Improving the Far-field Errors for Load Identification Based on Virtual Far-field Exciting Method

doi:10.3901/JME.2016.01.116

Abstract

Abstract: The load identification method is a commonly method for the vibration response reverse solving in engineering vibration and noise testing and analyze. However, due to the load identification method cannot be well to consider the complexity damping characteristics of the system when the method is carry out, the errors in the far-field away from the excitation point field is very large, so the load identification method is facing the widely challenges. A virtual far-field excitation method is proposed, in which the virtual excitation point is arranged farther away from the excitation point position of the far-field to carry out the load identification solving. It can avoid the solver error caused by the distance between the excitation point and response points. After comparing with the experimental test data and the results solved by load identification method, suggests that the results solved by virtual far-field exciting method are more closely with the test data, particularly in the far field, the errors have been significantly improved. This indicates that the virtual far-field excitation method can effectively improve the solving the error in the far field of the traditional load identification method, and can be widely used to solve the vibration of complex mechanical system, in which the load excitation is difficult to determine.

Key words: complex mechanical systems, far-field errors, gerotor, load identification method, virtual far-field exciting

CLC Number:

TB532

MA Fuyin, WU Jiuhui, WU Weiwei. Improving the Far-field Errors for Load Identification Based on Virtual Far-field Exciting Method[J]. Journal of Mechanical Engineering, 2016, 52(1): 116-122.

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