DYNAMIC ANALYSIS TO INFINITE BEAM UNDER A MOVING LINE LOAD WITH UNIFORM VELOCITY

Based on the principle of linear superposition, this paper proves generalized Duhamel's integral which reserves moving dynamical load problem to fixed dynamical load problem. Laplace transform and Fourier transform are used to solve patial differential equation of infinite beam. The generalized Duhamel's integral and deflection impulse response function of the beam make it easy for us to obtain final solution of moving line load problem. Deep analyses indicate that the extreme value of dynamic response always lies in the center of the line load and travels with moving load at the same speed. Additionally, the authors also present definition of moving dynamic coefficient which reflects moving effect.

先天性巨结肠改良Duhamel’s根治术并发症的预防及处理

目的 探讨先天性巨结肠根治术并发症的预防及处理方法。方法 采用改良Duhamel’s根治术治疗4 8例先天性巨结肠患儿。结果 近远期并发症发生率低 ,分别为 10 %及 2 0 %。结论 改良Duhamel’s根治术是治疗先天性巨结肠的一种较好的术式。

改良Duhamel‘’s手术治疗先天性巨结肠105例

目的：对105例小儿先天性巨结肠行改良Duhamel''s手术进行分析、总结。方法：105例小儿先天性巨结肠均用马氏环钳行结肠前壁与直肠前壁斜行吻合术。结果：105例患儿均获痊愈，无1例近远期并发症发生。结论：采用该术式治疗先天性巨结肠症，具有良好的效果，同时能避免术后闸门瓣及盲袋和吻合口狭窄的发生。