Multi-variable approach of contact-impact issue in variable topology system

Shi, Jiabei; Hong, Jin; Liu, Zhuyong

doi:10.1063/2.1301307

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…The same method was reported by Ambrósio et al (2009). Shi et al (2013) considered the elastic vibration of non-contact areas and used a floating coordinate system and modal coordinate description for non-contact areas. Chen et al (2016) and Tschigg and Seifried.…”

Section: Introductionmentioning

confidence: 99%

Investigation on model order reduction methods for flexible bodies with contact-impact based on partition modeling

Wang

Liu

2022

Journal of Vibration and Control

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The finite element method is widely used to solve the problem of flexible bodies with contact-impact. To express the high-frequency and high-transient characteristics of the impact process and the high stress distribution of the local contact region, the amount of the node coordinates will be very large, which brings great burden to the dynamic simulation. It is particularly important to reduce the degrees of freedom of the system in the contact-impact problem. However, as the impact itself is a strong nonlinear problem, the linear model reduction techniques cannot be used directly. The partition method is presented to solve this problem, in which the deformation of the contact region is described by finite element node coordinates to preserve the local nonlinear characteristic while the deformation of the non-contact region is described by the reduced elastic coordinates. Different model reduction techniques including modal truncation method and Krylov subspace method are used to reduce the degrees of freedom of the non-contact region of an experimental rod-plate impact case, and the results are compared with that of the finite element method and the experiment. The simulation results show that the partition method can effectively reduce the degrees of freedom of the system and maintain good accuracy. Moreover, the Krylov subspace method has an advantage over the modal method in the model reduction of contact-impact problem.

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Section: Introductionmentioning

confidence: 99%

Investigation on model order reduction methods for flexible bodies with contact-impact based on partition modeling

Wang

Liu

2022

Journal of Vibration and Control

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“…Two main topology-change models are available in multibody systems. The first is based on contact/impact mechanics, where spring-damping systems are used to represent the contact/impact area [30,31]. The influence of topology changes can be understood by means of this model.…”

Section: Introductionmentioning

confidence: 99%

A topology-change model of multi-speed transmissions in electric vehicles during gear-shifting

et al. 2018

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Recent developments in electric vehicles incorporate multi-speed transmissions to improve the electric vehicle range and performance. Similar to transmissions for fossil-fuel vehicles, those for their electric counterparts undergo topology changes during gear-shifting. However, this important phenomenon has been overlooked in the development of transmission mathematical models, which results in inaccurate prediction of the transmission dynamic response. In this study, a topology-change model based on the impulse-momentum relation is developed to address the topology change of multi-speed transmissions in electric vehicles during gear-shifting. An orthogonal complement is introduced to eliminate the non-working constraint forces. The velocity jump brought about by topology changes is given due attention. A case study is included, whereby the model is applied to a novel modular multi-speed transmission for electric vehicles. First, tests are conducted on the transmission experimental testbed; then, the test results are reproduced in simulation using the model developed herein. Moreover, the velocity jump of the gear-shifting is computed by means of the model. Subsequently, simulation of the transmission gear-shifting incorporating the velocity jump is conducted. It is shown that the topology-change model improves the accuracy of transmission mathematical models in predicting transmission dynamic responses during gear-shifting.

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Simulation on Flexible Multibody System with Topology Changes for In-space Assembly

Qi,

Shan

2024

J Astronaut Sci

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Multi-variable approach of contact-impact issue in variable topology system

Cited by 3 publications

References 6 publications

Investigation on model order reduction methods for flexible bodies with contact-impact based on partition modeling

Investigation on model order reduction methods for flexible bodies with contact-impact based on partition modeling

A topology-change model of multi-speed transmissions in electric vehicles during gear-shifting

Simulation on Flexible Multibody System with Topology Changes for In-space Assembly

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