Numerical and experimental modal analysis of aluminium and composite plates
Апстракт
The paper presents the comparative analysis of the dynamic behaviour of two rectangular plates of different material, aluminium and composite. While their global geometric dimensions (length, width and thickness) are identical, their inner structures are quite different. Whereas aluminium plate can be considered isotropic, composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a
comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscilla...te. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the
differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable to a wide range of engineering problems involving vibrations.
Кључне речи:
Aluminum plate / Composite plate / DIC / FEM / FFTИзвор:
The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH, 2019, 45-Издавач:
- Belgrade : Innovation Center of Faculty of Mechanical Engineering
Финансирање / пројекти:
- Истраживање и развој савремених приступа пројектовања композитних лопатица ротора високих перформанси (RS-MESTD-Technological Development (TD or TR)-35035)
Колекције
Институција/група
Mašinski fakultetTY - CONF AU - Baltić, Marija AU - Svorcan, Jelena AU - Peković, Ognjen AU - Ivanov, Toni PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4307 AB - The paper presents the comparative analysis of the dynamic behaviour of two rectangular plates of different material, aluminium and composite. While their global geometric dimensions (length, width and thickness) are identical, their inner structures are quite different. Whereas aluminium plate can be considered isotropic, composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscillate. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable to a wide range of engineering problems involving vibrations. PB - Belgrade : Innovation Center of Faculty of Mechanical Engineering C3 - The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH T1 - Numerical and experimental modal analysis of aluminium and composite plates SP - 45 UR - https://hdl.handle.net/21.15107/rcub_machinery_4307 ER -
@conference{ author = "Baltić, Marija and Svorcan, Jelena and Peković, Ognjen and Ivanov, Toni", year = "2019", abstract = "The paper presents the comparative analysis of the dynamic behaviour of two rectangular plates of different material, aluminium and composite. While their global geometric dimensions (length, width and thickness) are identical, their inner structures are quite different. Whereas aluminium plate can be considered isotropic, composite plate is a unidirectional carbon-epoxy laminate. Modal characteristics of the two plates were determined both numerically and experimentally and a comparative analysis of the obtained results was performed. Responses of the plates were documented by an optical, contactless 3D digital image correlation (DIC) system that contains a set of high-speed cameras capable of recording the movement of the white-and-black stochastic pattern applied to the upper surfaces of the plates. Numerical simulations were performed by the finite element method (FEM) in the commercial software package ANSYS. The plates were excited by a modal hammer and allowed to freely oscillate. In order to determine the natural frequencies of the plates the recorded time-domain responses were post-processed, i.e. converted to frequency domain by fast Fourier transform (FFT). The first three natural modes were successfully experimentally established and compared to the corresponding numerical values. Since the differences between the two sets of results are less than 5%, the applied experimental technique can be considered valid and suitable to a wide range of engineering problems involving vibrations.", publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering", journal = "The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH", title = "Numerical and experimental modal analysis of aluminium and composite plates", pages = "45", url = "https://hdl.handle.net/21.15107/rcub_machinery_4307" }
Baltić, M., Svorcan, J., Peković, O.,& Ivanov, T.. (2019). Numerical and experimental modal analysis of aluminium and composite plates. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH Belgrade : Innovation Center of Faculty of Mechanical Engineering., 45. https://hdl.handle.net/21.15107/rcub_machinery_4307
Baltić M, Svorcan J, Peković O, Ivanov T. Numerical and experimental modal analysis of aluminium and composite plates. in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH. 2019;:45. https://hdl.handle.net/21.15107/rcub_machinery_4307 .
Baltić, Marija, Svorcan, Jelena, Peković, Ognjen, Ivanov, Toni, "Numerical and experimental modal analysis of aluminium and composite plates" in The Book of Abstracts - International Conference of Experimental and Numerical Investigations and New Technologies CNN TECH (2019):45, https://hdl.handle.net/21.15107/rcub_machinery_4307 .