舰载设备在进行抗水下爆炸冲击设计时首先需要确定基础冲击时域信号作为输入载荷。相关标准规范给出的设计冲击谱不能反映实船水下爆炸冲击信号的动态特性。而实船试验测试数据又不具备标准性。为获取舰载设备仿真校核评估的冲击输入载荷，提出一种舰艇水下爆炸冲击信号拟合方法。根据标准设计冲击谱，通过傅立叶变换对实测信号进行修正。采用这种方法得到的冲击信号同时包含了设备安装部位的冲击特性和标准设计谱的冲击量值，能够更准确的反映舰载设备在特定安装部位处的标准冲击环境。

The base shock signal should be evaluated for the naval ship components shock design. The standard shock response spectrum does not contain the complex dynamic characteristics of ship shock. While the shock data recorded in a ship shock test can’t be a standard.A naval underwater explosion shock signal curve fit method is developed for naval equipment anti-shock simulation and evaluation. Fourier transform is adopted to correct the measured signal curve fit with the standard design shock response spec-trum. The corrected shock signal keeps both the real shock property and the quantity of the standard design shock response spectrum. It represent naval vessel shock environment on specification position in real un-derwater explosion shock scene.