Structure optimization design for the bus frame;

Finite element modeling of bus frame was established by using finite element methods,after the simplified load and load way exerting on the frame were ensured,the static strength,rigidity,mode characteristics of the bus frame were discussed,at the same time,the dynamic characteristics were analyzed.

This paper analysis of the bus frame structure and corresponding bus,then defines the classification of bus frame structure,research the technology development of bus frame.

The causes to breaking of bolster safety hangers on 209P passenger car bogies are analyzed,and suggestions for improvement are given.

In the end, the practical design of the reliability distribution in the passenger car bogie system is made on the basis of the average trouble rate obtained, according to the relative failure rate ratio and the distribution method of the importance degr.

Described are the main technical parameters,structure features,calculation and test of broad gauge passenger car bogies exported to Pakistan.

Based on investigation and statistics,several main factors affecting "serious unsteady operation"of passenger car trucks are inquired into,measures for resolution and suggestion for improvement are put forward.

In this paper,the development of the anti rolling torsion bar applied on high speed passenger car truck with permissible maximum speed of 250km/h,quasi high speed passenger car truck type CW 2,and double deck passenger car truck type 209PK is introduced.