Dynamic characteristics of a WPC—comparison of transfer matrix method and FE method

Abstract

To find the difference in dynamic characteristics between conventional monohull ship and wave penetrating catamaran (WPC), a WPC was taken as an object; its dynamic characteristics were computed by transfer matrix method and finite element method respectively. According to the comparison of the nature frequency results and mode shape results, the fact that FEM method is more suitable to dynamic characteristics analysis of a WPC was pointed out, special features on dynamic characteristics of WPC were given, and some beneficial suggestions are proposed to optimize the strength of a WPC in design period.

Keywords

Wave penetrating catamaran / Dynamic characteristics / Transfer matrix method / FEM

References

[1] SIKORA J P. A method for estimating lifetime loads and fatigue lives for SWATH and conventional monohull ships [J]. Naval Engineering Journal, 1983(3): 63–84.

[2] TANG Youg-ang, PAN Yong-hao, DU Ji-jun. Application of transfer matrix method for analyzing torsion-bending coupled vibration of ship hull [J]. Ship building of China, 1995(2):60–67 (in Chinese).

[3] BISHOP R E D, PRICE W G, TEMAREL P. Anti-symmetric vibration of ship hulls [J]. The Royal Institution of Naval Architects, 1979(121):197–208.

[4] YUN Wei-jun. Prediction of ship vibration [M]. Ocean Publisher House, 1985.

[5] Basic MSC/NASTRAN linear static and normal modes analysis [M]. Los Angeles: The MacNeal-Schwendler Corporation, 1994.

[6] Basic dynamic analysis user’s guid [M]. Los Angeles: The MacNeal-Schwendler Corporation, 1994.

[7] Tomson W T. Theory of vibration and its application [M]. 1985, Harbin: Harbin Shipbuilding Engineering Institute press, (in Chinese)