Experimental study of the static coefficient of friction of a fishing seine on the drum of a friction-type mechanism

Seine fishing – one of the most popular type of fishing (except for trawler). With such method of fishing, working process on the vessel consists of several operations, where seine hauling is the most laborious and time-consuming. Seinehauling friction-type machines are often used for this operation. The main principle of the operation of these mechanisms is based on the friction force, which is carried out by the clutch between seine and drum of friction machine of sufficient force to haul the fishing gear. The main index of this force is the friction coefficient. This article presents a methodology for conducting and the results of experimental studies on the determination of this coefficient for fishing seine on the drum of a friction-type mechanism. The experiments described here are based on the previous work of the author associated with their planning. Net samples with specified parameters corresponding to real seine applied to the fishing were made for the experiments. Each of them interacted with three steel drums of different diameters at different angles of contact arc. By means of strainsensor connected to the strain-station "MIC-200" tension values of the incoming branch (S1) were fixed and graphic dependencies S1 from the time of experiment (t) were built. To determine the behaviour of friction coefficient comparatively to normal contact area (𝐴𝑛), graphic dependencies 𝑆1𝑚𝑎𝑥 = 𝑓(𝐴𝑛, 𝐶э) were built using the obtained maximum values S1 (S1max) and the width of seine bundle on the drum (𝑏б ). After that, the relevant conclusions have been made and the following research has been planned.

1. Zebrova E. M. Issledovanie protsessa triniya skol’zheniya zhguta deli vo friktsionnykh rabochikh organakh rybopromyslovykh mekhanizmov. Avtoreferat diss. kand. tekhn. nauk [Study of the friction-slide process of a seine bundle in frictional working parts of fishing mechanisms. Abstract of dis. can. sci.]. Kaliningrad, 2007, 23 p.

2. Sukonnov A. V. Eksperimental’noe opredelenie zavisimostey koeffitsientov treniya skol’zheniya ot kharakteristik friktsionnykh organov rybopromyslovykh mashin i orudiy rybolovstva. Avtoreferat diss. kand. tekhn. Nauk [Experimental definition of dependencies of the friction-slide coefficients from characteristics of the friction parts of fishing machines and fishing gears. Abstract of dis. can. sci.]. Kaliningrad, 2009, 24 p.

3. Martynov A. N., Nedostup A. A. Analiz metodov rascheta nevodovyborochnykh kompleksov [Analysis of calculation methods of seine-hauling complexes]. Materialy VIII Mezhdunarodnogo Baltiyskogo morskogo foruma “Morskaya tekhnika i tekhnologii. Bezopasnost’ morskoy industrii” [Proceedings of the VIII International Baltic Maritime Forum “Marine technology and engineering. Safety of the marine industry”]. Kaliningrad, 2020, pp. 234–240.

4. Martynov A. N., Nedostup A. A. Metodika planirovaniya eksperimenta po issledovaniyu staticheskogo koeffitsienta treniya zhguta deli na tyagovom barabane mekhanizma friktsionnogo tipa [Methodology for planning an experiment to study the static coefficient of friction of the harness on the traction drum of a friction-type mechanism.]. Izvestiya Kaliningradskogo gosudarstvennogo tekhnicheskogo universiteta, 2022 (v pechati).

5. Martynov A. N., Nedostup A. A. Postanovka zadachi eksperimental'nogo issledovaniya staticheskogo koeffitsienta treniya zhguta deli na tyagovom barabane mekhanizma friktsionnogo tipa [Statement of the problem of the experimental study of the static coefficient of friction of a seine harness on a traction drum of a friction-type mechanism]. Materialy IX Mezhdunarodnogo Baltiyskogo morskogo foruma “Morskaya tekhnika I tekhnologii. Bezopasnost’ morskoy industrii” [Proceedings of the IX International Baltic Maritime Forum “Marine technology and engineering. Safety of the marine industry”]. Kaliningrad, 2021, pp. 353–358.

6. Howard J. S. Experimental Design and Analysis. USA, 2018, 414 p.

7. Hamhanov K. M. Osnovy planirovaniya eksperimenta: metodicheskoe posobie [Planning of experiment basics: methodological guide]. Ulan-Ude, 2006, 94 p.

8. Nedostup A. A., Orlov E. K. Issledovanie staticheskogo koeffitsienta treniya rybolovnykh kanatno-verevochnykh izdeliy na barabane mekhanizma friktsionnogo tipa [Study of the static coefficient of friction of thread-rope products on the drum of a friction-type mechanism]. Trenie i iznos, 2010, vol. 3, no. 4, pp. 403–411.