推导了具有工程背景的弱正交异性材料的超声波斜入射应力－声关系．推导结果表明，对于弱正交异性材料，如果声波在材料对称面内斜入射，且满足ｎ２Ｅ的条件，则声波将以纯模传播，其传播速度与材料的应力状态及初始材料各向异性有关，并随传播方向而变化 The acoustic oblique-acoustic stress-acoustic relationship of weakly orthotropic materials with engineering backgrounds is deduced. The deduced results show that for the weakly orthotropic material, if the acoustic wave is obliquely incident on the plane of symmetry of the material and satisfies the condition of n2E, the acoustic wave will propagate in pure mode. The propagation velocity and the stress state of the material and the initial material anisotropy Related to, and depending on the direction of propagation