Publications

Publications

Finite Element Simulation of a Blast Containment Cylinder Using LS-DYNA

This work simulates the hydrodynamic impact of an internal TNT blast within a containment cylinder using ALE-based LS-DYNA modeling. The study investigates how mesh geometry and explosive-air interactions influence pressure wave formation and structural loading. Results provide insights into shape-driven blast response and strategies for optimizing internal cylinder design.

Tripping Instability of Ring Stiffened Cylinders induced by Underwater Explosions

Y.O. Shin, Y.S. Shin

This paper explores how underwater explosion-induced hydrodynamic forces affect the stability of ring-stiffened cylindrical shells. By simulating the interaction of blast waves and fluid flow using ALE-based LS-DYNA models, the study uncovers the role of geometric parameters in triggering tripping instability. The results support shape and structural optimization to mitigate failure under dynamic fluid loads.

On the Robustness of a Simple Domain Reduction Scheme for Simulation-Based Optimization

Nielen Stander, K.J. Craig

This paper presents the SRSM approach, a simulation-driven optimization framework using parametric modeling and adaptive response surfaces. It enables efficient shape optimization even in the presence of noise and nonlinearity by reducing the design domain based on predictive criteria. Engineering examples, including crash and impact simulations, show its effectiveness in converging to robust, high-performance designs.

Analyzing 'Noisy' Structural Problems with LS-OPT: Probabilistic and Deterministic Fundamentals

Willem Roux, Nielen Stander

This study presents a framework for handling noisy structural simulations through probabilistic and deterministic analysis using LS-OPT. Parametric modeling and shape optimization are used to distinguish controllable design influences from inherent variability, enabling more robust structural performance evaluations. Case studies illustrate how these tools improve prediction accuracy and guide design decisions under uncertainty.

Shape Adaptive Airfoils for Turbomachinery Applications: Simulation and Optimization

May 2, 2025//Tobias Muller, Martin Lawerenz

This paper investigates shape-adaptive airfoils for turbomachinery using parametric modeling and shape optimization. It applies LS-OPT and TrueGrid® to explore structural deformation mechanisms and optimize airfoil shape for aerodynamic performance. The results validate the use of parametric geometric control in designing smart, deformable components.