SNAME TEXAS SECTION LUNCHEON

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We are back to in-person meeting!

Hybrid event with both in-person and webinar options.

For in-person meeting safety instructions, see Norris Center Covid Opening Guidelines.

 

Tuesday, Aug 24, 2021

Lunch: 11:30 – 12:30 CT

Presentation: 12:30 – 13:30 CT

Norris Centers – Houston

816 Town and Country Blvd #210,

Houston, TX 77024

Topic

Fatigue Damage Estimation and Prediction Using Vessel-Specific Wave Conditions

Historical evidence has shown that fatigue damage is one of the dominant failure mechanisms of ocean-going vessels. Accurate fatigue assessment is critical for decision making regarding structural inspection and maintenance planning, future operations and potential life extension.

This presentation proposes a methodology for vessel-specific wave induced fatigue damage estimation and prediction based on Spectral-Based Fatigue Analysis (SFA) and Monte Carlo simulation (MCS). The impact of the vessel-specific wave conditions on the vessel’s fatigue damage is characterized by a relative value to the fatigue damage estimation using unrestricted service wave conditions. The relative fatigue damage can be used as an indicator to characterize the ship’s actual consumed fatigue life. For the remaining fatigue life prediction, MCS is conducted with consideration of both historical vessel-experienced waves and the wave conditions for unrestricted services. This predicts the mean and 95% confidence interval of future fatigue damage.

A container ship trading on the Asia-North Europe and Asia-North America routes is selected as a case study. Results show that, compared with the North Atlantic unrestricted service wave conditions, the actual fatigue damage using experienced wave conditions is significantly reduced for the selected typical structural connections. The continuous and vessel-specific fatigue damage accumulation awareness and prediction will benefit owners, operators, and Class Societies to provide inputs for operations and guide future inspection and survey planning with enhanced vessel safety, readiness and reduced operational cost.

Meet Our Speakers

Zhenghua Wang

Zhenghua Wang is currently a senior engineer in the Department of Global Engineering and Technology at American Bureau of Shipping (ABS). He received his B.S. (2007) and M.S. (2010) degrees in civil engineering from Tongji University, Shanghai, China. He received his Ph.D. degree (2014) in civil engineering from Rice University, Houston, TX, USA. His work mainly focuses on structural digital twin, predictive compliance model, sensor-based structural health monitoring, structural reliability, new technology qualification, risk assessment of marine and offshore structures.