Four-point supporting and fixing device for double-fuselage model

The invention relates to a four-point supporting and fixing device for a double-fuselage model, and belongs to the technical field of aeroelasticity tests. The device comprises a double-hole fixed bent knife, two supporting rods, two rear joint supporting sleeves, two front joint supporting sleeves, two front joint cylindrical surface fixing plates and two front supporting sleeve fastening studs.The double-hole fixed bent knife comprises two hollow columnar connecting cylinders and a connecting rod; one of the supporting rods is coaxially butted with one of the connecting cylinders; the othersupporting rod is coaxially butted with the other connecting cylinder; the outer wall of the middle of each supporting rod is sleeved with one rear joint supporting sleeve. The axial head end of eachsupporting rod is sleeved with one front joint supporting sleeve. Each front node supporting sleeve is fixedly connected with the corresponding supporting rod through a front supporting sleeve fastening stud; a front node cyli