Construction-vehicle cab with novel roll-over protection structure, and dynamic design method thereof

Abstract

The invention provides a construction-vehicle cab with novel roll-over protection structure, and a dynamic design method thereof, and belongs to the research field of safe construction-vehicle cabs. The dynamic design method for the construction-vehicle cab with the novel roll-over protection structure comprises the following steps: 1. preliminarily designing a roll-over protection structural proposal, as well as section shape, size, joint form and welding-seam type of each bearing component and auxiliary component; 2. performing static simulation of the safety performance of the roll-over protection structure; 3. performing static test on the roll-over protection structure; 4. performing dynamic simulation of whole-vehicle roll-over; 5. performing dynamic test on a whole vehicle; and 6. optimizing structural design based on an orthogonal test method. An energy guiding sleeve and an energy-absorbing structure are arranged in a cab frame of the construction-vehicle cab with novel roll-over protection structure. The invention can greatly increase the standard and high efficiency of the construction-vehicle cab design method, and improve the rate of passing destructive test at a time. The provided construction-vehicle cab with the novel roll-over protection structure is greatly improved in safety and reliability, low in cost and easy to manufacture and popularize.

Description

technical field [0001] The invention relates to the field of engineering vehicle safety cab research, in particular to an engineering vehicle cab with a novel rollover protection structure and a dynamic design method thereof. Background technique [0002] Engineering vehicles are non-highway vehicles. Due to their large mass, harsh working environment, limited working space, complex and changeable driving roads, and the decrease in stability of the vehicle during load-bearing operation, rollover accidents are unavoidable. Once a construction vehicle rolls over, it will cause serious personal injury or even death. In order to reduce the loss of life and property caused by the accident, the most effective method is to take passive safety protection measures, that is, to install a roll-over protective structure (Roll-over protective structure, ROPS for short) on the vehicle that can provide certain safety protection. [0003] Considering the various responses of ROPS during th...

AI Technical Summary

Problems solved by technology

At present, the dynamic design method of ROPS is one of the research topics in the field of structural dynamics and modern mechanical design methods; the problems that need to be solved include the contradiction between the ROPS bearing capacity and its energy absorption, and the control of the location of the deformation area.

[0005] The cab of traditional engineering vehicles is mainly welded by several uprights and beams. When the vehicle is overturned, the welds often suffer from brittle failure, and in severe cases, the overall brittle cracks will appear. After in-depth analysis, the main reason for the cracking of the joint welds between ROPS components is Poor weld quality or insufficient local rigidity of ROPS at the weld, resulting in excessive and uneven deformation

Chinese utility model patent 200520200806.1 mentions the method of setting multiple plastic holes at special positions of the cab column and setting composite beams inside the column. The design idea is to weaken the strong structure so that the cab can roll over as set Deformation occurs at the weaker position of the composite beam, but this obviously wastes material, and because the cross-section of the composite beam is flat, the stress at the transition is highly concentrated, and fracture is likely to occur when the vehicle rolls over, seriously threatening the personal safety of the driver

In addition, the composite beam is set inside the column, which is difficult to process and the quality is not easy to guarantee

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