Research On The Stability Of The Hinged Vibrator And The Anti-roll Mechanism Of The Anti-rolling Torsion Bar

As an efficient equipment for Petroleum geophysical prospecting,articulated vibroseis have become an important oil and gas exploration and development equipment because of their controllable seismic signal,Environmental exploration process and strong off-road capability.However,the articulated vibrator has poor lateral stability constrained owning its own structural characteristics.The poor lateral stability always reduce the efficiency,cause huge economic losses,and even will threaten the safety of the staff.At the present stage,the protection measures of vibroseis are mainly equipped with cab passive protection device and anti-warning system.But the two methods have no effect on the stability of articulated vibroseis.In order to improve the stability of articulated vibroseis,reduce the occurrence of dumping accidents,protect the lives of workers,this paper has carried out the analysis of the roll stability of the articulated and controllable source vehicle and the research on the anti-turn mechanism.The main research contents and achievements are as follows:(1)The dynamics of the roll stability of the articulated vibrating source is carried out.The value of LTR is used as the evaluation index of rollover stability.The 5-degree-of-freedom Lagrange equations of KZ28-AS are established.The numerical solution of equations is solved by BDF algorithm.The influence of slope angle,steering speed and driving speed on the stability of the rollover is analyzed.The order of importance of the three factors is as follows:slope angle>steering speed>driving speed.(2)The anti-roll mechanism structure has been designed.The KZ28-AS virtual prototyping model based on Adams/car template is proposed.The variation of the stability of the KZ28-AS in the four dangerous road conditions are analyzed,when the torsion bar stiffness varies between 1.00 and 2.50 MN · m/rad.The final determination of the torsion bar stiffness should be 1.50MN · m/rad.As a prerequisite,according to KZ28-AS available space installation size,the anti-roll roll mechanism design has been completed.(3)An anti-side roll bar finite element safety and reliability is analyzed.Based on the finite element software,the influence of the effective length and the preload angle of the torsion bar spring on the force variation of the torsion bar spring and the fatigue reliability analysis are carried out.The results show that increasing the effective length of the torsion bar spring can improve the conversion rate of the vertical kinetic energy of the vehicle body to the torsion bar spring torsional potential.The torsion bar spring is subjected to a maximum Von Mises stress of 878.7 MPa,which is less than the allowable stress of 900 MPa.Confrontation roll bar for fatigue life prediction,the indicators are in line with design requirements,which is saluted by ANSYS Workbench.