Method for simulating and calculating dynamic stress of a vehicle body structure of high-speed tracked vehicle

Abstract

The invention relates to the technical field of calculation, simulation and estimation of dynamic stress of a bearing structure of a high-speed tracked vehicle, in particular to a method for simulating and calculating dynamic stress of a vehicle body structure of the high-speed tracked vehicle. The method comprises two implementation steps of constructing a finished high-speed tracked vehicle system rigid-flexible coupling model based on a modal comprehensive method and calculating the dynamic stress of the vehicle body structure based on a modal stress recovering method. An integrated rigid body suspension system model, a propelling system model and a high-speed tracked vehicle rigid-flexible coupling complex dynamics model with a vehicle body structure finite element model are built by adopting a modal comprehensive technology, and the characteristics of the coupling dynamics between the vehicle system dynamics and the structure dynamics are accurately reflected. The method can obtain structural edge load at a designing and development stage of the high-speed tracked vehicle and simultaneously obtain structure dynamic stress, and provides effective means for design and improvement of a system structure of the high-speed tracked vehicle.

Description

technical field [0001] The invention relates to the technical field of dynamic stress calculation and simulation evaluation of a high-speed crawler vehicle bearing structure, in particular to a dynamic stress simulation calculation method for a car body structure of a high-speed crawler vehicle. Background technique [0002] When a high-speed tracked vehicle is running on a complex off-road road, the severe impact and vibration of the harsh road environment are the main reasons for the structural vibration of the high-speed tracked vehicle system, resulting in excessive structural dynamic stress or even structural damage. However, for a long time, due to the limitations of calculation methods and means, the structural design of the car body still relies on the traditional empirical design method. [0003] Since the 1990s, the finite element method has been gradually applied in the stress calculation of the body structure of high-speed tracked vehicles. However, there are tw...

AI Technical Summary

Problems solved by technology

However, there are two main problems in the calculation of body stress of high-speed tracked vehicles based on the finite element method: one is that the boundary load borne by the car body structure is difficult to obtain

Due to the complexity of the connection of the car body structure, it is difficult to accurately obtain all the boundary load conditions of the car body structure through the means of testing, especially in the design stage, because there is no test sample car, only the boundary load of the same type of vehicle can be used, so The obtained analysis and calculation results obviously cannot meet the actual design requirements

The second is the coupling problem between the dynamic characteristics of the vehicle system and the structural characteristics of the vehicle body

However, so far, in the field of research on the structural strength of high-speed tracked vehicles, there are still no relevant literature records on the consideration of the interaction between vehicle system dynamics and structural dynamic characteristics and the calculation of structural dynamic stress.

Images