The invention belongs to the field of helicopter important joint fatigue test design, and relates to a tail-starting rocker arm joint fatigue test piece structure design method, which comprises the following steps of: 1, connecting a tail undercarriage rocker arm with a fuselage structure through a left joint and a right joint, and selecting a left or right joint and fuselage connecting structure as a tail-starting rocker arm joint fatigue test piece; 2, determining the technical state of the fatigue test piece of the tail-starting rocker arm joint; 3, determining an installation mode of a fatigue test piece of the tail-starting rocker arm joint; 4, creating a finite element model of the fatigue test piece of the tail-starting rocker arm joint; step 5, determining the thickness of a connecting area of the tail-start rocker arm joint fatigue test piece and the test fixture, and the number and the diameter of connecting bolts of the tail-start rocker arm joint fatigue test piece and the test fixture; and 6, according to the step 5, optimizing the finite element model in the step 4, carrying out damage calculation, and ensuring that a fuselage connection structure and a connection part of the fuselage connection structure and the test clamp are not subjected to fatigue damage before the tail-up rocker arm joint reaches the examination life.
本发明属于直升机重要接头疲劳试验设计领域,涉及一种尾起摇臂接头疲劳试验件结构设计方法,包括步骤1:将尾起落架摇臂通过左右侧两个接头与机身结构连接,选取左侧或右侧接头与机身连接结构作为尾起摇臂接头疲劳试验件;步骤2:确定尾起摇臂接头疲劳试验件技术状态;步骤3:确定尾起摇臂接头疲劳试验件安装方式;步骤4:创建尾起摇臂接头疲劳试验件的有限元模型;步骤5:确定尾起摇臂接头疲劳试验件与试验夹具连接区域的厚度、试尾起摇臂接头疲劳试验件与夹具连接螺栓个数和直径;步骤6:根据步骤5,优化步骤4中的有限元模型,进行损伤计算,保证尾起摇臂接头在达到考核寿命前,机身连接结构及与试验夹具的连接部位不会发生疲劳破坏。
Structural design method for fatigue test piece of tail-starting rocker arm joint
一种尾起摇臂接头疲劳试验件结构设计方法
2023-07-04
Patent
Electronic Resource
Chinese
IPC: | B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
Internal balance type fatigue test device and test method for tail rotor connecting piece
European Patent Office | 2024
|Fatigue test device for outer front flap and joint test piece
European Patent Office | 2020
|Fatigue Analysis for Isolated Rocker Cover Capscrews
British Library Conference Proceedings | 2002
|Fatigue test design method for bearingless rotor center piece
European Patent Office | 2023
|