Static Performance of Large Tonnage Pin-Connection Joints
Pin-connection joints have been widely used in practical engineering,but the full-scale test of large tonnage pin-connection joints is still rare.The study on the interaction between pins and trunnion plates and its impact on the load-bearing capacity is still insufficient.To investigate the effects of factors such as the installation of internal stiffeners,manufacturing errors of pins,and looseness of pin cover plates on the mechanical properties of pin-connection joints,two full-scale 2 000 tons specimens were tested and ten finite element models were analyzed.The results show that the stiffener has a more significant effect on limiting the deformation of the inner trunnion plate.However,the stiffener has a weaker effect on limiting the relative deformation of the outer trunnion plate.The stiffener can effectively reduce the stress level at the middle of the pin,but it will also exacerbate stress concentration at the end of the pin.Increasing the gap between the pin and pinhole will result in stress concentration on the pinhole wall under the compression of pin.Insufficient stiffness of the pin cover plate will increase the stress level of the pin.The machining accuracy of the pinhole should be ensured during manufacturing.During installation,it should be ensured that the pin cover plate has sufficient stiffness and is reliably connected to the pin.The research conclusions of this paper can provide a reference for the design and application of similar large tonnage pin-connection joints.
pin-connection jointstatic performancetest studyfinite element analysis
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