Research On Vibration Transfer Characteristics Of Cabin Typical Mechanical Structure

To achieve submarine antivibration noise reduction is vital for improving its combat ability. Mechanical vibration noise (or structural noise) caused by power device vibration is the main source of submarine underwater radiation noise. Research transfer characteristics of power device vibration along submarine mechanical structure have been the hotspot of engineering. Regard this as the background; the article carries out a research work on vibration transfer characteristics of cabin typical mechanical structure, law characteristics are given, and to verify the analysis. The conclusions have important significance for vibration and noise control of submarine. The main contents are as follows:From the definition of mechanical admittance, the dynamics simplified model for cabin typical mechanical structure is established by using the equivalent admittance. By the integrated use of substructure admittance synthesis method and four terminals transfer matrix method, the transfer function expression of each substructure is calculated; the general theory and method of studying vibration transmission characteristics of mechanical structure is given.Numerical simulation of vibration transfer function of cabin typical mechanical structure model is done by using MATLAB software; the influence of structural characteristic parameters on vibration transfer characteristics is systemically studied; the general discipline of vibration transfer is systemically summarized.The FEM (Finite Element Method) model for cabin typical mechanical structure is established by using ANSYS finite element analysis software; modal simulation analysis and harmonic response simulation analysis are carried out; vibration transfer discipline of cabin typical mechanical structure is obtained. Comparing it with MATLAB simulation results to verify correctness of the theoretical model.