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Steel and Composite Structures Volume 40, Number 6, September25 2021 , pages 893-902 DOI: https://doi.org/10.12989/scs.2021.40.6.893 |
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Numerical forced vibration analysis of compositionally gradient porous cylindrical microshells under moving load and thermal environment |
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Jianwei Shi and Xiaoxu Teng
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| Abstract | ||
| By using differential quadrature method (DQM), forced vibrational behavior of a porous functionally graded (FG) cylindrical scale-dependent shell in thermal environment and under a moving point load having constant velocity has been researched. Within the micro-size shell, porosities exist with even or uneven distributions. Accordingly, the material properties of the micro-size shell rely on porosities and may be defined utilizing refined power-law functions. Strain gradients have been incorporated because of the existence of size effects at micro scale. Established governing equations based on first-order shell theory have been arranged in Laplace form. Next, time responses of the micro-size shell have been calculated accomplishing inverse Laplace transform technique together with differential quadrature method (DQM). It may be understood that forced vibrational behaviors of micro-size shells are dependent on the load speed, strain gradient factor, pore volume, material gradation and temperature variation. | ||
| Key Words | ||
| DQM; dynamic response; forced vibrations; moving load; porous material, strain gradient theory | ||
| Address | ||
| Jianwei Shi and Xiaoxu Teng: School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, Chongqing, China | ||