Structural mechanics

structural analysis of a yacht in waves.

Yachts experience heavy loads while crossing world oceans. Therefore, the structural integrity is an important part of yacht design & naval architecture. Standardized loads defined by regulatory requirements are usually followed for designing a yacht, e.g. RINA certification rules. In this case a structural integrity assessment was performed on the full yacht’s structure. Based on the outcomes several local reinforcements were implemented to reduce high peak stress levels in the structure.

FEM analysis

structural integrity assessment.

Maximum stresses were determined by finite element analyses for different load cases to observe their impact on the members. The load on the structure is composed of two separate parts. First is the distributed load from the construction and various weights onboard. The second part was determined from the hydrostatic pressure taking the wave condition into account. Two wave conditions were examined, where the boat is hogging or sagging, i.e. the wavelength coincides with the vessel length and there is either a wave crest or trough at the midship position. So, effects of hull girder stresses on hull openings & structural discontinuities were investigated. Moreover, the bottom structure was investigated when four gyro stabilizers generate forces and moments on it during operation.


Demcon multiphysics.

Demcon multiphysics is an engineering agency with high-end expertise in the area of heat transfer, fluid dynamics, structural mechanics, acoustics, electromagnetism and nuclear physics. We support clients from a wide variety of market sectors and help them achieve their goals in research and development with deep physical insights.

We combine fundamental physical knowledge from an analytical approach with Computer Aided Engineering (CAE) simulations tools from ANSYS, MATHWORKS, COMSOL, STAR-CCM+ and FLUKA to setup, execute, analyze and evaluate numerical simulations. The use of Computational Fluid Dynamics (CFD), Finite Element Analysis (FEM / FEA), Lumped Element Modelling (LEM), Computational Electromagnetics (CEM) and Monte Carlo simulations enables us to make a virtual prototype of your design. With these techniques we can simulate the fluid and gas flows, energy exchange, heat and mass transfer, stresses, strains and vibrations in structures and the interaction of electromagnetic fields with other physical aspects like heat generation. Simulation-driven product development increases the development efficiency and reduces the product development time. Our services can therefore fully support you in the designing phase, from idea up to prototype, from prototype to final design.