宁波329国道北仑至三山线公路工程区内断裂遥感研究

结合一个具体的工程项目，就遥感技术应用于公路工程地质勘察时的技术路线、技术方法进行了阐述，并重点介绍了工程区内断裂的研究结果，对工程的设计与施工提出了建议。     

单射线折射波能分布计算(水波线性理论)

通过对水波折射线性理论的述评，提出折射现象的若干基本事实 ，对于（相对）缓坡，利用底侧壁面对入射波的全反射作用和近似的波幅矢平衡原理，求得缓坡上单射线折射波能分布算式，结果与传统的波向线法接近，对于（相对）陡坡和大控制行进角，根据相应的基本事实 ，引入马赫反射特征，改造缓坡单射线公式，得到陡坡上单射线折射波能分布的计算公式（群）。     

The effect of plastic constraint on the initiation of ductile tears in shipbuilding structural steels

In this paper, the effect of plastic constraint on the initiation of ductile tears in four different shipbuilding structural steels has been experimentally studied by measuring the J-integral and crack opening displacement COD at initiation in three-point bend specimens with deep and shallow notches. Experimental results of seven groups of different strength alloy steels show that both Si and Ji values of ductile tear from the shallow crack specimens which have less constraint flow field are significantly higher than those of deeply notched specimens. Slip-line-field analysis shows that, for shallow crack, the hydrostatic stress is lower than that from standard deeply cracked bend specimen, which develops a high level of crack tip constraint, provides a lower bound estimate of toughness, and will ensure an unduly conservative approach when applied to structural defects, especially if initiation values of COD and J-integral are used.     

某轮主机活塞环异常断裂原因分析

此文结合活塞环的工作条件，对某轮主机气环异常断裂原因进行了分析，并针对该故障的诱发原因对柴油机日常维护管理提出了建议。