【摘要】 对超大型结构的固有频率分析,采用常见的实验力学方法,不是受到实验技术条件的限制就是受到研究经费的制约。文章介绍了一种实验模拟方法,它由相似理论作指导,根据动力学平衡微分方程导出频率的相似准则“Kf”,从而实现了用小模型获取超大结构固有频率的转换方法,这种方法既简易又经济,适用于一般工程问题的应用,为超大型结构的动态特性研究提供了一个分析途径。作为一个实例,文章讨论了某钢厂大型水泥平台的固有频率值,所得结果与有限元计算进行了比较,数据十分吻合,说明模拟转换法是可行的。更多还原

【Abstract】 It is may be limited by the test technology conditions or by the test fee that tests the inherent frequency for a super big structure using common experimental method.Therefore,according to the similarity theory,the present paper introduces a simulation method,which can use a small model to gain the inherent frequency for a super big structure by means of the frequency similarity rule K_f educed from the differential equilibrium equations of dynamics.The method is not only simplicity,but also economy.It is more fit for a generally engineering research,which is limited by the condition and the fee.So,we obtain a research way in experimental simulation of inherent values for super big structures.As a engineering example,we discuss the inherent frequency values of a super big concrete platform from a steel factory with the method in this article.The results is identical sufficiently when it is compared with the finite element method.更多还原