Dynamic response analysis method for DC converter valves in marine transportation

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 1-7.

CHEN Jianyun1，ZHANG Benqiang1，XU Qiang1，ZHOU Wei2，XIE Jian2

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Abstract

In the actual transportation of large power transformer equipment, different degrees of damage often occur under the external action such as wind and wave, so it is necessary to study the dynamic response of the equipment under the most unfavorable environment and discuss the safety of the transportation equipment.Therefore, taking an offshore DC converter valve tower as the research object, the dynamic response of the valve in sea transportation is studied based on its own vibration characteristics. In view of the complex and varied marine transportation environment, many research conditions, and long calculation period of time-frequency analysis, a pseudo-static analysis method is proposed on the basis of power spectrum analysis. The results show that when the ratio of wave frequency to fundamental frequency is less than 0.15, the structural stress response can be obtained directly by pseudo-static method, and the displacement response needs to be amplified by 1.3 times. When the frequency ratio is close to 1, the amplification correction factor of the structural response is linearly correlated with the frequency ratio. The above research provides a basis for the safety assessment and reinforcement of the equipment in marine transportation.

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electrical equipment / maritime transport / dynamic response / analytical method

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CHEN Jianyun1, ZHANG Benqiang1, XU Qiang1, ZHOU Wei2, XIE Jian2. Dynamic response analysis method for DC converter valves in marine transportation[J]. Journal of Vibration and Shock, 2024, 43(14): 1-7

References

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