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将连杆视为变截面杆、计压力角的变化，并用动静法分析惯性力对连杆应力的影响，作出应力随曲柄转角和沿连杆杆身长度方向的变化曲线．
The connecting rod is regarded as the rod with variable section, the change of pressure angle is analyzed, and the influence of inertial force on the connecting rod stress is analyzed by static and dynamic method. The curve of stress with the crank angle and along the length direction of the connecting rod is made.