{'fraction_non_alphanumeric': 0.019021739130434784, 'fraction_numerical': 0.0, 'mean_word_length': 5.5, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Fatigue Life Analysis of Liquid-Filled Pipeline Under the Combined Excitation of Random Vibration and Fluid-Structure Interaction

The objective of this article is aiming at the fatigue problem of the liquid-filled pipeline, which is under the combined excitation of the external complex random loads and the internal fluid-structure interaction vibration caused by the high-pressure and high-speed fluid in the pipeline. By means of theory analysis and simulation, the combined excitation of the liquid-filled pipeline under the complex random load and fluid-structure interaction vibration was studied, and the calculation method of pipeline fatigue life under the combined excitation was given. Based on this, taking the typical ship liquid-filled pipeline as research object, ANSYS Workbench finite element simulation software was used to analyze the pipeline fatigue life under the combined excitation of random vibration and fluid-structure interaction vibration. All these conclusions can provide references for the anti-fatigue design and service life assessment of the ship's pipeline structure.