In order to evaluate the difference of dynamic characteristics of single-cavity buffer and double-cavity buffer on landing gear

based on the model of non-linear multi-body dynamic system

mathematical simulation models of single-cavity buffer and double-cavity buffer were established with using LMS Motion dynamic system simulation software. On the basis of fully verifying the validity of simulation models

the dynamic characteristics of shock such as axial force load

compression travel and heading friction of the buffers were quantitatively compared. The results show that the double-cavity buffer reduces 53 kN and 15.9% of post-load peak compared with the single-cavity buffer

which can effectively reduce the jerk condition during landing. Compared with single-cavity buffer

double-cavity buffer increases the peak interval time by 0.1 s or about 10.3%

and improves the comfort of passengers on landing. The work done by the double-chamber buffer on the course friction force produced by the single-chamber buffer is reduced by 5 kJ and about 7% compared with that produced by the single-chamber buffer

which can reduce the wear of the tires on landing of the aircraft under certain circumstances. The compression stroke of double-chamber buffer is 22.1 mm higher than that of single-chamber buffer

about 7% higher

and the stroke requirement of double-chamber buffer is higher. The energy absorption efficiency of double-cavity buffer is lower than that of single-cavity buffer.