DUT-1模型冰性能影响因子的试验研究

【作者】 王喜文；

【导师】 李志军； 王永学；

【作者基本信息】 大连理工大学 ， 港口、海岸和近海工程， 2001， 硕士

【摘要】 新世纪海洋利用开发战略的确立，使海上航行、资源开发和沿岸港口护岸建设向更广阔的空间拓展，有关海冰与海上结构物相互作用的研究成为其中的重要环节。本文结合国家杰出青年基金“海冰对结构物作用的理论与试验研究（59725919）”，针对该课题发展的DUT-1非冻结模型冰性能指标的控制因子，试验考查了关键材料—水泥含量、养生时间和类型对模型冰的物理和力学指标的效应。 本文首先介绍分析了当前国内外模型冰研究的现状和趋势，结合渤海海冰的特性、相似原理和实验室现有设备的现状，以发展DUT-1非冻结模型冰为目标，利用现有实验、量测和采集系统，重点研究了水泥含量和养生时间对模型冰的密度、弯曲强度、弹性模量和压缩强度等物理和力学性能指标的影响。通过2000余次试验，获得了7个水泥含量、8个养生时间的4个性能指标，计224个指标的平均值。在此基础上分析了水泥含量、养生时间对4个性能指标的影响并给出统计关系式，同时用三维关系图分别表示它们相互间的关系。这些关系为开展物理模拟试验、有目的地选择合适范围的模型冰性能指标奠定了基础。 最后，本文还探讨了不同压头速率上述4项物理和力学指标的影响，并用简单试验讨论了骨料砂的重复利用问题。更多还原

【Abstract】 With the establishment of the stratagem of ocean exploitation in new century, human activities such as sailing, oceanic resource exploitation and harbor construction etc. will expand to more massive space and the research about interaction between sea-ice and man-made structures increasingly becomes more important. This paper discussed the effects of the key factors-content, curing time and different type of cement on model ice抯 physical and mechanical indexes on the basis of the patent product-the DUT-l Synthetic Model Ice抯 prescription of the Nation Outstanding Youth Fund-攖he theory and experiment research on the interaction between sea-ice and man-made constructions (59725919).? This paper introduced the actuality and trend on model ice research and mainly discussed the influences of cement content, curing time and cement type on the model ice抯 physical and mechanical indexes such as density, flexural strength, elastic modulus and compressive strength combined with the characteristics of Bohai Sea ice and similarity principles on model ice and equipments and apparatuses in existence in order to make progress to DUT-l Synthetic Model Ice. Totally 224 average values of the model ice抯 four indexes on seven cement content levels and eight curing time were given. This paper mainly discussed and offered detailed and credible three-dimension material characteristics control charts for sea-ice physical simulation experiments under different conditions. The influences of cement content and curing time on the model ice抯 physical and mechanical indexes were given combined with the statistic formulas and three-dimension charts. All of these established the basis of physical simulation experiments so as to choose the right ranges of the model ice?indexes. At last, the paper also discussed the influences of different compressive velocity on the model ice抯 physical and mechanical indexes and briefly discussed the feasibility of plastic grit抯 circulation.更多还原