| An iterative approach for modal analysis of solid rocket motor incorporating frequency dependent modulus |
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| 作者姓名： | Muhamm adAdnan SUN Bing ZHANG Jian-wei Sarosh Ali |
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| 作者单位： | School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| 摘 要： | The modulus of viscoelastic materials varies with excitation frequency.However,during modal analysis of frequency dependent materials,a material evaluation frequency is necessary because stiffness cannot be modified during eigenfrequency procedure.As a result,only those vibration modes are accurate,of which eigenfrequency is close to the material evaluation frequency.In order to obtain vibration modes of solid rocket motor(SRM) using material modulus based on frequency which is the same as the eigenfrequency,an iterative approach was proposed.Results of the iterative technique show that frequency modes obtained from the method are in complete agreement with the eigenfrequency and material evaluation frequency.
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| 关 键 词： | solid rocket motor viscoelastic materials modal analysis eigenfrequency frequency dependent modulus |
| 收稿时间： | 2012/1/14 0:00:00 |
An iterative approach for modal analysis of solid rocket motor incorporating frequency dependent modulus |
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| Muhamm adAdnan,SUN Bing,ZHANG Jian-wei,Sarosh Ali.An iterative approach for modal analysis of solid rocket motor incorporating frequency dependent modulus[J].Journal of Aerospace Power,2013,28(2):452-458. |
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| Authors: | Muhammad Adnan SUN Bing ZHANG Jian-wei and Sarosh Ali |
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| Institution: | School of Astronautics,Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | The modulus of viscoelastic materials varies with excitation frequency.However,during modal analysis of frequency dependent materials,a material evaluation frequency is necessary because stiffness cannot be modified during eigenfrequency procedure.As a result,only those vibration modes are accurate,of which eigenfrequency is close to the material evaluation frequency.In order to obtain vibration modes of solid rocket motor (SRM) using material modulus based on frequency which is the same as the eigenfrequency,an iterative approach was proposed.Results of the iterative technique show that frequency modes obtained from the method are in complete agreement with the eigenfrequency and material evaluation frequency. |
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| Keywords: | solid rocket motor viscoelastic materials modal analysis eigenfrequency frequency dependent modulus |
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