Evaluation of structural strength of marine lng fuel tank under collision impact load
Aiming at the structural safety of LNG bunker tanks of LNG-fuelled ships under the occurrence of collision accidents,the finite element analysis model was established by applying the finite element method,and the methods of calcu-lation and loading of collision loads and structural strength evaluation were formed with reference to the code,and a solution for the structural safety evaluation of marine LNG bunker tanks under the action of collision impact loads was proposed.Simulation calculations and analyses were carried out with the 18 m3 marine LNG fuel tank as the research object,and the stress levels and overall structural safety of the LNG fuel tank barrel,head,support structure between the inner and outer ves-sel and saddle were evaluated under the action of collision loads.The results show that:the stresses in all components of the marine fuel tank are less than the permissible values in the code,the strength meets the requirements and conforms to the in-dustry code,verifying the feasibility of the finite element analysis method in the structural strength evaluation of LNG fuel tanks;the inner vessel is the structure most prone to failure under working conditions,and its maximum stress can reach 123.63MPa,which is 13.07MPa different from the permissible value.
LNG fuel tankstructural strengthfinite element analysis method
万方数据
维普
