Abstract
Due to the difficulty of obtaining statistical energy parameters of complex structures and the complexity of modeling connection and model verification, the hybrid FE-SEA model has many problems in modeling complex structures. Therefore, in order to solve the above problems, this paper provides a reference for the application of the hybrid FE-SEA model in complex structures. In this paper, the hybrid FE-SEA commercial vehicle model is established by an experimental statistical energy parameter modeling method and a modification method. The model division and subsystem connection modeling of a complex substructure of a heavy vehicle cab are studied. In the hybrid model, the hybrid line connection and the hybrid point connection are established. On this basis, the parameters of the cab model were studied, and the statistical energy parameters such as modal density, internal loss factor, and coupling loss factor were obtained by the experimental method. The statistical energy parameters of the cab acoustic model are modified. Finally, the accuracy of the model is verified by vehicle test. In addition, the acoustic performance of the cab was optimized, and airtightness and acoustic packaging were verified. The full parameter modeling and correction method is adopted in this paper, which is an effective supplement to the traditional statistical energy parameter modeling method.
Highlights
In the late 1990s, Langley and Bremner proposed a hybrid statistical energy model (FE-SEA) combined with the finite element method [1]
This is because it involves the conversion of two noise calculation methods in the whole calculation process [2]. Important parameters such as transfer loss, vibration energy, and sound energy are obtained by the traditional finite element method, and the traditional statistical energy analysis method and hybrid method are compared and analyzed
According to the commercial vehicle cab CAD model for the hybrid FE-SEA model, the first subsystem division is comprised of many parts: the bridge model has a bridge metal frame, beam, high rigidity structure that is divided into FE subsystems, such as sheet metal pieces that are less than 1 mm thick
Summary
In the late 1990s, Langley and Bremner proposed a hybrid statistical energy model (FE-SEA) combined with the finite element method [1]. The boundary region connection form of finite element subsystem and statistical energy subsystem is the key to the successful application of this hybrid method in the engineering field This is because it involves the conversion of two noise calculation methods in the whole calculation process [2]. The coupling loss factor, modal density, internal loss factor, and other parameters in complex structures need to be obtained and modified by means of an experimental statistical energy method. The experimental statistical energy parameter method of the hybrid FE-SEA model is studied in this paper. The full parameter modeling method is adopted to study on the basis of experimental correction It is an effective supplement and extension to the existing statistical parameter modeling method. Compared with the existing theoretical parameter estimation methods, the calculation accuracy is higher
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