【摘要】 动力离心机被当前岩土地震工程界公认为最有效、先进的室内物理模型研究手段,但全球现役数量仍十分稀缺,大量动力和静力土工离心机在各国处于建设和筹划阶段。动力离心机建设具有问题多、难度大、周期长等特点,尤其是中、大型。风阻功率作为离心机驱动电机选取和机室冷却系统设计的基础参数,是设计关键问题之一,直接影响设备工作安全性和试验结果可靠性。本文以风阻功率和冷却方法为两个核心,首先建立与求解了风阻功率简化模型和计算方法,解释了土工离心机风阻功率发生机制和计算问题,提出了便于工程应用的简化估算方法;分析了机室内风场和温度场分布特点,提出了节能冷却系统设计优化方法。更多还原

【Abstract】 For the most effective and advanced technique of laboratory physical-modeling in geotechnical earthquake engineering domain,dynamic centrifuge remains scarce relative to extensive worldwide demands leading to a considerable amount of both dynamic and static facilities under construction or planning among countries. The development of dynamic centrifuge is featured by multi-complex issues,great difficulties and long periods,particularly medium and large scale. As a fundamental parameter to driving motor selection and indoor cooling system design for dynamic centrifuge,wind resistance power estimation is a key problem during design stage directly impacting facility working security and test result reliability. Focusing on the wind resistance power and cooling methodology,a simple model of wind resistance power is first proposed with derivation of theoretical calculation method,and then a simplified calculation technique for practice is developed based on generation mechanism and calculation issues.For cooling design methodology,an optimization method is presented by considering characteristics of indoor wind and temperature distribution and energy-saving.更多还原