Evaluation of natural frequency and critical speed of the rotating structure using ANSYS
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초록
This study aims to support stable and efficient system operation by analyzing the dynamic characteristics of the Rotation Packed Bed (RPB) system. The RPB system provides high mass transfer performance due to high-speed rotation, but it is affected by natural frequencies and critical speeds and has an important effect on the stability of the system. In this study, through ANSYS modal analysis, to evaluate vibration characteristics according to the rotational speed of RPB system, natural frequency and mode deformation of RPB system modelling are analyzed, and the frequency change according to the rotational speed is shown using the Campbell diagram. As a result, the critical speeds at 13,184 rpm and 16,658 rpm are confirmed at the given condition based on RPB modelling, and it is recommended to maintain operating (rotation) speed of 9,228 rpm (with considering a separation margin of about 20%) or less for stable. This study can provide design guidelines for strengthening dynamic stability in high-speed rotating systems like RPB system.
Abstract
This study aims to support stable and efficient system operation by analyzing the dynamic characteristics of the Rotation Packed Bed (RPB) system. The RPB system provides high mass transfer performance due to high-speed rotation, but it is affected by natural frequencies and critical speeds and has an important effect on the stability of the system. In this study, through ANSYS modal analysis, to evaluate vibration characteristics according to the rotational speed of RPB system, natural frequency and mode deformation of RPB system modelling are analyzed, and the frequency change according to the rotational speed is shown using the Campbell diagram. As a result, the critical speeds at 13,184 rpm and 16,658 rpm are confirmed at the given condition based on RPB modelling, and it is recommended to maintain operating (rotation) speed of 9,228 rpm (with considering a separation margin of about 20%) or less for stable. This study can provide design guidelines for strengthening dynamic stability in high-speed rotating systems like RPB system.
참고문헌 (24)
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