Finite cylindrical shells with stiffener are major structure of cabin on the submerged or underwater vehicles 有限长加肋圆柱壳体结构是潜艇、鱼雷等各种航行器舱段的典型结构形式。
After reviewed the development and actuality of dome structure , a new type of pre - stressed ribbed dome was presented in this thesis 本文在回顾了穹顶结构的发展及其研究现状之后，提出了一种新型的加肋预应力穹顶结构。
Noise control can be well actualized with understanding of the acoustics characters of thin plate , cylindrical shell , stiffened plate and stiffened shell in liquid medium , which are the most common structure of car , aircraft and ship 薄板、圆柱壳、加筋板、加肋圆柱壳是汽车、轮船、飞机等交通工具中的结构组织形式，了解他们在流体介质中的声学特性有助于对他们实施有效的减振降噪措施。
The low frequency noise of the ring - stiffened cylinder with double shell is depressed by increasing structure stiffness , the numerical simulation is adopted to evaluate the acoustics performance , find that the vibration and acoustic radiation of the structure could be depressed by increasing the structure stiffness within the discontinuous range of the low frequency 摘要通过增大双层加肋圆柱壳的刚度降低低频噪声，使用数值仿真技术，评价结构的声学性能，发现增大双层加肋圆柱壳结构刚度，可在低频段有限频率范围降低结构的振动与声辐射。
The linear solution and nonlinear solution were compared , the structure ' s obvious geometrical nonlinear character was found . then the buckling analysis of the structure was made , and compared corresponding dome , the conclusion was made that ribbed truss and pre - stressed cables improved the structure ' s limit buckling load . at one time , the buckling analysis of structures with different rise - to - span were made , and discovered that buckling load and stability can be improved with high rise - to - span 通过对该结构的线性解和非线性解的比较，发现结构具有明显的几何非线性特征；对加肋预应力穹顶结构作了屈曲分析，并将它的结果与相应的单层网壳作了比较，得出了由于肋桁架和预应力索的存在，加肋预应力穹顶结构的极限载荷大幅度提高，比一般的单层网壳结构具有更好的稳定性能的结论。
Afterward , element internal forces and node displacements under the el - centro are studied by time - history method , the conclusion was obtained that the pre - stressed ribbed dome structure has a good dynamic performance , but at the same time , it ' s been pointed out that the pre - stress is necessary to structure , without it , the structure may be destroyed 然后，通过对结构在el - centro地震波作用下内力和位移时程曲线的分析，发现该加肋预应力穹顶结构具有良好的动力性能；但同时指出在索中没有施加预应力的情况下，结构将容易遭到动力破坏。
