LS-DYNA Blast Analysis of Large Generator Housings

For more than 15 years, LS-DYNA FEA consulting services have been an integral part of Predictive Engineering. In a recent project, we investigated the blast resistance of several large generator housings. The blast pulse was determined by ConWep calculations given the TNT charges and distances from the housings.

Although LS-DYNA has several built-in methods for simulating blast loading (e.g., *LOAD_BLAST_ENHANCED and *PARTICLE_BLAST), most far-field air blast load calculations of exposed structures can be done as shown in the graphics below. Results from this investigation allowed our client to decrease the weight of their design to such an extent that analysis costs were easily recovered, and that the housings would meet all infrastructure protection requirements at the base. 

LS-DYNA Blast Analysis of Large Generator Housings 01

LS-DYNA Blast Analysis of Large Generator Housings 02

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