Structural  Consequence Modelling

Structural response of explosion loads

In the event of a explosion, severe blast loads may be experienced that can cause serious structural damage to load-bearing members, ultimately leading to the collapse of the structure. Accordingly, it is important to assess the ability of a facility to withstand these loads. CFD is used to predict the drag loads or explosion overpressures, and this data then is utilized in a structural analysis using FEA to predict the deformation, fragmentation and time-to-failure of the structure when exposed to blast loads.

Structural response of fire loads

Pressurised gas releases may result in jet fires if immediately ignited, whereas pool fires may occur in the event of a liquid hydrocarbon release that is sufficiently large in size. For either of these scenarios, the heat generated may be high enough to cause significant damage to adjacent equipment and structural members. Heat loads and thermal fluxes are predicted using CFD, with these results being used as boundary conditions in a structural analysis to predict the response of a given structure when exposed to jet or pool fires.

Explosion impact analysis on critical facilities

Simulating the structural response and/or failure due to an explosion involves fluid-structure interaction modelling of highly non-linear dynamics. The effect of high pressure shock waves with short-duration impulses is analysed in great detail, allowing customized explosion impact analysis to achieve safer and practical designs.

Fire impact analysis on critical facilities

BMT WBM provides fire load response assessments for the safety critical elements including pressurized vessels, flare drums and piping. These elements when exposed to high thermal loads may result in severe damage, loss of containment and produce further escalation. Predicting the dynamic response when exposed to severe thermal loads is a challenging exercise, and specialist software is used to tackle such problems taking into account the emergency response philosophy of the system (i.e. isolation, blowdown).