The state space method coupled with the technique of differential quadrature (SSDQM) was presented for planestress problems.
针对平面应力问题，提出了利用状态空间法和微分积分法的混合解法（SSDQM）。
2
The state equation of Pieoelectric beam is deduced directly from a piezoelectric physical equation in terms of a planestress problem.
按平面应力问题，直接从压电物理方程出发，导出了压电梁的状态方程。
3
Based on the analytical formula of the planestressstate, a simple and direct distinguishing method is derived with regard to the direction in which the maximal extremes lie.