CAJ | 학술논문

舰艇冲击响应具有明显的非平稳与非线性特征,传统的Fourier变换分析应用受限.文章利用短时Fourier变换(STFT)分析技术研究冲击响应的时频变化特征,计算结果证明了该分析方法可比较精确地描述舰艇船体结构与舰用设备冲击响应频率特性随时间的演化特征.该研究成果可以为舰艇抗冲击指标细化分析与极限冲击载荷研究提供技术支持.
함정충격향응구유명현적비평은여비선성특정,전통적Fourier변환분석응용수한.문장이용단시Fourier변환(STFT)분석기술연구충격향응적시빈변화특정,계산결과증명료해분석방법가비교정학지묘술함정선체결구여함용설비충격향응빈솔특성수시간적연화특정.해연구성과가이위함정항충격지표세화분석여겁한충격재하연구제공기술지지.
@@@@The course of shock response of warship cannot be exactly analyzed by traditional Fourier trans-form because of its obvious character of non-stationary and non-linearity. In this paper, the short time Fourier transform (STFT) is used to analyze the time-frequency variation of impact response. This method can exactly represent the frequency evaluative character of impact response of the shipbuilding structure and ship’s equipment. The results of this study can provide the technical support for the detailed analy-sis of warship anti-shock rule and the investigation of limit impact load.