Assembly research of aero-engine casing involving bolted connection based on rigid-compliant coupling assembly deviation modeling

Kang, Hehe; Li, Zhimin

doi:10.1177/0954406220910455

Cited by 15 publications

(5 citation statements)

References 30 publications

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“…Du et al 24 applied the Jacobian-Torsor model to the single-axis assembly, in which the partial parallel connection of features is considered. Kang and Li 25 integrated the numerical simulation result of partial flexibility structures into the Jacobian-Torsor model and realized the error analysis with partial flexibility structures in the bolt fastening. Ding et al 26 considered the part characteristics of multi-axis rotors to establish an improved Jacobian-Torsor model that was applied to aero-engine rotor assembly.…”

Section: Introductionmentioning

confidence: 99%

Flexible assembly research for cylindrical interference fit with form error in shaft-hole structures

Hai-dong

Xia

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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The interference fit has been widely used for torque transmission and assembly stability in the modern machinery industry. The form error of cylindrical feature is propagated during the interference fit of shaft-hole assembly, which causes the translation and rotation of following structures. Therefore, the overall precision variation is difficult to be predicted. In this paper, an error computational model of interference fit stage is proposed to represent the form error propagation of cylindrical features in the shaft-hole assembly. The characteristic parameter of form error is obtained by the minimum zone cylinder method and integrated into the small displacement torsor. The deformation behavior of interference fit with form error is described as a weakening propagation of error. An interference fit error propagation coefficient is introduced to quantify the phenomenon of weakening propagation of error, which depends on particular fit conditions such as materials, sizes, and interference range of parts. The error computational model for interference fit with form feature is deduced by using the Jacobian-Torsor theory. The characteristic of deformation flexibility in the interference fit is well considered comparing to the simple rigidity analysis in the traditional Jacobian-Torsor model. An error analysis of a shaft-hole structure deciding the symmetry and sensibility performance in the servo valve is conducted to verify the applicability. The cylindrical feature error and deformation during the interference fit are included. The results show that the new error model may represent characteristics of interference fit error propagation with form feature and has a higher reliability than the traditional error models.

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Section: Introductionmentioning

confidence: 99%

Flexible assembly research for cylindrical interference fit with form error in shaft-hole structures

Hai-dong

Xia

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…The final assembly quality was improved by minimizing the eccentric deviation. Kang and Li 7 investigated the tolerance propagation of the bolted joint in multistage aero-engine casing and presented the effect of flexible assembly deviation caused by bolt preload. The result showed a mean shift on the statistical distribution of the concentricity deviation.…”

Section: Introductionmentioning

confidence: 99%

A novel method to design tolerance of aero-engine casing by integrating 3-D assembly tolerance with performance instability

Kang

Liu

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Assembly quality of aero-engine casing plays a key role in the whole aero-engine, since it is directly related to the final function and dynamic performance. However, during the design phase, the tolerance analysis is usually conducted independently without any consideration of the effect on the dynamic characteristic. This paper aims to integrate manufacturing precision with dynamic performance instability together. First, the 3-D tolerance model of the aero-engine casing is constructed based on the Jacobian-Torsor theory. The target deviation from the tolerance model is defined as the input variable into the vibratory governing equation. Then, the effect of 3-D assembly deviation on the natural frequency is studied. The corresponding frequency distributions for different vibration modes are illustrated. Finally, the mapping relationship between assembly tolerance and fluctuation ratio of natural frequency is established through the 3-D fitted surface. Under the given constraint of performance stability, the optimized tolerance zone is obtained. This work provides a significant guidance for performance improvement and tolerance design in the aero-engine casing assembly.

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“…Chen et al developed an assembly error propagation model of multistage asymmetric rotors that take into account the alignment process and distribution of the screw holes of adjacent asymmetric rotors [16]. Kang et al modified the Jacobian-Torsor model to construct multistage casing component deviations, which can simultaneously solve flexible deformation tolerances and geometric manufacturing tolerances [17]. Eissa et al proposed a positive position feedback (PPF) controller to control the nonlinear vibration of a horizontally supported rotor system and a system model considering the nonlinear restoring force of the rotor and the weight of the rotor ws established [18].…”

Section: Introductionmentioning

confidence: 99%

Multistage Asymmetric Rotors Coaxial Measurement Stacking Method Based on Minimization of Exciting Force

et al. 2021

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The unbalanced exciting force of high-speed rotary asymmetric rotor equipment is the main factor causing rotor vibration. In order to effectively suppress the vibration of the asymmetric rotor equipment, the paper establishes a multistage asymmetric rotor coaxial measurement stacking method that minimizes the exciting force. By analyzing the propagation process of the centroid of the multistage asymmetric rotor assembly and analyzing the relationship between the geometric center and the centroid of a single asymmetric rotor, a multistage asymmetric unbalanced rotor propagation model based on geometric center stacking is established. The genetic algorithm is used to optimize the unbalance of the multistage asymmetric rotors. Combined with the vibration principle under the exciting force, the vibration amplitude of the left bearing at different rotation speeds under the minimization of the exciting force and the random assembly phase is analyzed. Finally, the experimental asymmetric rotors are dynamically measured, combined with the asymmetric rotors’ geometric error measurement experiment. The experimental results confirm that the vibration amplitude of the assembly phase with the minimum exciting force is smaller than the vibration amplitude under the random assembly phase at three-speed modes, and the optimization rate reached 73.2% at 9000 rpm, which proves the effectiveness of the assembly method in minimizing the exciting force.

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Assembly research of aero-engine casing involving bolted connection based on rigid-compliant coupling assembly deviation modeling

Cited by 15 publications

References 30 publications

Flexible assembly research for cylindrical interference fit with form error in shaft-hole structures

Flexible assembly research for cylindrical interference fit with form error in shaft-hole structures

A novel method to design tolerance of aero-engine casing by integrating 3-D assembly tolerance with performance instability

Multistage Asymmetric Rotors Coaxial Measurement Stacking Method Based on Minimization of Exciting Force

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