| 1. | Research on vibration and acoustic radiation of submarine structure
舰艇结构水下振动和声辐射特性研究 |
| 2. | Fatigue life prediction of typical welded joint of submarine structure with surface crack
带初始裂纹的潜艇典型焊接节点试件疲劳寿命分析 |
| 3. | Provided that the submarine structure strength is met , noise is vital to submarine battle ability
在保证潜艇结构强度的前提下，安静性和隐身性对提高潜艇的战斗力至关重要。 |
| 4. | Comparing with the model test data the result of the calculation is more close to that from the formula in " design and calculation standard for submarine structure ( gjb ) "
与实验数据进行比较，其计算结果比利用gjb 《潜艇结构设计计算规则》的计算结果更接近于真实值。 |
| 5. | The using rules about the fatigue strength in " design and calculation standard for submarine structure " is worked out according to the standard that the ultimate time of submergence is less than 500
现行的“潜艇结构设计计算规则”中关于疲劳强度的设计，是按照极限下潜次数不超过500次的标准进行校核。 |
| 6. | Under the influence of dynamical factors such as earthquake and storm surge , the sediment failure on the submarine slope might be triggered to make considerable damage to the submarine structures , so more and more attention has been drawn to the submarine slope stability in recent years
摘要海底斜坡物质受地震、风暴潮等动力因素的影响，其强度变弱，发生失稳破坏，对海底工程设施具有较大的破坏性，引起人们的广泛关注。 |
| 7. | The submarine noise detected by sonar consists of two parts : propeller - generated hydro - dynamical noise , which can be greatly reduced by improving the submarine rear shape ; radiated noise from the submarine structure excited by the centrifugal forces ( moments ) of rotatory machine , which is more complicated and influenced by many factors
声纳所探测的潜艇噪声包括两部分，一是螺旋桨运转带来的水动力噪声，二是潜艇主机工作时产生的不平衡力和力矩引起潜艇结构振动，带动流场振动从而辐射噪声。通过改进潜艇尾部线型设计，已将水动力噪声降到比较低的程度，而结构噪声则复杂得多，与许多因素有关。 |
| 8. | The submarine structure is simplified to single or double infinite cylindrical shell stiffened with rings , bulkheads and stringers , focusing on underwater sound radiation from the single shell . the shell motion is described by donnell ' s theory including excitation forces and reactions of rings , bulkheads , stringers and fluid , which leads to the fluid - structure coupling vibration equation . expressing displacements by velocities , applying modal expansion circumferentially and fourier transformation longitudinally result in the shell ' s modal equations of motion
壳体的运动方程采用较为简单的donnell理论描述，运动方程中包括了激励力、加筋结构(环肋、舱壁和纵骨)和流场对壳体的作用力，从而组成流场-结构的耦合振动方程，并进一步将方程中的位移用速度表示，然后沿轴线方向进行fourier变换，将速度和各项荷载沿圆周方向进行模态展开，得到了壳体振动的模态运动方程。 |
| 9. | The numerical simulation technique is used to study on the fatigue properties of submarine with high strength steel . the numerical simulation model is established and its feasibility is validated . at last , the possibility of establishing a kind of calculation and design methods of fatigue life in submarine structure is primarily analyzed
本文把疲劳裂纹闭合模型通过切片合成法引入到潜艇结构疲劳强度计算上来，建立了潜艇结构疲劳强度的数字仿真计算的数学模型，分析该方法在潜艇结构疲劳强度计算上应用的可行性，为建立一套计算和设计潜艇结构疲劳强度的方法作了初步的探讨。 |
