The development of hybrid ES-FE-SEA method for mid-frequency vibration analysis of complex built-up structure

Wu, Fei; Chen, Yongji; Yao, Lingyun; Hu, M.

doi:10.1016/j.apm.2018.07.033

Cited by 13 publications

(3 citation statements)

References 28 publications

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“…Considering the advantage of the boundary element (BE) method in the area of acoustics, Gao developed a hybrid BE-SEA formulation which reduces the number of degrees of freedom (DoFs) compared to the FE-SEA [28]. Wu introduced an embedding of the gradient smoothing technique to the FE-SEA framework, which leads to much more accurate results in numerical cases [29]. Clot proposed a hybrid FE-SEA-experimental model in which some of the structural parameters are determined by experimental data [30,31].…”

Section: Introductionmentioning

confidence: 99%

A hybrid meshless–statistical energy analysis method for complex structure vibration analysis

2022

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A new hybrid deterministic–statistical energy analysis (SEA) formulation is presented by introducing a meshless method for modeling the deterministic components. Moving least square Ritz (MLSR) meshless method is applied, in which MLS is used to build the discrete model and the Ritz method allows to obtain variational formulation of the deterministic components of the governing equations. Such governing equations can be formulated via boundary conditions by penalty method and Lagrange multipliers. The hybrid model by penalty method keeps a similar formulation with the framework of the finite element SEA, while the model by the latter increases the size of the dynamic stiffness matrix and the expanded components are determined by the constraints. For validation purpose, three case studies are provided, including beam–coupled plates and plate–coupled plates built-up structure. The results by the hybrid MLSR-SEA model are compared with those by FE-SEA and Monte Carlo simulation. Good agreements of responses between the methods demonstrate the reliability of the MLSR-SEA formulation.

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Section: Introductionmentioning

confidence: 99%

A hybrid meshless–statistical energy analysis method for complex structure vibration analysis

2022

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“…The structural noise response of aircraft model under acoustic vibration coupling was studied by the hybrid FE-SEA method. In addition, some other papers have applied the hybrid FE-SEA method to different structures and problems [21,22]. At present, the hybrid FE-SEA method is mainly used to solve the problem of steady-state response.…”

Section: Introductionmentioning

confidence: 99%

The Shock Response Prediction of Spacecraft Structure Based on Hybrid FE-SEA Method

et al. 2021

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An improved method based on the Hybrid Finite Element-Statistical Energy Analysis (FE-SEA) method and quasi-steady state theory is proposed to predict the response of spacecraft structure during the process of pyrotechnics separation. Firstly, the amplitude–frequency value of shock load is obtained by using time-frequency conversion technology. Then, according to the frequency response characteristics of each part of the spacecraft structure, a more accurate hybrid FE-SEA model is established. The piecewise loading method is used to predict the response of the hybrid model. Finally, the time domain response results are reconstructed, and the shock response spectrum (SRS) is calculated. Based on the test system of simulating pyroshock, the shock experiment of spacecraft structure is conducted. The high frequency and high velocity character of pyroshock could be effectively simulated, and an accurate shock force function could be obtained through the experiment. This indicates that the numerical results are in line with the ones of the experiment. The SRS obtained from experiments and calculations have similar trends and amplitudes. This conclusion verifies the rationality and sufficient accuracy of the novel method in this paper. The novel method presented in this paper greatly improves the computational efficiency. At the same time, it provides theoretical guidance for shock response prediction of spacecraft structure by steady-state methods.

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“…(1) Deterministic analysis methods: This method is suitable for low-frequency to mid-frequency STL analysis, and the commonly used methods are finite element analysis (FEA) and boundary element method (BEM) [19][20][21][22] etc. Moreover, highorder adaptive method, 23 stability method 24 and multi-scale method 25 etc., are all included to the deterministic methods.…”

Section: Introductionmentioning

confidence: 99%

Sound Transmission Loss of a Metal Panel With Rib Reinforcements and Pasted Damping

Xie¹,

Yuan²,

Shangguan³

2020

The International Journal of Acoustics and Vibration

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The sound transmission losses (STL) of a metal panel with rib reinforcement (MPRR) are studied by both an experimental method and a simulation approach. The experimental method and data processing technique for obtaining STL are presented. Six MPRRs with different number of rib reinforcement and different geometry size of rib reinforcement, and six MPRRs with different type of the pasted damping material are designed and anufactured, and their STL performances are investigated by experimental method. The calculation model for STL of a MPRR is proposed and the calculated STL are compared favorably with the experimental data, which validates the proposed model. The analytical methods and conclusions are instructive for the design and the tuning of STL of MPRRs.

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The development of hybrid ES-FE-SEA method for mid-frequency vibration analysis of complex built-up structure

Cited by 13 publications

References 28 publications

A hybrid meshless–statistical energy analysis method for complex structure vibration analysis

A hybrid meshless–statistical energy analysis method for complex structure vibration analysis

The Shock Response Prediction of Spacecraft Structure Based on Hybrid FE-SEA Method

Sound Transmission Loss of a Metal Panel With Rib Reinforcements and Pasted Damping

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