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<p>Understanding lightning strike distribution near high-speed railway (HSR) viaducts is crucial for ensuring the safety of ground-based power supply and signaling systems, which indirectly impacts train operational safety. This study establishes a calculation model for the number of lightning strikes in the vicinity of viaducts, employing fractal theory to propose a method for estimating lightning distribution patterns. A comparative analysis investigates changes in lightning distribution around viaduct construction sites, distinguishing between pre- and post-construction scenarios. Our findings demonstrate that on open, flat terrain, ground lightning strikes are normally distributed. However, the introduction of a viaduct significantly alters this distribution, creating distinct zones: fully shielded, partially shielded, dangerous, and normal areas, each requiring tailored lightning protection strategies. Crucially, viaduct height, lightning current amplitude, and the initial position of lightning leaders are identified as key factors influencing ground strike distribution. This research offers valuable insights for informed lightning protection design for HSR construction and adjacent infrastructure, enhancing safety in both construction and operational phases.</p>

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Study on characteristics of lightning ground flashes distribution near high-speed railway with viaduct

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Ruifang Li,
  • Nengxing Guo,
  • Xiaobin Cao,
  • Xue Yang

摘要

Understanding lightning strike distribution near high-speed railway (HSR) viaducts is crucial for ensuring the safety of ground-based power supply and signaling systems, which indirectly impacts train operational safety. This study establishes a calculation model for the number of lightning strikes in the vicinity of viaducts, employing fractal theory to propose a method for estimating lightning distribution patterns. A comparative analysis investigates changes in lightning distribution around viaduct construction sites, distinguishing between pre- and post-construction scenarios. Our findings demonstrate that on open, flat terrain, ground lightning strikes are normally distributed. However, the introduction of a viaduct significantly alters this distribution, creating distinct zones: fully shielded, partially shielded, dangerous, and normal areas, each requiring tailored lightning protection strategies. Crucially, viaduct height, lightning current amplitude, and the initial position of lightning leaders are identified as key factors influencing ground strike distribution. This research offers valuable insights for informed lightning protection design for HSR construction and adjacent infrastructure, enhancing safety in both construction and operational phases.