AUV海洋微结构湍流观测减振方法及实验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (22) : 82-88.

论文

乜云利1，栾新1，宋大雷2，高奇2，杨华1

作者信息 +

Soft connection based vibration reduction for an autonomous ocean turbulence measurement platform

NIE Yunli1，LUAN Xin1，SONG Dalei2，GAO Qi2，YANG Hua1

Author information +

文章历史 +

摘要

AUV (autonomous underwater vehicle)作为移动式自主海洋观测平台，具有长航时、大范围、不受海况影响等优点，与湍流观测仪集成可实现湍流混合在空间与时间上的四维观测，为揭示湍流混合在多尺度动力过程演化与变异中的作用提供新手段。针对AUV海洋微结构湍流观测时的振动噪声问题，从AUV海洋微结构湍流观测的原理出发，分析了振动噪声对湍流观测的影响以及AUV振动噪声的来源及特性。为了减小AUV的振动噪声，提高湍流测量精度，提出了一种基于拉伸弹簧的柔性连接减振方法，并开展了振动实验研究。通过对比分析减振前后加速度的时频域特性，结果表明振动在经过柔性连接减振装置后的加速度有效值及能量明显减小，尤其在54Hz以上频段有效值减少率在64%以上，验证了该方法的有效性。

Abstract

As a mobile autonomous ocean observation platform, the AUV (autonomous underwater vehicle) has the advantage of long endurance, large range and being free from sea condition.Its integration with turbulence sensors can realize the four-dimensional observation of turbulence mixing in space and time, which provides a new way to reveal the role of turbulence mixing in the evolution of multi-scale dynamic process.Focusing on the vibration noise on the AUV turbulence measurement platform, the work bases on the principle of turbulence measurement, analyzes the influence of vibration noise on turbulence measurement, as well as identifies the source and characteristics of the vibration noise on the AUV.In order to reduce the vibration noise on the AUV and improve the measurement accuracy of turbulence, a flexible connection vibration damping method based on an extension spring was proposed, and the corresponding vibration test was carried out.By comparing and analyzing the time-frequency domain characteristics of the vibration acceleration before and after adding vibration damping, the results show that the effective value and energy of the vibration acceleration are significantly reduced, especially when the vibration is above 54 Hz, the reduction rate is more than 64%, which verifies the validity of the method.

导出引用

乜云利1，栾新1，宋大雷2，高奇2，杨华1. AUV海洋微结构湍流观测减振方法及实验研究[J]. 振动与冲击, 2020, 39(22): 82-88

NIE Yunli1，LUAN Xin1，SONG Dalei2，GAO Qi2，YANG Hua1. Soft connection based vibration reduction for an autonomous ocean turbulence measurement platform[J]. Journal of Vibration and Shock, 2020, 39(22): 82-88

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