| 带单侧裂纹楔梁动力特性研究 |
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| 引用本文： | 邢德顺.带单侧裂纹楔梁动力特性研究[J].航空动力学报,1999,14(4):371-374. |
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| 作者姓名： | 邢德顺 |
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| 作者单位： | 燃气涡轮研究院 |
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| 摘 要： | 由于裂纹存在引起构件局部柔度的变化，本文用线弹性断裂力学理论导出裂纹所释放的应变能，由Ｃａｓｔｉｇｌｉａｎｏ 定理得出局部柔度矩阵诸元素，据此来修正楔形梁的刚度矩阵，借助梁有限单元法，求解带裂纹楔形梁的动力特性，并对裂纹相对深度、裂纹位置、梁的长宽比、宽厚比、厚度斜度等几何因素对固有频率的影响进行了数值研究和相应的振动响应试验
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| 关 键 词： | 梁 振动 裂纹 柔软度 |
| 收稿时间： | 1998/11/1 0:00:00 |
| 修稿时间： | 1998/12/1 0:00:00 |
DYNAMIC BEHAVIOUR INVESTIGATION OF TAPER BEAM WITH SIDEWISE CRACK |
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| Xing Deshun.DYNAMIC BEHAVIOUR INVESTIGATION OF TAPER BEAM WITH SIDEWISE CRACK[J].Journal of Aerospace Power,1999,14(4):371-374. |
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| Authors: | Xing Deshun |
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| Institution: | Gas Turbine Institute,Chendu 610500 |
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| Abstract: | Emergence of crack causes local flexibility variation of the component.A linear elasticity theory of fracture mechanics is applied to deriving the strain energy released by the crack.According to Castigliano theorem,elements of local flexibility matrix are obtained,which can correct the stiffness matrix of the taper beam.The dynamic behaviour of the taper beam has been found out by means of finite element method.The effects of relative depth of crack,crack location,ratios of length to width and width to taper thickness on natural frequency have been numerically investigated and the relevant experiments have been conducted to testify the calculation results. |
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| Keywords: | Beams Vibration Crack Flexibility |
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