Warning (Code 3940002) Pivot coefficient (element (68,68)) is less than zero or loss of digits happened ( 0.0000). This may cause numerical problems in factorization. User action: Please check the element(s) connected to ASET entry 68 for stiffness or mass singularities. Error (Code 7930004) Problems occurred when jacobian (calculated analytically) of body Engine was decomposed User action: (1) Contact the technical support. EXCITE v2014 - terminated abnor ... ...
林博士,请教一个问题,我在用BOOST做了一个简单的单缸自然吸气汽油机时,使用VIBE函数做的燃烧,需要填写IVC和EVO的角度,这些角度是否是测得的对应的凸轮配气相位数据,还有就是空气和燃油的捕捉效率怎么得到的,为什么在调整start of combustion或者
combustion duration时,最大爆发压力会发生明显的变化,但是IMEP却没有发生变化。