Nelinearno valjanje broda pod dejstvom vetra i talasa
Nonlinear rolling of ships due to wind and waves
2010
Authors
Bačkalov, IgorContributors
Hofman, MilanRadojčić, Dejan
Motok, Milorad
Čolić, Vladeta
Radmilović, Zoran
Doctoral thesis (Published version)
Metadata
Show full item recordAbstract
Proračun valjanja broda na uzburkanom moru predstavlja jedan od najznačajnijih problema dinamike broda. Uobičajeno je da se problem rešava linearnom jednačinom valjanja broda na talasima, pri čemu se uticaj vetra zanemaruje, a dobijena rešenja važe samo za male uglove nakretanja. Nasuprot tome, istraživanje predstavljeno u ovom radu zasniva se na nelinearnim diferencijalnim jednačinama kretanja broda izloženog stohastičkom dejstvu neregularnih bočnih talasa i udara bočnog vetra koje simuliraju ponašanje broda u realnoj bočnoj oluji. Statističkom analizom zakona valjanja određuje se verovatnoća gubitka stabiliteta broda: prevrtanja, velikih uglova nakretanja ili naplavljivanja kroz nezaštićene otvore. Ovaj postupak nazvan je probabilistička analiza sigurnosti broda u oluji. U radu su predstavljeni matematički modeli sa jednim i sa dva stepena slobode: nezavisne nelinearne jednačine valjanja i spregnute nelinearne nezavisne jednačine valjanja i zanošenja morskih brodova izloženih dejstvu... promenljivog bočnog vetra i neregularnih talasa i rečnih brodova pod dejstvom promenljivog bočnog vetra. Svaki model sadrži više izvora nelinearnosti: moment stabiliteta aproksimiran polinomom visokog stepena, nelinearno prigušenje kretanja, moment vetra. Posebna pažnja poklonjena je ispravnom modelovanju haotičnog, udarnog vetra. Probabilistička analiza može se koristiti u raznovrsnim problemima sigurnosti broda. Razvoj novih propisa o stabilitetu broda jedna je od oblasti u kojima ovaj pristup nalazi primenu. U radu je predstavljen koncept mogućih probabilističkih propisa o stabilitetu morskih i rečnih brodova. Probabilistički postupak primenjen je i u istraživanju uzroka pomorskih nesreća (nesreća broda Kugar Ejs, iz 2006. godine). Primena probabilističke analize u postupku projektovanja na osnovu rizika omogućava uvođenje inovativnih tehničkih rešenja nastalih u cilju povećane efikasnosti i sigurnosti. Definicije opsega prihvatljivih metacentarskih visina i optimalne metacentarske visine morskih brodova predstavljaju verovatno najznačajniji doprinos rada projektovanju na osnovu rizika. Osim toga, rezultati analize sigurnosti brodova unutrašnje plovidbe, dobijeni probabilističkim postupkom, iskorišćeni su kako bi se dobile neke smernice za projektovanje rečnih kontejnerskih brodova.
Rolling of ships in severe weather is one of the most important problems of ship dynamics, which is typically solved by using a linear differential equation of rolling; the influence of wind is neglected and the obtained solutions are valid for small roll angles only. However, the research presented in this thesis makes use of a very dissimilar approach, based on dynamics of a ship subjected to stochastic action of irregular beam waves and gusting beam wind. Acquired time history is statistically analyzed in order to assess the probability of a ship stability failure: capsize, large amplitude rolling or flooding through unsecured openings. This approach is denoted as the probabilistic analysis of ship safety. The thesis introduces following mathematical models, developed in the course of the research: nonlinear differential equations of roll and coupled nonlinear differential equations of sway and roll of seagoing ships exposed to beam waves and wind gusts and inland vessels subjected... to gusting wind. Probabilistic analysis may be used in a variety of ship safety problems. The thesis introduces concepts of possible future probabilistic ship stability regulations, both for the seagoing and inland vessels. The thesis also proposes options for the improvement of the present stability regulations for inland container vessels. The probabilistic approach was used to conduct analysis of one of the most significant maritime accidents in 2006, the car carrier Cougar Ace case. The application of the probabilistic analysis in the risk-based ship design emerges as a promising technique for introduction of innovative solutions that may provide increased efficiency and safety. Probably the most significant contribution of the thesis to the field of risk-based design is the definition of the range of acceptable metacentric heights of seagoing ships. Additionally, the probabilistic analysis was used to develop some guidelines for design of inland container vessels.
Keywords:
stabilitet broda / rečni kontejnerski brod / projektovanje na osnovu rizika / procena sigurnosti / probabilistički propisi / probabilistička analiza / pomorske nesreće / nelinearno valjanje broda / haotični vetar / deterministički propisi / ship stability / safety assessment / risk-based design / probabilistic regulations / probabilistic analysis / prescriptive regulations / nonlinear rolling of ships / marine accidents / inland container vessel / gusting windSource:
2010Publisher:
- Univerzitet u Beogradu, Mašinski fakultet
Funding / projects:
- Razvoj sigurnih, efikasnih, ekoloških (SE-EKO) brodova (RS-MESTD-MPN2006-2010-14012)
URI
http://eteze.bg.ac.rs/application/showtheses?thesesId=2088https://nardus.mpn.gov.rs/handle/123456789/2326
https://fedorabg.bg.ac.rs/fedora/get/o:9884/bdef:Content/download
http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=36848911
https://machinery.mas.bg.ac.rs/handle/123456789/4
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Institution/Community
Mašinski fakultetTY - THES AU - Bačkalov, Igor PY - 2010 UR - http://eteze.bg.ac.rs/application/showtheses?thesesId=2088 UR - https://nardus.mpn.gov.rs/handle/123456789/2326 UR - https://fedorabg.bg.ac.rs/fedora/get/o:9884/bdef:Content/download UR - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=36848911 UR - https://machinery.mas.bg.ac.rs/handle/123456789/4 AB - Proračun valjanja broda na uzburkanom moru predstavlja jedan od najznačajnijih problema dinamike broda. Uobičajeno je da se problem rešava linearnom jednačinom valjanja broda na talasima, pri čemu se uticaj vetra zanemaruje, a dobijena rešenja važe samo za male uglove nakretanja. Nasuprot tome, istraživanje predstavljeno u ovom radu zasniva se na nelinearnim diferencijalnim jednačinama kretanja broda izloženog stohastičkom dejstvu neregularnih bočnih talasa i udara bočnog vetra koje simuliraju ponašanje broda u realnoj bočnoj oluji. Statističkom analizom zakona valjanja određuje se verovatnoća gubitka stabiliteta broda: prevrtanja, velikih uglova nakretanja ili naplavljivanja kroz nezaštićene otvore. Ovaj postupak nazvan je probabilistička analiza sigurnosti broda u oluji. U radu su predstavljeni matematički modeli sa jednim i sa dva stepena slobode: nezavisne nelinearne jednačine valjanja i spregnute nelinearne nezavisne jednačine valjanja i zanošenja morskih brodova izloženih dejstvu promenljivog bočnog vetra i neregularnih talasa i rečnih brodova pod dejstvom promenljivog bočnog vetra. Svaki model sadrži više izvora nelinearnosti: moment stabiliteta aproksimiran polinomom visokog stepena, nelinearno prigušenje kretanja, moment vetra. Posebna pažnja poklonjena je ispravnom modelovanju haotičnog, udarnog vetra. Probabilistička analiza može se koristiti u raznovrsnim problemima sigurnosti broda. Razvoj novih propisa o stabilitetu broda jedna je od oblasti u kojima ovaj pristup nalazi primenu. U radu je predstavljen koncept mogućih probabilističkih propisa o stabilitetu morskih i rečnih brodova. Probabilistički postupak primenjen je i u istraživanju uzroka pomorskih nesreća (nesreća broda Kugar Ejs, iz 2006. godine). Primena probabilističke analize u postupku projektovanja na osnovu rizika omogućava uvođenje inovativnih tehničkih rešenja nastalih u cilju povećane efikasnosti i sigurnosti. Definicije opsega prihvatljivih metacentarskih visina i optimalne metacentarske visine morskih brodova predstavljaju verovatno najznačajniji doprinos rada projektovanju na osnovu rizika. Osim toga, rezultati analize sigurnosti brodova unutrašnje plovidbe, dobijeni probabilističkim postupkom, iskorišćeni su kako bi se dobile neke smernice za projektovanje rečnih kontejnerskih brodova. AB - Rolling of ships in severe weather is one of the most important problems of ship dynamics, which is typically solved by using a linear differential equation of rolling; the influence of wind is neglected and the obtained solutions are valid for small roll angles only. However, the research presented in this thesis makes use of a very dissimilar approach, based on dynamics of a ship subjected to stochastic action of irregular beam waves and gusting beam wind. Acquired time history is statistically analyzed in order to assess the probability of a ship stability failure: capsize, large amplitude rolling or flooding through unsecured openings. This approach is denoted as the probabilistic analysis of ship safety. The thesis introduces following mathematical models, developed in the course of the research: nonlinear differential equations of roll and coupled nonlinear differential equations of sway and roll of seagoing ships exposed to beam waves and wind gusts and inland vessels subjected to gusting wind. Probabilistic analysis may be used in a variety of ship safety problems. The thesis introduces concepts of possible future probabilistic ship stability regulations, both for the seagoing and inland vessels. The thesis also proposes options for the improvement of the present stability regulations for inland container vessels. The probabilistic approach was used to conduct analysis of one of the most significant maritime accidents in 2006, the car carrier Cougar Ace case. The application of the probabilistic analysis in the risk-based ship design emerges as a promising technique for introduction of innovative solutions that may provide increased efficiency and safety. Probably the most significant contribution of the thesis to the field of risk-based design is the definition of the range of acceptable metacentric heights of seagoing ships. Additionally, the probabilistic analysis was used to develop some guidelines for design of inland container vessels. PB - Univerzitet u Beogradu, Mašinski fakultet T1 - Nelinearno valjanje broda pod dejstvom vetra i talasa T1 - Nonlinear rolling of ships due to wind and waves UR - https://hdl.handle.net/21.15107/rcub_nardus_2326 ER -
@phdthesis{ author = "Bačkalov, Igor", year = "2010", abstract = "Proračun valjanja broda na uzburkanom moru predstavlja jedan od najznačajnijih problema dinamike broda. Uobičajeno je da se problem rešava linearnom jednačinom valjanja broda na talasima, pri čemu se uticaj vetra zanemaruje, a dobijena rešenja važe samo za male uglove nakretanja. Nasuprot tome, istraživanje predstavljeno u ovom radu zasniva se na nelinearnim diferencijalnim jednačinama kretanja broda izloženog stohastičkom dejstvu neregularnih bočnih talasa i udara bočnog vetra koje simuliraju ponašanje broda u realnoj bočnoj oluji. Statističkom analizom zakona valjanja određuje se verovatnoća gubitka stabiliteta broda: prevrtanja, velikih uglova nakretanja ili naplavljivanja kroz nezaštićene otvore. Ovaj postupak nazvan je probabilistička analiza sigurnosti broda u oluji. U radu su predstavljeni matematički modeli sa jednim i sa dva stepena slobode: nezavisne nelinearne jednačine valjanja i spregnute nelinearne nezavisne jednačine valjanja i zanošenja morskih brodova izloženih dejstvu promenljivog bočnog vetra i neregularnih talasa i rečnih brodova pod dejstvom promenljivog bočnog vetra. Svaki model sadrži više izvora nelinearnosti: moment stabiliteta aproksimiran polinomom visokog stepena, nelinearno prigušenje kretanja, moment vetra. Posebna pažnja poklonjena je ispravnom modelovanju haotičnog, udarnog vetra. Probabilistička analiza može se koristiti u raznovrsnim problemima sigurnosti broda. Razvoj novih propisa o stabilitetu broda jedna je od oblasti u kojima ovaj pristup nalazi primenu. U radu je predstavljen koncept mogućih probabilističkih propisa o stabilitetu morskih i rečnih brodova. Probabilistički postupak primenjen je i u istraživanju uzroka pomorskih nesreća (nesreća broda Kugar Ejs, iz 2006. godine). Primena probabilističke analize u postupku projektovanja na osnovu rizika omogućava uvođenje inovativnih tehničkih rešenja nastalih u cilju povećane efikasnosti i sigurnosti. Definicije opsega prihvatljivih metacentarskih visina i optimalne metacentarske visine morskih brodova predstavljaju verovatno najznačajniji doprinos rada projektovanju na osnovu rizika. Osim toga, rezultati analize sigurnosti brodova unutrašnje plovidbe, dobijeni probabilističkim postupkom, iskorišćeni su kako bi se dobile neke smernice za projektovanje rečnih kontejnerskih brodova., Rolling of ships in severe weather is one of the most important problems of ship dynamics, which is typically solved by using a linear differential equation of rolling; the influence of wind is neglected and the obtained solutions are valid for small roll angles only. However, the research presented in this thesis makes use of a very dissimilar approach, based on dynamics of a ship subjected to stochastic action of irregular beam waves and gusting beam wind. Acquired time history is statistically analyzed in order to assess the probability of a ship stability failure: capsize, large amplitude rolling or flooding through unsecured openings. This approach is denoted as the probabilistic analysis of ship safety. The thesis introduces following mathematical models, developed in the course of the research: nonlinear differential equations of roll and coupled nonlinear differential equations of sway and roll of seagoing ships exposed to beam waves and wind gusts and inland vessels subjected to gusting wind. Probabilistic analysis may be used in a variety of ship safety problems. The thesis introduces concepts of possible future probabilistic ship stability regulations, both for the seagoing and inland vessels. The thesis also proposes options for the improvement of the present stability regulations for inland container vessels. The probabilistic approach was used to conduct analysis of one of the most significant maritime accidents in 2006, the car carrier Cougar Ace case. The application of the probabilistic analysis in the risk-based ship design emerges as a promising technique for introduction of innovative solutions that may provide increased efficiency and safety. Probably the most significant contribution of the thesis to the field of risk-based design is the definition of the range of acceptable metacentric heights of seagoing ships. Additionally, the probabilistic analysis was used to develop some guidelines for design of inland container vessels.", publisher = "Univerzitet u Beogradu, Mašinski fakultet", title = "Nelinearno valjanje broda pod dejstvom vetra i talasa, Nonlinear rolling of ships due to wind and waves", url = "https://hdl.handle.net/21.15107/rcub_nardus_2326" }
Bačkalov, I.. (2010). Nelinearno valjanje broda pod dejstvom vetra i talasa. Univerzitet u Beogradu, Mašinski fakultet.. https://hdl.handle.net/21.15107/rcub_nardus_2326
Bačkalov I. Nelinearno valjanje broda pod dejstvom vetra i talasa. 2010;. https://hdl.handle.net/21.15107/rcub_nardus_2326 .
Bačkalov, Igor, "Nelinearno valjanje broda pod dejstvom vetra i talasa" (2010), https://hdl.handle.net/21.15107/rcub_nardus_2326 .