Optimization of aircraft engine suspension systems

Swanson, D.A.; Wu, Henry T.; Ashrafiuon, Hashem

doi:10.2514/6.1991-1102

Cited by 14 publications

(24 citation statements)

References 3 publications

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“…The mechanism of optimization was investigated. It can be seen from Table 3 that the isolation improvement in the optimized system is not by moving a natural frequency from an input forcing frequency so as to increase the frequency ratio f/f as stated by Swanson [3] and Spiekermann [2]. This is because the original isolation system has lower system natural frequencies and the higher frequency ratio.…”

Section: Comparison Of the System Natural Frequencies Between Originamentioning

confidence: 80%

“…Complex spring sti!ness is used to model the dynamic behaviour of the mount [3]. The complex sti!ness of a mount in the three directions of its local co-ordinate system is de"ned by the equation…”

Section: Engine}mount System Equationsmentioning

confidence: 99%

“…This function penalized the natural frequencies in an undesirable frequency range and also large design changes. However, Swanson et al [3] showed that the transmitted forces should be directly minimized rather than the natural frequencies in order to determine a`trulya optimal design of the mount. He used the recursive quadratic programming technique for the optimal isolation system design of aircraft engine.…”

Section: Introductionmentioning

confidence: 99%

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Design Optimization of Marine Engine-Mount System

Tao

Liu

Lam

2000

Journal of Sound and Vibration

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Section: Comparison Of the System Natural Frequencies Between Originamentioning

confidence: 80%

Section: Engine}mount System Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design Optimization of Marine Engine-Mount System

Tao

Liu

Lam

2000

Journal of Sound and Vibration

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“…An overview of SQP is found in Fletcher [13]. 6. CASE STUDY Consider a typical engine that is installed as illustrated in Figure 1.…”

Section: Evaluate All the Individuals (Apply Some Function Or Formulamentioning

confidence: 99%

“…Complex spring sti!ness is used to model the dynamic behavior of the mount [6]. The complex sti!ness of a mount in the three directions of its local co-ordinate system is de"ned by the equation…”

Section: Direct Equations Of Engine Motionmentioning

confidence: 99%

Excitation Force Identification of an Engine With Velocity Data at Mounting Points

Tao¹,

Liu²,

Lam³

2001

Journal of Sound and Vibration

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Design sensitivity and optimization of powertrain mount system design parameters for rigid body modes and kinetic energy distributions

Şendur

Tunç

2020

J Braz. Soc. Mech. Sci. Eng.

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This study evaluates the influences of the powertrain mount design parameters on the frequencies of powertrain rigid body modes and their kinetic energy distributions (KEDs), which play an important role in the low-frequency vibration of vehicles. A total of 12 design parameters (x, y, z position of mount locations and translational stiffness of the front and rear powertrain mounts) were evaluated in terms of their contributions to the aforementioned metrics. A multi-body dynamics simulation model was used in a 512-run modal analysis by varying the design variables across their common range, and the results were used in design sensitivity analysis. Response surface models for the frequencies of each powertrain rigid body mode and their KEDs were derived and subsequently used in optimization studies. It was shown that front and rear powertrain mount stiffness in y-direction has a strong influence on the frequency of powertrain lateral mode (21.5% and 24.5%, respectively). Front mount location in the x-direction demonstrates a strong influence on the pitch mode (25.7%), while the rear mount stiffness in the z-direction is the most influential on frequency of powertrain vertical mode with 29.1%. The location of the rear powertrain mount in the z-direction has a significant effect on the KED of fore-aft mode with 37.8% sensitivity. NSGA-II genetic algorithm with 100 generations was used for optimization to meet a set of design targets compiled from the literature. For the placement of the frequencies of powertrain rigid body modes with desired KED, design sensitivities, which are derived from a system-level approach, give important design direction to address the complex interactions between powertrain mount locations and stiffness and key metrics of the powertrain mount systems. Knowledge of design sensitivity of design parameters is important in the vehicle design cycle for OEMs to prioritize their design decisions. Finally, the optimization methodology is key to tune the design parameters to meet the conflicting design targets more efficiently.

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Optimization of aircraft engine suspension systems

Cited by 14 publications

References 3 publications

Design Optimization of Marine Engine-Mount System

Design Optimization of Marine Engine-Mount System

Excitation Force Identification of an Engine With Velocity Data at Mounting Points

Design sensitivity and optimization of powertrain mount system design parameters for rigid body modes and kinetic energy distributions

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