Because complexity of ship structure and exterior carry loads , accurate forecast of construction strength is a very difficult mission 由于船舶结构本身的复杂性以及外部载荷的复杂性，准确预报结构强度一直是一项非常困难的任务。
The purpose of this analysis is to provide some valuable suggestion for risk assessment of ship hull and the plan for maintenance actions 本文的研究结果对船舶设计、检验和营运部门进行船舶结构主体风险评估和制订维修计划具有一定的参考意义。
Catia - structure preliminary layout 2 ( spl ) defines hull shape ， identifies main decks and bulkheads and characterizes general arrangements 该产品为船舶制造业的设计人员提供了设计工具，主要应用在传播设计的初始阶段，进行船舶结构元素的早期定义。
Finite element method has been introduced in the ship structural intensity analysis since long time ago , and it has been widely used after the long - term accumulation 有限元法很早就被引入到船体结构强度分析中，经过几十年的积累，船舶结构有限元分析已经得到广泛的应用。
Otherwise the thesis made according analysis when active cable was stationed on the different parts of ship . its results proved that it can have better effect when stationed on 0 . 8l 本文还对作动器放置于不同的位置时进行了仿真计算，研究表明，作动器位于0 . 8l处可以比较好地对船舶结构实施控制。
In the field of ship structure , foreign countries and china have researched on reduce ship ' s mechanical vibration using active control method and have had excellent effect 在船舶结构振动控制方面，运用主动控制方法抑制船舶结构的振动，国内外的学者也已经做了大量的研究，取得了很好的实际应用效果。
It was still in the groping phase of the study on active control of ship structural vibration by slamming and it need a long time to put it in use because of ship structural complexity 对于船舶结构砰击响应主动控制的研究，尚处于一个摸索的阶段。由于船舶结构的复杂性，它的实际应用还要相当长的发展阶段。
But as the ship structure system is very big and complicated , and there are many stochastic variables , not much progress have been made in application the structural reliability base on sfem to the ship structure 但由于船舶结构体系庞大，随机变量众多，基于随机有限元的可靠度分析在船舶结构中应用缓慢。
The effect of the crack eccentricity ratio on the stress intensity factor and the ultimate tensile strength for cracked ductile plates was investigated in this paper 摘要疲劳裂纹对船舶结构强度具有不可忽视的削弱作用，在过去的研究中，主要从断裂力学的角度对疲劳裂纹应力场进行分析，而对于静态裂纹板的极限强度的探讨相对较少。
For the increase of ship size and the development of new ship type , every classification society in the world is searching for reasonable and reliable new design method . then ship structural direct calculation method is used more widely than before 由于船舶尺度的增大以及新船型的开发，世界各国的船级社都在寻找既先进科学又合理可靠的新的设计方法，因此船舶结构强度直接计算法的应用日趋广泛。
