摘要
为了获得指定罐体形状和充液比条件下的钟摆模型参数值,采用类比分析方法推导了钟摆摆线长度参数和液体冲击频率的关系;采用假设和类比分析相结合的方法推导了钟摆小球质量参数和液体冲击力的关系.在此基础上,借助不同仿真条件下的液体自由振荡FLUENT软件仿真结果拟合得到钟摆模型参数关于罐体形状和充液比的多项式函数.FLUENT仿真和钟摆模型数值计算获得的液体冲击力绕罐体上某点的力矩表明:本文提出的方法能够获得精确的钟摆模型参数值,模型参数的拟合值与实际值的误差均在±4%范围内.
To obtain the pendulum parameter values under specified conditions,analogical analysis was used to derive the relation between shuttle length and liquid sloshing frequencies,and hypothesis and analogical analysis were combined to derive the relation between rod quality and liquid sloshing force.Then,FLUENT was utilized to simulate the liquid free oscillation under different original conditions,and the simulation results were used to draw the fitting functions of pendulum parameters about tank shapes and liquid fill levels.The roll moment obtained from FLUENT simulation and pendulum numerical computation has shown that the method proposed is quite useful and the relative errors between parameters fitting results and the actual ones are all in the range of±4%.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第6期53-58,共6页
Journal of Hunan University:Natural Sciences
基金
国家'十一五'科技支撑计划重大资助项目(2009BAG13A04)
吉林大学研究生创新基金资助项目(20121099)
关键词
液体冲击
椭圆钟摆模型
参数推导
类比分析
FLUENT仿真
liquid sloshing
trammel pendulum model
parameters derivation
analogical analysis
FLUENT simulation
