tubsdua
Civil/Environmental
- Dec 18, 2011
- 27
Hello All,
I am working on a project to build a numerical model of a power transmission line which is being monitored. The model has been provided with wind load time history. The mean wind component is as per EN and the turbulent part has been generated by a random process using Shinozuka approach.
I have applied the load time history and performed the non-linear direct time history analysis. I first idea was to compare the extreme value of axial force (found by appropriate statistical method for probability distribution) in the insulator to the axial force due to the quasi static loads provided by the EN. On completion of the analysis it was noticed in the time history of axial forces in insulator were mostly in compression. This is quite unexpected.
I am attaching a very simple model with 2 spans of 1 conductor which is supported in the middle via an insulator. In this simple model also the insulator is in compression.
Can someone explain how can this be possible when the wind load is acting in x direction and the conductors displacement suggests that the insulator will be in tension?
I am working on a project to build a numerical model of a power transmission line which is being monitored. The model has been provided with wind load time history. The mean wind component is as per EN and the turbulent part has been generated by a random process using Shinozuka approach.
I have applied the load time history and performed the non-linear direct time history analysis. I first idea was to compare the extreme value of axial force (found by appropriate statistical method for probability distribution) in the insulator to the axial force due to the quasi static loads provided by the EN. On completion of the analysis it was noticed in the time history of axial forces in insulator were mostly in compression. This is quite unexpected.
I am attaching a very simple model with 2 spans of 1 conductor which is supported in the middle via an insulator. In this simple model also the insulator is in compression.
Can someone explain how can this be possible when the wind load is acting in x direction and the conductors displacement suggests that the insulator will be in tension?
