摘要
通过物理模型实验,对弹性侧壁液舱和刚性液舱内液体晃荡问题进行了研究。由于流固耦合的影响,弹性侧壁液舱内液体晃荡的最低阶固有频率稍小于同尺寸的刚性液舱内液体晃荡的最低阶固有频率。液舱模型处于纵向简谐激励作用下,其中激励频率在最低阶固有频率附近。实验分析两种相对液深比h/L=0.167和h/L=0.333,在二阶模态的次共振和一阶模态的共振状况下,对弹性侧壁液舱与刚性液舱内不同测点的波面、振幅谱和晃动波高进行对比分析。结果表明:在浅液深(h/L=0.167)一阶共振下,流固耦合对波面形态的影响比较明显,弹性侧壁液舱内测点晃动波高明显大于刚性液舱内对应测点波高;而在一般液深(h/L=0.333)一阶共振下,水弹性效应减弱,弹性侧壁液舱与刚性液舱内对应测点处波高差异较小。
This paper presents the experimental investigation of the three-dimensional resonant sloshing in a square-base elastic and rigid tank. Due to the influence of the fluid-structure interaction,the lowest natural frequency of the liquid in the elastic tank slightly deviates from that in the rigid tank of the same size. The model tanks are excited in 1-D harmonic longitudinal motion and the excitation frequency is in the vicinity of the lowest natural frequency of the liquid. Two relative fill levels（ h/L） with liquid-depth（ h）-to-tank-breadth（ L） ratios of 0.167 and 0. 333 are considered. For the cases of the secondary resonance of the second mode and the resonance of the first mode,the wave elevation and amplitude spectrum at different measuring points in the rigid and elastic tanks are compared and analyzed. The analysis results indicate that for the shallow water depth（ h/L = 0.167）,the effects of the fluid-structure interaction play an important role in the wave regimes and the wave height in the elastic tank is obviously larger than that in the rigid tank in the case of the first mode resonance. While for the moderate water depth（ h/L = 0.333）,the hydro-elastic effect has little effect on the wave regimes and there is little difference between the wave height in the elastic tank and that in the rigid tank.
出处
《海洋工程》
CSCD
北大核心
2017年第6期45-54,共10页
The Ocean Engineering
基金
国家自然科学基金资助项目(51179030
51221961)
