有限域液体附加质量对板结构振动特性的影响

基于附加质量法、公式估算法以及流固耦合有限元方法对有限域流体与结构耦合振动特性进行计算分析,以方箱底板单面接触有限域的液体,以及双面分别接触有限域液体和无限域液体工况为例,通过一系列计算得出工程中处理附连水质量影响的一般方法和经验。给出处理有限流体域问题时附加质量法的一般适用准则,即当浸水参数h/b0.1时,利用附加质量法具有足够的工程计算精度,而当h/b>0.1时,建议采用流固耦合方法进行计算。

Effects of Added Mass Caused by Finite Domain Liquid on Plate Structure Vibration

Using three methods,i.e.added mass method,formula estimate method and fluid-structure in teraction method,we calculated vibration frequency of plate structure immersed in finite domain water.In the case of box-shaped structure,different fluid coupling conditions were investigated,and rules of deal ing with the effects of added water mass on the plate structure were derived.The criteria for practical calcu lation were also presented as guide to use added mass method when tackle these problems,i.e.sufficient accuracy will be obtained using added mass method when the rate of immersion depth versus plate width is less than 0.1,otherwise fluid-structure interaction method is recommended.