Denis Brizard
Claude Bernard University Lyon 1
Time domainPropagation of uncertaintyMathematical optimizationEngineeringSurrogate modelMathematical analysisMeasurement uncertaintyDamperNonlinear systemBar (music)Frequency domainMaterials scienceRandom dynamical systemPolynomial chaosVibrationDispersion relationSensitivity (control systems)Crash simulationContext (language use)Applied mathematicsUncertainty quantificationMathematicsComputer scienceNonlinear autoregressive exogenous modelWave propagationSolid mechanicsCrash testStress–strain curveMechanicsStructural engineeringKriging
21Publications
4H-index
75Citations
Publications 21
Newest
#1Biswarup Bhattacharyya (UCBL: Claude Bernard University Lyon 1)H-Index: 6
#2Eric Jacquelin (UCBL: Claude Bernard University Lyon 1)H-Index: 16
Last. Denis Brizard (UCBL: Claude Bernard University Lyon 1)H-Index: 4
view all 3 authors...
A proper orthogonal decomposition (POD)-based polynomial chaos expansion (PCE) is utilized in this article for the uncertainty quantification (UQ) of an impact dynamic oscillator. The time-dependent nonsmooth behavior and the uncertainties are decoupled using the POD approach. The uncertain response domain is reduced using the POD approach, and the dominant POD modes are utilized for the UQ of the response quantity. Furthermore, the PCE model is utilized for the propagation of the input uncertai...
1 CitationsSource
#1Denis Brizard (Lyon College)H-Index: 4
#2S. Ronel (Lyon College)
Last. E. Jacquelin (Lyon College)
view all 3 authors...
Equation (12) in the original article [1] gives the strain from the measured voltage on a full bridge configuration of the four strain gages. The full-bridge is intended to measure tension-compression strain (type III full-bridge), the correct equation is therefore [2]
Source
#1Biswarup Bhattacharyya (UCBL: Claude Bernard University Lyon 1)H-Index: 6
#2Eric Jacquelin (UCBL: Claude Bernard University Lyon 1)H-Index: 16
Last. Denis Brizard (UCBL: Claude Bernard University Lyon 1)H-Index: 4
view all 3 authors...
AbstractA novel approach, referred to as sparse Kriging–NARX (KNARX), is proposed for the uncertainty quantification of nonlinear stochastic dynamical systems. It combines the nonlinear autoregress...
4 CitationsSource
#1Denis Brizard (UCBL: Claude Bernard University Lyon 1)H-Index: 4
Post-processing the strain waves in split Hopkinson pressure bars to get the stress-strain in the sample requires the knowledge of the characteristic wave speed c0 in the measuring bars. In the context of metrology, the measurement uncertainty in the value of c0 must be assessed. The aim is to minimize this uncertainty, which depends on the way c0 is determined, as it has an impact on the uncertainty in the final stress and strain in the sample. The frequency domain method we introduce is based ...
Source
#1Eric JacquelinH-Index: 16
#2Denis BrizardH-Index: 4
Last. Michael I. Friswell (Swansea University)H-Index: 84
view all 4 authors...
Characterizing the time-domain response of a random multiple-degree-of-freedom dynamical system is challenging and often requires Monte Carlo simulation (MCS). Differential equations must therefore be solved for each sample, which is time-consuming. This is why polynomial chaos expansion (PCE) has been proposed as an alternative to MCS. However, it turns out that PCE is not adapted to simulate a random dynamical system for long-time integration. Recent studies have shown similar issues for the f...
Source
#1Eric Jacquelin (UCBL: Claude Bernard University Lyon 1)H-Index: 16
#2Niccolò Baldanzini (UniFI: University of Florence)H-Index: 12
Last. Marco Pierini (UniFI: University of Florence)H-Index: 21
view all 5 authors...
Abstract Propagating uncertainties through mechanical systems has been widely studied for the last thirty years. In particular metamodels based on polynomial chaos expansion (PCE) have been successfully developed in the context of both intrusive and non-intrusive methods. However, modelling random dynamical systems is much more challenging and requires increasing computational resources when the time integration becomes longer. Therefore separating the time aspect of the dynamical response and t...
4 CitationsSource
#1Gengjian Qian (UCBL: Claude Bernard University Lyon 1)H-Index: 2
#2Michel Massenzio (UCBL: Claude Bernard University Lyon 1)H-Index: 7
Last. Mohamed Ichchou (ECL: École centrale de Lyon)H-Index: 30
view all 4 authors...
Abstract Restricted by high calculation cost of single engineering model run and large number of model runs for sampling-based Sensitivity Analysis (SA), qualitative SA are used for parameter study of the Vehicle Restraint System (VRS) and quantitative SA of such models has always been a challenge. Sequential approaches are proposed for SA of complex systems and the SA of a VRS is realized: sampling-based SA methods are discussed; SA of a simple three points dynamic bending test model is realize...
1 CitationsSource
#1Eric Jacquelin (UCBL: Claude Bernard University Lyon 1)H-Index: 16
#2Denis Brizard (UCBL: Claude Bernard University Lyon 1)H-Index: 4
Last. Raphaël Dumas (UCBL: Claude Bernard University Lyon 1)H-Index: 29
view all 3 authors...
The study presents a screening method used to identify the influential parameters of a lower limb model including ligaments, at low numerical cost. Concerning multibody kinematics optimisation, the ligament parameters (isometric length) were found the most influential ones in a previous study. The screening method tested if they remain influential with minimised length variations. The most important parameters for tibiofemoral kinematics were the skin markers, segment lengths and joint parameter...
2 CitationsSource
#1Marie-Christine Chevalier (UCBL: Claude Bernard University Lyon 1)H-Index: 2
#2Denis Brizard (UCBL: Claude Bernard University Lyon 1)H-Index: 4
Last. Philippe Beillas (UCBL: Claude Bernard University Lyon 1)H-Index: 17
view all 3 authors...
AbstractObjectives: The aim of this article is to report on the possible relationships between tramway front-end geometry and pedestrian injury risk over a wide range of possible tramway shapes.Methods: To study the effect of tramway front-end shape on pedestrian injury metrics, accidents were simulated using a custom parameterized model of tramway front-end and pedestrian models available with the MADYMO multibody solver. The approach was automated, allowing the systematic exploration of tramwa...
2 CitationsSource
#2Eric JacquelinH-Index: 16
Last. Denis BrizardH-Index: 4
view all 3 authors...
Source