【作者】 张中阳； 王帅； 盛美萍；

【Author】 ZHANG Zhong-yang;WANG Shuai;SHENG Mei-ping;College of Marine Science and Technology,Northwestern Polytechnical University;Research & Development Institute,Northwestern Polytechnical University in Ningbo;

【机构】 西北工业大学航海学院； 西北工业大学宁波研究院；

【摘要】 激励源输入功率是利用统计能量分析方法(SEA)进行噪声预报的重要输入条件。但工程环境复杂,很难直接测得设备激励,需利用结构的动态响应来反演激励。而获取的动态响应存在误差,可导致激励源反演不准确。基于SEA能量响应与激励源的关系,本文在激励源输入功率反演中提出误差影响因子,对反演精度进行控制。仿真表明较小误差影响因子可提高反演精度,本文算例中,误差影响因子低于10可得到高精度反演结果。本文研究对提高噪声预报精度具有参考价值。更多还原

【Abstract】 The input power of the excitation source is an important input condition for noise prediction using the statistical energy analysis method(SEA).However,the engineering environment is complex and it is difficult to directly measure the equipment excitation,and the dynamic response of the structure needs to be used to invert the excitation.Errors in the acquired dynamic response can lead to inaccurate excitation source inversion.Based on the relationship between the SEA energy response and the excitation source,this paper proposes an error influence factor in the input power inversion of the excitation source to control the inversion accuracy.The simulation shows that a smaller error influence factor can improve the inversion accuracy.In the example in this paper,the error influence factor is less than 10 to obtain high-precision inversion results.The research in this paper has reference value for improving the accuracy of noise prediction.更多还原