我是做ansys熱力耦合的，我最近碰到一個(gè)問題，我才用solid226單元進(jìn)行直接耦合，可是命令流運(yùn)行到求解階段就是求不出來，出現(xiàn)這樣的錯(cuò)誤， The calculated specific heat at constant strain (Cv) is negative. (See section "Thermoelasticity" of the Theory Reference for the definition of Cv.) Please verify the input of thermal material quantities for consistency. 我實(shí)在不知道哪里有問題，萬分感謝。