RECOMMENDED FINITE ELEMENT FORMULATIONS FOR THE ANALYSIS OF OFFSHORE BLAST WALLS IN AN EXPLOSION

Authors

  • DO KYUN KIM OCEAN AND SHIP TECHNOLOGY RESEARCH GROUP (DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING), UNIVERSITI TEKNOLOGI PETRONAS, 32610 SERI ISKANDAR, PERAK, MALAYSIA / GRADUATE INSTITUTE OF FERROUS TECHNOLOGY, POS-TECH, 37673 POHANG, KOREA
  • WILLIAM NG OCEAN AND SHIP TECHNOLOGY RESEARCH GROUP (DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING), UNIVERSITI TEKNOLOGI PETRONAS, 32610 SERI ISKANDAR, PERAK, MALAYSIA
  • HWANG O. J. MCDERMOTT ASIA PACIFIC, 50250 KUALA LUMPUR, MALAYSIA
  • SOHN J. M. DEPARTMENT OF NAVAL ARCHITECTURE & MARINE SYSTEM ENGINEERING, PUKYONG NATIONAL UNIVERSITY, 48513 BUSAN, KOREA

Abstract

THIS STUDY SUGGESTS RELEVANT FINITE ELEMENT (FE) FORMULATIONS FOR THE STRUCTURAL ANALYSIS OF OFFSHORE BLAST WALLS SUBJECTED TO BLAST LOADINGS DUE TO HYDROCARBON EXPLOSIONS. THE PRESENT BLAST WALL MODEL ADOPT-ED FROM HSE (2003) CONSISTS OF A CORRUGATED PANEL AND SUPPORTING MEMBERS, AND WAS MODELLED WITH SHELL, THICK-SHELL, AND SOLID ELE-MENT COMBINATIONS IN LS-DYNA, AN EXPLICIT FINITE ELEMENT ANALYSIS (FEA) SOLVER. STAINLESS AND MILD STEELS WERE EMPLOYED AS MATERIALS FOR THE BLAST WALL MODEL, WITH CONSIDERATION OF STRAIN RATE EFFECT THROUGHOUT TEN (10) PULSE PRESSURE LOAD REGIMES. THE OBTAINED FEA RESULTS WERE VALIDATED BY EXPERIMENTAL DATA FROM HSE (2003) WITH DECENT AGREEMENT. IN THE PRESENT STUDY, RECOMMENDED FE FORMULA-TIONS WITH ADDITIONAL HOURGLASS CONTROL FUNCTIONS WERE WIDELY DIS-CUSSED FROM THE PERSPECTIVES OF SOLUTION ACCURACY AND COMPUTATIONAL COST BASED ON A STATISTICAL APPROACH. THE OBTAINED OUTCOMES COULD BE USED FOR THE STRUCTURAL ANALYSIS AND DESIGN OF OFFSHORE BLAST WALLS IN THE ESTIMATIONS OF MAXIMUM AND PERMANENT DEFORMATIONS UNDER BLAST LOADINGS.

Published

2018-08-17

Issue

Section

Articles