【摘要】 薄板-细梁组合结构是工程领域常见的一种结构形式,其振动响应特性具有特殊性,会产生模态耦合和响应非线性现象,很多产品中试验已经发现了这一现象,因此,开展专题研究非常必要。笔者在对正弦激励下薄板-细梁组合结构的动力特性进行分析的基础上,设计了振动响应试验,通过对比仿真分析结果和试验结果,验证了线性理论分析结果和试验结果的误差。通过比较薄板-长梁组合和薄板-短梁组合两种情况,验证了不同结构频率分布是都存在模态耦合和薄细结构引起的几何非线性响应,并总结了变化趋势。最后提出一种适用于工程的薄板和细梁组合结构正弦响应仿真方法建议。更多还原

【Abstract】 A assembly with thin plates and beams is a common structure in engineering,and there are some particular phenomena during vibration response experiment,such as mode coupling and nonlinear dynamics.In this paper,we study dynamical characteristics of thin plate and beam assembly under sine vibration conditions,and design a vibration experiment.After analysis and experiment,the difference of the results is analyzed.Both long beam-thin plate and short beam-thin plate are tested,and mode coupling and nonlinear dynamics are verified for different structure frequency configuration.Finally,a method for vibration analysis and experiment is suggested.更多还原