Modal analysis of the Nigerian church space frame Project. Modal analysis, also known as
dynamic characteristic analysis, is a modern method for studying structural dynamic characteristics. The free mode is an intrinsic property of structural free vibration, only
related to the structure itself, and has nothing to do with external excitation. The actual
structural vibration is vibrated by its modal array vibration or by its superposition of
several or more orders. Through free modal analysis, the dynamic characteristics of the
structure (ie, the state of the various components of the structure during vibration, etc.)
can be determined, and fault diagnosis and optimization can be performed accordingly.