摘要
针对薄壁贮箱的流固耦合问题,在理论分析基础上,采用有限元数值方法进行贮箱在充液不加压和充液加压两种工况下的模态分析,得到流固耦合下贮箱的含阻尼非线性固有频率等动力学参数。最终,总结和分析流固耦合动力学分析结果,给出了贮箱在设计和使用过程中需要关注的两点:一是振型基本均为呼吸状,二是流体的密度、声速会影响流固耦合模型的模态频率。
To solve the fluid-structure coupling problem of the thin wall tanks,a finite element numericalapproach was adopted on the basis of theoretical analysis.Modal analysis was conducted forthe non-pressurized and pressurized tanks with filling liquids and the dynamic parameters of the nonlinearnormal natural frequency with damping were obtained.Then,the fluid-structure coupling dynamicsimulation results were summed up and analyzed.The factors worthy of paying attention to inthe process of designing and using the tanks were given such as the vibration modes of the tank werebasically the breathing style,and the density and sound speed of the fluid would affect the modalfrequency of the fluid-structure coupling model.
作者
姚灿
朱洪来
林星荣
YAO Can;ZHU Honglai;LIN Xingrong(Beijing Institute of Control Engineering, Beijing 100094, China;Beijing Engineering Research Center of Efficient and Green Aerospace Propulsion Technology, Beijing 100094, China)
出处
《载人航天》
CSCD
2017年第6期751-754,共4页
Manned Spaceflight
关键词
贮箱
流固耦合
动力学
固有频率
tank
fluid-structure coupling
dynamics
natural frequency
