Thomas Abrahamsson

2022

Probability of instant rail break induced by wheel–rail impact loading using field test data

Data-driven modal surrogate model for frequency response uncertainty propagation

Model reduction concepts and substructuring approaches for linear systems

Model reduction concepts and substructuring approaches for nonlinear systems

Comparison of Stimuli for Nonlinear System Response Classification

Introduction and Motivation

Preliminaries: Primal and dual assembly of dynamic models

Industrial applications & related concepts

Identification of physically realistic state-space models for accurate component synthesis

Experimental substructuring

2020

Model updating of multiple nominally identical car components

State-space system identification with physically motivated residual states and throughput rank constraint

Weakly nonlinear systems: Modeling and experimental methods

Component mode synthesis interface reduction and modal truncation augmentation using coarse meshes

Multifidelity component interface reduction and modal truncation augmentation

Residual States for Modal Models Identified from Accelerance Data

Automated modal parameter estimation using correlation analysis and bootstrap sampling

Using approximate Bayesian computation by Subset Simulation for efficient posterior assessment of dynamic state-space model classes

Feature-Based Response Classification in Nonlinear Structural Design Simulations

Physically motivated rank constraint on direct throughput of state-space models

Experimental-analytical state-space synthesis of passenger car components

Efficient Component Reductions in a Large-Scale Flexible Multibody Model

Parameter Estimation and Uncertainty Quantification of a Subframe with Mass Loaded Bushings

Experimental validation of a nonlinear model calibration method based on multiharmonic frequency responses

Sequential gauss-newton MCMC algorithm for high-dimensional bayesian model updating

2017

A reduced interface component mode synthesis method using coarse meshes

Sparse polynomial chaos expansions of frequency response functions using stochastic frequency transformation

Variability of Nominally Identical Components and their Influence in an Assembly - Application to a Volvo XC90

Approximate Bayesian Computation by Subset Simulation using hierarchical state-space models

2017

Approximate Bayesian Computation by Subset Simulation for model selection in dynamical systems

Stochastic finite element model calibration based on frequency responses and bootstrap sampling

A pretest planning method for model calibration for nonlinear systems

Hybrid Time/Frequency Domain Identification of Real Base-Isolated Structure

Stochastic Finite Element Model Updating by Bootstrapping

Redundant Information Rejection in Sensor Localisation Using System Gramians

Validation of a model calibration method through vibrational testing of a mechanical system with local clearance

An efficient exponential predictor-corrector time integration method for structures with local nonlinearity

Approximate Bayesian Computation by Subset Simulation for Parameter Inference of Dynamical Models

An Efficient Simulation Method for Large-Scale Systems with Local Nonlinearities

Feature-based design analysis for automatic classification of simulated nonlinear responses using machine learning

Informative Data for Model Calibration of Locally Nonlinear Structures Based on Multiharmonic Frequency Responses

Stability Limitations in Simulation of Dynamical Systems with Multiple Time-Scales

What Is Normal About Normal Modes?

Bayesian Treatment of Spatially-Varying Parameter Estimation Problems via Canonical BUS

Calibration, Validation and Uncertainty Quantification of Nominally Identical Car Subframes

Feature-based design analysis for automatic classification of simulated non-linear responses using Machine Learning

Experiment design for improved frequency domain subspace system identification of continuous-time systems

A method for improving test rig performance using passive components

Towards an Automatic Modal Parameter Estimation Framework: Mode Clustering

A comparison of the dynamic behavior of three sets of the ampair 600 wind turbine

A parallel solution method for structural dynamics response analysis

Finite element model calibration using frequency responses with damping equalization

Calibration and Validation of a Car Subframe Finite Element Model Using Frequency Responses

Calibration and cross-validation of a car component model using repeated testing

A Parallel Solution Method for Structural Dynamic Response Analysis

Model calibration and uncertainty of A600 wind turbine blades

Modeling and Calibration of Small-scale Wind Turbine Blade

An efficient simulation method for structures with local nonlinearity

An Efficient Exponential Integrator for Large Nonlinear Stiff Systems Part 1: Theoretical Investigation

Experimental-Analytical Dynamic Substructuring of Ampair Testbed: A State-Space Approach

On Gramian-Based Techniques for Minimal Realization of Large-Scale Mechanical Systems

Automated Modal Analysis Based on Statistical Evaluation of Frequency Responses

An Efficient Exponential Integrator for Large Nonlinear Stiff Systems Part 2: Symplecticity and Global Error Analysis

FEM calibration with FRF damping equalization

Modal Reduction Based on Accurate Input-Output Relation Preservation

Efficient simulation method for nonlinear structures: methodology and stability consideration

Integration of Hamiltonian systems with a structure preserving algorithm

Spread in Modal Data Obtained From Wind Turbine Blade Testing

The Modal Observability Correlation as a Modal Correlation Metric

A Metric for Modal Truncation in Model Reduction Problems Part 1: Performance and Error Analysis

Model calibration of a locally non-linear structure utilizing multi harmonic response data

Frequency response calculations of a nonlinear structure a comparison of numerical methods

Modal Dominancy Analysis Based on Modal Contribution to Frequency Response Function ℋ2-Norm

Manifold Metropolis adjusted Langevin algorithm for high-dimensional Bayesian FE

Calibration and cross-validation of a car component using frequency response functions and a damping equalization technique

Development of simplified models for wind turbine blades with application to NREL 5MW offshore research wind turbine

Dynamic sub-structuring with passive state-space components

A Metric for Modal Truncation in Model Reduction Problems Part 2: Extension to Systems with High-Dimensional Input Space

Locally Non-linear Model Calibration Using Multi Harmonic Responses: Applied on Ecole de Lyon Non-linear Benchmark Structure

A new parameter perturbation method suitable for reliability analysis of large dynamic systems

Improving test rig performance using passive components

An experimental approach to improve controllability in test rigs using passive components

Application of an automated modal analysis based on frequency response function estimates

An improved modal approach for model reduction based on input-output relation

Finding local non-linearities using error localization from model updating theory

On Grammian-based reduction methods for moderate size systems

Experimental-analytical substructure model sensitivity analysis for cutting machine chatter prediction

Model calibration of locally nonlinear structures using information from sub and super harmonic responses

Automated modal analysis based on frequency response function estimates

Selecting Appropriate Analytical Mode Basis for SEREP-expansion of Experimental Modes

Improving the TWR algorithm using passive control components

Dynamic substructuring in metal cutting machine chatter

Development, accomplishment and evaluation of a project course in applied mechanics---Lessons learnt

Ökad Styrbarhet i Komponentprovning genom Strukturmodifikationer

Indirect Vibration Sensing and Optimal Sensor Placement

Increased Controllability in Component Testing using Structural Modifications

Transmisson Path Characterization for Passive Vibration Control

Component system identification and state-space model synthesis

Jämförande studie av felmått för modelluppdatering

Substructure System Identification from Coupled System Test Data

State-space model identification for component synthesis

Comparison of Several Error Metrics for FE Model Updating

Constrained state–space system identification with application to structural dynamics

Constrained state–space system identification with application to structural dynamics

Optimising the informativeness of test data used for computational model updating

Passive Railway Car Secondary Suspension - Force, Power, Deflections, Roll and Comfort

Briefly on passive railway car suspension - force, power, deflection, roll and comfort

Subsystem State-Space Model Identification and Its Sensitivity to Test Variability

Modal analysis and synthesis in transient vibration and structural optimization problems