Optimization design and modality analysis on end surface of tool rod in ultrasonic casting;

By establishing the mathematical model, the kinetic laws of acoustics system in ultrasonic vibration drilling are analyzed and the local resonance phenomenon of tool rod are studied.

Dynamic force analysis of fork rod of the aerial working platform in substation;

Combined with practical engineering,the author introduces design notes of blocked vertical double-bank risers fastener scaffold,illustrates the design and computing process of its longitudinal and transverse horizontal arm,gliding resistance internal force of fastener and upright stanchion by probability limit state theory,which to offer a reference for colleagues.

According to field test study of high-formwork support system in a hall of high-rise building,the stress changes of upright stanchion,cross bar,bridging and lock braking column parts,which are in fastener-style formwork support system,are monitored by real-time from concrete pouring to maintenance.