5 June 2026
Wind from passing trains affects noise barriers – may lead to both damage and unnecessary costs
When trains pass at high speed, transient aerodynamic pressures are generated that affect structures along the tracks. Research from Luleå University of Technology shows how these forces influence railway noise barriers – and how current calculation methods may not accurately characterize these loads, potentially leading to unnecessarily costly designs.
"The aerodynamic loads generated by trains vary rapidly and can cause vibrations that affect the structure over time," says Dongyun Liu, who recently defended his doctoral thesis in Structural Engineering at Luleå University of Technology.
Capturing what models miss
Noise barriers are often designed using simplified models that do not fully reflect real conditions. By combining simulations with measurements from operating railways, he shows how pressure and vibration vary depending on train type, speed, environmental conditions and barrier configuration.
"To accurately describe the loads and responses, we need to consider both the characteristics of the train and the design of the structure," says Dongyun Liu.
The results show that variability and temporal characteristics of aerodynamic loads are not fully captured by many simplified models, which has implications for how these structures should be designed.
Dongyun Liu, Luleå University of Technology
Affecting both lifespan and maintenance
Repeated loads from passing trains can gradually lead to material fatigue. This means that some components may deteriorate faster than expected, while others are designed to be stronger than necessary.
"Field data is essential to understand how these structures actually behave over time," says Dongyun Liu.
By better describing how loads develop and accumulate, it becomes possible to identify where risks are highest and when interventions are needed.
More accurate decisions in large-scale systems
The work shows how more detailed analyses can improve both the design and long-term assessment of railway noise barriers.
When aerodynamic loads can be described more realistically, it becomes possible to avoid both overdesign and unexpected damage. This allows resources to be used more efficiently while maintaining safety and performance.
"The goal is to describe both loads and structural response in a way that works in practical applications," says Dongyun Liu.
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