Substructure method for structure modification based upon unit volume energy analysis technique

摘要

This paper is engaged in identifying weak substructures of a vibration system and modifying the parameters of the system using analysis technique of unit volume energy. For any main vibration mode of a system, defining the substructures with large unit volume energy as weak substructures, the modification method of physical parameters of the system is presented. Along with it, the analysis method of unit volume energy for virtual substructures is presented, which is used for structure configuration modification. The analysis technique presented in this paper is used directly to modify physical parameters of the weak substructures. The practical application of the method shows that it is simple and efficient, which avoids complex sensitivity analysis in common methods of structure modification or optimization design.