分别采用直接法和模态叠加法，计算声场-结构耦合系统的声压响应水平及其敏度。
The modal frequency response and its sensitivity analysis for the coupled system using the direct method and the eigenmodes.
对于转子系统非线性动力学问题，直接积分法比模态叠加法更为有效。
With regard to the nonlinear kinetics problems of a rotor system the direct integration method is more effective than the modality superposition method.
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