排序方式： 共有11条查询结果，搜索用时 15 毫秒
1.
3.
4.
针对LNG船的特性,研制开发了容重100kg/m3、总厚度为75mm的岩棉A60级耐火舱壁;容重100kg/m3、总厚度为50mm的岩棉A30级耐火舱壁;容重100kg/m3、厚度为50mm的岸棉A60级耐火甲板。经实船应用检验,该绝缘材料均满足LNG船防火材料的使用要求。 相似文献
5.
本文对含敷料板的低阶模态振动特性进行了研究,将敷料与基板处理为层合板模型,采用基于Mindlin假设的4节点板单元对含敷料结构进行数值模拟,得到系统固有振动特性.为了研究敷料结构系统固有频率的合适计算方法,构造了不同基板厚度和不同敷料厚度,分别采用层合模型和敷料层等效质量的简化方法进行了结果对比.在相应计算例题中,对3种基板厚度和5种敷料层厚度共计15个敷料铺层试件进行了振动测量,并与数值模拟结果进行对比.针对不同铺设厚度的敷料板与加筋板,分别采用敷料质量等效模型和层合板模型,给出了不同计算模型的振动特性计算误差,为工程上选择敷料层振动特征计算方法提供了依据. 相似文献
6.
The technology of superabrasive grinding has been developed in order to achieve high-quality finish in extremely hard and brittle materials.Thereafter, truing and dressing technology on super abrasive grinding wheel is one of the most important subjects on precise machining field at present.In this paper, mist-jetting electrical discharge technology was applied to dressing metal-bonded superabrasive wheels.And a systematical study on the mechanism of selective removal of the bond was proposed.Experiments on dressing bronze bonded diamond grind wheels were carried out on a die-sinking electrical discharge machine.The diamond wheel topographies before and after electrical discharge dressing were observed by VH-800 3D digital microscope.The wheel profiles before and after dressing were observed.The results of electrical discharge dressing under different electrical parameters were compared.Experimental results indicate that the favorable surface topography can be obtained under suitable processing parameters and mist-jetting electrical discharge dressing(MEDD) is feasible for metal-bonded diamond grinding wheel. 相似文献
7.
本文着重阐述在建造64000吨级散装贷船中,引进的甲板敷料“HIGHTEX复合涂层教料”施工时出现的质量事故及解决办法,以供分析和探讨。 相似文献
8.
10.
本文从《1974年国际海上人命安全公约》第一套修正案及海大214(Ⅶ届)决议的要求出发,对SD-Ⅰ、SD-Ⅱ型两种不易着火甲板基层敷料的配方作了简略分析。简介了其物理性能,并就防火性能——着火性、发烟性、毒性与国内外有关指标进行了比较。最后,指出了该材料施工注意事项。 相似文献