Analiza čvrstoće konstrukcije riječne barže u slučaju nasukavanja

undergraduate thesis

• Title (english): Analysis of the structural strength of a river barge in case of grounding
• Author: Ivan Marić
• Mentor: Smiljko Rudan (mentor)
• Committee member: Ivan Ćatipović (predsjednik povjerenstva)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2023-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Shipbuilding; Constructive of Floating and Maritime Structures

Abstract

Plovidba unutrašnjim vodama još uvijek je jedan od glavnih načina prijevoza tereta, prvenstveno zbog ekonomičnosti transporta tereta, ali i zbog količine tereta koja se može prevesti. U riječnom prometu, kao i u svakoj drugoj vrsti prometa, dolazi do nesreća i raznih kritičnih situacija koje otežavaju ili onemogućuju plovidbu. Neke od tih poteškoća su sudari, nasukavanje, vremenske nepogode, razina vode kojom se plovi, i tako dalje. Riječna plovila mogu se podijeliti prema sredstvu kojeg prevoze ili po načinu plovidbe. Tako dolazimo do barže, ili potiskivača, koja služi isključivo za prijevoz tereta, a najveća prednost joj je mogućnost plovidbe po vodama niskog vodostaja. U ovom radu provedena je strukturna analiza barže u slučajevima nasukavanja, što može puno utjecati na poboljšanje sigurnosnih standarda i smanjenje rizika od ozbiljnih nesreća. Provele su se dvije analize za različite načine nasukavanja koje, u ovisnosti o rubnim uvjetima i zadanim opterećenjima, pokazuju drugačije rezultate. Za modeliranje konstrukcije barže i proračun konstrukcije koristi se programski paket Femap/ NX Nastran. U prvoj analizi provela se strukturna analiza kada se barža nakon nasukavanja u potpunosti nalazi iznad razine mora. Konstrukcija se nakon ove analize pokazala zadovoljavajuća te za nju nisu potrebna neka poboljšanja geometrije modela. U drugoj analizi provedena je strukturna analiza kada je krmeni dio barže nakon nasukavanja djelomično ispod razine vode. Rezultati analize pokazali su prevelik iznos naprezanja u određenim dijelovima konstrukcije koji zahtijevaju poboljšavanje geometrije modela tako da se određeni elementi dodatno ojačaju.

Abstract (english)

Navigation on inland waters is still one of the primary means of cargo transportation, primarily due to the cost-effectiveness of cargo transport and the volume of cargo that can be transported. In river transportation, as in any other mode of transportation, accidents and various critical situations occur, which hinder or prevent navigation. Some of these difficulties include collisions, grounding, adverse weather conditions, water levels, and so on. River vessels can be classified based on the cargo they transport or the method of navigation. This leads to the classification of barges or pushboats, which are exclusively used for transporting cargo, with a significant advantage being their ability to navigate in low water conditions. This paper presents a structural analysis of a barge in cases of grounding, which can significantly impact the improvement of safety standards and the reduction of the risk of serious accidents. Two analyses were conducted for different grounding scenarios, showing varying results depending on boundary conditions and specified loads. The Femap/NX Nastran software package was used for modeling the barge's construction and structural calculations. In the first analysis, a structural analysis was conducted when the barge is fully above sea level after grounding. The construction was found to be satisfactory in this analysis, and no geometry model improvements were required. In the second analysis, a structural analysis was performed when the stern of the barge is partially submerged below the water level after grounding. The results of the analysis indicated excessive stress levels in certain parts of the structure, necessitating geometry model enhancements to reinforce specific elements.

• Keywords: Riječna plovidba; barža; nasukavanje; strukturna analiza; Femap
• Keywords (english): River navigation; barge; grounding; structural analysis; Femap
• Language: croatian
• URN:NBN: urn:nbn:hr:235:938149
• Study programme: Title: Naval Architecture; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka brodogradnje (sveučilišni prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka brodogradnje)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-09-27 17:49:32