谱跌效应的参数化研究

Research on Parameterization of Spectrum Dip Effect

在舰船设备的抗冲击性能考核中,由于设备结构惯性力与基础输入之间的相互作用,设备的实际冲击环境常存在谱跌效应,若忽略这一影响将引起冲击考核的较大误差。将多自由度系统冲击响应分析与实验设计统计相结合,对谱跌效应的各个影响因素进行研究,得出了谱跌效应的主要影响因素和变化趋势。通过构造近似模型,得出了谱跌加速度谱和速度谱的多因素经验公式。

Due to the interaction between inertia force of equipment structure and basic input,a spectrum dip effect exists in the actual impact environment. Big error may be caused in impact assessment if this factor is ignored. The shock response analysis of multi-degree-of-freedom system and DOE( design of experiment) are combined to research the factors affecting on the spectrum dip effect. The main influencing factors and the variation tendency of spectrum dip effect are obtained. The empirical equation with multifactors for predicting acceleration spectrum and velocity spectrum is generalized based on constructed approximate model.