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Optimal positioning of sensors for the monitoring of water dams (2010)
Lahmer, Tom ; Könke, Carsten ; Bettzieche, Volker
Optimal positioning of sensors for the monitoring of water dams
Optimale Positionierung von Messeinrichtungen an Staumauern zur Bauwerksüberwachung (2010)
Lahmer, Tom ; Könke, Carsten ; Bettzieche, Volker
Optimale Positionierung von Messeinrichtungen an Staumauern zur Bauwerksüberwachung
Crack identification in hydro-mechanical systems with applications to gravity water dams (2010)
Lahmer, Tom
Crack identification in hydro-mechanical systems with applications to gravity water dams
Isogeometric finite element analysis using polynomial splines over hierarchical T-meshes (2010)
Nguyen-Thanh, Nhon ; Nguyen-Xuan, Hung ; Bordas, Stéphane Pierre Alain ; Rabczuk, Timon
Isogeometric finite element analysis has become a powerful alternative to standard finite elements due to their flexibility in handling complex geometries. One major drawback of NURBS based isogeometric finite elements is their less effectiveness of local refinement. In this study, we present an alternative to NURBS based isogeometric finite elements that allow for local refinement. The idea is based on polynomial splines and exploits the flexibility of T-meshes for local refinement. The shape functions satisfy important properties such as non-negativity, local support and partition of unity. We will demonstrate the efficiency of the proposed method by two numerical examples.
The influence of temperature varying material parameters on the dynamic behavior of short span railway bridges (2010)
Zabel, Volkmar ; Brehm, Maik ; Nikulla, Susanne
The influence of temperature varying material parameters on the dynamic behavior of short span railway bridges
Algorithms for vibration-based structural identification and damage detection (2010)
Zabel, Volkmar ; Brehm, Maik
Algorithms for vibration-based structural identification and damage detection
Seismic analysis of structural response using simplified soil-structure interaction models (2010)
Nasser, Mourad ; Schwedler, Michael ; Wuttke, Frank ; Könke, Carsten
Seismic analysis of structural response using simplified soil-structure interaction models
Multiscale simulation methods in damage prediction of brittle and ductile materials (2010)
Könke, Carsten ; Eckardt, Stefan ; Häfner, Stefan ; Luther, Torsten ; Unger, Jörg F.
Multiscale simulation methods in damage prediction of brittle and ductile materials
Coupled cohesive zone representations from 3D quasicontinuum simulation on aluminum grain boundaries (2010)
Luther, Torsten ; Könke, Carsten
Coupled cohesive zone representations from 3D quasicontinuum simulation on aluminum grain boundaries
An automatic mode pairing strategy using an enhanced modal assurance citerion based on modal strain energies (2010)
Brehm, Maik ; Zabel, Volkmar ; Bucher, Christian
In the context of finite element model updating using output-only vibration test data, natural frequencies and mode shapes are used as validation criteria. Consequently, the correct pairing of experimentally obtained and numerically derived natural frequencies and mode shapes is important. In many cases, only limited spatial information is available and noise is present in the measurements. Therefore, the automatic selection of the most likely numerical mode shape corresponding to a particular experimentally identified mode shape can be a difficult task. The most common criterion for indicating corresponding mode shapes is the modal assurance criterion. Unfortunately, this criterion fails in certain cases and is not reliable for automatic approaches. In this paper, the purely mathematical modal assurance criterion will be enhanced by additional physical information from the numerical model in terms of modal strain energies. A numerical example and a benchmark study with experimental data are presented to show the advantages of the proposed energy-based criterion in comparison to the traditional modal assurance criterion.
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