Study On Dynamic Performance Testing Equipment Of Highly Flexible Couplings

Highly flexible couplings are the key parts of vibration and noise reduction in ship power system, and the dynamic performances of the couplings are related directly to their vibration control properties. Based on a cooperation program Study on Dynamic Performance of Highly Flexible Couplings with one research institute of China Shipbuilding Industry Corporation, a study on appropriative testing equipment utilized to test the dynamic performances of highly flexible couplings has been completed.The dynamic performances testing equipment of highly flexible couplings is one kind of displacement type torsional vibration testing equipment with the function of applying alternating torque to the highly flexible couplings. Study and design of the testing equipment have been conducted as follows:Firstly, the general scheme of the testing equipment has been designed by contrasting the existent torsional vibration testing equipment. According to the scheme, an optimization program based on random direction method has been designed, and an optimization simulation model based on ADAMS has been built. The dimension synthesis of the torque excitation mechanism which is the core of the testing equipment has been carried out with these optimization methods, and the optimum dimension of the torque excitation mechanism has been achieved.Secondly, the structure of the testing equipment has been designed according to the maximum static load. Structure topology optimization of the key load bearing parts together with the fatigue strength assessment of the key alternating load bearing parts have been performed, and the structure modification has been conducted with the result of the topology optimization and the fatigue strength assessment. Finally, according to the result of the structure design, kinetic and dynamic analysis of the testing equipment has been conducted with closed loop vector method and simultaneous constraint method, and the dynamic loads of the key parts have been attained. Finite element analysis of the key parts has been conducted according to the maximum dynamic loads. The stress and deformation status of the key parts have been obtained and the methods of local structure refinement have been propounded.The dynamic performance testing equipment of highly flexible couplings has been in operation. It is shown that the testing equipment has achieved scheduled function for dynamic performance test, and all the testing dates are exact and valid.