Analysis on the Strength and Rigidity of Weld Stainless Steel Body of 200 km/h Passenger Car Based on EN12663 Standard

Transcription

1 2017 International Conference on Information, Computer and Education Engineering (ICICEE 2017) ISBN: Analysis on the Strength and Rigidity of Weld Stainless Steel Body of 200 km/h Passenger Car Based on EN12663 Standard Song Cang ABSTRACT The article use weld stainless steel body of 200km/h passenger car as the research object. The determination of load parameters and working conditions based on EN12663 standard. Analysis on the strength and rigidity of the steel structure of the car body. The results show that the calculating stress of car body steel structure under various conditions is less than the allowable stress of material, Stiffness and strength meet the requirements, at the same time, provides the reference basis for the optimization design and the structure improvement of car body. Keywords: FEA; railway carriage; Stainless steel spot welding Introduction Stainless steel has many advantages, such as corrosion resistance, good appearance, long service life, light weight, high strength, low maintenance cost and so on. In this paper, the 200 km/h high speed railway passenger car body is stainless steel welding structure. The finite element analysis on the Strength and Rigidity of Passenger Car based on EN12663 Standard, to determine whether the car body meet the requirements. The basic parameters of car body The parameters of body material are shown in table 1 Table 1. The basic parameters of car body weight. Material Name Elasticity Modulus (GPa) Poisson's Ratio Density (g/cm 3 ) Yield Sstrength (MPa) SUS301L_DLT SUS301L_MT EN H EN B Carbon Steel Song Cang, Guidaojiaotong Polytechnic Institute, Shenyang, China 459

2 The basic parameters of car body weight are shown in table 2 Table 2. The basic parameters of car body weight. Number weight(kg) remark 1 Car body steel structure weight 1 11,700 2 Curb Weight 2 46,437 Contains steel structure, built-in and lower hanging 3 Complement passenger weight =4,800 Each passenger (including luggage) calculated at 80 kg 4 Overload passenger weight = people/m 2 5 maximum weight of passenger = people/m 2 6 Vehicle overloading load 52,757 6= Total body weight 54,298 7=2+3+5 Evaluation Standard According to standard GB/T , Under the effect of maximum vertical static load, the static deflection of rail vehicle is less than 1 of the distance between the two supporting point of the bogie. The length between truck centers of the car body is mm, therefore, the maximum deflection of the car body is no more than 19 mm. The evaluation criteria of finite element analysis of car body static strength and selection of safety coefficient are based on EN The geometry model and finite element model of the car body Using industrial modeling software Pro/E to build 3D model, the model as shown in figure 1 (a); Import the model into Hypermesh, divided into grids, The finite element model of the railway passenger train steel structure are mainly four node isoparametric shell element. Finite element model of the vehicle structure include: nodes, solid elements, housing units, unit solder joints, quality unit; To define the simulation parameters, set simulation working condition; Finally, using the ANSYS finite element analysis solver, car body finite element model as shown in figure 1 (b);the hardware is dell 64 NT workstation. (a) The geometry model of the car body (b) The finite element model of the car body Figure 1. The car body model. Load cases and displacement constraints Load cases and displacement constraints of working condition 1 460

3 Working condition 1 is the state of preparation, compression force by 1500 kn, height is in the center line of the coupler. Load including body weight of formation of the vertical load 46, / 1000= kn and compression force of 1500 kn. Among them, the state of preparation body weight in the form of gravitational acceleration applied; Compression force in the opposite direction of concentrated load applied at the center of the front and back coupling respectively. Displacement constraints: support was applied in the joint of bolster. Load cases and displacement constraints of working condition 2 The working condition 2 is: maximum load, the height of coupler, compression force by 1500 kn. The working condition of load (body weight and the maximum passenger weight form of vertical load) : x 9.81/1000 = kn, and compression force of 1500 kn. Among them, preparing a body weight in the form of gravitational acceleration applied; Passenger load evenly applied to the floor; Compression force on the coupling center of gravity position, in the form of a pair of opposite direction of concentrated load applied respectively. Displacement constraints: applying supporting position in the bolster connections. Static strength analysis results Computing the car's steel structure, get the results as follows: Under the maximum vertical static load, the maximum deflection of the vehicle body is mm, in the middle of the floor, the cloud picture of the bodywork chassis side beams and vertical displacement is shown in figure 2. Working condition (a) Chassis beam (b) car body Figure 2. Vertical displacement nephogram. Table 3. The maximum displacement and maximum stress. Max longitudinal Maximum stress displacement (mm) (MPa) Max vertical deviation (mm) Location of maximum stress The root of the steel skeleton The back-end pillow beam side panel 461

4 Displacement and the stress nephogram of two kinds of working condition is as follows: The cloud ofworking condition 01: (a)longitudinal displacement nephogram (b) Von. Misesstress nephogram (c)max stress of car-body steel structure (d)max stress nephogram of cab door Figure 3.The displacement nephogram and strain nephogram of steel structure (condition 01). The cloud ofworking condition 02: (a)longitudinal displacement nephogram (b) Von. Misesstress nephogram 462

5 (c)max stress of car-body steel structure (d) Max stress nephogram of cab door Figure 4. The displacement nephogram and strain nephogram of steel structure (condition 02). Conclusion Through calculation, the steel structure of head-caris optimized and the comparison of various schemes, the optimal solution of the calculation results shows that: (1)Static strength meets the requirements of various working conditions. The max Von Mises stress and the static safety factor in the following table: Working condition Location of max stress Table 4. The max stress and the static safety factor. Max stress (Mpa) The material of the maximum stress position Material yield strength of the max stress location(mpa) Flat envelope factor of safety 01 The front bumper beam carbon steel The back-end pillow beam carbon steel (2)Under the effect of maximum vertical static load, the maximum deflection of the car body is mm, less than 19 mm, meet the requirements. References 1. Zhang Jinde.Tian Baoshuan, Li Daiying, et a1. Railway Transport of Long and Large Goods in China[M].Beijing: China Railway Publishing House, Tian Baoshuan, Wang Kehui. Requirement and Development of Railway Special-Purpose Wagon[J].Chinese Railways, 2003(7):