Dynamic Analysis of Overhead Transmission Lines under Turbulent Wind Loading

• 作者: Alok Dua Mathias Clobes Thomas H?bbel Vasant Matsagar
• 来源期刊: 土木工程期刊(英文)
• 学科: 医学
• 关键词: Dynamic Analysis FINITE Element Method SAP2000 TRANSMISSION TOWERS TRANSMISSION LINES
• 年，卷（期）: 2015,（4）
• 页码范围: 359-371
• 页数: 13页
• 分类号: R73

摘要

Transmission tower-line systems are designed using static loads specified in various codes. This paper compares the dynamic response of a test transmission line with the response due to static loads given by Eurocode. Finite element design software SAP2000 was used to model the towers and lines. Non-linear dynamic analysis including the large displacement effects was carried out. Macroscopic aspects of wind coherence along element length and integration time step were investigated. An approach is presented to compare the probabilistic dynamic response due to 7 different stochastically simulated wind fields with the response according to EN-50341. The developed model will be used to study the response recorded on a test line due to the actual wind speed time history recorded. It was found that static load from EN overestimated the strength of conductor cables. The response of coupled system considering towers and cables was found to be different from response of only cables with fixed supports.