纵向箱型梁舱段极限强度试验研究

摘要

极限强度是船体结构设计中的重要指标,试验研究是船体纵向极限强度的重要方法.纵向箱型梁是一种已运用在国外舰船上的新型结构型式.鉴于目前国内对此类结构型式的试验研究还不够充分,本文对此型式的舱段模型进行极限强度试验,观察并记录其崩溃过程.应用逐步崩溃法和非线性有限元数值方法进行模型极限强度预报.试验结果证实了极限强度理论计算方法的可靠性,其中国际船级社协会推荐的MARS2000软件的计算结果略偏保守.本试验可以为纵向箱型梁的结构设计提供参考依据.%Ultimate strength is an important target in ship structure design.Experiment is an important method for the research on hull longitudinal ultimate strength.Currently, domestic related experiment is not substantial.As a new structure type, longitudinal box girder is set on foreign frigate.Ultimate strength experiment of longitudinal box girder model is conducted, and the collapse process is observed and analyzed.SMITH and nonlinear FEM method are adopted to predict ultimate strength of the model.Experiment result proves the reliability of theoretical ultimate strength method.The calculation result of MARS2000 recommended by IACS is on the conservative side.This experimental research can offer design references for longitudinal box girder structure.