Finite element simulation device and method for car body local structure instability of high-speed motor train unit

摘要

#$%^&*AU2015372457A120160929.pdf#####English Translation of PCT/CN2015/094174 ABSTRACT A finite element simulation device and a method for car body local structure instability of a high-speed motor train unit are provided. By adopting a linear buckling analysis and a finite 5 element simulation method, a car body structure in good condition and in a defect state, such as having a recess and a projection in a local part, are simulated, a critical loading force of motor train unit structure local instability is analyzed, thus guiding tool applying, an adjustment process and a setting of welding parameters in field processing and manufacturing, and further avoiding waste and potential security problems. In the present application, a 10 human-machine interaction device is adopted to model firstly according to car body drawings and to build and simulate a dent portion in the local part of the car body; a boundary constraint of the car body is established, a maximum vertical load and a compression load of the car body are linearly composited, the modal frequency of the car body is defined, a static load working condition and a linear buckling analysis working condition are established, then 15 a car body instability simulation analysis is performed to calculate a critical buckling coefficient, thus the maximum load allowed to be applied is obtained; if the critical buckling coefficient is greater than and equal to 1, it is determined that the part is reliable, and if the critical buckling coefficient is smaller than 1, it is determined that the part needs to be reinforced. -25-