Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Epidemiological and biomechanical evaluation of airline baggage handling

Tafazzol A., Aref S., Mardani M., Haddad O., Parnianpour M.

International Journal of Occupational Safety and Ergonomics

2016

Vol. 22, No. 2

218--227

Objectives. Musculoskeletal disorders (MSDs) are prevalent among airline baggage handlers due to manual materials handling. In this study, the Nordic musculoskeletal questionnaire (NMQ), the revised National Institute for Occupational Safety and Health (NIOSH) lifting equation, and the University of Michigan 3D Static Strength Prediction Program™ (3DSSPP) were used to analyze MSDs among baggage handlers. Methods. The NMQ was filled out by 209 baggage handlers and 46 arbitrarily selected baggage handlers were evaluated using the NIOSH method and 3DSSPP. Results. The obtained results showed that the most common MSDs occurred in the lower back region. The next risky regions included knees, neck, and upper back, respectively. The NIOSH results confirmed that the subjects lifted loads heavier than the permitted limit and their lifting postures were inappropriate. The results of the 3DSSPP also indicated that compression forces exceeded the NIOSH limit in these awkward postures. Conclusions. Relying on this study, holding compulsory ergonomic lifting training courses could be proposed for workers and regulations adjusting an upper limit for maximum baggage weight must be also enacted in order to improve occupational health and prevent the prevalence of increasing MSDs.

Finite element heat transfer and structural analysis of a eone-eylinder pressure vessel

Gorla R. S. R., Haddad O.

International Journal of Applied Mechanics and Engineering

2007

Vol. 12, no 3

599-608

Stress analysis of a cone-cylinder pressure vessel was computationaIly simulated by a finite element method and probabilisticaIly evaluated in view of several uncertainties in the performance parameters. Cumulative distribution functions and sensitivity factors were computed for overaIl heat transfer rate due to the structuraI and thermodynamic random variabIes. These results can be used to quickly identify the most critical design variabIes in order to optimize the design and make it cost effective. The analysis leads to the selection of the appropriate measurements to be used in structural and heat transfer analysis and to the identification of both the most criticaI measurements and parameters.