Lee Du-Yong, Jo Jae-Sang, Nyongesa Antony John, Lee Won-Ju
Korea Marine Equipment Research Institute, Busan 46754, Republic of Korea.
Division of Marine Engineering, Korea Maritime and Ocean University, Busan 49112, Republic of Korea.
Materials (Basel). 2023 Jan 2;16(1):428. doi: 10.3390/ma16010428.
The demand for Liquefied natural gas (LNG) has rapidly increased over the past few years. This is because of increasingly stringent environmental regulations to curb harmful emissions from fossil fuels. LNG is one of the clean energy sources that has attracted a great deal of research. In the Republic of Korea, the use of LNG has been implemented in various sectors, including public transport buses, domestic applications, power generation, and in huge marine engines. Therefore, a proper, flexible, and safe transport system should be put in place to meet the high demand. In this work, finite element analysis (FEA) was performed on a domestically developed 40 ft ISO LNG tank using Ansys Mechanical software under low- and high-cycle conditions. The results showed that the fatigue damage factor for all the test cases was much lower than 1. The maximum principal stress generated in the 40 ft LNG ISO tank container did not exceed the yield strength of the calculated material (carbon steel). Maximum principal stress of 123.2 MPa and 107.61 MPa was obtained with low-cycle and high-cycle analysis, respectively, which is 50.28% less than the yield strength of carbon steel. The total number of cycles was greater than the total number of design cycles, and the 40 ft LNG ISO tank container was satisfied with a fatigue life of 20 years.
在过去几年中，对液化天然气（LNG）的需求迅速增长。这是由于抑制化石燃料有害排放的环境法规日益严格。LNG是吸引了大量研究的清洁能源之一。在大韩民国，LNG已在包括公共交通巴士、家庭应用、发电以及大型船舶发动机等各个领域得到应用。因此，应建立一个合适、灵活且安全的运输系统以满足高需求。在这项工作中，使用Ansys Mechanical软件在低周和高周条件下对国内开发的40英尺国际标准组织（ISO）LNG储罐进行了有限元分析（FEA）。结果表明，所有测试案例的疲劳损伤因子均远低于1。40英尺LNG ISO储罐容器中产生的最大主应力未超过计算材料（碳钢）的屈服强度。低周和高周分析分别获得了123.2 MPa和107.61 MPa的最大主应力，比碳钢的屈服强度低50.28%。循环总数大于设计循环总数，并且40英尺LNG ISO储罐容器满足20年的疲劳寿命要求。
