【作者】 赵坤；

【导师】 梁廷伟；

【作者基本信息】 哈尔滨工业大学 ， 一般力学与力学基础， 2014， 硕士

【摘要】 水漂现象是生活中常见的物理现象，近年来在工程领域中积聚了许多类似于水漂现象的工程问题亟待解决，水漂问题值得人们关注。目前，水漂问题的理论研究工作尚待建立，实验工作也刚刚开展。对于水漂体水中阶段的水动力问题以及弹跳动力学特性有待进一步研究和解决。本文通过理论建模、数值计算和动力学特性分析相结合的方法对水漂体的水动力以及连续弹跳动力学特性进行了深入研究，一下为本文的主要研究内容和成果：（1）为解决水漂体水中阶段水动力问题，分别使用了两种不同的理论建立了水漂体的力学模型。首先，以Von Karman楔形体入水冲击理论为基础，建立了平板倾斜入水冲击力模型。其次，根据平板滑行理论建立了平板的滑水力模型。最后，通过数值计算对两种力学模型进行了相关特性的比较，并建立3自由度水漂动力学模型，对两种力学模型进行了仿真验证。（2）建立了6自由度的水漂物理模型，根据Lagrange方程推导了水漂动力学方程，全面的描述了水漂体整个过程的运行姿态和运行轨迹。由于运动方程的复杂性不便于后续的分析处理，因此对水漂体的运动方程进行了相应的简化整理。最后对水漂体可能的运动状态进行了预测和分类，对相应运动状态下的参数进行了调整。（3）对水漂动力学方程进行了数值求解得到了水漂体全过程的轨迹和姿态参数。通过对轨迹和姿态参数的分析，得到了水漂体弹跳动力学特性以及连续弹跳的形成机理。并与文献实验数据进行了比较，验证了动力学模型的合理性。研究结果显示：入水攻角和高速自旋对水漂体的运行轨迹有较大影响。高速自旋的水漂体具有很强的姿态稳定性，能够保证较好的再入攻角实现水漂体的连续弹跳。研究结果可作为类似工程问题和工程设计的理论依据。更多还原

【Abstract】 Hydroplaning phenomenon is common physical phenomena of life, In recentyears in the engineering field has accumulated lots of similar to hydroplaningengineering problems, Hydroplaning issues deserve attention. At present, thetheoretical research work hydroplaning problems yet to be established, has justcarried out the experimental work.The hydrodynamic problem tohydroplaning body water phase and bounce dynamics to be further studied andresolved.Through the combined method of theoretical modeling, numericalcalculation and analysis of dynamic characteristics of hydrodynamic ofhydroplaning body and continuous bounce dynamics are studied, its main contentsand results are as follows:(1) In order to solve the hydroplaning body water phase hydrodynamics,respectively, using two different theory established the mechanical model ofhydroplaning body. First of all, the Von Karman wedge water entry impact theory,establish the flat inclined water entry impact force model. Secondly, based on thesliding plate hydraulic model established flat sliding theory. Finally, a numericalmodel of the two mechanics-related characteristics were compared, and theestablishment of three degrees of freedom hydroplaning dynamics model, twokinds of mechanical models is verified by simulation.(2) Establishment of a6DOF hydroplaning physical model, According toLagrange equation derived dynamic equations, comprehensive description of theoperation of hydroplaning body posture and trajectory the entire process. Becauseof the complexity of the equations of motion is not convenient for analysis offollow-up treatment, the equation of motion of hydroplaning body are arrangedcorresponding simplified. Finally, the motion state of hydroplaning body may be aprediction and classification of the corresponding motion state parameters wereadjusted.(3) On hydroplaning dynamic equations are solved numerically to obtain thetrajectory and attitude parameters hydroplaning body of the whole process. Throughthe analysis of the trajectory and attitude parameters obtained hydroplaning bodydynamics and the formation mechanism of continuous bounce bounce. And with thereported experimental data were compared to verify the reasonableness of thedynamic model.The results indicate that the attack angle and high speed spin have a great effecton the trajectory of the hydroplaning body, since high-speed self-spinning hydroplaning body has a strong stability of posture and is capable of ensuring agood reentry attack angle, which can realize successive bounce. Numericalsimulations for a typical hydroplaning are given to illustrate the hydroplaningphenomena and to verify the theoretical results presented here.更多还原