【摘要】 探讨了测定玻纤增强聚脂弯管应变导纳的试验方法。给出了力通道和应变通道的标定曲线。确定了玻纤聚脂弯管的第一、第二阶模态频率和阻尼比以及单位力幅下的动应变值。借助应变导纳的幅频特性和相频特性分析了弯管动应力。还用静态试验验证了动态测试的正确性更多还原

【Abstract】 The experimental method of measuring the strain mobility of glass fibre reinforced ployseter bending tubes was discussed,the calibration curves of the force canal and the strain canal were given, the model frequencies and the model damp ratios of the first step and the second step of the glass fibre reinforced polyester bending tubes and the dynamic strain value per newton force were determined,the dynamic stress of the bending tubes was analysed with the amplitude frequency characteristics and phase frequency characteristics of the strain mobility,the correctness of dynamic measurement was verified with static experiments.更多还原