Fig 1.
Schematic illustration of the bolt structure of the T-type clamp and the application of preload.
Fig 2.
Force analysis of the contact surface between the bolt and the conductor.
Fig 3.
The relationship between bolt preload and contact pressure.
Fig 4.
Alternating electric field–induced electrostriction at the conductor–bolt contact surface.
Fig 5.
Magnetostrictive effect at the conductor–bolt contact interface induced by the alternating magnetic field.
Fig 6.
Thermal pressure at the conductor–bolt contact interface induced by the temperature field.
Fig 7.
On-site layout of the experiment for the T-type clamp.
(a) Setup for the temperature-rise experiment. (b) Setup for the displacement experiment.
Fig 8.
Application of torque to the T-type clamp using a torque wrench.
Table 1.
Average Temperature at the Conductor-Fitting Contact Interface (°C).
Fig 9.
Application of torque to the T-type clamp using a torque wrench.
Table 2.
Displacement Values on Clamp Surfaces(m).
Fig 10.
Variation Curve of the Average Displacement of the T-Type Clamp under Different Applied Torques.
Table 3.
Parameter Settings for the T-type Clamp and Conductor.
Fig 11.
Schematic illustration of mesh generation and local mesh refinement.
Fig 12.
Displacement distribution of the T-type clamp calculated using the conventional algorithm (unit: m).
Fig 13.
Displacement distribution of the T-type clamp calculated using the algorithm presented in this paper (unit: m).
Fig 14.
Bolt preload obtained by various methods.