Experimental and numerical investigation on seismic performance enhancement of free-spanning submarine pipelines equipped with casing-pipe type TMD

Key Points

• Seismic performance enhancement was observed in submarine pipelines using casing-pipe type tuned mass dampers.
• Numerical investigations revealed a significant increase in stability and reduced vibration impacts during simulated seismic activity.
• Experimental setups demonstrated that incorporating tuned mass dampers improved overall pipeline resilience under seismic loading conditions.
• The results support the use of innovative designs like tuned mass dampers to enhance safety in underwater pipeline systems.