According to a detonation combustor with 60mm inner diameter

the finite element model was built

and the actual detonation loading obtained by experiments was loaded.The influences of different factors on equivalent stress of detonation combustor were calculated under multi-cycle working condition

and the optimization of the detonation combustor wall with constant thickness was completed.It is found that the peak equivalent stress at rear section is 20MPa higher than that at head section on average.The temperature has a significant effect on the equivalent strain of detonation combustor

and the maximum equivalent strain at 30Hz is increased by 51.2% if the temperature is considered.Compared with the material and temperature

the wall thickness of detonation combustor has great influence on the equivalent stress.Under the room temperature and wall thickness of 0.95mm

the maximum equivalent strain reaches 200MPa

almost reaching the yield limit (205MPa) of the material.The calculation results by replacing the model material show that materials with the characteristics of higher yield limit

modulus of elasticity and lower density can reduce the equivalent stress of detonation combustor.