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为分析直升机典型结构元件着水试验边界条件对着水试验的影响,基于CFD方法,采用VOF捕捉自由液面,结合UDF程序对典型结构元件着水试验进行模拟。为验证该CFD方法的准确性,应用该方法计算国际上研究较为普遍的楔形体自由着水问题,结果表明该方法能很好地应用于结构物着水问题。而后将该方法应用到直升机典型结构元件着水试验中,对着水试验方案进行优化设计,分析了水池的宽度、深度以及试验安装平台边界条件对着水试验的影响,得出了最佳的边界条件,并且通过对着水试验的数值模拟,给出了着水试验速度、加速度、位移、力以及压力的时间历程关系,为着水试验方案的优化设计、设备的选取以及试验数据有效性的判定提供了理论基础和技术支持。
In order to analyze the influence of experimental boundary conditions on the water test of the typical structural components of helicopter, the free surface of liquid is captured by VOF based on the CFD method and the water leakage test of typical structural elements is simulated with the UDF program. To verify the accuracy of the CFD method, this method is used to calculate the free waterthing problem of wedges, which is widely studied in the world. The results show that this method can be applied to the problem of water in structures. Then, the method is applied to the water-holding test of the helicopter’s typical structural elements. The water-saving test scheme is optimized and the influence of the width and depth of the water tank and the boundary conditions of the test installation platform on the water test is analyzed. Boundary condition, and through the numerical simulation of the water test, the time history of the water test speed, acceleration, displacement, force and pressure is given, which is the optimal design of the water testing program, the selection of the equipment and the validity of the test data Judgment provided the theoretical basis and technical support.