Vibration damping method of cantilever structure considering redundant constraint of monocrystalline blade casting mold shell

• Published in: Measurement : journal of the International Measurement Confederation Vol. 236; p. 115100
• Main Authors: Huiyu, Xu, Guangfu, Bin, Da, Zhang, Huaitao, Shi
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15-08-2024
• Subjects: Monocrystalline blade; Redundant constraint; Vibration characteristics; Vibration damping; Vibration characteristics; Vibration damping; Redundant constraint; Monocrystalline blade
• ISSN: 0263-2241; 1873-412X
• DOI: 10.1016/j.measurement.2024.115100

•The dynamics of the casting lifting device-mold shell system is analyzed theoretically to reveal the influence of key parameters such as excitation force, damping and stiffness on the monocrystalline blade casting.•The effect of redundant constraint on the system is analyzed.•A slide-support arm device is designed to provide redundant constraint, and the lifting device-mold shell system test bench is developed.•High-precision triaxial capacitive accelerometers have been developed to accurately test low and medium-frequency vibration signals.•The time and frequency domain characteristics of the vibration signals are analyzed, and the undesired vibration of mold shell is reduced by more than 77%, ensuring the casting quality of monocrystalline blades.
Excessive vibrations of the mold shell during the manufacturing process of monocrystalline blades lead to dendirite and frekle defects in directional solidification. The dynamics of the casting lifting device-mold shell system is analysed theoretically to reveal the influence of key parameters such as excitation force, damping and stiffness on the monocrystalline blade casting. The effect of redundant constraint onto the system is analysed via the developed vibration model. A lifting device-mold shell system test bench is developed, a slide-support arm device is designed to provide redundant constraint. A self-developed high-precision sensor is used to test the vibration signals, and the effectiveness of the damping method is verified. The experimental results show that the redundant constraint can reduce the undesired vibration of mold shell by more than 77 %, which ensures the casting quality of monocrystalline blades. The proposed vibration damping method can provide a reference for the vibration damping of the cantilever machine.