摘要
基于Ritz法,考虑了纤维方向及激励频率的影响,对纤维增强复合材料构成的薄板结构的非线性阻尼参数进行了分析与预测.分别推导了纤维增强复合薄板总的应变能与耗散能的表达式,明确了采用Ritz法获得该结构系统阻尼参数的原理;编写了MATLAB程序,并提出了预测纤维增强复合薄板非线性阻尼参数的流程;以玻璃纤维/树脂复合薄板为例,在不同的纤维方向和激振频率下,对其非线性阻尼参数进行分析与预测,并与测试获得的阻尼结果进行了对比,验证了该分析方法的正确性.
In consideration with fiber orientation and excitation frequency via Ritz method,the damping parameters of fiber reinforced composite thin plates are analyzed and predicted.Firstly,the expressions of the total strain and dissipated energies are deduced.Then,the corresponding theoretical principles of damping parameters are further clarified using Ritz method.Next,the process of predicted damping parameters are speculated based on the self-written MatlabTM programs.Finally,by treating the glass fiber composite thin plate as an example,the nonlinear damping parameters are analyzed and predicted under different fiber orientations and excitation frequencies.In addition,the effectiveness and correctness of the proposed method is verified in comparison with experimental results.
出处
《中国工程机械学报》
北大核心
2016年第2期162-167,共6页
Chinese Journal of Construction Machinery
基金
国家自然科学基金资助项目(51505070)
国家自然科学基金(51375079)
国家重大科学仪器设备开发专项(2013YQ470765)
关键词
RITZ法
非线性阻尼
纤维增强复合薄板
阻尼分析
Ritz method
nonlinear damping
fiber-reinforced composites thin plate
damping analysis
