This paper presents the concept of structure -resistance to express relation between energy losses and the structure of a distribution system.

We should know how to choose the inner resistance of the galvanometre, the four arms of bridge and its multiplying power to meet the needs that the error of the galvanometre sensitivity caused by the inefficient sensitivtiy of the loop is less than one third of the error of the rheostat construction.

Parameter effects of the main controlled anisotropic layer on structural damping of alternately laminated damped structures;

Modal damping optimization for general damped structures;

The development history of the damping materials is retrospected and the research status of polymer,polymer composites and structure damping materials is summarized subsequently.

The structure damping is a non negative function.

Recently developed composite damping structures indicate that various damping requirements can be met through simple composition of several damping materials.

And several composite damping structures w ere introduced, and some analysis about their working mechanism were given.

We use restrained viscoelastic damping structure to reduce vibration in combination with sound absorption, insulation and suppression techniques for integrated control,and good result has been obtained in noise reduction.