Abstract: The cable cleats play a role in fixing and supporting the cables. The cable cleats will withstand very large electromotive force when the grids are short-circuited. The deterioration of their mechanical properties may cause a serious threat to the stable operation of the grids. In this paper, the sequential coupling method of load transfer was used to establish the electromagnetic-structure finite element model of the cable cleats system. Based on Maxwell's electromagnetic theory and virtual displacement method, the transient electromagnetic field analysis of the cable was performed to obtain its magnetic field distribution and short-circuit electromotive force. As an excitation source, the transient dynamic analysis of the cable cleats was carried out to study its mechanical properties. The results show that the transient electromotive force of the cable changes periodically with the power frequency period, and the peak value of the electromotive force gradually reduced in every cycle. The stress of the intermediate phase cable fixture is the largest, and plastic deformation occurs at its corner of the fixture base mounting plate; Compared with the cable support, the stress of the cable fixture is less affected by the static and dynamic analysis methods. It recommended that the static analysis can be used for qualitative analyzing of the cable fixture stress while the transient dynamics method can be used for accurately quantitatively analyzing. As the calculated stress of the cable support is greatly affected by the analysis methods, so when the cable fixture is arranged in a horizontal linear shape, the transient dynamic analysis method should be used.

Key words: cable cleats, electromagnetic force, electromagnetic structural coupling, transient, dynamic