Sökning: "Wengang Mao"

Hittade 3 avhandlingar innehållade orden Wengang Mao.

1. 1. Fatigue Assessment and Extreme Response Prediction of Ship Structures

   Författare :Wengang Mao; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fatigue assessment; extreme response; rainflow; narrow-band approximation; Laplace Moving Average model; transformed Gaussian; zero up-crossing response frequency; significant wave height; safety index; upcrossing spectrum; long term cumulative distribution function; ship routing.; transformed Gaussian;

   Sammanfattning : In this thesis, a simplified narrow-band approximation model is proposed to estimate fatigue damage of ship structures, and an efficient method for extreme response predictions is also developed using upcrossing spectrums of ship responses. The proposed fatigue model includes two main parameters, significant stress range hs and zero upcrossing frequency fz. LÄS MER

3. 2. Random Fatigue Analysis of Container Ship Structures

   Författare :Wengang Mao; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; RAOs; rainflow counting; narrow band approximation; zero up-crossing response frequency; significant wave height; ship structure response; S-N curve; spatio-temporal model; safety index.; zero up-crossing response frequency;

   Sammanfattning : .... LÄS MER

4. 3. Optimal weather routing using ensemble weather forecasts

   Författare :Lukas Skoglund; Jakob Kuttenkeuler; Anders Rosén; Wengang Mao; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; route optimization; ensemble weather forecasts;

   Sammanfattning : Ships small and large all battle the elements when crossing the worlds oceans.  As such, ships are designed to operate in situations with high speed winds and heavy waves.  There are however limits to what any ship can handle safely and it is thus important to avoid the worst weather systems as much as possible. LÄS MER