Drilling for oil and gas resources in the polar region requires mooring platforms to have good positioning performance.A large proportion of platforms currently operating in polar regions are open horizontal platforms modified to resist ice.In this work,the interaction process between sea ice and a mooring platform is simulated numerically based on circumferential crack method and the influence of different environmental loads in polar re-gions on the dynamic response of mooring drilling platforms are investigated.With the redevelopment of the moor-ing analysis software ANSYS AQWA,the time domain analysis of the drilling platform and the environmental loads are performed,and the dynamic response of the mooring platform in different environments is analyzed re-spectively.To study the performance of the mooring drilling platform working in the ice-free environment with ice-resistance improvement,an orthogonal experiment is designed with polar extreme sea conditions to investigate the influence of mooring system parameters on the platform response.The research results indicate that reasona-ble selection of the number of mooring cables,the angle of the cable and the pretension can effectively reduce platform drift and increase safety factor.Finally,a mooring system design strategy is proposed to meet the re-quirements of rules in polar environment.This strategy can provide a certain reference in the subsequent practical engineering.
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