PSI - Issue 8

Alessandro Grassi et al. / Procedia Structural Integrity 8 (2018) 594–603 Grassi et al.,/ Structural Integrity Procedia 00 (2017) 000 – 000

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of transportation and operating conditions of the structures here presented; therefore, some tests have been implemented using reduced load. In any case, restraint and lifting test have been considered since such cases are typical of plant transportation and installation. Other approaches are based on the direct measurement of stress under motion of the mechanical system (Cianetti et al., 2017), but are not applicable in this design phase due to lack of such information for the prototype. Certainly, further investigation on the plant should be carried out starting from data acquired on the prototype plant itself, including both data related to accelerations during transport and during plant operation, which includes machines generating shocks and vibrations such as shredders and vibrating screens. Finally, the load cases considered for the analysis according to adapted ISO 1496 – 1 are shown in Table 2.

Table 2. Elements installed on the containers. Note: R is the mass loaded on the container; T is the tare masse of the container itself.

Notes for application on the presented system

Load Case

Loads according to ISO 1496 – 1

Stacking

942 kN load: removed

Lifting from top corner fitting

Loads applied on upper fittings

Loads applied on forklift pockets (existing in the model)

Lifting from forklift pockets

Rigidity – transverse

Rigidity – longitudinal

Restraint test

4. Results According to ISO 1496 – 1, u pon completion of the test, the structure shall show neither permanent deformation which will render it unsuitable for use nor abnormality which will render it unsuitable for use, and the dimensional requirements affecting handling, securing and interchange shall be satisfied . Therefore, the main target of the analysis is to verify that stresses are within acceptable limits for the used materials and