首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference 2006 vol.4 pt.A: Fluid-Structure Interaction >AEROTHERMOELASTIC BEHAVIOR OF SUPERSONIC ROTATING THIN-WALLED BEAMS MADE OF FUNCTIONALLY GRADED MATERIALS
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AEROTHERMOELASTIC BEHAVIOR OF SUPERSONIC ROTATING THIN-WALLED BEAMS MADE OF FUNCTIONALLY GRADED MATERIALS

机译:功能梯度材料制成的超音速旋转薄壁梁的气动弹性行为

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In this study a thin walled-beam made of functionally graded material (FGM) which is used as rotating turbomachinery blade under the aerothermoelastic loading is considered. The governing equations, based on small deflection with transverse shear and rotary inertias beam model, are considered with the presetting angle included. The effects of constant angular velocity and wall temperature due to flow motion also have been included. Quasi-steady aerodynamic pressure loadings are determined using first order piston theory as well as steady wall temperature through gas dynamic theory. Due to aerothermoelastic terms in loading, the gyroscopic matrix was generated in equations of motion. The blade partial differential equations are transformed into a set of ordinary differential equation through the Galerkin approach. The resulting system of equations is solved through the numerical integration. The effects of the variation of Mach number and geometric parameters on the natural frequencies are simulated. Results are indicative of the important influence of aerothermoelastic parameters on vibration behavior.
机译:在这项研究中,考虑了一种由功能梯度材料(FGM)制成的薄壁梁,该梁在气动弹性载荷下用作旋转涡轮机械叶片。考虑具有横向剪切力的小挠度和旋转惯性梁模型的控制方程式,其中包括预设角度。还包括了由于流动引起的恒定角速度和壁温的影响。使用一阶活塞理论确定准稳态空气压力载荷,并通过气体动力学理论确定稳态壁温。由于载荷中的热弹性项,在运动方程中生成了陀螺矩阵。叶片偏微分方程通过Galerkin方法转化为一组常微分方程。所得方程组通过数值积分求解。模拟了马赫数和几何参数变化对固有频率的影响。结果表明了气动弹性参数对振动行为的重要影响。

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