燃气轮机压气基座强度和刚度的有限元计算

利用有限元结构分析软件ANSYS,对燃气轮机压气基座按竖向起吊、水平放置和竖向放置3种工况分别进行强度和刚度计算,对结构几何形状发生突然改变引起的应力集中进行分析。通过计算对初步设计方案进行调整。改进后设计的结构强度和刚度足够,可作为燃气轮机压气基座的施工图纸的设计依据。     

重型燃气轮机吊具有限元模态分析

利用有限元结构分析ANSYS软件,采用混合建模方法,对重型燃气轮机整机吊具进行前几阶固有频率及其振型计算.通过有限元模态分析,对设计方案进行动力学评价,证明吊具设计方案的合理性.     

Bifurcation control of nonlinear oscillator in primary and secondary resonance

A weakly nonlinear oscillator was modeled by a sort of differential equation, a saddle-node bifurcation was found in case of primary and secondary resonance. To control the jumping phenomena and the unstable region of the nonlinear oscillator, feedback controllers were designed. Bifurcation control equations were obtained by using the multiple scales method. And through the numerical analysis, good controller could be obtained by changing the feedback control gain. Then a feasible way of further research of saddle-node bifurcation was provided. Finally, an example shows that the feedback control method applied to the hanging bridge system of gas turbine is doable.