###### Abstract
[PERSON] et al. [16] used computational fluid dynamics to study the effects of increased trim and draft on ship resistance in shallow and confined waters. The research results show that trim can compensate for increased drag caused by hull draft, but the increased drag is more sensitive to ship speed. Marine biological pollution will not only cause great harm to ship machinery and the coating system but also affect ship resistance. [PERSON] et al. [17] studied the effect of marine biological pollutants on ship resistance based on the modified k-\(\varepsilon\) model, which showed that the additional resistance caused by the height, shape, hardness, and density of biological fillers accounted for about 80% of the total resistance under the condition of heavy pollution. [PERSON] et al. [18] used a computational fluid dynamics method based on the roughness function model of hard dirt to study the resistance variation law of a contaminated plate. The simulation results were consistent with the experimental results. Then, it was applied to the analysis of the full-scale resistance characteristics of two merchant ships. An open-source software, with an integrated rough wall function model was used by [PERSON] et al. [19] to study friction and total resistance under smooth surface conditions to predict ship friction resistance with different degrees of slime and dirt. In addition to studying the resistance of ships in ordinary waters, the researchers further analyzed the ice resistance of ships sailing in extremely cold waters. [PERSON] et al. [20] proposed a semi-empirical model of ship resistance prediction in horizontal ice based on the Lindqvist model, which analyzed the role of the contact coefficient in ice resistance prediction and could be used for ship total resistance prediction. [PERSON] et al. [21] proposed a virtual mass method based on the combination of CFD and DEM, which realized the prediction of the total resistance of ships sailing in the floating ice area. [PERSON] et al. [22] established a numerical model based on the non-smooth discrete element method to study the influence of floating ice shape on ship resistance when the ice sheet was composed of relatively small and unbreakable floating ice under the condition of low concentration of broken ice. [PERSON] et al. [23] believe that ship resistance is strongly correlated with ship beam, hip Angle, waterline Angle, ship speed, ice concentration, ice thickness, floe ice diameter, and other factors, so an empirical equation is established, which has great practical significance for predicting ship fuel consumption and improving navigation safety. Although researchers have conducted a lot of research on ship resistance under different conditions, most of the research results cannot meet the requirements of efficient, simple, and convenient application. Therefore, the ship resistance of a ship model with a fixed scale ratio under different displacements, speeds, and attachments was tested to analyze the change law of ship resistance under the condition of a single factor by means of experimental research in this paper. Thus, the mathematical relationship between the influence factors of real ship power and resistance was established to study the coupling effects of multiple factors on real ship power. The research results have certain guiding significance for ship design.