Stochastic analysis using the generalized perturbation stable node-based smoothed finite element method

Hu, Xiaobin; Cui, Xiangyang; Feng, Hui; Li, G.Y.

doi:10.1016/j.enganabound.2016.06.002

Cited by 45 publications

(6 citation statements)

References 39 publications

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“…For the research of propeller hub, domestic scholars have mainly done the following research: Hu et al [8] analyzed the strength of each component in the hub mechanism of CPP by using the finite element analysis method considering the geometric structure of hub components and the assembly contact relationship between parts. Shi et al [9] proposed a design method for the hub mechanism of marine CPP by combining engineering design and software design.…”

Section: Introductionmentioning

confidence: 99%

Design and strength simulation of hub mechanism of variable pitch propeller

Ning,

Zhong,

Sun

et al. 2024

J. Phys.: Conf. Ser.

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The hub mechanism is an important force bearing mechanism of variable pitch propellers and an important actuator of variable pitch control in tilting ducted propeller UAV. To solve the problem of the connection between the blades and the fuselage of the tilting ducted propeller UAV, according to the parameters of the blades, the force of the hub mechanism is analyzed, and the design parameters of the hub mechanism are obtained by using the theoretical calculation method, such as the power density method. The strength of the parts is analyzed by using the finite element method. A variable-pitch propeller hub mechanism was developed for tilting ducted unmanned aerial vehicles. A design flow of the hub mechanism is formed, including the design of the parts of the hub mechanism and the strength check. This will facilitate the design and development of ducted UAVs.

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Section: Introductionmentioning

confidence: 99%

Design and strength simulation of hub mechanism of variable pitch propeller

Ning,

Zhong,

Sun

et al. 2024

J. Phys.: Conf. Ser.

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“…Among them, MCs is the most common and simplest method, but its accuracy is largely based on the quantity of samples, resulting in high-level computational costs [19][20][21]. Therefore, MCs is often used as a reference solution to validate other probabilistic methods [22][23][24]. The stochastic spectrum method is more efficient and takes advantage of generality, but it is still difficult to apply to large-scale problems.…”

Section: Introductionmentioning

confidence: 99%

A generalized isogeometric boundary element method for the uncertain analysis of infinite domain two-dimensional acoustic problems

Yang,

Huo,

Yuan

et al. 2023

Front. Phys.

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The key aim of this paper is to provide a new nth generalized order perturbed isogeometric fast multistage technique of boundary elements to compute the propagation of time harmonics in an infinite region. Structural geometry and boundary integral equations are constructed by using non-uniform rational B-splines. The source of system uncertainty is believed to be the incident plane wave number’s unpredictability. The actual field, depending on the input random variables, is simulated using the extended nth-order perturbation method. The field and kernel values for boundary integral formulas are generated via the nth-order generalized series of Taylor expansions using perturbation parameters. The fast multipole method (FMM) is utilized to speed up the process. The effectiveness and correctness of the proposed algorithm are verified by Monte Carlo simulations (MCs) with numerical examples.

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“…In geometric modeling of braided composites, yarn paths are usually represented by specific function curves, which makes modeling difficult [ 10 , 11 , 12 ]. Tsai K H [ 13 ] used one-dimensional spring units to simulate yarn predicts elastic properties.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Internal Geometric Variability and Statistical Property Prediction of Braided Composites

Zhu

Shao

et al. 2022

Materials

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Due to the advantages of high specific strength, specific stiffness, and excellent fatigue resistance, carbon fiber reinforced braided composites have been widely applied in engineering. Since the molding process of braided composites is complex and immature, substantial variability of the internal geometry exists in composites, in which the yarn path with uncertainty is a main factor, so it is necessary to establish an uncertainty model to study the influence of randomness of the yarn path on mechanical properties, which is significantly related to the fatigue resistance properties of composite. An uncertain mesoscopic model with uniform distribution of yarn paths is proposed. Assuming the yarn path is spatially varying in interval range, the variability of yarn path is represented geometrically in the unit cell of composite. The three-dimensional coordinates of the yarn trajectory are calculated, the meso-uncertainty models of 2-D and 2.5-D braided composites are established. The equivalent elastic parameters and the thermal expansion coefficients are obtained by applying homogenization method and temperature field boundary conditions to the mesoscopic model. The effect of yarn path uncertainty on the statistical characteristics of elastic and thermal parameters of braided composites was studied by using Monte-Carlo simulation. A simulation method for modeling yarn path uncertainty of braided composites is provided in this paper for predicting the statistical characteristics of the equivalent elastic and thermal parameters.

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Stochastic analysis using the generalized perturbation stable node-based smoothed finite element method

Cited by 45 publications

References 39 publications

Design and strength simulation of hub mechanism of variable pitch propeller

Design and strength simulation of hub mechanism of variable pitch propeller

A generalized isogeometric boundary element method for the uncertain analysis of infinite domain two-dimensional acoustic problems

Modeling of Internal Geometric Variability and Statistical Property Prediction of Braided Composites

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