The free vibration analysis is conducted by using arch-frame structure model for brick arch floor, from this the local vibration and the whole vibration of the arch are studied.

The Airbus A380 has 50% more floor space than arch rival Boeing's 747 Jumbo, with room for duty-free shops, restaurants and even a sauna, and can provide site for up to 853 people.

Firm your scapulas against your back torso, lengthen your coccyx toward the floor, and arch your upper torso back slightly.