90米甲板运输船结构设计与有限元计算外文翻译资料

 2022-09-20 10:32:47

[1] Hamid Ahmadi amp; Mohammad Ali Lotfollahi-Yaghin.A deformation limit based on failure assessment diagram for fatigue-cracked X-joints under in-plane bending. SHIPS AND OFFSHORE STRUCTURES Volume 11, Issue 2, February 2016, pages 182-197

Abstract:

This study develops a deformation limit based on the failure assessment diagram (FAD) for fatigue-cracked circular hollow section (CHS) X-joints subjected to brace in-plane bending. The proposed approach calibrates against two reported experimental tests on CHS X-joints. The subsequent numerical study considers CHS X-joints with two different brace-to-chord intersection angles. The parametric study focuses on both the material toughness level and the geometric parameters. The proposed, dimensionless deformation limit covers a wide range of material fracture-toughness and geometric parameters. The option 1 and option 3 failure assessment curves provide consistent deformation limits compared to the toughness-based deformation limits proposed in a previous study. The lower bound deformation limit exhibits an approximately linear relationship with respect to the crack-depth ratio for X-joints with different brace-to-chord intersection angles. The extrapolated deformation level at a zero crack-depth ratio represents a conservative estimation on the deformation level for intact joints.

[2] Patrik Passon amp; Kim Branner.Condensation of long-term wave climates for the fatigue design of hydrodynamically sensitive offshore wind turbine support structures. SHIPS AND OFFSHORE STRUCTURES Volume 11, Issue 2, February 2016, pages 142-166

Abstract:

Cost-efficient and reliable fatigue designs of offshore wind turbine support structures require an adequate representation of the site-specific wind–wave joint distribution. Establishment of this wind–wave joint distribution for design load calculation purposes requires typically a correlation of the marginal wind and wave distribution. This is achieved by condensation of the site-specific wave climate in terms of wave period or wave height lumping, subsequently used as input for a correlation with the corresponding wind climate. The quality of this resulting wind–wave correlation is especially important for hydrodynamically sensitive structures since the applied met-ocean parameters have a non-linear influence on calculated fatigue design loads. The present article introduces a new wave lumping method for condensation of the wave climate. The novelty is predominantly based on refined equivalence criterions for fatigue loads aiming at preservation of the fatigue damage distribution over either the wave height or wave period distribution. This new method is assessed in comparison with different other traditional wave lumping methods on the basis of the site-specific wave climate for the offshore wind farm project Gemini which has kindly been made available by the developer Typhoon Offshore. It is shown that the new method allows for a significantly better preservation of the hydrodynamic fatigue in comparison to the traditional methods.

[3] Soslash;ren Heide Lambertsen, Lars Damkilde amp; Michael S. JepsenFatigue of thin-walled tubes in copper alloy CuNi10. SHIPS AND OFFSHORE STRUCTURES. Volume 11, Issue 1, January 2016, pages 75-80

Abstract：

The current work concerns the investigation of the fatigue resistance of CuNi10 tubes, which are frequently used in heat exchangers of large ship engines. The lifetime performances of the exchanger tubes are greatly affected by the environmental conditions, where especially the temperature fluctuations and the harsh chloride environment cause fatigue and corrosion problems, respectively. A failure of the tubes will trigger an instantaneous shutdown of the engine. Thus, the paper will focus on a model for fatigue life estimation of the CuNi10 material. In the current case of a ship engine, the temperature fluctuations occur when the engine starts and stops. The difference in temperature at cool down or warm up between the exchanger and the exchange media will cause straining of the tubes. To investigate this phenomenon, a series of strain-based fatigue tests are carried out. Results are evaluated by means of the ASTM E739 guideline and one-sided tolerance limits factor method. The tests show good fatigue resistance and the risk for a failure is low in aspect to the case of a ship heat exchanger.

[4] W. Fricke, H. Remes, O. Feltz, I. Lillemauml;e, D. Tchuindjang, T. Reinert, A. Nevierov, W. Sichermann, M. Brinkmann, T. Kontkanen, B. Bohlmann amp; L. Molter. Fatigue strength of laser-welded thin-plate ship structures based on nominal and structural hot-spot stress approach. SHIPS AND OFFSHORE STRUCTURES. Volume 10, Issue 1, January 2015, pages 39-44

Abstract：

To improve the energy efficiency, the demand for new light-weight solutions has been increased significantly in the last decades. The weight reduction of the current ship structures is possible using thinner plates, that is, plate thickness between 3 and 4 mm. However, at present this is, in normal cases, not possible due to the 5 mm minimum plate thickness requirement given by classification societies. The present paper investigates the fatigue strength of thin-plated ship structures. In the European research proj

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[1] Hamid Ahmadi amp; Mohammad Ali Lotfollahi-Yaghin.A deformation limit based on failure assessment diagram for fatigue-cracked X-joints under in-plane bending. SHIPS AND OFFSHORE STRUCTURES Volume 11, Issue 2, February 2016, pages 182-197

Abstract:

This study develops a deformation limit based on the failure assessment diagram (FAD) for fatigue-cracked circular hollow section (CHS) X-joints subjected to brace in-plane bending. The proposed approach calibrates against two reported experimental tests on CHS X-joints. The subsequent numerical study considers CHS X-joints with two different brace-to-chord intersection angles. The parametric study focuses on both the material toughness level and the geometric parameters. The proposed, dimensionless deformation limit covers a wide range of material fracture-toughness and geometric parameters. The option 1 and option 3 failure assessment curves provide consistent deformation limits compared to the toughness-based deformation limits proposed in a previous study. The lower bound deformation limit exhibits an approximately linear relationship with respect to the crack-depth ratio for X-joints with different brace-to-chord intersection angles. The extrapolated deformation level at a zero crack-depth ratio represents a conservative estimation on the deformation level for intact joints.

基于平面弯曲下X形节点疲劳裂纹失效评定图的一种变形极限。

摘要：

本研究开发了一种基于圆形空心型材（CHS）X形节点受支撑面弯曲的疲劳裂纹的失效评估图（FAD）的变形极限。该方法针对性校核了两个关于CHS X形节点的试验报告。后续的数值研究考虑了CHS X形节点在两种不同支撑梁下的夹角。参数研究的重点集中在材料韧性等级和和几何因素。拟议的无量纲的变形极限覆盖的材料断裂韧性和几何特征范围很广。选项1和选项3的失效评估曲线相比于前面的韧性研究提供了一致变形极限。变形极限的下限值在X节点不同支撑梁夹角下同裂纹深度比例呈现出一种近似线性关系。可以推算出零裂纹深度比例下变形水平是对完整节点变形水平的保守估计。

[2] Patrik Passon amp; Kim Branner.Condensation of long-term wave climates for the fatigue design of hydrodynamically sensitive offshore wind turbine support structures. SHIPS AND OFFSHORE STRUCTURES Volume 11, Issue 2, February 2016, pages 142-166

Abstract:

Cost-efficient and reliable fatigue designs of offshore wind turbine support structures require an adequate representation of the site-specific wind–wave joint distribution. Establishment of this wind–wave joint distribution for design load calculation purposes requires typically a correlation of the marginal wind and wave distribution. This is achieved by condensation of the site-specific wave climate in terms of wave period or wave height lumping, subsequently used as input for a correlation with the corresponding wind climate. The quality of this resulting wind–wave correlation is especially important for hydrodynamically sensitive structures since the applied met-ocean parameters have a non-linear influence on calculated fatigue design loads. The present article introduces a new wave lumping method for condensation of the wave climate. The novelty is predominantly based on refined equivalence criterions for fatigue loads aiming at preservation of the fatigue damage distribution over either the wave height or wave period distribution. This new method is assessed in comparison with different other traditional wave lumping methods on the basis of the site-specific wave climate for the offshore wind farm project Gemini which has kindly been made available by the developer Typhoon Offshore. It is shown that the new method allows for a significantly better preservation of the hydrodynamic fatigue in comparison to the traditional methods.

长期处于风浪条件下冷凝作用对水力敏感的海洋结构物风涡轮机结构疲劳设计的影响

摘要：

海上风涡轮机支持结构的经济高效和可靠的疲劳设计需要足够的有代表性的具体站点的风浪联合分布。以设计载荷计算为目的的风浪联合分布的建立通常需要风浪联合分布的边缘相关性。这是以结合波浪周期和波高考虑的站点风浪条件的冷凝作用来实现的，随后被用于相应的风浪条件相关输入数据。这就导致了风浪相关性对于水力敏感结构尤为重要，因为该应用参数对计算疲劳设计载荷没有线性影响。本文介绍了一种新的波浪因素考虑风浪条件的冷凝的方法。其新颖性显著性基于优化后的疲劳载荷等价准则，目的在于维护任一波高和周期分布下的疲劳损伤。这种新方法的评估是以与其他不同的传统的波集总方法相比较的，它基于站点风浪条件，是海上风电场项目的双子星，其已经被开发商Typhoon Offshore顺利研发。它表明，新的方法相较于传统方法能更好的维护水力疲劳带来的影响。

[3] Soslash;ren Heide Lambertsen, Lars Damkilde amp; Michael S. JepsenFatigue of thin-walled tubes in copper alloy CuNi10. SHIPS AND OFFSHORE STRUCTURES. Volume 11, Issue 1, January 2016, pages 75-80

Abstract：

The current work concerns the investigation of the fatigue resistance of CuNi10 tubes, which are frequently used in heat exchangers of large ship engines. The lifetime performances of the exchanger tubes are greatly affected by the environmental conditions, where especially the temperature fluctuations and the harsh chloride environment cause fatigue and corrosion problems, respectively. A failure of the tubes will trigger an instantaneous shutdown of the engine. Thus, the paper will focus on a model for fatigue life estimation of the CuNi10 material. In the current case of a ship engine, the temperature fluctuations occur when the engine starts and stops. The difference in temperature at cool down or warm up between the exchanger and the exchange media will cause straining of the tubes. To investigate this phenomenon, a series of strain-based fatigue tests are carried out. Results are evaluated by means of the ASTM E739 guideline and one-sided tolerance limits factor method. The tests show good fatigue resistance and the risk for a failure is low in aspect to the case of a ship heat exchanger.

含CuNi10铜合金薄壁管疲劳分析

摘要：

当前工作涉及到含CuNi10管疲劳性能研究，它经常被用于大型船舶发动机的热交换机。热交换管的寿命受环境条件影响显著，以温度波动和含大量氯离子环境导致的疲劳和腐蚀问题。一个管道的故障会瞬间触发一整个发动机的停机，因此，本文重点集中于估算含CuNi10材料疲劳寿命的模型。船舶发动机通常情况下启动和停机会导致温度波动。换热器与换热器之间冷热交替会

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