孔内表面 meaning in Chinese

lochlaibung wall of the rivet hole

In the simulation , the mpc technique of msc . nastran is used to simulate the mechanical behavior of contact between the interfaces of piston pin and bearing of small end , crankpin and big end bearing , connecting rod body and bearing cap ; also constraints are applied to the connecting rod reasonably
分析中采用了patran中的多点约束( mpc )技术，有效地模拟了活塞销与小头孔内表面、曲柄销与大头孔内表面以及连杆体与大头盖接触面的力学接触状态，并对连杆进行合理的约束。