Dynamic calculation for sonobuoy suspension heave reduction system with experimental correction
Dynamic calculation for sonobuoy suspension heave reduction system with experimental correction
复制标题
DOI：
10.1016/j.oceaneng.2020.107141
复制
发表时间：
2020-04
影响因子：
5
通讯作者：
Guan Guan-Guan;Jiahong Geng;Lei Wang
中科院分区：
文献类型：
--
作者：
Guan Guan-Guan;Jiahong Geng;Lei Wang
声纳浮标通常由浮标、水下集总潜体和水听器组成。为了减小波浪对水听器的垂向影响，有必要设计一种声纳浮标悬垂减沉系统。然而，目前对该系统的动态分析存在着种种不足。本文设计了一种由蹦极绳索和阻尼盘组成的声纳浮标悬挂系统，并建立了考虑附加质量和变阻力系数的数学模型。用MatLab软件进行仿真，得到了数学结果。此外，为了使有限元模拟简单有效，对非线性流体阻力进行了等效变换，并将等效阻尼系数输入到有限元分析软件中进行仿真计算。基于相似准则，设计了声纳浮标悬垂减沉系统实验，验证了声纳浮标悬置系统的有效性，并探讨了激励频率和悬架质量对降升效果的影响。在此基础上，将实验结果与数学和仿真结果进行了比较，并对惯性系数进行了调整，以降低数学和仿真计算的误差率。这为垂荡响应分析提供了一种更精确的数学和仿真计算方法。
Sonobuoy usually consists of buoying, underwater lumped submerged masses and hydrophone. In order to reduce the vertical effect of waves on hydrophones, it is necessary to design a sonobuoy suspension heave reduction system. However, the current dynamic analysis of the system has various shortcomings. In this paper, we designed a sonobuoy suspension system composed of bungee cord and damping disk, and established its mathematical model considering the added mass and non-constant drag coefficient. The mathematical result was obtained by MATLAB. Besides, in order to make the finite element simulation simple and effective, we carried out the equivalent transformation of the nonlinear fluid resistance, and the equivalent damping coefficient was input to ANSYS for the simulation calculation. Based on the similarity criterion, a sonobuoy suspension heave reduction system experiment was designed to verify the effectiveness of the sonobuoy suspension system and explore the influence of excitation frequency and suspension mass on the heave reduction effect. Base on this, the experimental results were compared with the mathematical and simulation results, and the inertia coefficient was adjusted to reduce the error rate of mathematical and simulation calculation. This provides a more accurate mathematical and simulation calculation method for the heave response analysis.