【作者】 严新军；

【导师】 侍克斌；

【作者基本信息】 新疆农业大学 ， 水利水电工程， 2004， 硕士

【摘要】 本文针对内陆干旱区平原水库水面无效蒸发量大的问题，提出用苯板漂浮水面的工程措施来防止蒸发损失，从而达到平原水库节水的目的。通过大量的现场试验和系统的理论分析，建立了一套关于浮板稳定分析的理论计算公式。首先，应用数理统计和物理实验的方法确定苯板最优的几何、物理力学参数，然后在现场选用八种不同的试验方案进行试验；其次，对现场试验结果进行理论分析，在合理假设的基础上，运用水力学、空气动力学、波浪力学及弹塑性力学等理论，建立三种不同受力状态下浮板抗折断破坏的力学模型，其中对边界条件复杂的力学模型用数值分析的方法求解，并总结出一套差分法求解混合边界条件下矩形板的挠度、内力计算公式；最后，运用本文建立的三种力学模型进行了在风浪共同作用下浮板的结构计算，结果与现场观测基本吻合，证明该模型具有一定的合理性，可以应用到类似的工程计算中。更多还原

【Abstract】 The aim of the experiment is to reduce the large amount of ineffective evaporation in inland arid area plain reservoirs by using polystyrene foam plastic slabs floating on the water surface. By doing many field experiments and systematic theoretical analysis, the paper derives a theoretical calculating equation on floating slab. Firstly, the optimum geometrical, physical, mechanical parameter is determined by the method of probability analysis and physical experiment. Secondly, the author do field experiments under eight different experimental schemes and analyse the results. Then, based on reasonable hypothesis, using the theory of Hydromechanics, Aerodynamics, Wave Mechanics and Mechanics of Elasticity and Plasticity, the author derives three different mechanical models on floating anti-break slabs. In addition, using numerical analysis the study calculates the mechanical models under complex boundary condition and by using difference method concludes the calculating equation on deflection and inner force of the rectangular slab under mixing boundary condition. Finally, the paper works out the structure of the slab under the joint wind wave action by using the former three mechanical models. The results are consistent with the field observation. It is proved that the models are reasonable. So it can be applied in the similar engineering calculation.更多还原