Determination of Design Parameters of Articulated Jib Systems of Portal Crane

Суглобов, Володимир Васильович; Tkachuk, Kateryna

doi:10.15802/stp2017/92618

Cited by 2 publications

(1 citation statement)

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“…Construction of the schematic design of forces at the maximum working loadings. Using dynamic and mathematical models of the boom system of the gantry crane [19], a dynamic analysis of the acting forces and their combinations under the working load of the crane was conducted.…”

Section: Geotechnical and Mining Mechanical Engineering Machine Buildingmentioning

confidence: 99%

Impact of stress concentration on reliability of metal structure elements of gantry cranes

Sahirov¹,

Tkachuk²,

Suglobov³

2022

Nauk. visn. nat. hirn. univ.

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Purpose. Analyzing the stress distribution in the metal structure of the gantry crane under the cyclic operation mode and identifying stress concentrators in the crane column to assess the survivability of the machine. Methodology. In order to achieve the objective, the methods employed included analytical calculation method, finite element method, as well as differential and integral calculus methods. To study the state of the metal structure of the gantry crane, namely the column, the program Solid Works and its application Simulation were used. Findings. Using the CAD/CAE-system, the loaded condition of the metal structure of the gantry crane was modeled and the maximum working loads were determined, and a calculated scheme of their operation was constructed. The method is presented for calculation of survivability of load-bearing elements of the crane taking into account coefficients of intensity and concentration of stresses which allow defining speed of growth of cracks in dangerous stress zones of a metal structure. Originality. The existing methods for designing crane metal structures gained their traction. The integrated technique for assessing crane reliability has been suggested for the first time. This technique is focused on estimating the survivability of components elements. For the first time solid-state models of the crane and its column have been developed; the analysis of the stress-strain state of the column was performed, maximum stresses were determined, stress concentration points in the metal structure of the column were identified and recommendations for improvement of stress zones were presented. Practical value. The presented method for assessing the reliability of metal structures of gantry cranes can be implemented in the practice of design organizations for the development, design of new gantry cranes and modernization of existing ones. The obtained results provide an opportunity to assess the accumulated damage in the elements of the metal structure, to predict the development of defects to a critical size, as well as to decide on the further operability of a gantry crane.

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Section: Geotechnical and Mining Mechanical Engineering Machine Buildingmentioning

confidence: 99%

Impact of stress concentration on reliability of metal structure elements of gantry cranes

Sahirov¹,

Tkachuk²,

Suglobov³

2022

Nauk. visn. nat. hirn. univ.

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Determination of the Varied Constructive Parameters for Balancing Units of Portal Cranes

Суглобов¹,

Ракша²,

Tkachuk³

2018

STP

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Purpose. The research was carried out to improve the design process of the balancing unit for portal crane. In order to achieve the purpose one should: 1) to develop a dynamic and mathematical model that allows describing the movement of balancing unit and the boom system of portal crane, when derricking; 2) to propose the way for determining and the methodology for calculating the array of variable design parameters of balancing units; 3) to calculate the optimal ratio of the beam mounting coordinates for balancing units and to study their influence on the imbalance of the portal crane boom system. Methodology. To determine the kinematic characteristics of the balancing unit links, dynamic and mathematical models, describing the movement of balance beam with counterweight when derricking, have been developed. The task of balancing boom systems of portal cranes is reduced to determining the design parameters of the device, which would provide balancing of the boom system on the entire range of derricking. It was also developed a methodology for calculating the acceptable varying design parameters of balancing units, taking into account the conditions of mobility, assemblability and the requirements for the values of unbalanced boom torque. Findings. Based on mathematical calculations and computer simulation the expediency of using the proposed methodology for determining the design parameters of balancing units has been scientifically substantiated. The developed array of variable data makes it possible to take into account the nature of balancing and optimize the design of counterbalancing devices and boom systems for portal cranes. The authors analyzed the influence of variable parameters on the generally accepted criteria for assessing the quality of the articulated boom system: the system's unbalance, the weight of counterweight, the indices of load and boom unbalanced moments. Originality. For the first time, a methodology for determining an array of variable data has been proposed. It makes it possible to form the array of rational design parameters of balancing units. It was developed a local program for complex optimization synthesis, which makes it possible to determine the optimum ratios of the balance beam coordinates, under which the conditions of balance and quality of the portal crane are satisfied. Practical value. The proposed methodology for determining the array of varying design parameters can be used in the development organizations for designing new and retrofitting the existing balancing units for portal cranes with articulated boom systems. The proposed methodology was tested at the launch of complex optimization synthesis with respect to cranes, the configuration of which ensures assemblability and mobility of the links of all systems.

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Determination of Design Parameters of Articulated Jib Systems of Portal Crane

Cited by 2 publications

References 1 publication

Impact of stress concentration on reliability of metal structure elements of gantry cranes

Impact of stress concentration on reliability of metal structure elements of gantry cranes

Determination of the Varied Constructive Parameters for Balancing Units of Portal Cranes

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