Technical papers

Design of acoustic insulation in ships based on predictive vibro acoustic models

The marine industry has used empirical models to predict transfer functions between source locations and noise sensitive cabins extensively in the past. These empirical methods work well for standard construction types…

Predicting the acoustics of rattle

Buzz, Squeak and Rattle (BSR) are acoustically perceived quality attributes that consistently rank among the top "things gone wrong" in initial quality surveys for many new products. BSR issues discovered late in the…

Conjugate heat transfer in hypersonic flows

In certain applications, different regions of the computational domain experience flow conditions/physics that are so different that it is very difficult for a single solver to produce sufficiently accurate results…

Windnoise : Coupling wind tunnel test data or cfd simulation to full vehicle vibro acoustic model

Wind noise has become in recent years a significant contributor to perceived sound inside automobiles. Many methods are nowadays available to couple wind tunnel or CFD (Computational Fluid Dynamics) data to a full…

Multiphysics modeling of high density IC encapsulation

A multi-physics modelling approach for simulating the plastic encapsulation of high density IC packages is presented. This modelling approach is used to predict the two-phase flow of a curing resin, the heat transfer in…

Methodology to predict transient engine compartment air temperature following engine shut down

Cooling and heat protection of the engine compartment significantly impact the performance of combat vehicles. An increased heat load occurs during soak-back after engine shut down, where the fans are shut down. Heat is…

Readiness and value of virtual reality for industrial machinery

The Industrial Machinery market (Industrial equipment, machine tool) has never been so complex. Machinery companies are requested to continuously innovate and optimize their products to face to increasing global…

RCS predictions for electrically large complex structures

Radar Cross Section (RCS) prediction of electrically large complex structures is a technical challenge. This paper presents the study carried out to examine the applicability of PAM-CEM Solutions, the simulation package…

Analysis of influence of plastic bumper on radio wave characteristics

From the standpoint of vehicle appearance, vehicle radar units should be located behind plastic bumpers. Plastic bumpers are made of dielectric material, which causes reflection, scattering, refraction, and diffraction…

Estimation of the threat of IEMI to complex electronic systems

The threat of ultra wideband (UWB) sources is interesting for military issues. This paper summarizes information concerning the voltages generated from some commercially available UWB generator systems and their…