作　　者： ; ; ; ;

机构地区： 东北大学资源与土木工程学院

出　　处： 《东北大学学报（自然科学版）》 2007年第8期1194-1197,共4页

摘　　要： 基于相似理论和量纲分析法,推导出相似指标,并作为试验相似与否的判定原则.以砂、石膏、硅藻土混合物为相似材料,进行相似材料模拟试验.用正交法设计初次试验,用抗压强度相似指标控制试验的相似程度.通过极差分析,得出材料力学指标4个影响因素的重要程度,并在此基础上小范围调整配比进行二次试验,得到符合力学相似指标要求的材料配比.用上述试验设计方法替代全面试验法,可以通过最少的试验次数得到符合相似指标要求的材料配比,大大减少试验次数和时间.试验得出的相似材料配比与力学指标的变化规律,对实际工程相似材料模拟具有一定的参考意义. Based on similarity theory and dimensional analysis, a similarity index was deduced as a criterion to judge whether the test result is similar to the reality or not. Taking the mixture of sand, gypsum and diatomite as imitative specimens, a similarity simulation test was performed. The primary experiment was designed orthogonally where the level of similarity was controlled by a compression similarity index. Through a level-difference analysis, the importance of four influencing factors on mechanical properties were revealed as similarity indices. Then, the secondary experiment was performed with specimens＇ mixture ratio readjusted in a small range, thus finding out an optimal mixture ratio in conformity to the similarity indices based on required mechanical properties. In this way the orthogonally designed experiments were used instead of overall ones so as to reduce greatly the number of experiments with time saved. Experiment results showed the similar materials＇ mixture ratio and how the mechanical indices change, which can offer a reference to the project of which the materials to be used are similar to those in the simulation.

关 键 词： 相似模拟 相似材料 相似指标 正交设计 涵洞 力学指标

领　　域： [航空宇航科学与技术] [航空宇航科学技术]