摘要
油底壳、油箱、膨胀水箱等汽车储液容器在设计开发中,结构模态作为关键技术指标,其精确的计算需要考虑液体与结构的双向耦合作用。本文以圆柱形储液容器为研究对象,采用声学单元、薄膜单元、弹簧单元及壳单元建立了可以考虑液体质量、可压缩性和液面晃动的耦合模态计算模型。然后,计算储液容器不同液体高度下的一阶模态频率,与模态试验、虚拟质量法及液体单元法的结果对比显示,本文所采用的建模方法具有更高的准确性。最后,探究了容器厚度、直径及高度对不同液体高度的储液容器的前两阶模态的影响规律,为此类储液容器的设计提供参考。
In order to precisely calculate the structure modal,as a key technical index,of automotive fluid-filled container,such as oil pan,fuel tank and expansion tank,in the design and development,the fluid-structure interaction(FSI)is necessary to be considered.As the research object,a coupling-modal calculation model is built based on acoustic element,membrane element,spring element and shell element.This model considers mass effect,compressibility and sloshing effect of liquid.Then,the first-order mode under different liquid height is calculated with the modeling method.It is proved that the modeling method has a higher accuracy by comparing the result of calculation with modal test,fluid element method and virtual mass method.Finally,the effect of the thickness,diameter and height on the first and second order modes of the container are investigated,which can provides guidance for the design of this kind of container.
作者
孙长周
黄佳佳
周琴平
Sun Changzhou;Huang Jiajia;Zhou Qinping(Shanghai Kingfa Sci.&Tech.Co.,Ltd.,201714,Shanghai,China)
出处
《应用力学学报》
CAS
CSCD
北大核心
2021年第5期2079-2083,共5页
Chinese Journal of Applied Mechanics
关键词
汽车储液容器
动力学建模
晃动效应
流固耦合模态
结构设计
automotive fluid-filled container
dynamics modeling
sloshing effect
fluid-structure interaction modal
structure design
