Optimal Determination of Structural Dynamical Parameters Using Ambient Vibration

Sertaç Tuhta

doi:https://doi.org/10.17780/ksujes.344989

Makale detayları

Optimal Determination of Structural Dynamical Parameters Using Ambient Vibration

Yazarlar:

Sertaç Tuhta

Ana Başlıklar:

İnşaat mühendisliği

Dergi:

Kahramanmaras Sutcu Imam University Journal of Engineering Sciences 2018 Vol.21 Issue 1, pp.55-65

Belge Tipi:

Makale

Yayın Tarihi:

3/2018

Belge Dili:

İngilizce

Document ID (Org No.):

2000499276

DOI:

https://doi.org/10.17780/ksujes.344989

Özet:

 


By using ambient vibration, a new approach based on
improvement and correction of system characteristic matrix in modal vibration
is provided. The result is that actual system characteristic matrices are
accurately made such that the error is minimized at great extent. This clearly
shows how the system parameters can be updated in a more reliable way. Firstly,
by approximation, the actual system characteristic matrices are determined
using the singular value decomposition of block Hankel matrix that is built
from response correlation matrix. Secondly, by black-box modeling
approximation, the input-output relation of the system through Kalman theory is
made in order to make the system characteristic matrices optimal definite.
Furthermore, by expressing Hankel matrix’s multiplicities from Eigen solution
of the system state matrix obtained in previous iteration, it is possible to
determine both the covariance of non-measurable process noise and measurement
noise matrixes which are present in the Riccati equation. This means that both
measurement and process covariance noises’ matrixes are indirectly built only
from measured out-put data. The repetition of iterations is done until the
error is sufficiently minimized. And then system modal parameters are extracted
from these obtained system characteristic matrices. This system is used for
modal update of the system in which modal parameters are applied directly and
iterative methods. The code supporting this algorithm can be interfaced with
the codes of the finite elements.


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Makale detayları

Optimal Determination of Structural Dynamical Parameters Using Ambient Vibration

Yazarlar: Sertaç Tuhta

Ana Başlıklar: İnşaat mühendisliği

Dergi: Kahramanmaras Sutcu Imam University Journal of Engineering Sciences 2018 Vol.21 Issue 1, pp.55-65

Belge Tipi: Makale

Yayın Tarihi: 3/2018

Belge Dili: İngilizce

Document ID (Org No.): 2000499276

DOI: https://doi.org/10.17780/ksujes.344989

Sayı

Yazarlar:

Sertaç Tuhta

Ana Başlıklar:

İnşaat mühendisliği

Dergi:

Kahramanmaras Sutcu Imam University Journal of Engineering Sciences 2018 Vol.21 Issue 1, pp.55-65

Belge Tipi:

Makale

Yayın Tarihi:

3/2018

Belge Dili:

İngilizce

Document ID (Org No.):

2000499276

DOI:

https://doi.org/10.17780/ksujes.344989