【摘要】 本文采用ANSYS有限元软件建立混凝土封闭圆柱壳的声-固耦合分析模型,对封闭类混凝土壳体结构的低频噪声辐射进行模拟分析。在此基础上对封闭类混凝土壳体结构进行改良,在不影响结构承载力的前提下,在适当位置上开孔,使结构形状发生微小改变。经分析发现,该方式可有效改变此类结构的噪声频谱范围,有利于进行减噪降噪措施的设置,提高降噪效果。更多还原

【Abstract】 The fluid-structure coupled model was established by ANSYS in order to analyze the sound radiation of an enclosed cylindrical shell.On the basis of the original model,the concrete cylindrical shell structure was modified.Under the premise of not affecting structure bearing capacity,many holes were excavated on the appropriate locations to make the structure form get tiny change.Analysis results show that the frequency range of sound radiated from such structure can be changed effectively by this method.更多还原