| High elastic coupling is a common shaft connecting parts and has better damping performance, displacement compensation performance, etc., which are widely used in shipbuilding and other fields. High elastic coupling of rubber components is one of the important components and its performance for the coupling operation has a great influence.People mainly concentrate on the torsional stiffness and axial stiffnessof rubber elastic element while the research of dynamic radial stiffness remains a great deal to work out. Dynamic radial stiffness of rubber components is one of important parameters of vibration analysis. Therefore, this thesis is chiefly focus on the effect factors and calculation method of the dynamic radial stiffness.The dynamic radial stiffness of the rubber element of high flexible coupling is mainly related to the frequency and amplitude of vibration. When these experimental data are analyzed carefully, we can obtain the influence of the amplitude could be negligible in the case of small amplitude. Thus, when westudy the method to calculate dynamic radial stiffness of the rubber element of high flexible coupling, small amplitude and large amplitude must be considered individually. Based on the dynamic and static test data, the model parameters of rubber can be optimized by joint simulation of ISIGHT and ABAQUS and use this model to predict the radial stiffness under different frequency and amplitude.By the Instron8802 dynamic testing machine owned by research institution 711,the writer obtains the dynamic and static radial stiffness of rubber element of LSR1410 and LSR1610 under a certain amplitude and frequency. Compared the test results and the predicted results, the error islower than15%, proving the simulation method is reliable. In the later work, we can take advantage of the method of dynamic radial stiffness of rubber components to predict dynamic radial stiffness of new products, so as to guide the design and development of high flexible coupling. |
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