Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure
An experimental study was made for the identification procedure of time-varying modal parameters and the finite element model updating technique of a beam-like thermal structure in both steady and unsteady high temperature environments. An improved time-varying autoregressive method was proposed fir...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2015/143254 |
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| _version_ | 1832568403679772672 |
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| author | Kaipeng Sun Yonghui Zhao Haiyan Hu |
| author_facet | Kaipeng Sun Yonghui Zhao Haiyan Hu |
| author_sort | Kaipeng Sun |
| collection | DOAJ |
| description | An experimental study was made for the identification procedure of time-varying modal parameters and the finite element model updating technique of a beam-like thermal structure in both steady and unsteady high temperature environments. An improved time-varying autoregressive method was proposed first to extract the instantaneous natural frequencies of the structure in the unsteady high temperature environment. Based on the identified modal parameters, then, a finite element model for the structure was updated by using Kriging meta-model and optimization-based finite-element model updating method. The temperature-dependent parameters to be updated were expressed as low-order polynomials of temperature increase, and the finite element model updating problem was solved by updating several coefficients of the polynomials. The experimental results demonstrated the effectiveness of the time-varying modal parameter identification method and showed that the instantaneous natural frequencies of the updated model well tracked the trends of the measured values with high accuracy. |
| format | Article |
| id | doaj-art-05a04b1f1c034dad860ffe486c41b639 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-05a04b1f1c034dad860ffe486c41b6392025-02-03T00:59:06ZengWileyShock and Vibration1070-96221875-92032015-01-01201510.1155/2015/143254143254Experimental Studies on Finite Element Model Updating for a Heated Beam-Like StructureKaipeng Sun0Yonghui Zhao1Haiyan Hu2State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaState Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, ChinaAn experimental study was made for the identification procedure of time-varying modal parameters and the finite element model updating technique of a beam-like thermal structure in both steady and unsteady high temperature environments. An improved time-varying autoregressive method was proposed first to extract the instantaneous natural frequencies of the structure in the unsteady high temperature environment. Based on the identified modal parameters, then, a finite element model for the structure was updated by using Kriging meta-model and optimization-based finite-element model updating method. The temperature-dependent parameters to be updated were expressed as low-order polynomials of temperature increase, and the finite element model updating problem was solved by updating several coefficients of the polynomials. The experimental results demonstrated the effectiveness of the time-varying modal parameter identification method and showed that the instantaneous natural frequencies of the updated model well tracked the trends of the measured values with high accuracy.http://dx.doi.org/10.1155/2015/143254 |
| spellingShingle | Kaipeng Sun Yonghui Zhao Haiyan Hu Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure Shock and Vibration |
| title | Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure |
| title_full | Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure |
| title_fullStr | Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure |
| title_full_unstemmed | Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure |
| title_short | Experimental Studies on Finite Element Model Updating for a Heated Beam-Like Structure |
| title_sort | experimental studies on finite element model updating for a heated beam like structure |
| url | http://dx.doi.org/10.1155/2015/143254 |
| work_keys_str_mv | AT kaipengsun experimentalstudiesonfiniteelementmodelupdatingforaheatedbeamlikestructure AT yonghuizhao experimentalstudiesonfiniteelementmodelupdatingforaheatedbeamlikestructure AT haiyanhu experimentalstudiesonfiniteelementmodelupdatingforaheatedbeamlikestructure |