二次矩 meaning in Chinese

second moment

With this understanding , this paper chooses the longitudinal strength of hull girder as the disabled mode , by the calculation of fpso , predicts the ultimate strength and effective lifetime of the hull . expected results of examples are obtained , which provide the analysis data for the further risk assessment
在此前提下，本文选择了船体梁纵向强度失效模式，通过fpso实船计算，分析消化了理想单元法程序软件，预报了船舶极限强度和安全有效寿命期，并用一阶二次矩方法对完整受损船体的结构安全性进行了可靠性的评估，取得了预想的结果，为进一步实施综合安全评估提供了分析数据。