公开(公告)号：US20190270495A1

公开(公告)日：2019-09-05

申请号：US16238251

申请日：2019-01-02

Applicant: HRL LABORATORIES, LLC

Inventor： Christopher P. Henry ,  Sloan P. Smith ,  David W. Shahan ,  Joseph Creecy ,  Jeffrey Bowles ,  Christopher Swanhart ,  Robert Walling

IPC: B63B1/22 ,  B63B1/04 ,  B63B3/24

Abstract: A watercraft includes a hull having inner and outer surfaces and at least one collapsible strake coupled to the hull. The collapsible strake includes a movable skin hingedly coupled to the hull. The collapsible strake also includes a dampening element and a negative stiffness element each extending from an inner surface of the movable skin to the outer surface of the hull. The movable skin is configured to rotate between an uncollapsed configuration having a first stiffness and a collapsed configuration having a second stiffness greater than the first stiffness.

公开(公告)号：US10683060B2

公开(公告)日：2020-06-16

申请号：US16238251

申请日：2019-01-02

Applicant: HRL LABORATORIES, LLC

Inventor： Christopher P. Henry ,  Sloan P. Smith ,  David W. Shahan ,  Joseph Creecy ,  Jeffrey Bowles ,  Christopher Swanhart ,  Robert Walling

IPC: B63B1/22 ,  B63B1/04 ,  B63B3/24

Abstract: A watercraft includes a hull having inner and outer surfaces and at least one collapsible strake coupled to the hull. The collapsible strake includes a movable skin hingedly coupled to the hull. The collapsible strake also includes a dampening element and a negative stiffness element each extending from an inner surface of the movable skin to the outer surface of the hull. The movable skin is configured to rotate between an uncollapsed configuration having a first stiffness and a collapsed configuration having a second stiffness greater than the first stiffness.