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自卸砂船的砂舱与舱口围板板架直接连接,舱口围板板架直接承受货物重量载荷.通过对某自卸砂船的舱口围板板架直接计算,发现由于〈规范〉不时直接承受货物载荷作用的舱口围板板架进行加强,导致舱口围板板架不满足强度要求.建议应根据货物载荷的大小适当加强舱口围板板架的结构. 相似文献
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《船舶标准化工程师》2016,(3)
对总重1 500 t的钻井船上层建筑整体吊装工艺进行研究,在保证上层建筑预舾装完整性的前提下,设计了吊梁、滑轮和卸扣组成的吊索具型式,制定了整体吊装的工艺方案,同时应用有限元法对吊装过程中的应力和变形进行了校核,并根据计算结果优化吊装方案,从而保证整体吊装作业的顺利进行。 相似文献
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《中国舰船研究》2021,(5)
[目的]开孔高腹板板架结构是在大型邮轮上层建筑中广泛使用的一类特殊结构,为建立此类结构的设计方法,需充分掌握大型邮轮上层建筑典型开孔高腹板板架结构的力学特性。[方法]综合运用经典加筋板理论与非线性有限元方法,分析甲板初始缺陷、纵桁规格、腹板开孔对板架纵向受压极限承载能力的影响规律。[结果]发现薄板板架对于初始缺陷更为敏感且不同于厚板板架的初始变形模式,纵桁对纵压极限能力贡献度较大,纵压极限承载能力对开孔比例、开孔形状敏感性较低,开孔位置决定崩溃破坏屈曲带的位置,进而揭示了开孔高腹板板架的破坏失效模式。[结论]所得甲板初始缺陷、纵桁几何尺寸、腹板开孔诸因素对开孔高腹板板架极限强度的影响规律,可为邮轮结构轻量化设计及安全性评估提供指导。 相似文献
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控制长大T形钢筋笼的起吊变形,是超深T形地下连续墙施工需要解决的质量大技术难题之一。在分析目前抬吊法吊装地下连续墙钢筋笼不足的基础上,提出并研究抬架垂直转体法吊装钢筋笼新技术的原理和工艺,并将其成功应用于埃及塞得东港集装箱码头二期工程项目的超深T形地下连续墙施工。施工效果证明,该新技术能很好地解决抬吊法存在的问题,简化起吊的工艺,提高起吊作业的效率及安全性,减少钢筋加劲桁架的数量,具有显著的经济效益,适用于连续墙所有形状的长大钢筋笼吊装施工。 相似文献
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本文结合自卸船A架的结构特点及其受力分析,展开对其整体吊装工艺的研究。实船施工中采用了分段建造、坞内总装、先搪孔后焊接,以及水上吊装A架上部等工艺技术,高质量地完成了自卸船的A架定位安装,取得了良好的经济效益。 相似文献
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Based on the traditional Smoothed Particle Hydrodynamics (SPH) algorithm, the linked-list search algorithm combined with the variable smoothing length and square support domain was put forward to improve the calculation efficiency and guarantee the calculation accuracy. The physical process of high velocity fragment impact on a broadside liquid cabin was programmed for simulation. The numerical results agreed well with those of the general software ANSYS AUTODYN, which verifies the effectiveness and feasibility of the numerical method. From the perspective of the outer plate thickness of the liquid cabin, the width of the liquid cabin, and incident angle of the fragment, the influence of these parameters on protective mechanisms was analyzed to provide a basis for protective design of a broadside liquid cabin. Results show that the influence of outer plate thickness is not obvious; therefore, the conventional design can be adopted in the design of the outer plate. The width of the liquid cabin has a great influence on the residual velocity of the fragment and the width of the liquid cabin should be designed to be as wide as possible under the premise of meeting other requirements. There is a certain incident angle in which the velocity attenuation of the fragment is most obvious, and the high-pressure zone near the inner plate is asymmetric. The inner plate of liquid cabin should be strengthened according to the hull form, principal dimensions, and vulnerable points. 相似文献
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Wei Zhang Chao Wu Wenshan Yang Shanshan Xu Shaofei Ren . China Ship Development Design Center Wuhan China . College of Shipbuilding Engineering Harbin Engineering University Harbin China 《船舶与海洋工程学报》2011,(3)
Due to the unique structural mode and material property of a composite sandwich plate, related research such as fragment impact resistance of a composite mast is short of publication and urgent in this field. In this paper, the commonly accepted sandwich core board theory was modified. Damage caused by a fragment attack was simulated onto a sandwich plate model built with solid and shell elements. It was shown that shear failure and vast matrix cracking are the main reasons for outer coat damage, and tensio... 相似文献