Crashworthiness analysis of foam filled star shape polygon of thin-walled structure

Goyal, Sahil; Anand, Chirag; Sharma, Satish C.; Sharma, Rakesh Chandmal

doi:10.1016/j.tws.2019.106312

Cited by 67 publications

(16 citation statements)

References 27 publications

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“…With β = 4 w 2 c ρ c /(E I) and cos βL c cosh βL c − 1 = 0. When using the modal analysis approach and considering the eigenfunction's orthogonality property in the vertical bending of a vehicle body, Equation (1) becomes three two-order deferential equations with ordinary derivatives, representing the bounce, pitch, and bending movements in the CB [40][41][42][43][44][45][46][47].…”

Section: Modeling Of Flexible Car Bodymentioning

confidence: 99%

Numerical and Experimental Analysis of DVA on the Flexible-Rigid Rail Vehicle Carbody Resonant Vibration

Sharma

Lee

et al. 2022

Sensors

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This paper examines the influence of the equipment considered as a DVA (Dynamic Vibration Absorber) upon the mode of vertical vibrations of the car body in high-speed vehicles. The car body is represented as an Euler-Bernoulli beam to minimize flexible vibration. The DVA approach is used to find the appropriate suspension frequencies for various types of equipment. A vertical mathematical model with a flexible car body and equipment is developed to investigate the effect of equipment mass, suspension stiffness, damping, and mounting location on car-body flexible vibrations. A three-dimensional, rigid-flexible coupled vehicle system dynamics model is developed to simulate the car body and equipment’s response to track irregularities. The experimental result was considered to verify the theoretical analysis and dynamic simulation. The mathematical analysis demonstrates that the DVA theory can be used to design the suspension parameters of the equipment and that it is suitable and effective in reducing the flexible vibration of the car body in which the vertical bending mode is greatly affected. Heavy equipment should be mounted as close to the car body’s center as possible to achieve significant flexible vibration reduction, whereas light equipment contributes very little flexible vibration reduction.

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Section: Modeling Of Flexible Car Bodymentioning

confidence: 99%

Numerical and Experimental Analysis of DVA on the Flexible-Rigid Rail Vehicle Carbody Resonant Vibration

Sharma

Lee

et al. 2022

Sensors

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“…The energy absorption capacity of honeycomb steel structure in this study was measured by four indexes (Baroutaji et al, 2014; Goyal et al, 2019; Guler et al, 2010; Hála et al, 2020; Hu et al, 2019; Li et al, 2018, 2020; Supian et al, 2020; Zang et al, 2020): crushing force efficiency (CFE), stroke efficiency (SE), total energy absorption (TEA), and specific energy absorption (SEA), where CFE is the ratio of average load F mean to peak load F max , as shown in equation (1), where the average load refers to the TEA divided by effective compression deformation (not considering the compact section of C-D). A larger CFE value corresponds to a higher structural stability during compressionSE is the ratio of effective compression deformation to specimen height, representing the structural deformability during energy absorption, as shown in equation (2)TEA is the total energy absorption of the structure during loading process, equaling to the area enclosed by the effective deformation internal load–displacement curve and the coordinate axis, as calculated by equation (3)where x is the loading displacement and F ( x ) is the load reaction force when loading displacement equals to x .…”

Section: Shcs Performancesmentioning

confidence: 99%

A new polyurethane-steel honeycomb composite pier anti-collision device: Concept and compressive behavior

Zhang

Xie

et al. 2022

Advances in Structural Engineering

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A new type of pier anti-collision composite structure composed of honeycomb steel and polyurethane (PU) elastomer was proposed in this study. The impacts of the shape and filling materials of inner core cells on the failure mode, load–displacement cure, bearing capacity, structural stability, and energy absorption were studied by conducting uniaxial compression tests on device segments. Test results showed that the bearing capacity, structural stability, and energy absorption of honeycomb steel structure were significantly improved by PU elastomer filling. Besides, when compared with the square honeycomb structure and the regular hexagon honeycomb structure, the maximum values of average load, total energy absorption (TEA), and specific energy absorption (SEA), which were 69.6 kN, 1986.1 J, and 1300 J/kg, respectively, for the regular triangle honeycomb structure without PU filling, increased to 459.3%, 376.38%, and 212.5%, respectively, for the regular hexagonal core cell structure with PU filling, which was proved to be the most suitable core structure for pier anti-collision device.

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“…The important issues of bridge safety due to railway vehicle passages and their running ability along with the passenger comfort have been studied by researchers. 12–14 It was determined that, periodic inputs due to the railway vehicle passages create local deformation and fatigue damage to bridge structures, therefore decline the bridge safety. The effects of friction coefficient, flange contact angle and primary suspension forces on the derailment safety have been determined.…”

Section: Introductionmentioning

confidence: 99%

“…skyhook, groundhook and hybrid control, linear optimal control, gain scheduling control, adaptive control, H∞ control, preview control, sliding mode control, fuzzy logic control, neural network control, and human-simulated intelligent control have been introduced to enhance the vehicle performance. 12–14,16–20…”

Section: Introductionmentioning

confidence: 99%

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system

Bhardawaj

Sharma

2020

Proceedings of the Institution of Mechanical Engineers, Part K:

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In this paper, the semi-active suspension in railway vehicles based on the controlled Magnetorheological (MR) fluid dampers is examined, and compared with the semi-active low and semi-active high suspension systems to enhance the running safety, ride quality and ride comfort for a high-speed rail vehicle. Fuzzy logic and chaotic fruit fly control techniques are used as system controllers to determine desired damping forces for front and rear bogie frame with force track-ability of system controllers. A 28 degrees of freedom (DoF) mathematical model of the rail vehicle is formulated using nonlinear vehicle suspension and nonlinear heuristic creep model. The Modified Dahl model is formulated to characterize the behavior of the MR damper. The simulation result is validated using the experimental results. Four different suspension strategies are proposed with MR damper i.e. passive, semi-active low, semi-active high and semi-active intelligent compound controller based on bio-inspired chaotic fruit and fuzzy logic hybrid controller. A comparison indicates that the semi-active controller gives the optimum performance based on frequency and time response analysis for comfort vibration actuation (9.088 to 15.33%), ride quality (14.81–20.73%) and comfort (24.91–27.81%) and it has little influence on derailment quotients, offload factors, as a result, it will not endanger the running safety of rail vehicle.

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Crashworthiness analysis of foam filled star shape polygon of thin-walled structure

Cited by 67 publications

References 27 publications

Numerical and Experimental Analysis of DVA on the Flexible-Rigid Rail Vehicle Carbody Resonant Vibration

Numerical and Experimental Analysis of DVA on the Flexible-Rigid Rail Vehicle Carbody Resonant Vibration

A new polyurethane-steel honeycomb composite pier anti-collision device: Concept and compressive behavior

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system

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