The Experts below are selected from a list of 18 Experts worldwide ranked by ideXlab platform
Fulei Chu - One of the best experts on this subject based on the ideXlab platform.
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Numerical Studies on Time-Varying Stiffness of Disk-Drum Type Rotor with Bolt Loosening
Journal of Physics: Conference Series, 2015Co-Authors: Zhaoye Qin, Fulei ChuAbstract:Disk-drum type Rotors are widely used in industry for their high stiffness and low weight properties. In disk-drum type Rotors, the adjacent disks and drums are commonly connected by bolted joints. Those rotating joint interfaces are subjected to numerous combinations of loads during normal operation, where loosening of the connecting bolts might occur. The bolt loosening will change the local stiffness of the Rotor, which in turn affect the Rotor dynamics and even result in structural failures. In this paper, the local stiffness of a disk- drum Rotor with bolt loosening is investigated numerically. A three-dimensional (3D) finite element (FE) model for the bolted disk-drum joint is established in ANSYS, where the bolt loosening is simulated by reducing the preloads of certain bolts, and removing those bolts as the limiting case. Simulations are performed on the FE model to evaluate the joint behaviour under static loads. Periodic variations of the joint deflections with respect to the rotation angle of the shaft are obtained, which implies the appearance of the time-varying local stiffness in the Rotor system. The studies in this paper help accurate prediction of the Rotor dynamics and early detection of bolt loosening.
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Finite Element Modeling and Dynamic Analysis of Rotating Disc and Drum Connected by Bolted Joints
Advanced Engineering Forum, 2011Co-Authors: Zhaoye Qin, H.y. Wang, Fulei ChuAbstract:The disc-drum type Rotors are commonly used in large gas turbine engines. In this paper, the dynamic characteristics of single stage disc-drum structure are studied based on the finite element model, where the connecting bolts are modeled using solid elements and the frictional contact at the joint interface is accommodated. In order to evaluate the nonlinearity resulting from the bolted joints, a finite element (FE) model fixing the disc and drum together is also established, and the simulation results based on the two models are compared. The effects of the bolt preload and the rotating speed on the dynamic characteristics of the disc-drum structure are also discussed. The works proposed in this paper help to enhance the understanding of the dynamics of the disc-drum type Rotor.
Zhaoye Qin - One of the best experts on this subject based on the ideXlab platform.
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Numerical Studies on Time-Varying Stiffness of Disk-Drum Type Rotor with Bolt Loosening
Journal of Physics: Conference Series, 2015Co-Authors: Zhaoye Qin, Fulei ChuAbstract:Disk-drum type Rotors are widely used in industry for their high stiffness and low weight properties. In disk-drum type Rotors, the adjacent disks and drums are commonly connected by bolted joints. Those rotating joint interfaces are subjected to numerous combinations of loads during normal operation, where loosening of the connecting bolts might occur. The bolt loosening will change the local stiffness of the Rotor, which in turn affect the Rotor dynamics and even result in structural failures. In this paper, the local stiffness of a disk- drum Rotor with bolt loosening is investigated numerically. A three-dimensional (3D) finite element (FE) model for the bolted disk-drum joint is established in ANSYS, where the bolt loosening is simulated by reducing the preloads of certain bolts, and removing those bolts as the limiting case. Simulations are performed on the FE model to evaluate the joint behaviour under static loads. Periodic variations of the joint deflections with respect to the rotation angle of the shaft are obtained, which implies the appearance of the time-varying local stiffness in the Rotor system. The studies in this paper help accurate prediction of the Rotor dynamics and early detection of bolt loosening.
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Finite Element Modeling and Dynamic Analysis of Rotating Disc and Drum Connected by Bolted Joints
Advanced Engineering Forum, 2011Co-Authors: Zhaoye Qin, H.y. Wang, Fulei ChuAbstract:The disc-drum type Rotors are commonly used in large gas turbine engines. In this paper, the dynamic characteristics of single stage disc-drum structure are studied based on the finite element model, where the connecting bolts are modeled using solid elements and the frictional contact at the joint interface is accommodated. In order to evaluate the nonlinearity resulting from the bolted joints, a finite element (FE) model fixing the disc and drum together is also established, and the simulation results based on the two models are compared. The effects of the bolt preload and the rotating speed on the dynamic characteristics of the disc-drum structure are also discussed. The works proposed in this paper help to enhance the understanding of the dynamics of the disc-drum type Rotor.
H.y. Wang - One of the best experts on this subject based on the ideXlab platform.
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Effect of Bolt Number on Joint Stiffness of Disc and Drum Connected by Bolted Joints
Proceedings of the 2015 International Conference on Electrical Automation and Mechanical Engineering, 2015Co-Authors: H.y. Wang, Z.y. Qin, F.l. ChuAbstract:The disc-drum type Rotors are widely used in large turbofan engines, where the drums are connected the adjacent disks with the bolted joints. In this paper, the joint stiffness characteristics of a disc-drum structure are investigated based on the finite element model. Firstly, the nonlinear finite element model for the disc-drum structure is established, where the connecting bolts are modelled and the frictional contact of the joint components is also considered. Then, the variation of joint stiffness of the disc-drum structure with the bolt number subjected to external axial force and bending moment are studied respectively. The works proposed in this paper is helpful to enhance the understanding of the joint stiffness properties of the disc-drum type Rotor. Keywords-joint stiffness; bolt number; disc-drum structure; bolted joints; FEM
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Finite Element Modeling and Dynamic Analysis of Rotating Disc and Drum Connected by Bolted Joints
Advanced Engineering Forum, 2011Co-Authors: Zhaoye Qin, H.y. Wang, Fulei ChuAbstract:The disc-drum type Rotors are commonly used in large gas turbine engines. In this paper, the dynamic characteristics of single stage disc-drum structure are studied based on the finite element model, where the connecting bolts are modeled using solid elements and the frictional contact at the joint interface is accommodated. In order to evaluate the nonlinearity resulting from the bolted joints, a finite element (FE) model fixing the disc and drum together is also established, and the simulation results based on the two models are compared. The effects of the bolt preload and the rotating speed on the dynamic characteristics of the disc-drum structure are also discussed. The works proposed in this paper help to enhance the understanding of the dynamics of the disc-drum type Rotor.
F.l. Chu - One of the best experts on this subject based on the ideXlab platform.
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Effect of Bolt Number on Joint Stiffness of Disc and Drum Connected by Bolted Joints
Proceedings of the 2015 International Conference on Electrical Automation and Mechanical Engineering, 2015Co-Authors: H.y. Wang, Z.y. Qin, F.l. ChuAbstract:The disc-drum type Rotors are widely used in large turbofan engines, where the drums are connected the adjacent disks with the bolted joints. In this paper, the joint stiffness characteristics of a disc-drum structure are investigated based on the finite element model. Firstly, the nonlinear finite element model for the disc-drum structure is established, where the connecting bolts are modelled and the frictional contact of the joint components is also considered. Then, the variation of joint stiffness of the disc-drum structure with the bolt number subjected to external axial force and bending moment are studied respectively. The works proposed in this paper is helpful to enhance the understanding of the joint stiffness properties of the disc-drum type Rotor. Keywords-joint stiffness; bolt number; disc-drum structure; bolted joints; FEM
Z.y. Qin - One of the best experts on this subject based on the ideXlab platform.
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Effect of Bolt Number on Joint Stiffness of Disc and Drum Connected by Bolted Joints
Proceedings of the 2015 International Conference on Electrical Automation and Mechanical Engineering, 2015Co-Authors: H.y. Wang, Z.y. Qin, F.l. ChuAbstract:The disc-drum type Rotors are widely used in large turbofan engines, where the drums are connected the adjacent disks with the bolted joints. In this paper, the joint stiffness characteristics of a disc-drum structure are investigated based on the finite element model. Firstly, the nonlinear finite element model for the disc-drum structure is established, where the connecting bolts are modelled and the frictional contact of the joint components is also considered. Then, the variation of joint stiffness of the disc-drum structure with the bolt number subjected to external axial force and bending moment are studied respectively. The works proposed in this paper is helpful to enhance the understanding of the joint stiffness properties of the disc-drum type Rotor. Keywords-joint stiffness; bolt number; disc-drum structure; bolted joints; FEM
