This paper reports the parallel implementation of adaptive mesh reenement within nite diierence ocean circulation models. The implementation is based on the model of Malleable Tasks with ineeciency factor which allows a simple expression of the diierent levels of paral-lelism with a good eeciency. Our goal within this work was to validate this approach on an actual application. For that, we hav...

Finding paths in networks is a well exercised activity both in theory and practice but still remains a challenge when the search domain is a dynamic communication network environment with changing traffic patterns and network topology. To enforce dependability in such network environments new routing techniques are called upon. In this paper we describe a distributed algorithm capable of findin...

This paper describes the automatic generation of a structureddominant mesh based on an automatic block decomposition obtained using the medial object. The mesh generator will produce a mesh for an arbitrary two-dimensional geometry, where quadrilateral-dominant or triangular meshing is used when structured meshing fails. The domain is automatically partitioned into blocks (sub-regions), and an ...

Recent research on friction in robot joints and transmission systems has considered meshing friction a position-dependent friction component. However, in this paper we show experimental evidence that meshing friction depends highly on joint speed. We identify the meshing friction in the gearboxes of a robotic leg, and we propose a new mathematical model that considers the rate dependency of mes...

Mesh phasing has a dramatic impact on the static and dynamic behaviours of planetary gear systems. This research investigates coupled phase-tuning mechanism two-stage systems corresponding relationship with vibration system. Due to inherent meshing symmetry system, phase-coupled tuning system is derived based force relationships coupling characteristics between different stages. The excitation ...

To study the dynamic characteristics of spur gears with crack faults, it is essential to establish meshing stiffness model accurately. In this paper, time-varying (TVMS) and load-sharing ratio (LSR) were established by potential energy method, correctness TVMS was verified KISSsoft. The influence gear depth angle on LSR analyzed introducing into model. multi-degree freedom dynamics centralized ...

Hydromechanical continuously variable transmission (HMCVT) is capable of bearing large torque and has wide range, which suitable for high-power tractors. Dynamic characteristics could influence the tractor life, especially in a tractor. Wet clutch crucial component HMCVT, smooth soft power transmission. Therefore, it important to study dynamic implement wet test HMCVT. In this paper, AMESim use...

A complete method is proposed to compute a certified, or ambient isotopic, meshing for an implicit algebraic surface with singularities. By certified, we mean a meshing with correct topology and any given geometric precision. We propose a symbolic-numeric method to compute a certified meshing for the surface inside a box containing singularities and use a modified Plantinga-Vegter marching cube...

Dynamic characteristics of a typical multistory building in Iran have been studied in two different stages of building construction, using ambient vibration tests. Finite element models have also been used to determine these characteristics and to verify test results. The results indicated the agreements and also differences between conventional theoretical models and the behaviour of real stru...

Microscopic roughness is inevitable on the gear meshing surface, which also a key parameter affecting dynamic response. The surface exhibits self-affine characteristics across multiscales. To explore influence of fractal topography vibration amplitude system under different rotational speeds and loads, an experimental setup spur transmission devised. dimension are calculated by power spectral d...