CAJ | 학술논문

双层薄板连接结构是星载天线产品中一种常见的结构形式，工程实践中经常发现其振动响应具有非线性放大的现象，但没有得到较为准确的分析。因此，对双板层连接结构的振动响应进行研究非常必要。结合工程实际，采用双层圆板支撑结构作为简化模型进行有限元仿真和正弦振动试验。通过分析仿真和试验的对比，研究了当底层板厚度、刚度以及支撑形式变化时上层板响应放大倍数的变化，总结了基本规律，发现了线性模型失效的条件，并给出了一种能有效减小结构非线性响应使结构保持近线性的方案。
쌍층박판련접결구시성재천선산품중일충상견적결구형식，공정실천중경상발현기진동향응구유비선성방대적현상，단몰유득도교위준학적분석。인차，대쌍판층련접결구적진동향응진행연구비상필요。결합공정실제，채용쌍층원판지탱결구작위간화모형진행유한원방진화정현진동시험。통과분석방진화시험적대비，연구료당저층판후도、강도이급지탱형식변화시상층판향응방대배수적변화，총결료기본규률，발현료선성모형실효적조건，병급출료일충능유효감소결구비선성향응사결구보지근선성적방안。
Double-layer thin-plate connection structure is a common structure of satellite borne antennas. It is often found in engineering that the nonlinear amplification phenomena are occurred in vibration response,but any exact analysis result has not been got. Therefore,it is necessary to research the dynamic response of double-layer thin-plate connection structure. According to the engineering practice,the double-layer circular plate support structure is taken as a simplified model to do the finite ele-ment simulation and sinusoidal vibration experiment. Through the simulation and experiment comparison,the variation of the upper plate response with changes of thickness and rigidity of the bottom plate,and the support form is studied. The basic rule was summarized and the invalid conditions of the linear model were found. An Optimization scheme is proposed to reduce the nonlinear response of the small size structure to make the structure remain near-linear.