### Abstract

A two-degree-of-freedom test structure originally developed to exhibit essentially nonlinear (nonlinearizable) stiffness in one of its connections has been modified to display a variable linear term in parallel with the existing nonlinear spring. This structure will be used in generating data for input to new algorithms for nonlinear system identification. In this paper, we report results from experiments in controlling the linear term introduced by applying an initial tension (preload) to the nonlinear spring, including the estimation of the parameters of a nonlinear force-displacement relation. It is shown that a sufficiently large initial tension results in predominantly linear behavior, meaning the same test setup can be used to produce dynamic behavior ranging from nearly linear to essentially nonlinear.

Original language | English (US) |
---|---|

Title of host publication | Dynamics of Civil Structures - Proceedings of the 28th IMAC, A Conference on Structural Dynamics, 2010 |

Publisher | Springer New York LLC |

Pages | 1-6 |

Number of pages | 6 |

ISBN (Print) | 9781441998309 |

DOIs | |

State | Published - 2011 |

### Publication series

Name | Conference Proceedings of the Society for Experimental Mechanics Series |
---|---|

Volume | 4 |

ISSN (Print) | 2191-5644 |

ISSN (Electronic) | 2191-5652 |

### ASJC Scopus subject areas

- Engineering(all)
- Computational Mechanics
- Mechanical Engineering

## Fingerprint Dive into the research topics of 'Characterization of a strongly nonlinear laboratory benchmark system'. Together they form a unique fingerprint.

## Cite this

*Dynamics of Civil Structures - Proceedings of the 28th IMAC, A Conference on Structural Dynamics, 2010*(pp. 1-6). (Conference Proceedings of the Society for Experimental Mechanics Series; Vol. 4). Springer New York LLC. https://doi.org/10.1007/978-1-4419-9831-6_1