摘要
统计能量法(SEA)在航空航天和船舶领域进行动力学环境预报方面有着广泛应用,适用于大型、复杂结构与高频率激励环境。但该方法在计算中低频振动噪声时,由于众多子系统动力特性差异,动力响应计算将产生很大误差,出现SEA失效问题。近年来出现的FE-SEA混合模型方法可有效解决这一问题,并能实现大型复杂结构的全频域一体化建模,在统一平台上进行低频、中频和高频计算及结果输出,简化建模和不同软件下模型转换,是非常适用于工程的一种方法。本研究探索采用具有上述功能的VAOne软件进行舰艇基座全频域混和法动力学预报,这是国内外的首次探索,具有重要学术与工程价值。
Statistical energy method（SEA） is widely used in the field of aerospace and ship dynamics environmental forecasting,applicable to large complex structure and high frequency incentive environment. However, due to the difference of dynamic response calculation of many subsystems, the method in the calculation of low-frequency noise,vibration and dynamic characteristics will have a very big error or even a SEA failure. In recent years the FE-SEA hybrid model method can be an effective solution to this problem, realize the modeling of complex large-scale structure of the broadband-frequency-range, calculation and output from low to high frequency in the unified platform, simplification of construction modeling and conversion in different modeling software. It is very applicable to the engineering. These studies explore and forecast the broadband-frequency-range dynamics of ships base with hybrid method in the VA One software. It is the first exploration at home and abroad, and works with important academic value.
出处
《舰船科学技术》
2009年第2期71-75,共5页
Ship Science and Technology
基金
国家自然科学基金资助项目(10672100)
