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Experimental Study of Aerodynamic Interference Effects for a Suspended Monorail Vehicle-Bridge System Using a

Yunfeng Zou1,2, Zhipeng Liu1, Kang Shi3

  • 1School of Civil Engineering, Central South University, Changsha 410083, China.

Sensors (Basel, Switzerland)
|September 10, 2021
PubMed
Summary

This study investigated wind effects on suspended monorail (SM) systems. A spacing ratio of 3.5 is recommended to ensure safe operation of SM vehicles and bridges in crosswinds.

Keywords:
CFDaerodynamic interference effectscrosswindssuspended monorail vehicle–bridge systemwind tunnel test

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Area of Science:

  • Aerospace Engineering
  • Civil Engineering
  • Fluid Dynamics

Background:

  • Suspended monorail (SM) systems offer eco-friendly, safe, and cost-effective transit.
  • The unique suspended position of SM vehicles makes them vulnerable to wind-induced responses, impacting safety and comfort.

Purpose of the Study:

  • To systematically investigate the aerodynamic characteristics and interference effects of SM vehicle-bridge systems.
  • To analyze these effects under various spacing ratios using experimental and numerical methods.

Main Methods:

  • Wind tunnel tests were conducted to gather aerodynamic data.
  • Computational fluid dynamics (CFD) simulations were used to analyze flow fields and interference mechanisms.
  • A novel wireless wind pressure acquisition system was developed and validated.

Main Results:

  • CFD results showed high agreement with wind tunnel data.
  • Aerodynamic coefficients for upstream vehicles/bridges remained stable across spacing ratios.
  • Interference effects intensified with closer vehicles but decreased as spacing increased.
  • Downstream vehicles/bridges were significantly influenced by upstream vehicles.
  • Vortex shedding frequencies decreased with increased spacing ratios.

Conclusions:

  • The wireless system effectively synchronized multi-point wind pressure acquisition.
  • A spacing ratio of 3.5 is optimal for ensuring SM system stability and safety in crosswinds.
  • Understanding aerodynamic interference is crucial for safe SM system design and operation.