A simulation analysis method based on frequency division is proposed. Simulation analysis of the sound insulation for complex panels is done by using this method. The accurate simulation results of sound simulation for the complex panels are obtained. In the intermediate frequency region, considering the boundary condition and loss factor, the FEM method is used for the simulation analysis. While in the low frequency region below the first-order natural frequency, which is the stiffness control region, the equivalent method is adopted for the simulation. To raise the computational efficiency in the high frequency region, the SEA method is applied. The simulation results of the overall sound insulation in the whole frequency range are all in good agreement with the experimental results, which verifies the validity of the frequency division method.%针对波纹板、加筋板等复杂结构的隔声量仿真分析,提出一种分频段的仿真分析方法,获得复杂板件较为准确的隔声量仿真结果.在中频区域,采用考虑边界条件及阻尼损耗因子的有限元法对复杂板件进行仿真分析;而对一阶频率之前的低频区域,即刚度控制区域,采用等效法进行复杂板件的仿真分析;为了提高高频区域的计算效率,对其采用统计能量法计算隔声量.全频段的综合隔声量仿真结果与实验结果非常吻合,验证分频段仿真方法的有效性.
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