统计能量分析方法能够有效预示舰船和车辆等结构的高频振动及噪声。本文通过建立两子结构耦合模型,利用差分法研究了瞬态统计能量分析中参数误差对子结构响应能量的影响,同时给出了参数误差与所导致能量误差的关系函数。结果表明:对于外载荷直接激励的子结构,内损耗因子和耦合损耗因子的误差都会导致被预示总能量的减小。对于外载荷间接激励的子结构,内损耗因子的误差会导致峰值能量的减小,而耦合损耗因子的误差会导致峰值能量的增加。本文内容对改进动力学系统数值模型以及提高结构振动和噪声预示精度有一定的帮助。
Statistical energy analysis (SEA) method has been recognized as a powerful tool in predicting the highfrequency sound and vibration of ship structures and vehicles. In the transient statistical energy analysis framework, this paper applies the difference method to investigate the effect of parameters error on structural total energy. Meanwhile, the function relation of parameters error and caused energy error is also provided. The following results can finally be shown. For the subsystem that is directly excited by an external load, the error of the damping loss factors and coupling loss factors will result in the decrease of structural total energy. For the subsystem that is indirectly excited, the error of damping loss factors can lead to the decreasing of structural peak energy, while the error of coupling loss factors will result in the increase of structural peak energy. The content of this paper can provide some help for improving the dynamics model and predicted accuracy of sound and vibration.
2016,38(4): 38-41 收稿日期：2015-07-02
DOI：10.3404/j.issn.1672-7619.2016.04.008
分类号：V415.4
基金项目：国家自然科学基金资助项目(11372084)
作者简介：宋海洋(1986-),男,博士,研究方向为高频振动和噪声环境的预示。
参考文献：
[1] HYNNá P, KLINGE P, VUOKSINEN J. Prediction of structure-borne sound transmission in large welded ship structures using statistical energy analysis[J]. Journal of Sound and Vibration, 1995, 180(4):583-607.
[2] 邵亮. 统计能量法在船舶舱室噪声预报中的应用[J]. 舰船科学技术, 2012, 34(5):98-100, 107. SHAO Liang. Prediction and research of ship cabin noise with statistical energy analysis[J]. Ship Science and Technology, 2012, 34(5):98-100, 107.
[3] YAYLADERE B C, ÇALIŞKAN M. Prediction of noise levels within a submerged vessel by statistical energy analysis[C]//Proceedings of the 20th International Congress on Sound & Vibration. Bangkok, Thailand:ICSV, 2013:66-71.
[4] CHEN S M, WANG D F, LEI Y F. Automotive interior noise prediction based on single sound cavity using statistical energy analysis method[J]. Noise & Vibration Worldwide, 2011, 42(11):36-43.
[5] 程广利, 朱石坚, 伍先俊. 统计能量分析法及其损耗因子确定方法综述[J]. 船舶工程, 2004, 26(4):10-15. CHENG Guang-li, ZHU Shi-jian, WU Xian-jun. A summary of statistical energy analysis method and its loss factor's determination[J]. Ship Engineering, 2004, 26(4):10-15.
[6] 叶敏, 郎作贵, 郝志勇. 复杂系统振动能量平衡方程中SEA参数的测定[J]. 内燃机学报, 1998, 16(4):469-474. YE Min, LANG Zuo-gui, HAO Zhi-yong. The determination of vibration energy balance sea system parameters in a complex structure[J]. Transactions of CSICE, 1998, 16(4):469-474.
[7] 盛美萍, 王敏庆, 孙进才, 等. 非保守耦合系统的等效内损耗因子[J]. 声学学报, 1997, 22(6):555-561. SHENG Mei-ping, WANG Min-qing, SUN Jin-cai, et al. Equivalent internal loss factors for non-conservatively coupled systems[J]. Acta Acustica, 1997, 22(6):555-561.
[8] 盛美萍, 王敏庆, 孙进才. 非保守耦合系统的耦合损耗因子[J]. 声学学报, 1999, 24(5):550-556. SHENG Mei-ping, WANG Min-qing, SUN Jin-cai. The coupling loss factors of non-conservatively coupled systems[J]. Acta Acustica, 1999, 24(5):550-556.
[9] MAO B Y, XIE S L, XU M L, et al. Simulated and experimental studies on identification of impact load with the transient statistical energy analysis method[J]. Mechanical Systems and Signal Processing, 2014, 46(2):307-324.
