Strength calculation of gantry cranes for pipeline lifting
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This post was last edited by wangzhanzhuce on 2018-12-30 08:33. When lifting and aligning pipes, gantry cranes are often used, as shown below: It is known that components No. 1 and No. 3 are steel pipes of size 108×4 made of material No. 20； Component 2 is a steel pipe of size 48.3×3 made of material type 20; the span between the two components 3 is 1.5 meters. How can we calculate the load that this gate frame can withstand?
1. Calculations from a mechanical perspective are not complicated. 2. For engineering applications, it is necessary to define safety evaluation criteria, such as safety factors. 3. In similar problems like the one mentioned above, assuming that the strength of each connection node is sufficient, attention is usually paid to the stiffness of the beams, that is, the allowable limit for beam deflection. 4. The placement of component No. 2 in the diagram has a significant impact on the results; therefore, the position and dimensions of component No. 2 are important
This post was last edited by lupg on 2019-1-23 07:47
This post was last edited by lupg on 2019-1-23 at 17:07. 1. Through simple simulations, it is possible to get an approximate idea of the deformations and stress levels. 2. Deformation and stress of the attachments: Assuming no displacement at the bottoms of the two columns, the deformation of the columns and beams is relatively significant. The point under load in the middle of the beam is where the stress is highest; at a load of 10,000 N, the stress in the beam is approximately 76 MPa. 3. Attachment deformation 1: Assuming the columns are placed on a smooth surface, they do not bend significantly under load, but they do tilt. The point under load in the middle of the beam is where the stress is greatest; at a load of 10,000 N, the stress in the beam is approximately 110 MPa
This post was last edited by lupg on 2019-1-23 17:14. I tried several times but was unable to upload the image; there’s nothing I can do about it :(