Design and deflection evaluation of a portal crane subjected to traction load

Abstract In this study, deflection values occurring on the main girder of a portal crane at various payloads were investigated theoretically, numerically and experimentally. The entire portal crane structure was analyzed on via a computer model in order to assess the reliability of the main girder in terms of deflection. Variations in deflection on the main girder were determined in accordance with load lifted and the crane trolley position. In addition, deflection values at critical points on the main girder of the portal crane were measured experimentally. Results indicate that maximum deflection value occurring on the main girder when the crane trolley was located at the middle of main girder were 1.34 times greater than the deflection value when the crane trolley was located at loading position 3.

Download Full-text

Investigation on endurance evaluation of a portal crane: experimental, theoretical and finite element analysis

Materials Testing ◽

10.1515/mt-2020-620405 ◽

2020 ◽

Vol 62 (4) ◽

pp. 357-364

Author(s):

Yusuf Aytaç Onur ◽

Hakan Gelen

Keyword(s):

Finite Element ◽

Critical Points ◽

Maximum Stress ◽

Strain Gages ◽

Finite Element Analyses ◽

Element Analysis ◽

Element Simulation ◽

Main Girder ◽

Stressed Component ◽

Portal Crane

Abstract In this study, the stress on portal crane components at various payloads has been investigated theoretically, numerically and experimentally. The portal crane was computer-aided modeled and finite element analyses were performed so that the most stressed points at the each trolley position investigated on the main girder could be determined. In addition, the critical points were marked on the portal crane, and strain gages were attached to the those critical points so that stress values could be experimentally determined. The safety factor values at different payloads were determined by using finite element simulation. Results indicate that the most stressed component in the examined portal crane is the main girder. Experimental results indicate that the maximum stress value on the main girder is 3.05 times greater than the support legs and 8.99 times larger than the rail.

Download Full-text

The Optimization Design on the Truss Girder of Portal Crane

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.562-564.697 ◽

2012 ◽

Vol 562-564 ◽

pp. 697-700

Author(s):

Xin Xiang Zhou ◽

Shu Jun Guo ◽

Yan Ling Tang ◽

Rong Liang Tian

Keyword(s):

Optimization Design ◽

Truss Structure ◽

Ansys Software ◽

Excellent Performance ◽

Main Girder ◽

Designing Method ◽

Volume Stress ◽

Optimal Designing ◽

Portal Crane

This paper takes grab type portal crane of a steel branch as the research object, its main girder is the truss structure. The truss girder is optimized with the ANSYS software, through which the size of the structure when the force of the whole truss is minimum can be found. A best plan is determined among many scheme to meet requirements of the design, and the required expenses is the smallest(such as weight, area, volume, stress, expenses, etc)that is the optimal designing scheme is the most effective solutions. The optimal designing method provides reliable reference for designing excellent performance crane.

Download Full-text

Study on Estimating Fatigue Life of Main Girder of Portal Crane

2018 Prognostics and System Health Management Conference (PHM-Chongqing) ◽

10.1109/phm-chongqing.2018.00199 ◽

2018 ◽

Cited By ~ 1

Author(s):

Xiangdong Li ◽

Xu Yan ◽

Fei Shuai ◽

Yicheng Shen

Keyword(s):

Fatigue Life ◽

Main Girder ◽

Portal Crane

Download Full-text

Design and deflection evaluation of a portal crane subjected to traction load

Materials Testing ◽

10.3139/120.111597 ◽

2020 ◽

Vol 62 (11) ◽

pp. 1131-1137

Author(s):

Yusuf Aytaç Onur ◽

Hakan Gelen

Keyword(s):

Traction Load ◽

Portal Crane

Download Full-text

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽

10.1017/s0094837300025707 ◽

1980 ◽

Vol 6 (02) ◽

pp. 146-160 ◽

Cited By ~ 29

Author(s):

William A. Oliver

Keyword(s):

Critical Points ◽

Scleractinian Corals ◽

Convincing Evidence ◽

Early Triassic ◽

Rugose Corals ◽

History Of ◽

The Subject ◽

Relationship Of ◽

The Relationship ◽

Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Download Full-text