摘要
油底壳、油箱、膨胀水箱等在塑料应用开发中,为了准确计算其模态,需要考虑液体与结构的耦合作用。文章以圆柱形储液容器为研究对象,采用声学单元、薄膜单元对流体进行建模,考虑了液体可压缩性和自由液面的晃动效应,计算得到容器的一阶模态,与模态试验结果、液体单元法和虚拟质量法的耦合模态计算结果对比显示,文章所采用的建模方法在计算流固耦合模态时具有更高的准确性。然后,采用该建模方法探究了液体高度对该圆柱形储液容器前三阶模态的影响。最后,采用该建模方法计算了某款塑料油底壳在含油状态下的一阶模态,并与油底壳单独模态和虚拟质量法的计算结果作对比,说明了考虑液体作用及液面晃动效应对油底壳模态计算的重要性。
In order to precisely calculate the modal of oil pan,fuel tank and expansion tank in the development of plastic application,the fluid-structure interaction(FSI)is necessary to be considered.The study model based on acoustic element and membrane element consider compressibility and sloshing effect of liquid.It is proved that the modeling method has a higher accuracy by comparing the result of calculation of first-order mode with modal test,fluid element method and virtual mass method.Then,the effect of fluid height to first three mode is studied.Finally,the modeling method is used for calculating the first-order mode of a plastic oil pan.The results show that it is necessary to consider liquid effect and sloshing in the modal calculation of liquid storage container by comparing with the calculation results of single structure modal and virtual mass method.
作者
孙长周
杨良波
Sun Chanzhou;Yang Liangbo(Shanghai Kingfa Sci.&Tech.Co.,Ltd.,Shanghai 201714;Kingfa Sci.&Tech.Co.,Ltd.,Guangdong Guangzhou 510663)
出处
《汽车实用技术》
2020年第7期102-106,共5页
Automobile Applied Technology
关键词
塑料应用
储液容器
流固耦合模态
晃动效应
塑料油底壳
Plastic application
Liquid storage container
Fluid-structure interaction modal
Sloshing effect
Plastic oil pan
