## System identification of inverse, multimodal and nonlinear problems using evolutionary computing - Application to a pile structure supported on nonlinear springs

- This paper deals with the system identification of a mechanical structure supported by nonlinear springs subjected to an external load. If all mechanical parameters of the system were known, the displacement of the system subjected to this load could be easily calculated. However, the monitoring applications often deal with the inverse problem. The loads and displacements of the system are known and certain mechanical Parameters of the system are sought. The solution of such inverse problems can be difficult, especially when they have a nonlinear and multimodal character, which often makes them appear intractable at first sight. However, evolutionary computing can be applied to solve this inverse, nonlinear and multimodal problem. Sometimes a prior knowledge exists on certain system properties, which is difficult to implement into analytical or numerical solvers. This knowledge can play a decisive role in identifying the System properties and it can be easily included as a boundaryThis paper deals with the system identification of a mechanical structure supported by nonlinear springs subjected to an external load. If all mechanical parameters of the system were known, the displacement of the system subjected to this load could be easily calculated. However, the monitoring applications often deal with the inverse problem. The loads and displacements of the system are known and certain mechanical Parameters of the system are sought. The solution of such inverse problems can be difficult, especially when they have a nonlinear and multimodal character, which often makes them appear intractable at first sight. However, evolutionary computing can be applied to solve this inverse, nonlinear and multimodal problem. Sometimes a prior knowledge exists on certain system properties, which is difficult to implement into analytical or numerical solvers. This knowledge can play a decisive role in identifying the System properties and it can be easily included as a boundary condition when applying evolutionary algorithms. This article discusses how and under what conditions the unknown spring resistances can be identified. The practical application of this procedure is exemplified here with the mechanical system of a pile foundation.…

Autoren/innen: | Krassimire Karabeliov, Pablo Cuéllar, Matthias Baeßler, Werner Rücker |
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Dokumenttyp: | Zeitschriftenartikel |

Veröffentlichungsform: | Verlagsliteratur |

Sprache: | Englisch |

Titel des übergeordneten Werkes (Englisch): | Engineering Structures |

Jahr der Erstveröffentlichung: | 2015 |

Organisationseinheit der BAM: | 7 Bauwerkssicherheit |

7 Bauwerkssicherheit / 7.2 Ingenieurbau | |

Jahrgang/Band: | 101 |

Erste Seite: | 609 |

Letzte Seite: | 620 |

DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik |

Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurbau | |

Freie Schlagwörter: | Evolutionary computing; Inverse problem; Multimodal solution; Pile monitoring; System identification |

Themenfelder/Aktivitätsfelder der BAM: | Energie |

Infrastruktur | |

Infrastruktur / Sicherheit und Lebensdauer von Bauwerken | |

DOI: | https://doi.org/10.1016/j.engstruct.2015.07.034 |

ISSN: | 0141-0296 |

ISSN: | 1873-7323 |

Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |

Datum der Freischaltung: | 09.03.2017 |

Referierte Publikation: | Ja |

Datum der Eintragung als referierte Publikation: | 13.03.2017 |