Considering the Requirements of Static Strength for the Rotating Straight Blade Similar Experimental Model Design Method

doi:10.3901/JME.2016.09.079

Abstract

Abstract: In allusion to the design problems of the rotating straight blade similitude model, a design method of the dynamic similitude model, with the consideration of the requirement of static strength, is presented. The rotating structure composed by the blade disk and single straight blade is considered as the research object, where the vibration theory of plates and shells is applied to establish the governing equation; and the inertial force and aerodynamic force of the rotating straight blade are equivalent to the effect of static load on the blade. The strength design criteria are established based on the stress analysis of the blade, and the equation analysis method is adopted to establish the dynamic scaling laws. The conclusion, that when the material of the model and the prototype are different, the incomplete geometric similitude model should be employed to meet the strength requirement, is theoretically proved. The effectiveness of the similitude design approach is validated by using the numerical simulation method in a designed example. The results provide some theory supplements for the dynamic similitude model design of such rotating plate components.

Key words: blade, dynamic similitude model, experimental model, rotating, strength

CLC Number:

TH113

LUO Zhong¹, GUO Jian², ZHU Yunpeng³, HAN Qingkai⁴, WANG Deyou⁵. Considering the Requirements of Static Strength for the Rotating Straight Blade Similar Experimental Model Design Method[J]. Journal of Mechanical Engineering, 2016, 52(9): 79-85.

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