In this thesis, a method of reducing the shock response of the 1DOF(degree of freedom) system on the double beam structure is proposed. The double beam structure represents main structure which occupies most part of the system, and 1DOF system is defined as the additional structures on the main structure. For example of HDD(hard disk drive), the main structure is HDD base structure and additional structures are consisted of disk and head suspension assembly. Background of simplified modeling is a geometrically complex structure like a HDD ,which is applied by a numerical method, e.g., finite element method, to analyze the vibration characteristic of system, and it is systematically hard to design the isolator by the numerical method which is trial and error in initial design step.
In case there is an external shock applied to the system, which is composed of main structure and additional structures like a hard disk drive, the impact force can induce the damage of additional structure on the main structure. In order to reduce the shock response of additional structure, the shock transfer path from the impact part to the points of interest is changed by inserting the isolator into the main structure. This concept is applied to the double beam structure.
Performance index of damage between additional structures is the maximum acceleration of 1DOF system on the double beam structure. Through analyzing the parameteric study of the design parameters which effect vibrational characteristic of system, it is discussed to improve the design of the isolator to reduce the maximum acceleration of 1DOF system.
