考虑声辐射特性的结构优化设计

传统的结构动力优化设计没有考虑声辐射特性,而随着人们对环境舒适度要求的提高,降低声辐射水平成为人们越来越关心的问题。本文首先给出了用有限元方法计算结构动力响应,边界元法计算结构声辐射特性的方程,在此基础上重点建立了结构声辐射优化设计模型,同时用序列二次规划算法进行了优化求解。在JIFEX软件中实现了上述理论和算法,并通过优化设计的数值算例,进一步说明了本文的研究方法能够有效的降低结构声辐射水平。

Structural design optimization considering acoustic radiation character

The acoustic radiation character is not considered in traditionally structural dynamic design optimization.With advanced environment quality required by the people,more and more attention is paid to reducing acoustic level,so the design and control of structures considering the minimum of acoustic level is a subject of more active research.Based on the finite element method for structural dynamical equation and boundary element method for acoustic equation,the acoustic radiation optimization model built in this paper is solved with sequential quadratic programming.The above theory and algorithm is carried on JIFEX system.Numerical results show that acoustic radiation could be reduced effectively using the method presented in this paper.