输水隧道动力模型试验中相似比尺规律的探讨

结构动力模型试验与动力模型破坏试验中,保持模型与原型相似的基本要求与处理技巧根据试验目的不同,而有所差别。这里就地下输水隧道考虑流-固耦合的动力模型试验进行理论研究和数值模拟,研究中根据工程的实际及模型试验选料的经济实用性,提出当原型与模型弹性模量不相等时的动力相似比尺是以围岩的弹性模量比来计算的规律。为今后复杂的地下水工结构动力模型的结构动力特性和破坏试验的相似问题拓宽思路,提供有用的参考价值。

Study on Similarity Technique for Dynamic Model Test of Water-conveyance Tunnel

For dynamic structural model test and dynamic rupture model test, the basic requirements and treating technique for keeping the similarity relationship between the prototype and the model are different according to the experiment goal. Based on the research and numerical simulation of dynamic model experiment of water-conveyance tunnel in soft soil with considering the fluid-solid coupling, when Young’s modulus of prototype and model is not equal, the dynamic similarity ruler is based on the Young’s modulus ratio of surrounding rock according to the engineering practice and economy of material selection for the test. Some new ideas to keep the similarity between the prototype and the model for dynamic structural model test and dynamic rupture model test of the embankment structures are introduced as valuable reference.