Theoretical Study on the Relationship between Stiffness and Modal of Railway Passenger Car Bodies
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 12
Abstract
［Objective］ To analyze the relationship between carbody stiffness and modal, and to provide theoretical support for the modal analysis of lightweight carbodies, it is necessary to conduct a theoretical study on both aspects. ［Method］ Taking the 25T passenger vehicle as the research object, a finite element model of the carbody is established. Static and dynamic performance analysis of the carbody is carried out to identify key structures affecting the carbody modal. A carbody plate-beam mixed finite element model is established based on carbody geometric features. Using the optimal Latin hypercube sampling method, 40 sets of design variables for the chassis are obtained, and the carbody modal and equivalent stiffness results under different geometric parameters are further calculated. The modal of the lightweight carbody is calculated and analyzed based on the function relationship between carbody stiffness and modal. ［Result & Conclusion］ The equivalent bending stiffness and equivalent torsional stiffness of the carbody are linearly and positively correlated with the first-order vertical bending and torsional modal frequencies, respectively. The optimized finite element results of the carbody show that the first-order vertical bending modal frequency increases from 9.04 Hz to 9.24 Hz, and the first-order torsional modal frequency increases from 15.99 Hz to 16.66 Hz, which are consistent with the theoretical relationship between stiffness and modal frequency.
Authors and Affiliations
Danxia JIANG, Yaohui LU, Chengyu SONG, Yadong ZHANG, Yu OUYANG
Keywords
Related Articles
- EP ID EP752745
- DOI 10.16037/j.1007-869x.2024.12.040
- Views 3
- Downloads 0
Rail-to-ground Insulation Defect Diagnosis Method Based on Spatiotemporal Correlation of Rail Potential
Objective The data of various monitoring points regarding rail potential as monitoring object is correlated in time and space, and the direct manifestation of changes in rail-to-rebar structural resistance is reflected i...
Design and Deployment Plan of Elastic Cluster Cloud Platform Architecture for Metro Passenger Flow Analysis Scenarios
[Objective] In the rapidly evolving landscape of digital technology, cloud computing is widely utilized in various industries including metro systems. To ensure passenger travel safety and achieve real-time acquisition a...
Study on Flow Plasticity and Permeability of Mixture Conditioned Muck for Metro Shield Tunnel in Water-rich Sand Stratum
[Objective] When tunnel boring machine advancing in the water-rich sand layer, problems such as high cutter torque, serious wear and spout of the screw conveyer can be easily generated. In order to ensure the safety of c...
Development of Automatic Calculation Program for Passenger Flow Assignment in Urban Rail Transit Network Based on VISUM
[Objective] In view of the much repetitive work in the calculation process of passenger flow assignment in urban rail transit network, an automatic calculation program is developed on the basis of the research on the pas...
Earth Pressure Calculation Method for Deep Foundation Pit Excavation in Chengdu Pebble Stratum Area
Objective The existing theoretical calculation method of earth pressure does not take into account the discrete characteristics of pebble stratum such as large porosity and loose structure, and the calculated results are...