圆柱壳体瞬态辐射噪声评估算法
发布时间：2018-09-08 18:03
【摘要】：通过自身传感器实测振动数据快速评估瞬态辐射噪声,对及时排除故障,保持水下目标隐蔽性具有重要的意义。本文提出一种基于加速度阵列测试数据的圆柱壳体瞬态辐射声场的工程估算方法:借鉴工况传递分析的思路,分析求解瞬态振-声传递率矩阵,将瞬态激励壳体振动的测量数据代入,就可以估算壳体辐射声压级。在振-声传递率求解的过程中引入截断奇异值分解法,改善求逆时的病态矩阵,减少测试中背景干扰带来的估计误差。试验结果证实,该方法可以用来快速评估空气中敲击圆柱壳体所产生的瞬态辐射噪声,大部分频段噪声级估计误差在3 d B以内。本方法可望提供快速估计圆柱形壳体振动水下辐射噪声级借鉴和参考。
[Abstract]:It is of great significance to evaluate the transient radiated noise quickly through the measured vibration data of its own sensor, which is of great significance for the timely troubleshooting and keeping the underwater target concealment. In this paper, an engineering estimation method for transient radiation sound field of cylindrical shell based on acceleration array test data is presented. The radiation sound pressure level of the shell can be estimated by replacing the measurement data of the transient excited shell vibration. The truncated singular value decomposition method is introduced to solve the vibration-acoustic transfer rate, which can improve the ill-conditioned matrix and reduce the estimation error caused by background interference. The experimental results show that the proposed method can be used to quickly evaluate the transient radiation noise caused by beating cylindrical shells in the air, and the estimation error of the noise level in most frequency bands is less than 3 dB. This method can be used for reference and reference in rapid estimation of underwater radiation noise level of cylindrical shell vibration.
【作者单位】： 海军工程大学;船舶振动噪声重点实验室;
【分类号】：TB535
本文编号：2231279
[Abstract]:It is of great significance to evaluate the transient radiated noise quickly through the measured vibration data of its own sensor, which is of great significance for the timely troubleshooting and keeping the underwater target concealment. In this paper, an engineering estimation method for transient radiation sound field of cylindrical shell based on acceleration array test data is presented. The radiation sound pressure level of the shell can be estimated by replacing the measurement data of the transient excited shell vibration. The truncated singular value decomposition method is introduced to solve the vibration-acoustic transfer rate, which can improve the ill-conditioned matrix and reduce the estimation error caused by background interference. The experimental results show that the proposed method can be used to quickly evaluate the transient radiation noise caused by beating cylindrical shells in the air, and the estimation error of the noise level in most frequency bands is less than 3 dB. This method can be used for reference and reference in rapid estimation of underwater radiation noise level of cylindrical shell vibration.
【作者单位】： 海军工程大学;船舶振动噪声重点实验室;
【分类号】：TB535
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