Reengineering of the aircraft structural life prediction process to fully exploit advances in very high performance digital computing is proposed. The proposed process utilizes an ultrahigh fidelity model of individual aircraft by tail number, a Digital Twin, to integrate computation of structural deflections and temperatures in response to flight conditions, with resulting local damage and material state evolution. A conceptual model of how the Digital Twin can be used for predicting the life of aircraft structure and assuring its structural integrity is presented. The technical challenges to developing and deploying a Digital Twin are discussed in detail.

/pdf/reengineering-aircraft-structural-life-prediction-using-a-285ed7pvc8.pdf

Reengineering Aircraft Structural Life Prediction Using a Digital Twin

Full-scale unsteady RANS CFD simulations of ship behaviour and performance in head seas due to slow steaming

Ship motions using single-phase level set with dynamic overset grids

Grid generation for overset grids on complex geometry can be divided into four main steps: geometry processing, surface grid generation, volume grid generation and domain connectivity. For each of these steps, the procedures currently practiced by experienced users are described. Typical problems encountered are also highlighted and discussed. Most of the guidelines are derived from experience on a variety of problems including space launch and return vehicles, subsonic transports with propulsion and high lift devices, supersonic vehicles, rotorcraft vehicles, and turbomachinery.

/pdf/best-practices-in-overset-grid-generation-55s7bxhd2f.pdf

Best Practices in Overset Grid Generation

SUGGAR: A General Capability for Moving Body Overset Grid Assembly

Suggar++: An improved general overset grid assembly capability

The modifications to a flow solver to add an overset capability can be an impediment to developers wishing such a capability. The Donor interpolation Receptor Transaction library (DiRTlib) is a solver neutral library that simplifies the addition of an overset capability to a flow solver by encapsulating the required operations. This paper discusses the design issues of such a general capability and details the use of DiRTlib in a solver.

DiRTlib: A Library to Add an Overset Capability to Your Flow Solver

http://laboratorios.fi.uba.ar/mincyt/docs/1288725151.pdf

Ralph W. Noack

Papers

Ship motions using single-phase level set with dynamic overset grids

SUGGAR: A General Capability for Moving Body Overset Grid Assembly

Suggar++: An improved general overset grid assembly capability

DiRTlib: A Library to Add an Overset Capability to Your Flow Solver

Large-scale DES computations of the forward speed diffraction and pitch and heave problems for a surface combatant