Vibration reduction optimization for mistuned bladed disk based on reduced order modeling technique

Zhang, Hongyuan; Yuan, Huiqun; Sun, Hongyun

doi:10.21595/jve.2020.21381

Cited by 6 publications

(4 citation statements)

References 25 publications

(27 reference statements)

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“…During this process, the rotator increases soil porosity and aeration, which in turn improves germination and crop growth. One of the advantages of the rotator over other devices that perform the same operation is the creation of a forward force that reduces the need for tractor traction [1,2]. Compared to conventional plowing machines and tillage methods, the total power required by the rotator is less and the machine is more efficient in direct transfer of engine power to the soil.…”

Section: Introductionmentioning

confidence: 99%

Using Different Angles of Rotating Blades Using the Finite Element Method

Ali Hassan,

Soheili Mehdizadeh

2024

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One of the most important operations in agriculture is tillage, which has a great contribution to increasing crop yield and aeration of the soil and, ultimately, root development. Among the important tools for tillage are rotary rotators that are exposed to high and variable dynamic loads, so they are designed to have both the greatest contribution to soil agitation and high strength; It is necessary. Therefore, in this research, an L-shaped blade sample was designed for a rotator using a Biomimetic method. Due to the extensive research that has been done in the world in the field of manufacturing different types of rotators with a rotating agitator mechanism, therefore, it is necessary to study and optimize the rotator blades according to Iranian conditions. In this study, the studied variables include dependent and independent variables. Dependent variables include von Mises stress and arm displacement, and independent variables include the dimensions and geometric parameters of the Shape of the Rotator Blades. The idea for the blade design was inspired by the paw of a mole rat. Six blades were designed by simple method and biomimetic method and then by finite element method. Effects of blade angle change and design method on stress distribution, maximum displacement, maximum energy absorbed in the blade, reliability and under 400 N checked out. The results showed that in all designed models, the values of stress, displacement and energy absorbed were lower in the biomimetic design mode. As the blade angle increased, the values of the above parameters also decreased. Finally, the best model for having the least von Mises stress and the highest reliability was the blade with a Biomimetic design and a 20-degree angle.

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Section: Introductionmentioning

confidence: 99%

Using Different Angles of Rotating Blades Using the Finite Element Method

Ali Hassan,

Soheili Mehdizadeh

2024

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“…One may also refer to a review on methods for blade arrangement problems presented by [9]. The results of other related investigations in this field were reported in [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Method for Optimal Arrangement of Turbine Blades

Mehne

Jafari²

2023

Preprint

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Installation of blades in the right positions around a disk stage is a critical problem in repairing gas turbines and jet engines. The arrangement may cause an imbalance in the rotor that increases vibration and affects the turbine's performance and lifetime. To find the optimum positions of blades around the disk an assignment problem is proposed in this article. A solving method is then developed based on an improved ant colony optimizer. The method is accelerated in combination with two exchange schemes. The results of implementation in three industrial cases show that the proposed hybrid method is accurate. In addition, it finds the arrangement of blades with a lower imbalance than the two prevalent algorithms.

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“…Mistuning destroys the cyclic symmetry of the structure, increases the amplitude of a few blades, and causes high-cycle fatigue failure. However, there is a great difference in the vibration characteristics between the single blade disk and the whole blade disk system, so it is necessary to establish a multi-stage blade disk system [2].…”

Section: Introductionmentioning

confidence: 99%

Analysis of random mistuning vibration characteristics of multi-stage bladed disk system

You,

Feng,

Zhang

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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In order to investigate the relationship between the mistuning of the aeroengine compressor multistage bladed disk structure and the maximum amplitude of vibration response, a three-stage bladed disk lumped parameter model with inter-stage coupling was established, and Monte Carlo sampling technique was used to simulate the random mistuning mode of the stiffness of the bladed disk system. The vibration response of the three-stage blending-disk system in the harmonic and mistuning state is obtained by analyzing the vibration response of each vibration mode. The results show that the amplitude of the bladed disk system can be reduced by increasing the damping value. In the case of mistuning, the displacement of the bladed disk system and the maximum amplitude of spectrum analysis are larger than those in the case of harmonic. With the gradual increase of the standard deviation of stiffness mistuning, the system response displacement is gradually enhanced, and the maximum response amplitude is obtained at the upper bound point of mistuning strength. So, there is no so-called mistuning 'threshold' condition.

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Vibration reduction optimization for mistuned bladed disk based on reduced order modeling technique

Cited by 6 publications

References 25 publications

Using Different Angles of Rotating Blades Using the Finite Element Method

Using Different Angles of Rotating Blades Using the Finite Element Method

A Hybrid Method for Optimal Arrangement of Turbine Blades

Analysis of random mistuning vibration characteristics of multi-stage bladed disk system

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