results of finite element analysis of a crane with 10 ton capacity and 12 m span length has been conducted. It is not possible for the real experimental studies to take into consideration the influence of the connections between the main beams and the rest parts of the construction, the influence of the longitudinal and transverse ribbings as well as the influence of the supports on the overall stressed state of the construction. Moreover, the researches that use for the majority of the test cases different strain measurements turn out to be quite hard and expensive. All these problems could be solved successfully by the use of computer modelling procedures. It is possible to perform 2D or 3D computer studies. The 2D computer studies give idea of the planar behaviour of the construction and lack the opportunity of showing the influence of supports or the connections of the construction. It is only the 3D models that could satisfy all the requirements for examining the general stressed state of the carrying metal construction. With regard to this, the creation of 3-D models for researching and analysing the behaviour of an overhead crane box girder, becomes the main goal of the present work. In the initial phase of the study, conventional design calculations proposed by Indian Standard Rules were performed. The crane design was modelled with solids, Loads and boundary conditions were applied to solid model. Assign material to the solid model. Finite Element meshes were generated from the solid model. After a comparison of the finite element analyses, and the conventional calculations, the analysis was found to give the most realistic results. As a result of this study, a design optimization for an overhead crane box girder has been done.

2013

Iranian Journal of Science and Technology: Transactions of Mechanical Engineering

IRJET, 2020

Gantry crane is one of the most necessary material handling equipment for major industries. But in recent years less attention has been thrown towards changes in design of Heavy Gantry Crane Bridges and its optimization. Since, Gantry cranes are critical material handling equipment, manufacturers takes less attention towards the changes in design for safety and security purpose. But, now the cost of structural steels continuously increasing, optimization of design becomes necessary. Gantry crane manufacturers are required to give better cost effective products to industry users. The objective of this paper is to optimize design and analyze the 550 ton of capacity Gantry crane with welded box section of Girder. The design optimization is made by altering the dimensions of gantry crane girder sections and also the position of crab on the Girder by keeping other parameters constant. This approach includes comparison of the existing analytical results to that of the data obtained by finite element analysis and simulation software. The Main focus of the work is to modify the existing design with reduced cross section dimensions of girder of gantry crane to minimize the material utilization and cost. Simultaneously, an improved design should provide more safe design. While stimulating Finite Element Methodology, we have taken into consideration Shear Stress, Total Deformation, Maximum Principal Stress and Minimum Principal Stress for design optimization. Optimization includes change in design parameters such as size and thickness of plates. Optimal girder so designed is efficient in respect of design technique and verified as cost-effective due to 8.39% weight reduction from existing design.

IMK – 14, Research&Development in Heavy Machinery, 2015

The paper considers the problem of design optimization of the box section of the single-girder bridge crane. Reduction of the girder mass is set as the objective function. The algorithm of generalized reduced gradient (GRG2 algorithm) was used as the methodology for determination of optimum geometrical parameters of the box section. The criteria of permissible stresses, local stability of plates, lateral stability of the girder, static deflection, dynamic stiffness and production feasibility (distance between the webs) were applied as the constraint functions. The optimization of the box section geometrical parameters was conducted for payloads and spans typical for single-girder bridge cranes.

Scientific Technical Review, 2022

The presented research deals with the optimal design of the main girder with an asymmetric box cross-section of the doublebeam bridge crane. The Moth-Flame Optimization algorithm (MFO) is used for solving this multicriteria optimization problem. This algorithm is a relatively new population-based metaheuristic method. The paper takes the following criteria as the constraint functions: strength, local stability of the girder plates (webs and top flange), local stability of the longitudinal stiffeners, global stability of the main girder, deflections, and period of oscillation. The justification of the proposed procedure is shown in one example of a real solution of the double-beam bridge crane. Significant savings in material were achieved in this research, within the range of 19.42 to 25.49%. The use of this algorithm enables the application of a very large number of variables and constraint functions, whereby the optimal values are obtained in a relatively short period.

7th International Scientific Conference On Defensive Technologies “OTEH 2016”, 2016

The paper considers the problem of optimization of the box section of the main girder of the single-girder bridge crane. Reduction of the area of the box cross section is set as the objective function. The algorithm of generalized reduced gradient (GRG2 algorithm) was used as the methodology for determination of optimum geometrical parameters of the box section. The criteria of permissible stresses, local stability of plates, lateral stability of the girder, static deflection, dynamic stiffness, minimum plate thickness and production feasibility (distance between the webs) were applied as the constraint functions. Verification of the used methodology was carried out through numerical examples and the comparison with some existing solutions of cranes was made. The comparative optimization results show changes of the box section optimum geometric values due to domestic standards or eurocodes.

XX International Conference on Material Handling, Construction and Logistics “MHCL'12”, 2012

The paper considers the problem of optimization of the box section of the main girder of the bridge crane for the case of placing the rail above the web plate. The method of Lagrange multipliers was used as the methodology for determination of optimum dependencies of geometrical parameters of the box section. The criteria of strength, local stability of plates, lateral stability of the girder, dynamic stiffness, deflection and cost effectiveness were simultaneously applied as the constraint functions. The results were obtained in explicit form, which is very favourable for discussion of solutions. Verification of the obtained results of geometrical parameters was carried out through numerical examples.

IMK–14, Research&Development in Heavy Machinery, 2012

The paper considers the problem of optimization of the box section of the main girder of the bridge crane with rail placed above vertical plate. Criteria of strength, local and lateral stability of the girder were applied as the constraint functions. In addition, an influence of production technology on obtained optimization results is shown through comparative analysis. Reduction of girder mass is set as the objective function and the method of Lagrange multipliers was used as the methodology. The comparative optimization results show changes of the box section optimum geometric values due to Euro code or domestic standard appliance. The significant recommendations for crane designers were made upon the comparative analysis of optimization results and existing solutions.

MTC AJ, 2020

In the structure of the bridge cranes, end carriages have very important functions and importance. These segments of the bridge crane structure must ensure the stable movement of the main girder of the bridge crane along the crane runway beam. For this reason, they also have a greater responsibility in the structural stability of the bridge crane, so the choice of the geometric characteristics of the cross-section of these segments is of great importance, which is reflected primarily in theirs stiffness, as well as the connection of these segments with the main girder of the bridge crane. In this research, the analysis and optimization of the box cross-section of the welded girder of end carriage will be carried out and the justification of this approach in terms of material savings will be justified. Examples of two single-girder bridge cranes in which are in exploitation will be used for the calculation. One metaheuristic algorithm will be used as a methodology for the optimization process, since such methods have been increasingly used lately, especially in engineering problems.