舱壁

• Matlab procedure is coded to compute the far - field sound pressure levels of the shell excited by radial point force . the influences of modal truncation , stringers , bulkheads and damping on the shell ' s far - field sound pressure are analyzed , laying down the basis for accurate analysis of the sound radiation from fluid - loaded reinforced double cylindrical shells
  本文用matlab编制程序求解了单层壳在径向激励力作用下的远场声压级，分析了模态截断数、纵骨、舱壁板、结构阻尼等因素对壳体远场辐射声压的影响，为准确计算加筋双层壳在水下振动和声辐射特性奠定了基础。
• Abstract : fatigue cracks in ship hull structures are most likely to occur in the highly stressed structural details . the conventional fatigue analysis is largely dependent on the determination of stress concentration factors ( scfs ) at the locations considered . this paper is concerned with the stress concentration of cutout in transverse web for longitudinal stiffener . a series of finite element models is carried out for the stress analysis of predefined structural details . the tabulated scfs of typical cutouts ( abs tanker rules ) in transverse web for longitudinal stiffeners are presented based on the finite element analysis ( fea ) results
  文摘:疲劳裂纹往往发生在船舶结构的局部高应力区,而疲劳分析结果通常取决于任何准确确定结构的应力集中系数.本文研究为铺设纵骨而在舱壁板上开孔的应力集中,采用有限元方法对预先给定的结构进行应力分析,基于有限元计算结果给出了舱壁板典型开孔(参见abs油船规范)的应力集中系数表
• Then fourier transformation is employed to solve equations of motion of the rings , bulkheads , stringers and fluid respectively , with their reactions ( moments ) expanded by the shell ' s in - vacuo modes . by means of continuity conditions on the interfaces between the shell and the stiffeners as well as the fluid , and inverse fourier transformation , the modal reactions ( moments ) are finally expressed by the shell ' s modal velocities
  然后用fourier变换分别求解环肋、舱壁、纵骨和流场的运动方程，将它们对壳体的作用力(力矩)用壳体周向模态展开，利用它们与壳体在连接处位移连续条件以及fourier逆变换得到用壳体速度表示的模态相互作用力(力矩) 。
• This platform is then used to study the temperature distribution and fluctuation of module ' s wall , the fluctuations of thermal control system , temperature and humidity in the cabin for the short and long cycles of the thermal environment changes . this thesis suggests a temperature control method for cooling loops , a temperature and humidity control method of the cabin air and simulates their effectiveness
  用该平台仿真了舱壁的温度分布及波动特点，研究了热辐射环境的短周期和长周期波动及舱内热负荷波动对热控制系统及舱内空气温度、湿度造成的动态影响；给出了热控回路温度控制方法，利用最佳去湿流量的概念提出了具有回热流程的舱内空气温度、湿度控制方法，对控制效果进行了动态仿真。
• According to the fea model of 110 , 000dwt oil tank , the distribution of the stresses of the model in more than ten kinds of load cases is calculated . the structural strength of the ship is assessed . the buckling assessment of the main ship plating such as the deck , bottom , side shell , inner shell , longitudinal and transversal bulkhead is undertaken
  针对各种规定的计算载荷工况，对该船船体结构进行了强度校核。并对其主要的船体板如甲板、底板、舷侧、内壳和纵横向舱壁板等板格进行了平板屈曲校核。
• First divides the protection structure into the bumper and the rear wall , separately study the impact effect of two plates , the recombination is taking together the overall construction research ; secondly , the protection structure took the overall construction , puts the witness plate behind the rear wall , through surveys the real wall and the witness plate damage traces narrates the projectile destructiveness , the form of witness plate are one layer thick plate or multilayered thin plates
  一是把防护结构分成防护屏和舱壁两层单板分别研究其撞击效应,再结合在一起作为整体结构研究;二是把防护结构作为整体结构,在舱壁后面放观测板,通过测量舱壁和观测板的损伤来描述弹丸破坏程度,观测板的形式分为一层中厚板和多层薄板。