Keywords
Anti-collision mechanism
Impact response
Crashworthiness
Published : 2026-08-13
Abstract
A bridge-crane trolley may strike the end anti-collision device after overtravel, braking failure, or control delay; therefore, the collision resistance of the device directly affects operational safety. In this study, a shell-based finite-element model of a bridge-crane anti-collision mechanism was developed in HyperMesh, and explicit impact simulations were conducted in LS-DYNA at trolley speeds of 25 and 35 m/min. Each simulation covered 80 ms, and sliding energy, hourglass energy, added mass, stress, and displacement were examined. The sliding- and hourglass-energy ratios remained below 5%, and the added mass stayed below 1% in both cases. At 25 m/min, the maximum von Mises stress was 342.294 MPa, slightly below the 345 MPa yield strength of Q345 steel. At 35 m/min, the maximum stress increased to 429.190 MPa and exceeded the yield strength. These findings provide a basis for strength verification, end-zone speed limitation, and structural improvement of bridge-crane anti-collision mechanisms.
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