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The objective of this paper is to give a survey on the use of non-probabilistic methods for non-deterministic numerical analysis. It consists of a general theoretical discussion on the use of non-deterministic concepts in numerical analysis, an overview of the basic properties of possible implementations of the non-probabilistic finite element code, and(More)
This paper concerns with the design of an acoustic cavity (transmission suite) for the vibro-acoustic characterization of lightweight panels. This setup has the big advantage of being a small (1150x984x820 mm) which allows the identification of the studied behaviour for both structure-and airborne excitation, on panels of different size (from A4 to A2) and(More)
In a virtual prototyping context the importance of physical uncertainty modelling has become more evident. The increased computational performance over the last years enlarges the potential in the use of large models (more DOF's) and in the application of more advanced numerical methods. This results in more accurate models from the numerical point of view.(More)
Lightweight components are widely used in several technology sectors such as in transport and machine design and an appropriate knowledge about their vibro-acoustic performance characteristics is desired already in early design stages. Although they are able to offer a highly attractive weight saving, lightweight structures often exhibit unsatisfactory(More)
In the automotive industry, vehicle interior acoustics has become an important design criterion. Both legal restrictions and the growing demand for comfort, force the car manufacturers to optimize the vibro-acoustic behaviour of their products. The tendency to minimise the number of physical prototypes and to reduce the overall development cost and time, as(More)
This paper aims to assess the effect of input uncertainty on FRF predictions obtained with Finite Element analysis. The Transformation Method (TM), presented by M. Hanss, uses a fuzzy approach based on interval arithmetic: the uncertain response is reconstructed from a set of deterministic responses, combining the extrema of each interval in every possible(More)
A new prediction technique, based on the indirect Trefftz method, has been developed for the steady– state dynamic analysis of coupled vibro–acoustic systems. In contrast with the finite element method, in which the dynamic field variables within each element are expanded in terms of local, non–exact shape functions, the dynamic field variables are(More)
3D IC assembly processes are introducing new stress mechanisms not observed in 20 environments, which have significant effects on the performance of both BEOL and FEOL. This paper deals with the underfill-microbump interaction mechanism observed after 3D IC stacking and focuses on its scarcely explored impact on the FEOL. FEOL stress sensors and finite(More)
In this study, the fatigue performance of solder joints in four point bending test was evaluated by a novel finite-element modeling method. A simplified modeling technique was implemented in order to focus on the behavior of the critical solder joint. The fatigue life was estimated by taking into account the creep behavior of solder joints. Morrow's fatigue(More)