ABSTRACT
The vibration control of structures to minimise their noise radiation was discussed in Chapters 8 and 9, and the control of global structural vibration levels will be discussed in Chapter 11. In this chapter, the control of vibration transmission along structural elements is discussed. Such control may be for the purpose of reducing the sound radiated from another structure attached to the structural element, or it may be for the purpose of reducing vibration levels in an attached structure. Examples of the former case include the control of vibration transmission along a strut connecting the gearbox to the cabin in a helicopter (Sutton, 1997) or the control of vibratory energy transmitted along a submarine hull excited by the propeller pressure field. An example of the latter case is the control of vibratory power transmitted along a support arm to a space telescope.
