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以非对称层压板结构为基础,利用APDL语言开发了针对碳纤维复合材料综框的参数化建模程序。计算和分析了综框的模态频率、振型及谐振响应,指出:第4阶自振频率(ω4)对综框谐振响应最为敏感。建立了基于复合材料层压板结构的综框动力学优化数学模型,采用随机搜索算法对纤维层厚参数h、纤维方向参数α,γ进行动态改进。结果表明:最佳的纤维层厚为0.234 mm、纤维铺设方向为[0°/24.39°/-31.02°/90°]。动力学优化将ω4增大了3.95%,消除了危害明显的谐振频率,有利于综框的技术进步。
Based on the asymmetric laminate structure, a parameterized modeling program for carbon fiber composite heald frames was developed using the APDL language. The modal frequencies, mode shapes and resonance responses of the heald frames are calculated and analyzed. It is pointed out that the 4th order natural frequency (ω4) is the most sensitive to the resonant responses of the heald frames. A mathematic model of heald frame dynamics optimization based on laminated structure of composite materials was established. The parameters of fiber thickness h, fiber orientation parameters α and γ were dynamically improved by random search algorithm. The results show that the optimum fiber thickness is 0.234 mm and the fiber laying direction is [0 ° / 24.39 ° / -31.02 ° / 90 °]. Kinetic optimization of ω4 increased by 3.95%, eliminating the obvious harm to the resonant frequency, is conducive to technical advances in the heald frame.