Distinguishing Mechanical Vibration

In regards to the subject of this book, when referring to mechanical systems we are implying systems such as compressors, pumps and other machines. When referring to structures we are implying buildings, space craft and other large scale objects. A most intuitive differential is simply that mechanical systems are ones that we use, whereas a structural system is one that we can physically enter. Although there are clearly many cases where a studied system can be categorized as both, this book will mainly focus on the more mechanical aspects of vibration; but most of the beginning conceptual formations are identical. I also want to note that there are similarities between vibrational theorems and analysis and acoustical; initially viewed as separate but they overlap considerably within some mathematical and conceptual subject.