Hi!
The local utility's engineering standard for power transformers states that the vertical component of a seismic acceleration be combined with one horizontal component (pretty obvious) Is this vertical component either upwards OR downwards? Is the resultant always further combined with the...
Machinery's Handbook, Roark's Formulas for Stress and Strain, etc. All these books help to find strengths, moments and frequencies of simple-ish beams. But what about support structures with braces and cross-bars? What's the procedure for determining the Natural Frequency of an assembly that's...
