Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics
This study focuses on the biodynamic responses of a seated human model to whole-body vibrations in a vehicle. Five-degree-of-freedom nonlinear equations of motion for a human model were derived, and human parameters such as spring constants and damping coefficients were extracted using a three-step...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/1649180 |
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| _version_ | 1832552079186460672 |
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| author | Jong-Jin Bae Namcheol Kang |
| author_facet | Jong-Jin Bae Namcheol Kang |
| author_sort | Jong-Jin Bae |
| collection | DOAJ |
| description | This study focuses on the biodynamic responses of a seated human model to whole-body vibrations in a vehicle. Five-degree-of-freedom nonlinear equations of motion for a human model were derived, and human parameters such as spring constants and damping coefficients were extracted using a three-step optimization processes that applied the experimental data to the mathematical human model. The natural frequencies and mode shapes of the linearized model were also calculated. In order to examine the effects of the human parameters, parametric studies involving initial segment angles and stiffness values were performed. Interestingly, mode veering was observed between the fourth and fifth human modes when combining two different spring stiffness values. Finally, through the frequency responses of the human model, nonlinear characteristics such as frequency shift and jump phenomena were clearly observed. |
| format | Article |
| id | doaj-art-52714bd96dc544ba82ea763c457ebfaf |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-52714bd96dc544ba82ea763c457ebfaf2025-02-03T05:59:36ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/16491801649180Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational CharacteristicsJong-Jin Bae0Namcheol Kang1School of Mechanical Engineering, Kyungpook National University, Daegu, Republic of KoreaSchool of Mechanical Engineering, Kyungpook National University, Daegu, Republic of KoreaThis study focuses on the biodynamic responses of a seated human model to whole-body vibrations in a vehicle. Five-degree-of-freedom nonlinear equations of motion for a human model were derived, and human parameters such as spring constants and damping coefficients were extracted using a three-step optimization processes that applied the experimental data to the mathematical human model. The natural frequencies and mode shapes of the linearized model were also calculated. In order to examine the effects of the human parameters, parametric studies involving initial segment angles and stiffness values were performed. Interestingly, mode veering was observed between the fourth and fifth human modes when combining two different spring stiffness values. Finally, through the frequency responses of the human model, nonlinear characteristics such as frequency shift and jump phenomena were clearly observed.http://dx.doi.org/10.1155/2018/1649180 |
| spellingShingle | Jong-Jin Bae Namcheol Kang Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics Shock and Vibration |
| title | Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics |
| title_full | Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics |
| title_fullStr | Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics |
| title_full_unstemmed | Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics |
| title_short | Development of a Five-Degree-of-Freedom Seated Human Model and Parametric Studies for Its Vibrational Characteristics |
| title_sort | development of a five degree of freedom seated human model and parametric studies for its vibrational characteristics |
| url | http://dx.doi.org/10.1155/2018/1649180 |
| work_keys_str_mv | AT jongjinbae developmentofafivedegreeoffreedomseatedhumanmodelandparametricstudiesforitsvibrationalcharacteristics AT namcheolkang developmentofafivedegreeoffreedomseatedhumanmodelandparametricstudiesforitsvibrationalcharacteristics |