Considering non ideal factors of the real ball joint(there is gap and friction between the ball head and the ball sleeve),analyzed the mechanical characteristics of non ideal ball joints,established the equivalent mechanical model for non ideal hinge supported compression bars at both ends,obtained the theoretical formula for the true buckling critical load of non ideal hinge supported compression bars at both ends,and provided the applicable conditions for the theoretical formula,additionally analyzed and discussed the theoretical formula.And theoretical calculation,numerical simulation,experimental research are conducted on two typical types of hollow circular pipes with non ideal hinge supported at both ends as an example.The research shows that the non ideal factors of the real ball joint can cause the true buckling critical load of the hinge supported compression bars at both ends to be greater than the ideal value;the lager the gap between the ball head and the ball sleeve,the smaller the true buckling critical load of non ideal hinge supported compression bars at both ends,and the closer it approaches the ideal value.The theory established is universal and applicable to the compression bars with ideal hinge support at both ends,non-ideal hinge support at both ends and ideal fixed support at both ends.
关键词
非理想铰支/球铰/压杆/临界载荷/屈曲
Key words
non ideal hinge supported/ball joint/compression bars/critical load/buckling
维普
万方数据